Crystal Patents (Class 368/159)
  • Patent number: 10284143
    Abstract: In a quartz crystal unit, the unit comprising a quartz crystal tuning fork resonator having a quartz crystal tuning fork base, and first and second quartz crystal tuning fork tines, each of the first and second quartz crystal tuning fork tines having a first vibrational portion including a first width and a second vibrational portion including a second width greater than the first width, at least one groove being formed in at least one of opposite main surfaces of the first vibrational portion of each quartz crystal tuning fork tine, the first width of the first vibrational portion of each quartz crystal tuning fork tine being greater than 0.03 mm and less than 0.075 mm and the second width of the second vibrational portion of each quartz crystal tuning fork tine being greater than 0.04 mm and less than 0.23 mm.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: May 7, 2019
    Assignee: PIEDEK TECHNICAL LABORATORY
    Inventor: Hirofumi Kawashima
  • Patent number: 9869975
    Abstract: An electronic timepiece has a time display unit including a dial made from a non-conductive material, and hands; and a movement that drives the hands. The movement includes a circuit board, a planar antenna attached to the circuit board, a stepper motor that drives the hands, and a battery. The planar antenna, the stepper motor, and the battery are disposed to positions overlapping the time display unit in plan view, and not overlapping each other in plan view.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: January 16, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Teruhiko Fujisawa, Shuichi Tamura
  • Patent number: 9553560
    Abstract: In a quartz crystal unit, the unit comprising a case, a quartz crystal tuning fork resonator and a lid, the resonator having a tuning fork base, and first and second tuning fork tines, each of the first and second tuning fork tines having a first side surface and a second side surface opposite the first side surface, the first side surface of the first tuning fork tine confronting the second side surface of the second tuning fork tine; at least one groove having a plurality of surfaces including a first surface being formed in at least one of first and second main surfaces of each of the first and second tuning fork tines so that only the first surface of the at least one groove is directly opposite the first side surface of the corresponding tuning fork tine and a width of the at least one groove is greater than or equal to a distance in the width direction of the at least one groove measured from an outer edge of the at least one groove to an outer edge of the corresponding one of the first and second tunin
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: January 24, 2017
    Assignee: PIEDEK TECHNICAL LABORATORY
    Inventor: Hirofumi Kawashima
  • Patent number: 9535404
    Abstract: A method for adapting a timepiece movement includes measuring a loss of energy for each free oscillation of the balance at atmospheric pressure; measuring the loss of energy for each free oscillation at a given low pressure corresponding to a working pressure intended for a modified movement; using i) the measured loss of energy at atmospheric pressure and ii) the measured loss of energy at the given low pressure, determining a percentage of energy gain of the balance between respective i) measurements of the measured loss of energy at atmospheric pressure and ii) measurements of the measured loss of energy at the given low pressure; and reducing a torque delivered to the escapement by a value corresponding to the determined percentage of energy gain.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: January 3, 2017
    Assignee: CARTIER INTERNATIONAL AG
    Inventors: Kewin Bas, Cyrille Chatel
  • Patent number: 9429915
    Abstract: The electronic module (1) includes a quartz or MEMS resonator (3), which is confined within a resonator case (5), which is provided with electrical contact pads (15) over at least one external surface for the electrical connection of the resonator. A printed circuit board (6) is also provided for carrying the resonator case (5) and it includes electrical connection terminals (18) for connection to the electrical connection pads (15) of the resonator case. The resonator case (5) is fixedly held inside a case structure (6, 9) of the electronic module (1), via at least one mechanical shock damping element (7). The damping element 7) may be an elastomer element, which includes metal wires (17) for the electrical connection of the resonator case (5) across the printed circuit board (6).
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: August 30, 2016
    Assignee: ETA SA Manufacture Horlogere Suisse
    Inventor: Francois Klopfenstein
  • Publication number: 20140269227
    Abstract: A timepiece device includes a control unit for time keeping, which is synchronizable by a clock generator. The timepiece device has at least two crystal oscillators built respectively by at least one crystal unit, whereby a first crystal oscillator with a first crystal unit and with a predetermined nominal oscillation frequency is suitable for use as the clock generator of the control unit during a vehicle standby mode, and whereby the oscillation frequency of the first crystal oscillator is at least temporarily measured and adjustable by a second crystal oscillator with a second crystal unit whose nominal oscillation frequency is higher than that of the first crystal oscillator. In a method of operation of the timepiece device, the oscillation frequency of the second crystal oscillator is compensated against the temperature by the software inside the control unit.
    Type: Application
    Filed: May 11, 2012
    Publication date: September 18, 2014
    Inventors: Borislav Bobev, Krassimire Stoyanov
  • Publication number: 20140192628
    Abstract: A piezoelectric vibrating piece includes a pair of vibrating arm portions, a base portion which is arranged between a pair of vibrating arm portions, and connecting portions which connect proximal end portions of a pair of vibrating arm portions and a proximal end portion of the base portion. Narrow width portions are provided at the base of the base portion.
    Type: Application
    Filed: January 6, 2014
    Publication date: July 10, 2014
    Applicant: SII Crystal Technology Inc.
    Inventor: Masanori TAMURA
  • Patent number: 8724431
    Abstract: A temperature-compensated resonator includes a body used in deformation, wherein the core (58, 58?, 18) of the body (3, 5, 7, 15, 23, 25, 27, 33, 35, 37, 43, 45, 47) is formed from a plate formed at a cut angle (??) in a quartz crystal determining the first and second orders temperature coefficients (?, ?, ??, ??). According to the invention, the body (3, 5, 7, 15, 23, 25, 27, 33, 35, 37, 43, 45, 47) includes a coating (52, 54, 56, 52?, 54?, 56?, 16) deposited at least partially on the core (58, 58?, 18) and having first and second orders Young's modulus variations (CTE1, CTE2, CTE1?, CTE2?) according to temperature of opposite signs respectively to the first and second orders temperature coefficients (?, ?, ??, ??) of the resonator so as to render compensated first and second orders temperature coefficients substantially zero.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: May 13, 2014
    Assignee: The Swatch Group Research and Development Ltd
    Inventors: Thierry Hessler, Silvio Dalla Piazza
  • Patent number: 8149651
    Abstract: The invention concerns an electronic watch comprising an electric motor (5) for driving analogue display means (6), and a time base (1, 2) comprising an oscillator circuit (2) and a resonator (1), both mounted in the same case (9), characterized in that said case further comprises a control circuit (4) for said electric motor.
    Type: Grant
    Filed: August 14, 2007
    Date of Patent: April 3, 2012
    Assignee: ETA SA Manufacture Horlogère Suisse
    Inventors: Thomas Meier, Fabien Blondeau, André Zanetta, Emmanuel Fleury, Silvio Dalla Piazza, Pierre-André Meister
  • Publication number: 20120039153
    Abstract: A piezoelectric vibration piece that can ensure good drive level characteristics and a piezoelectric vibrator, oscillator, electronic device and radio-controlled timepiece in which the piezoelectric vibration piece is used are provided. The width of the base-end side of the grooves 5 is narrower than that of the tip side of the grooves 5. The base 4 includes: a mount section 4a on the outer surface of which mount electrodes 12, 13 are formed to mount the piezoelectric vibration piece 1; and an intermediate section 4b that is connected to the mount section 4a and the pair of vibrating arms 3a, 3b so as to be positioned between the mount section 4a and the pair of vibrating arms 3a, 3b, on the outer surface of which leading electrodes 14a, 14b that connect the pair of excitation electrodes 10, 11 and the mount electrodes 12, 13 are formed. The width of the mount section 4a is wider than that of the intermediate section 4b.
    Type: Application
    Filed: August 3, 2011
    Publication date: February 16, 2012
    Inventor: Takashi KOBAYASHI
  • Publication number: 20110305120
    Abstract: The invention relates to a temperature-compensated resonator including a body used in deformation, wherein the core (58, 58?, 18) of the body (3, 5, 7, 15, 23, 25, 27, 33, 35, 37, 43, 45, 47) is formed from a plate formed at a cut angle (??) in a quartz crystal determining the first and second orders temperature coefficients (?, ?, ??, ??). According to the invention, the body (3, 5, 7, 15, 23, 25, 27, 33, 35, 37, 43, 45, 47) includes a coating (52, 54, 56, 52?, 54?, 56?, 16) deposited at least partially on the core (58, 58?, 18) and having first and second orders Young's modulus variations (CTE1, CTE2, CTE1?, CTE2?) according to temperature of opposite signs respectively to said first and second orders temperature coefficients (?, ?, ??, ??) of said resonator so as to render the latter substantially zero. The invention concerns the field of time and frequency bases.
    Type: Application
    Filed: June 9, 2011
    Publication date: December 15, 2011
    Applicant: THE SWATCH GROUP RESEARCH AND DEVELOPMENT LTD
    Inventors: Thierry Hessler, Silvio Dalla Piazza
  • Publication number: 20110249535
    Abstract: A method of manufacturing a piezoelectric vibrator according to the invention includes the steps of: inserting a core portion of a conductive rivet member, which includes a planar base portion and the core portion extending in a direction vertical to the surface of a base portion, into a penetration hole of the base substrate and bringing the base portion of the rivet member into contact with a first surface of the base substrate; applying a paste-like glass frit on a second surface of the base substrate and moving a first squeegee which comes into contact with the second surface with an attack angle in one direction to thereby fill the glass frit in the penetration hole; and moving a second squeegee which comes into contact with the second surface with an attack angle in a direction opposite to the one direction to thereby fill the glass frit applied redundantly on the second surface in the penetration hole.
    Type: Application
    Filed: June 23, 2011
    Publication date: October 13, 2011
    Inventors: Yoichi Funabiki, Masashi Numata, Kazuyoshi Sugama
  • Publication number: 20110221310
    Abstract: Provided are a method of manufacturing a package capable of forming a penetration electrode without conduction defects while maintaining the airtightness of a cavity, a piezoelectric vibrator manufactured by the manufacturing method, and an oscillator, an electronic apparatus, and a radio-controlled timepiece each having the piezoelectric vibrator. A penetration electrode forming step includes: a penetration hole forming step of forming a penetration hole in a base substrate wafer (first substrate); a first paste material filling step of filling a first paste material in the penetration hole and temporarily drying the first paste material; and a second paste material filling step of filling a second paste material in the penetration hole so as to be overlapped on the first paste material. The first paste material has a viscosity lower than the second paste material.
    Type: Application
    Filed: March 14, 2011
    Publication date: September 15, 2011
    Inventor: Yoshihiro Kusanagi
  • Publication number: 20100246340
    Abstract: The invention concerns an electronic watch comprising an electric motor (5) for driving analogue display means (6), and a time base (1, 2) comprising an oscillator circuit (2) and a resonator (1), both mounted in the same case (9), characterized in that said case further comprises a control circuit (4) for said electric motor.
    Type: Application
    Filed: August 14, 2007
    Publication date: September 30, 2010
    Applicant: ETA SA MANUFACTURE HORLOGÈRE SUISSE
    Inventors: Thomas Meier, Fabien Blondeau, André Zanetta, Emmanuel Fleury, Silvio Dalla Piazza, Pierre-André Meister
  • Publication number: 20100128573
    Abstract: Mechanical clockwork assembly, comprising a drive mechanism, a mechanical control device comprising a mechanical oscillator and a first transmission device for providing a transmission between the drive mechanism and the mechanical oscillator, an electric generator and a second transmission device for providing a transmission between the drive mechanism and the generator, wherein the generator is spaced apart from the mechanical oscillator. In one embodiment the clockwork assembly comprises a sensor for determining a timing of the mechanical oscillator, an actuator for adapting a timing of the mechanical oscillator, an electronic control device connected to the sensor and the actuator, wherein the control device comprises an entry for a reference signal for controlling the timing of the mechanical oscillator on the basis of the reference signal, and wherein at least the control device is connected to the generator for supplying the control device with electric energy from the generator.
    Type: Application
    Filed: July 5, 2007
    Publication date: May 27, 2010
    Inventors: Bernardus Johannes Meijer, Petrus Matheus Josephus Knapen
  • Publication number: 20100080088
    Abstract: The time base device for a watch includes at least one electric motor coil (30), an electronic module (1) that has at least one time base oscillator circuit mounted in a case of the module, and an electric power source (8). The electric motor coil (30), the electronic module (1) with an oscillator circuit and the voltage source (8), which is preferably a battery, are connected to each other mechanically and electrically without the use of a printed circuit board to form a compact unit. The electronic module includes four connection terminals (14, 15, 16, 17) on an external surface for connecting the voltage source on one side and the wires (31, 32) of a winding of the coil (30) on the other side.
    Type: Application
    Filed: September 21, 2009
    Publication date: April 1, 2010
    Applicant: ETA SA MANUFACTURE HORLOGERE SUISSE
    Inventor: Daniel Koch
  • Patent number: 7679466
    Abstract: Disclosed herein is a timing device that includes a resonator device to generate a resonator output signal at a frequency offset from a desired frequency, a counter configured to generate an extraction signal in accordance with the frequency offset, and a timing signal generator configured to track time with a count based on the resonator output signal and modified by the extraction signal downward to reach the desired frequency.
    Type: Grant
    Filed: March 3, 2008
    Date of Patent: March 16, 2010
    Assignee: Discera, Inc.
    Inventors: Kenneth R. Cioffi, Michael Simoneau, Didier Lacroix, Wan-Thai Hsu
  • Patent number: 7668041
    Abstract: A system for acquiring logging data comprises a controller for causing the generation of a signal in a formation surrounding a wellbore. The controller has a first clock for time-stamping a record of the generated signal. A receiver is deployed in the wellbore and is adapted for detecting the signal. A second clock comprises a double-oven surrounding a crystal oscillator. A controller is operatively coupled to the double-oven to maintain the crystal oscillator temperature substantially at the crystal oscillator turnover temperature. The second clock is synchronized with the first clock before deployment in the wellbore, and the receiver references the second clock in order to record a time-stamp associated with the detected signal.
    Type: Grant
    Filed: November 2, 2005
    Date of Patent: February 23, 2010
    Assignee: Baker Hughes Incorporated
    Inventors: Otto N. Fanini, James C. Jackson
  • Patent number: 7660201
    Abstract: A method, apparatus and system for acquiring land seismic data includes acquiring seismic data with a first autonomous seismic data acquisition unit and a second autonomous seismic data acquisition unit wherein each acquisition unit comprises a plurality of digitally controlled temperature-compensated crystal oscillators. Oscillator-based timing signals are acquired that are associated with the plurality of digitally controlled temperature-compensated crystal oscillators and a time correction is determined to apply to the seismic data acquired with the first autonomous seismic data acquisition unit. The time correction is determined using the oscillator-based timing signals from the first and second autonomous seismic data acquisition units.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: February 9, 2010
    Assignee: Autoseis, Inc.
    Inventors: Thomas J. Fleure, Larry Walker
  • Patent number: 7652545
    Abstract: A system for real time clock (RTC) calibration includes: a timer counter; a clock generator; and a clock calibration unit coupled between the clock generator and the timer counter. The clock calibration unit receives calibration parameters comprising an average calibration value, a remainder calibration value and a calibration period, counts a plurality of clock cycles generated by the clock generator, calibrates a number of the counted clock cycles according to the average calibration value and remainder calibration value in the calibration period, and increments the timer counter by one second when a predetermined number of clock cycles have been reached.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: January 26, 2010
    Assignee: Mediatek Inc.
    Inventors: Tzung-Shian Yang, Chih-Wei Ko
  • Publication number: 20090257320
    Abstract: An electronic apparatus comprises a display portion and at least one oscillating circuit comprising an amplifier, at least one resistor, a plurality of capacitors, and a unit having a case and a resonator. The resonator is vibratable in a flexural mode and has first and second vibrational arms, and at least one groove is formed in at least one of opposite main surfaces of each of the first and second vibrational arms, and at least one mounting arm protrudes from the base portion and extends in a common direction with at least one of the first and second vibrational arms. An output signal of the at least one oscillating circuit comprising the resonator is a clock signal for use in operation of the electronic apparatus to display time information at the display portion.
    Type: Application
    Filed: January 17, 2008
    Publication date: October 15, 2009
    Inventor: Hirofumi Kawashima
  • Patent number: 7583565
    Abstract: To be able to promote oscillation start characteristic while having a simple constitution and maintaining low power consumption. In starting to oscillate an oscillation circuit, a capacitor for protecting from leakage is shortcircuited by bringing a switch of an oscillation stabilizing circuit 11 into a closed state and a constant voltage circuit starts to oscillate the oscillation circuit by supplying a drive voltage of a power source voltage to the oscillation circuit. After an elapse of a predetermined time period, oscillation is prevented from being stopped by leakage by inserting the capacitor into the oscillation circuit loop by bringing the switch into an open state, and an oscillation operation is continued by supplying a voltage lower than the power source voltage to the oscillation circuit by intermittently driving the constant voltage circuit.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: September 1, 2009
    Assignee: Seiko Instruments, Inc.
    Inventors: Kenji Ogasawara, Yoshihiro Shibuya
  • Patent number: 7472032
    Abstract: A sensor array made up of 2n piezoelectric oscillators (preferably paired quartz oscillators) is provided in which n equals the number of axes of interest and each one of the pairs of oscillators has a principle axis directed oppositely from the other of its pair. A controller which preferably includes a microprocessor, makes use of the dynamic relationships of the sensors in the array to adaptively assess the magnitude of weighting factors needed to correct the output signal from each oscillator for environmental and systematic effects to provide optimum frequency and phase output for computing position, velocity, and acceleration. Preferably, a seventh reference oscillator is provided in the center of the array which is canted relative to each of the three orthogonal axes by 45°. This adaptive sensor array is capable of determining position within one meter along any of the x, y, and z axes without the need for any external (e.g., GPS) signal.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: December 30, 2008
    Assignee: Allan Space-Time Solutions, LLC
    Inventors: David W Allan, John A Kusters, Gus R German
  • Patent number: 7046584
    Abstract: A compensated ensemble crystal oscillator clock system for use in a well borehohe system. The clock system includes preferably four quad compensated clocks, a compensated temperature sensor, and software for processing and correcting system response. Physical fabrication of elements of the quad compensated clocks, the compensated temperature sensor and cooperating software minimized drift in frequency of the oscillator clock system in harsh borehole environments encountered while drilling a borehole. The clock system exhibits a frequency stability of 2.8×10?9 or less over a temperature range of from 0° C. to 185° C. The compensated ensemble crystal oscillator clock system is particularly applicable to seismic-while-drilling operations wherein precise downhole measurements of time are required typically over a period of days.
    Type: Grant
    Filed: July 9, 2003
    Date of Patent: May 16, 2006
    Assignee: Precision Drilling Technology Services Group Inc.
    Inventors: Martin Sorrells, James Minto
  • Patent number: 6696899
    Abstract: There is disclosed a differential oscillator circuit including first (10) and second (20) branches each including the series arrangement, between high (VDD) and low (VSS) supply potentials, of a first transistor (4, 5), a first current source (2, 3) and resistor means (8, 9, 18, 19; 18*, 19*). The first transistors are interconnected so as to form a crossed pair of transistors, the most positive current terminal of each transistor (on the “drain” side) being connected to the control terminal of the other transistor of the crossed pair. This differential oscillator circuit further includes an electro-mechanical resonator (6) connected to the crossed transistor pair on the “drain” side, as well as a capacitive element (7) connected to the crossed transistor pair on the “source” side. Advantageously, for high frequency applications, the electro-mechanical resonator can be of the bulk acoustic wave type.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: February 24, 2004
    Assignee: CSEM, Centre Suisse d'Electronique et de Microtechnique sa Recherche et Development
    Inventor: David Ruffieux
  • Patent number: 6147564
    Abstract: An oscillation circuit including an electrostatic protective circuit connected between a signal path and this constant voltage V.sub.reg. It comprises a first electrostatic protective circuit portion that causes any electrostatic voltage of a first polarity that invades the signal path to be selectively diverted through a diode to the constant voltage V.sub.reg side of the circuit, and any electrostatic voltage of a second polarity that invades the signal path to be selectively diverted through another diode to the ground side. This ensures that the oscillation circuit is not affected by fluctuations in the power voltage from the main power source, enabling it to oscillate at a stable frequency.
    Type: Grant
    Filed: March 4, 1999
    Date of Patent: November 14, 2000
    Assignee: Seiko Epson Corporation
    Inventors: Shinji Nakamiya, Hiroshi Yabe, Tadao Kadowaki, Yoshiki Makiuchi
  • Patent number: 5929715
    Abstract: An oscillation circuit is driven at reduced power by a constant voltage V.sub.reg having an absolute value that is lower than that of a power voltage V.sub.ss of a main power source. An electrostatic protective circuit provided in this oscillation circuit is connected between a signal path and this constant voltage V.sub.reg. It comprises a first electrostatic protective circuit portion that causes any electrostatic voltage of a first polarity that invades the signal path to be selectively diverted through a diode to the constant voltage V.sub.reg side of the circuit, and any electrostatic voltage of a second polarity that invades the signal path to be selectively diverted through another diode to the ground side. This ensures that the oscillation circuit is not affected by fluctuations in the power voltage from the main power source, enabling it to oscillate at a stable frequency.
    Type: Grant
    Filed: December 3, 1997
    Date of Patent: July 27, 1999
    Inventors: Shinji Nakamiya, Hiroshi Yabe, Tadao Kadowaki, Yoshiki Makiuchi
  • Patent number: 5325074
    Abstract: A microcomputer in which an oscillating circuit provided therein is activated both when the microcomputer is in an activated state and when it is in a disabled state is provided with a changeover circuit for changing over a supply voltage of the oscillating circuit between when the microcomputer is in the activated state and in the disabled state. The changeover circuit supplies to the oscillating circuit a high voltage when the microcomputer is in the activated state and a low voltage when the microcomputer is in the disabled state. As a result, the starting characteristic when the power is turned on is not deteriorated. Further, the power consumption of the oscillating circuit when the microcomputer is in the disabled state is reduced.
    Type: Grant
    Filed: October 29, 1992
    Date of Patent: June 28, 1994
    Assignee: Rohm Co., Ltd.
    Inventor: Yoshiaki Suenaga
  • Patent number: 5267379
    Abstract: A crystal controlled clock oscillator resin encapsulated in a surface mount device (SMD) package incorporates on a lead frame a crystal oscillator, an integrated circuit, a power supply filter capacitor and, optionally, a feedback resistor. In the fabrication of the device, resin is injected at a position and in a direction relative to the components so as to minimize disturbance of the lead frame and the components mounted thereon.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: December 7, 1993
    Assignee: AVX Corporation
    Inventor: Hoklay Pak
  • Patent number: 5218694
    Abstract: A dual selection system for a reference frequency for use in a clock comprising a microcomputer for controlling the whole system and outputting a switching signal and frequency-demultiplying signals. A system oscillator produces an oscillation signal of 4.194304 MHz. A system frequency-demultiplier for frequency-dividing an output of a first buffer to apply a system clock signal to the microcomputer. A clock oscillator produces an oscillation signal of 32.768 KHz, and a clock frequency-demultiplier for frequency-dividing an output of a second buffer applies a clock signal of 1 Hz for clock to the microcomputer.When an option is selected, a system oscillation signal of 4.194304 MHz is selected and frequency-demultiplied by 2.sup.22 to a clock signal of 1 Hz for a clock. When that the option is not selected, the clock oscillation signal of 32.768 KHz is frequency-divided by 2.sup.15 to a clock signal of 1 Hz for the clock.
    Type: Grant
    Filed: July 29, 1991
    Date of Patent: June 8, 1993
    Assignee: Goldstar Co., Ltd.
    Inventor: Byung H. Lee
  • Patent number: 5172349
    Abstract: The timepiece of this invention comprises an electromagnetic motor (100) the stator (2) of which is flat and at least partially covered by a reinforcement plate (68) of non-magnetic material or, if need be, of very low magnetic permeability which has been attached to it, preferably by welding, prior to subjecting it in bulk along with others, to reheating thereby to protect it during such operation against the risk of deformation or breakage which would render it thereafter unusable. In conformity with the invention and to avoid such plate becoming a useless extra part taking up space in the timepiece, it includes means which enable it to form at the same time another element of the timepiece. Such element may be for instance a trigger piece jumper spring (72) which cooperates with a trigger piece (212) in order to define stable positions of a manual control stem (184) which may be axially displaced.
    Type: Grant
    Filed: January 13, 1992
    Date of Patent: December 15, 1992
    Assignee: ETA SA Fabriques d'Ebauches
    Inventors: Andre Triponez, Jean-Philippe Rebeaud
  • Patent number: 4680514
    Abstract: The present invention relates to a motor for driving a clockwork. A rotatably supported rotor 1 has diametrically opposite permanent-magnet poles. A multi-phase coil arrangement is furthermore present to produce a magnetic field which deflects the rotor 1 out of its instantaneous position as a function of control signals present in each case on the coils 3 and 4 of the coil arrangement.The coil arrangement has a plurality of coils 3 and 4 arranged at an equiangular distance apart, surrounding the rotor 1, which coils can be controlled one after the other by sine voltages which are staggered a given angle apart.
    Type: Grant
    Filed: May 16, 1985
    Date of Patent: July 14, 1987
    Assignee: VDO Adolf Schindling AG
    Inventor: Roland Sudler
  • Patent number: 4644445
    Abstract: This invention describes an improved resin mounting structure for use with an integrated circuit. An integrated circuit chip is affixed to a circuit substrate which has a hole. Circuit patterns connect to the contact pads of the integrated circuit chip and are added along the circuit substrate. An epoxy resin material is gated through the hole to surround and enclose the integrated circuit chip. In this invention, circuit patterns which are added beneath the integrated circuit chip are positioned over the hole in the substrate to allow an unimpeded flow of resin material. In addition, conductive spacing pegs are provided at each integrated circuit contact pad to allow for a uniform spacing between the integrated circuit and the circuit substrate and to provide for a more electrically and mechanically secure connection between the IC chip and the circuit substrate. Also, the circuit substrate is formed from a flexible material to absorb the displacement caused by differential thermal expansion.
    Type: Grant
    Filed: July 31, 1986
    Date of Patent: February 17, 1987
    Assignee: Seiko Epson Kabushiki Kaisha
    Inventor: Kunio Sakuma
  • Patent number: 4641109
    Abstract: A CMOS crystal controlled oscillator includes a CMOS inverter composed of series connected MOS FETs and a crystal connected between signal input an output nodes of the inverter. First and second capacitors are respectively connected between the signal input and output nodes of the inverter and a feedback resistor is connected between the signal input and output nodes of the inverter. A first current limiting circuit is connected between a MOS FET of the inverter and a power source potential and a second limiting circuit is connected between another MOS FET of the inverter and a ground potential. A control register is provided for controlling the first and second current limiting circuits based on data contained within an internal data bus.
    Type: Grant
    Filed: December 11, 1985
    Date of Patent: February 3, 1987
    Assignee: OKI Electric Industry Co., Ltd.
    Inventor: Yokouchi Hiroshi
  • Patent number: 4618837
    Abstract: A reference pulse generator comprises a quartz crystal oscillator, a frequency divider connected to the oscillator for frequency dividing the oscillator output, and a constant current generator connected in series both with the oscillator and the frequency divider to control the current applied to the oscillator from a power source. The constant current generator comprises a current limiting element, such as a MOSFET, which is controlled by a reference voltage produced by a reference voltage generator.
    Type: Grant
    Filed: June 29, 1982
    Date of Patent: October 21, 1986
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventor: Yoshiaki Matsuura
  • Patent number: 4600898
    Abstract: A one-pin crystal oscillator 20 is designed to be used as a clock generator for digital integrated circuits. Unlike the prior art, this oscillator requires only one package pin to connect the crystal as opposed to the usual two pin requirement and, except for the crystal, can be completely fabricated on a chip so as to require no other external components.
    Type: Grant
    Filed: March 26, 1984
    Date of Patent: July 15, 1986
    Assignee: The Regents of the University of California
    Inventors: Joseph T. Santos, Robert G. Meyer
  • Patent number: 4459565
    Abstract: A low current electronic oscillator system includes an oscillator tuning element, such as a piezoelectric crystal, operable at a predetermined frequency and an oscillator control circuit for cooperating with the tuning element to provide an oscillating electrical signal at the predetermined frequency. The control circuit includes first and second electrical charge storage devices coupled to a first portion of the tuning element; a first current drive device connectable to a first terminal of an applied electric potential and responsive to a first voltage on the first charge storage device for applying a first drive current to a second portion of the tuning element; and a second current drive device connectable to a second terminal of the electric potential and responsive to a second voltage on the second charge storage device for applying a second drive current to the second portion of the tuning element.
    Type: Grant
    Filed: September 13, 1982
    Date of Patent: July 10, 1984
    Assignee: Texas Instruments Incorporated
    Inventor: Jerald G. Leach
  • Patent number: 4427302
    Abstract: A timekeeping signal source for an electronic timepiece produces a highly accurate timekeeping signal which is stable in frequency with respect to both temperature variations and long-term drift. The timekeeping signal is produced by phase lock control using a high frequency reference signal from a crystal-controlled high-frequency oscillator. Phase lock control can be performed continuously or on an intermittent basis, in order to reduce power consumption. In addition, the timekeeping rate can be adjusted with a resolution within one period of the high frequency reference signal, by variation of a numeric value stored in digital memory means.
    Type: Grant
    Filed: June 1, 1981
    Date of Patent: January 24, 1984
    Assignee: Citizen Watch Company Limited
    Inventor: Shinichi Watanabe
  • Patent number: 4405906
    Abstract: A C-MOS oscillator circuit having input and output terminals adapted to be connected to a resonator and two active MOS transistors of complementary types connected in series between the supply terminals of the circuit, which supply terminals are connected to the positive and negative poles of a source of d.c. voltage, the sources of the transistors being connected to a supply terminal and the drains being connected to the output terminal. The d.c. bias and the a.c. voltage control of each of the active transistors are ensured by a MOS transistor of the same type connected as a diode between its gate and its drain, a current source connected between its gate and the supply terminal to which the source of the other active transistor is connected, and a capacitive voltage divider which is connected between the supply terminal, to which its source is connected, and the input terminal, and the intermediate point of which is connected to its gate.
    Type: Grant
    Filed: July 10, 1981
    Date of Patent: September 20, 1983
    Assignee: Asulab S.A.
    Inventor: Jakob Luscher
  • Patent number: 4387350
    Abstract: A watch circuit arrangement for conserving battery power includes a feedback connection between the crystal oscillator of the watch circuit and the display voltage generator which is responsive to the crystal oscillator output to develop sufficient output voltage for the watch display. Specifically, the output of the display voltage generator, which may be a voltage multiplier, is sensed by a display voltage sensing circuit which controls the gain of the crystal oscillator. Initially, when battery power is applied to the watch circuit, the voltage multiplier has zero output voltage, which conditions the crystal oscillator to have a sufficiently high gain to start the oscillator. After several cycles of oscillator signal, the voltage multiplier output increases, which conditions the crystal oscillator to have a lower gain for reducing power consumption while sustaining oscillation.
    Type: Grant
    Filed: December 24, 1980
    Date of Patent: June 7, 1983
    Assignee: RCA Corporation
    Inventors: Jeffrey M. Bessolo, James E. Gillberg
  • Patent number: 4387349
    Abstract: A two transistor CMOS inverter has the two transistor gates coupled together by a coupling capacitor. D-C gate bias is supplied to each transistor through high value resistors. The P-channel transistor is biased one threshold below V.sub.DD and the N-channel transistor is biased one threshold above ground. The biasing voltages are developed through the use of a current mirror so that the biasing is independent of processing variables and temperature. This form of biasing renders the circuit class B regardless of the source to drain voltage and ensures low current operation. A crystal oscillator created using such an inverter and biasing will operate at voltages substantially below sum of P and N thresholds and at a current level about one-fifth of that of a conventional CMOS oscillator.
    Type: Grant
    Filed: December 15, 1980
    Date of Patent: June 7, 1983
    Assignee: National Semiconductor Corporation
    Inventor: A. Karl Rapp
  • Patent number: 4360789
    Abstract: A very low current Pierce oscillator has two pairs of complementary field-effect transistors (FET's) and a two-terminal quartz crystal. The gates of the first complementary FET pair are coupled through individual capacitors to one terminal of the quartz crystal, their drains being connected together and to the other quartz crystal terminal. Current flow through the crystal oscillator is minimized by a novel oscillator bias loop connected between the gates of the first FET pair. Amplification is provided by the second FET pair which have a commonly connected drain comprising the oscillator output node. The gates of the second FET pair are each connected to a respective one of the gates of the first FET pair. The oscillator bias loop minimizes the source-to-drain current through the first FET pair by reducing the P-channel FET gate voltage in response to the source-to-drain current.
    Type: Grant
    Filed: July 17, 1980
    Date of Patent: November 23, 1982
    Assignee: Hughes Aircraft Company
    Inventors: Lanny L. Lewyn, Charles H. Lucas
  • Patent number: 4358839
    Abstract: An absolute digital clock system which is capable of counting absolute time despite the disruptive effects of a nuclear event, or other disturbance, on the electronic circuitry of the system. The clock system of the invention includes a master quartz crystal oscillator stage, and a string of counter stages connected thereto each including a binary counter for counting down from the frequency of the preceding stage to a lower frequency, and each including a crystal oscillator phase-locked with the binary counter and producing a signal at the lower frequency.
    Type: Grant
    Filed: May 1, 1979
    Date of Patent: November 9, 1982
    Assignee: The Singer Company
    Inventor: Ernest C. Wittke
  • Patent number: 4346350
    Abstract: A quartz crystal oscillator for a timepiece including a complementary field effect transistor (FET) pair, wherein one field effect transistor is constant current-biased and the other field effect transistor is self-biased, with high impedance negative feed back loop circuit. The gates of the field effect transistor pair are AC coupled by a condenser, and the drains of the field effect transistor pair are connected to cooperate for AC amplification. The constant current-biased field effect transistor assures a low constant mean current and low start voltage for the oscillator, and the self-biased field effect transistor assures a sure amplifying operation. The AC coupling of the gates assures a high amplification factor and high efficency in excitation of a quartz crystal resonator of an oscillator, whereby the constitution of this invention is simple and easy to form in a monolithic IC chip for a timepiece.
    Type: Grant
    Filed: January 29, 1980
    Date of Patent: August 24, 1982
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Shigeru Morokawa, Ryoji Iwakura
  • Patent number: 4325036
    Abstract: Temperature compensating circuit for an electronic timepiece having two piezo electric resonators having different frequency-temperature characteristics.Two piezo electric resonators are a major resonator having smaller frequency variation rate in temperature variation and a subsidiary resonator having larger frequency variation rate in temperature variation.And also the temperature compensating circuit includes a variable counter for counting the output signal of the major oscillator having the major resonator, a gate time setting circuit controlled by both the outputs of subsidiary and the variable counter, and a counter for counting the output signal of the major oscillator.As a result, the temperature compensating circuit is able to improve the accuracy of the timepiece.
    Type: Grant
    Filed: May 23, 1980
    Date of Patent: April 13, 1982
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventor: Tsuneo Kuwabara
  • Patent number: 4321562
    Abstract: A single-stage inverter forming a closed loop together with a crystal resonator fails to provide sufficient gain and hence, power consumption becomes high during stable oscillation. If inverters are coupled together in a three-stage cascade-connection, on the other hand, the gain becomes excessively high and undesired high frequency oscillation takes place at the start of oscillation. This invention provides a crystal oscillator circuit which, in order to solve these problems, uses a single-stage inverter to form a closed loop with a crystal resonator at the start of oscillation and uses three-stage inverters cascade-connected with each other during stable oscillation.
    Type: Grant
    Filed: January 9, 1980
    Date of Patent: March 23, 1982
    Assignee: Nippon Electric Co., Ltd.
    Inventor: Hatsuhide Igarashi
  • Patent number: 4307354
    Abstract: An improved oscillator circuit utilizes an inverter which includes a pair of series connected MOS-FETs of differing conductivity types. A switching circuit is operable to supply the gate bias voltages from one of two separate sources, one of which is used during periods of start-up or unstable oscillation to decrease start-up time, and the other of which is used during periods of stable oscillation to decrease current consumption.
    Type: Grant
    Filed: August 21, 1979
    Date of Patent: December 22, 1981
    Assignee: Nippon Electric Co., Ltd.
    Inventors: Youichi Miyagawa, Hiroshi Iguchi, Jiroh Shimada
  • Patent number: 4242611
    Abstract: Improved clocks and frequency standards are provided through the use of single crystals having a mass of the order of kilograms maintained at temperatures of the orders of few degrees Kelvin which are caused to vibrate freely at low modes of resonant vibration. The frequency stability of such vibrations is ultra-stable over long periods of time and provide frequency standards and clocks having stability orders of magnitude greater than clocks and standards based upon quartz crystal oscillators and equal or better than standards and clocks based upon atomic beams (cesium, rubidium and hydrogen masers).
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: December 30, 1980
    Assignee: The University of Rochester
    Inventor: David H. Douglass
  • Patent number: 4219754
    Abstract: In an electronic wristwatch having a watch body an a plurality of electronic vibrators having frequency-position characteristics, the frequency-temperature characteristic of the standard signal generated thereby is improved by positioning the vibrators in the watch body so that at least one vibrator has a different frequency-position characteristic than the other vibrators to compensate for any frequency deviation thereof due to the orientation of the watch body.
    Type: Grant
    Filed: August 11, 1978
    Date of Patent: August 26, 1980
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventors: Hideo Hoshi, Shiro Mitsugi
  • Patent number: RE31402
    Abstract: An electronic timepiece which includes a time .[.reference.]. .Iadd.base .Iaddend.signal generator, which generates a signal which is used to count time, and is compensated in its frequency in order to have the predetermined frequency value regardless of variations in ambient temperature.
    Type: Grant
    Filed: September 6, 1978
    Date of Patent: October 4, 1983
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Yukio Hashimoto, Shigeru Morokawa