Pulse Transforming Means Patents (Class 368/217)
  • Patent number: 6946813
    Abstract: A step motor control device detects a rotational driving state of a step motor. In a first detection period immediately after termination of the rotational driving state of the step motor, selected switch elements are controlled so that a first detection signal is obtained. If the step motor is not in a rotational driving state, the first detection signal is suppressed to a low voltage that is equal to or lower than a threshold value. In a second detection period immediately after lapse of the first detection period, selected switch elements are controlled so that a second detection signal of high and stable voltage is obtained in accordance with the rotational driving state of the step motor.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: September 20, 2005
    Assignee: Seiko Instruments Inc.
    Inventor: Saburo Manaka
  • Patent number: 6914407
    Abstract: A control device detects a rotational driving state of a step motor having a coil. First and second switch elements are connected to each other in series, and a node of the first and second switch elements are connected to one side of the coil during use of the control device. Third and fourth switch elements are connected to each other in series, and a node of the third and fourth switch elements are connected to the other side of the coil during use of the control device. A first series circuit has a fifth switch element connected in parallel with the first switch element. A second series circuit has a sixth switch element connected in parallel with the third switch element. A control section controls an on/off operation of the third switch element at a given frequency after a given period has elapsed in a state where the fourth and fifth switch elements are turned on.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: July 5, 2005
    Assignee: Seiko Instruments Inc.
    Inventor: Saburo Manaka
  • Patent number: 6736525
    Abstract: A tubular light includes a light set having a substrate with light emitting diodes mounted on the substrate so as to electrically connect to the substrate, a tubular cover made of a translucent material, the tubular cover having a receiving space defined therein, a positioning seat formed to securely receiving the substrate in the receiving space, and a securing device securely engaged with the tubular cover and adapted to securely engage to a surface.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: May 18, 2004
    Assignee: Unity Opto Technology Co., Ltd.
    Inventor: Yuan-Cheng Chin
  • Patent number: 6137252
    Abstract: A power-saving controller for controlling a stepping motor mounted in an electronic wristwatch. A pulse signal generator in the controller combines two pulse signals GPi and GPi+2 having different duty factors using a compositing signal CP, based on a reference signal BP, thereby compositing a pulse signal GPi+1 having an intermediate duty factor. Even if the frequency of the reference signal BP is lowered, a step size for controlling the duty factor of a drive pulse is prevented from expanding, thereby keeping the driving power required by the stepping motor from increasing. The lowering of the frequency of the reference signal BP reduces the power consumption of the circuit of the wristwatch, and thus of the controller.
    Type: Grant
    Filed: November 4, 1998
    Date of Patent: October 24, 2000
    Assignee: Seiko Epson Corporation
    Inventors: Hiroyuki Kojima, Hiroshi Yabe
  • Patent number: 6034502
    Abstract: The invention concerns a method for controlling a continuous rotation miniature motor including a rotor carrying permanent magnets and a stator carrying at least one coil in which an alternating induced voltage is generated when the rotor rotates, this method consisting in maintaining the rotation of said rotor by successive pulses (102) supplied, in respective half periods of the induced voltage (U.sub.i), before the induced voltage reaches a maximum absolute value in each of these half periods. In particular, the time interval (t.sub.1) between a passage through zero of the induced voltage and the beginning of a maintenance pulse (102), provided in the half period following said passage through zero, is constant.
    Type: Grant
    Filed: June 16, 1998
    Date of Patent: March 7, 2000
    Assignee: Asulab S.A.
    Inventor: Roger Buhler
  • Patent number: 5504408
    Abstract: The method is designed to supply the motor with chopped voltage pulses of varying durations as a function of the load conditions and of the supply voltage. The chopped voltage pulse is composed of a plurality of partial pulses of predetermined durations T1, T2, and T3. The feeding circuit comprises a detector of a condition of extreme load defined by k1.multidot.T4<k2.multidot.T5, wherein k1 and k2 are constants, T4 is an interval separating T1 and T2, and T5 is an interval separating T2 and the first pulse T3.
    Type: Grant
    Filed: February 28, 1995
    Date of Patent: April 2, 1996
    Assignee: Detra SA
    Inventors: Mai X. Tu, Michel Schwab
  • Patent number: 4599005
    Abstract: A step motor driving control mechanism for use in an electronic timepiece for reducing the current consumption thereof is provided. Load detection circuitry detects the load condition of the step motor and selectively produces a load condition signal representative of a predetermined load condition thereof. Driving and control circuitry is provided for receiving a low frequency timekeeping signal produced by a divider circuit and a load detection signal when same is selectively produced by the load detection circuitry. In response to the presence or absence of a load detection signal applied thereto, the drive and control circuitry is adapted to vary the duration of the pulse width of a drive signal applied to the step motor to effect a driving of same.
    Type: Grant
    Filed: June 10, 1985
    Date of Patent: July 8, 1986
    Assignee: Seiko Epson Corporation
    Inventors: Yoshikazu Kawamura, Minoru Hosokawa, Sakiho Okazaki, Hiroshi Ishii
  • Patent number: 4522507
    Abstract: A step motor driving control mechanism for use in an electronic timepiece for reducing the current consumption thereof is provided. Load detection circuitry detects the load condition of the step motor and selectively produces a load condition signal representative of a predetermined load condition thereof. Driving and control circuitry is provided for receiving a low frequency timekeeping signal produced by a divider circuit and a load detection signal when same is selectively produced by the load detection circuitry. In response to the presence or absence of a load detection signal applied thereto, the drive and control circuitry is adapted to vary the duration of the pulse width of a drive signal applied to the step motor to effect a driving of same.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: June 11, 1985
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventors: Yoshikazu Kawamura, Minoru Hosokawa, Sakiho Okazaki, Hiroshi Ishii
  • Patent number: 4437769
    Abstract: An electronic timepiece having a stepping motor includes a power source, an oscillating circuit, a dividing circuit connected to the oscillating circuit, and a wave shaping circuit receptive of a plurality of output signals produced from the dividing circuit to produce a plurality of controlling signals. A controlling circuit receives the controlling signals and controls a driving circuit. The power source is connected to a detecting voltage circuit by which the variation of the supply voltage of the power source is detected, and a normal waveform or an intermittent waveform is selectively applied to the stepping motor according to the variation of the supply voltage. As a result, the power consumption of the steppng motor is controlled at a constant level, even if the supply voltage of the power source is higher than the optimum voltage of the stepping motor and even if the supply voltage varies.
    Type: Grant
    Filed: July 10, 1980
    Date of Patent: March 20, 1984
    Assignee: Seiko Instruments & Electronics Ltd.
    Inventors: Masaharu Shida, Makoto Ueda, Shuji Otawa, Masaaki Mandai, Katsuhiko Sato
  • Patent number: 4433401
    Abstract: An electronic timepiece comprising a power source, an electronic circuit, a stepping motor, and a detecting device for detecting a rotor movement after the stepping motor is driven. The electronic circuit includes a power source voltage detecting circuit and driving power controlling device which intermits driving pulses of the stepping motor according to an output of the voltage detecting circuit so that the driving force is substantially constant and the power consumption is decreased.
    Type: Grant
    Filed: July 10, 1980
    Date of Patent: February 21, 1984
    Assignee: Seiko Instruments & Electronics Ltd.
    Inventors: Masaharu Shida, Makoto Ueda
  • Patent number: 4400093
    Abstract: In order to determine the adjustment precision .DELTA.T of a timepiece provided with an oscillator (1) and an adjustable frequency divider chain (3-18; 18-20) on which an adjustment unit (15) acts, initially the real period TQ of the oscillator is measured with the adjustment unit disconnected following a first actuation of a time setting circuit (21). A second actuation of said circuit then effects running of the display at a rate n times above the normal and the adjustment unit is connected. Following a time T/n representing the adjustment cycle the period TQ is measured as corrected by the amount n.DELTA.T, thus TQ+n.DELTA.T. The first measured value obtained is subtracted from the second thus giving n.DELTA.T which when divided by n gives the adjustment precision .DELTA.T.
    Type: Grant
    Filed: July 1, 1982
    Date of Patent: August 23, 1983
    Assignee: OMEGA Louis Brandt & Frere S.A.
    Inventor: Jean-Pierre Jaunin
  • Patent number: 4370065
    Abstract: A step motor driving control mechanism for use in an electronic timepiece for reducing the current consumption thereof is provided. Load detection circuitry detects the load condition of the step motor and selectively produces a load condition signal representative of a predetermined load condition thereof. Driving and control circuitry is provided for receiving a low frequency timekeeping signal produced by a divider circuit and a load detection signal when same is selectively produced by the load detection circuitry. In response to the presence or absence of a load detection signal applied thereto, the drive and control circuitry is adapted to vary the duration of the pulse width of a drive signal applied to the step motor to effect a driving of same.
    Type: Grant
    Filed: March 24, 1980
    Date of Patent: January 25, 1983
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventors: Yoshikazu Kawamura, Minoru Hosokawa, Sakiho Okazaki, Hiroshi Ishii
  • Patent number: 4368990
    Abstract: An analog electronic timepiece has a stepping motor for rotationally driving the timepiece hands. The motor is driven by normal driving pulses during normal load conditions and in the event the normal driving pulses are unable to effect rotation of the motor, correction driving pulses of longer pulse width than the normal driving pulses are used. A detection circuit detects whether or not the motor has rotated by switching a resistance element in series with the motor drive coil after the application of each normal driving pulse. Rotation and non-rotation of the motor is determined by measuring the voltage across the resistance element and comparing the measured voltage with a reference voltage.
    Type: Grant
    Filed: March 10, 1980
    Date of Patent: January 18, 1983
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventors: Makoto Ueda, Masaharu Shida, Akira Torisawa
  • Patent number: 4361410
    Abstract: In a circuit for driving a pulse motor of an electronic timepiece, the initial part or entirety of each drive pulse is modulated to form a group of high frequency pulses thereby reducing an initial surge of current while rotor of motor is still stationary. Modulation can be controlled according to load placed on motor to provide increased drive energy for heavy loading.
    Type: Grant
    Filed: June 11, 1980
    Date of Patent: November 30, 1982
    Assignee: Citizen Watch Company Ltd.
    Inventors: Fumio Nakajima, Takayasu Machida, Kenji Yamada
  • 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: 4346463
    Abstract: A feed arrangement enabling detection of the movement of a stepping motor d providing such motor with a series of long duration pulses in the event of failure to step responsive to a short duration pulse. The detector comprises means for sampling a first signal developed by the current in the motor winding and generating a second signal which is the integral of the first, in order to detect whether or not the motor has stepped. The invention is intended for use with micromotors as found in timepieces.
    Type: Grant
    Filed: June 23, 1980
    Date of Patent: August 24, 1982
    Assignee: Societe Suisse pour l'Industrie Horlogere Management Services S.A.
    Inventors: Mai Tu Xuan, Marcel Jufer, Andre Pittet
  • Patent number: 4312059
    Abstract: In an electronic timepiece, a motor is driven by a pulse having a shorter pulse width than the conventional driving pulse and afterwards, a detection pulse is applied to the motor coil so as to determine rotation of the rotor. If the rotor fails to rotate a correction is effected by driving the motor by a pulse having a pulse width greater than the normal driving pulse.
    Type: Grant
    Filed: April 20, 1978
    Date of Patent: January 19, 1982
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventors: Masaaki Mandai, Akira Torisawa, Makoto Ueda, Kazuhiro Asano, Masaharu Shida, Katsuhiko Satoh
  • Patent number: 4300223
    Abstract: The present invention concerns a time-piece comprising a system for detecting the non-rotation of a stepping motor and for making-up lost steps.The detection system comprises a device for measuring the current delivered to the motor, the logic level of the measured signal being used for controlling a correction circuit delivering additional pulses to the stepping motor. The measuring device comprises a short duration measuring pulse generator, a reference signal source, and a comparator having an output which controls the correction circuit.
    Type: Grant
    Filed: December 13, 1978
    Date of Patent: November 10, 1981
    Assignee: Ebauches Electroniques SA
    Inventor: Bernard Maire
  • Patent number: 4283784
    Abstract: An integrated circuit watch which employs a RAM and PLA to execute its timekeeping functions can be significantly improved to include a multiplicity of zones without entailing greater complexity of circuitry or large amounts of chip space and may incorporate user programmability by incorporation of the present invention. The number of independent and distinct watch functions within the integrated circuit watch can be increased by coupling a flag RAM to the main PLA. The flag bits, which are associated with the counting states of each separate watch function are then accessibily stored within the flag RAM and appropriately coupled to the main PLA to execute the required timekeeping operation at the appropriate time. A processor is coupled to the flag RAM and may selectively process or manipulate each of the flag bits in the flag RAM in response to instructions or control signals, some of which may be user initiated.
    Type: Grant
    Filed: May 9, 1978
    Date of Patent: August 11, 1981
    Assignee: Timex Corporation
    Inventor: Douglas F. Horan
  • Patent number: 4276626
    Abstract: In an electronic watch having an oscillator for producing a time base signal and stepping motor, drive pulses are produced for normally driving the motor under normal load conditions. The rotation and non-rotation of the motor in response to the last drive pulse is detected in response to a detecting pulse, and if non-rotation has been detected, a predetermined plurality of correction pulses are applied to the motor for driving same, the correction pulses being sufficient to drive the motor under a high torque loading. In this way, power consumption is decreased since a high power driving is saved only for high torque loading conditions.
    Type: Grant
    Filed: April 20, 1978
    Date of Patent: June 30, 1981
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventors: Katsuhiko Satoh, Kazuhiro Asano, Masaaki Mandai, Makoto Ueda, Akira Torisawa, Masaharu Shida
  • Patent number: 4272837
    Abstract: An electronic timepiece including a dividing circuit for developing different output pulse signals having different respective pulse repetition rates, a stepping motor and a drive circuit responsive to control signals for driving the stepping motor at a normal rate and for applying a correction pulse to the stepping motor according to the control signals. A pulse combining circuit combines the different output pulse signals from the dividing circuit for generating control signals and for applying the control signals to the drive circuit. The pulse combining circuit normally generates a control signal effective to drive the stepping motor at a normal rate, and the pulse combining circuit is responsive to a correction signal to control the drive circuit to apply a corrective pulse to the stepping motor. A detection circuit detects rotation and non-rotation of the stepping motor rotor and generates a detection voltage signal indicative of the state of rotation of the rotor.
    Type: Grant
    Filed: April 20, 1978
    Date of Patent: June 9, 1981
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventors: Makoto Ueda, Akira Torisawa, Katsuhiko Satoh, Masaharu Shida, Masaaki Mandai, Kazuhiro Asano
  • Patent number: 4271496
    Abstract: An electronic timepiece including a stepping motor and a time-indicating hand moved in a stepwise manner by the stepping motor for indicating time. During normal operation the time-indicating hand moves at a normal periodic rate. When operating conditions such as a low battery cause the stepping motor to not rotate, correcting pulses are applied to the stepping motor to supply additional energy to it to cause it to rotate. Additionally, the correcting pulses cause the rotor, and the time-indicating hand to rotate at a rate different from the normal periodic rate to alert the timepiece user that some condition exists tending to cause non-rotation of the stepping motor.
    Type: Grant
    Filed: April 20, 1978
    Date of Patent: June 2, 1981
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventors: Masaharu Shida, Akira Torisawa, Makoto Ueda, Masaaki Mandai, Katsuhiko Sato, Kazuhiro Asano
  • Patent number: 4270198
    Abstract: An electronic timepiece having a frequency standard, a frequency converter, a control circuit responsive to a low frequency time unit signal to provide first and second output signals, and a driver circuit responsive to the first and second output signals to provide first and second drive signals, which timepiece comprises a reversible electro-mechanical transducer rotatable in a clockwise direction in response to the first drive signal and in a counter-clockwise direction in response to the second drive signal, first and second wheel trains driven by the electro-mechanical transducer independently from each other, and first and second time indicating means actuated by the first and second wheel trains, respectively.
    Type: Grant
    Filed: October 12, 1979
    Date of Patent: May 26, 1981
    Inventors: Munetaka Tamura, Toshikazu Hatuse
  • Patent number: 4267587
    Abstract: An electronic timepiece circuit is provided with an oscillator for producing a reference signal and a frequency dividing circuit which frequency-divides the reference signal from the oscillator to produce a signal with given time intervals. Clock data stored in the memory is read out therefrom by a timing signal corresponding to the output signal from a given stage of the frequency dividing circuit and is loaded into a shift register where it is stored temporarily. The clock data stored in the memory is read out therefrom at given time intervals by a control signal obtained in accordance with the output signal from a given stage of the frequency dividing circuit, and the read out clock data, together with the clock data read out to the shift register, is subjected to a given operation, with the result that the clock data is updated. The updated clock signal is loaded into the memory by a control circuit.
    Type: Grant
    Filed: January 26, 1979
    Date of Patent: May 12, 1981
    Assignee: Casio Computer Co., Ltd.
    Inventors: Mamoru Mizuno, Hanzou Tsuzuki
  • Patent number: 4254491
    Abstract: Electric clock with an oscillator, particularly a quartz oscillator, a frequency divider connected to the quartz oscillator and a control stage connected following the frequency divider, via which control stage a stepping motor, which stepping motor is coupled with the dial train, is able to be applied with pulses of the same or alternating polarity. Each pulse is formed from a number of individual pulses, the pulse duty cycle of the individual pulses reducing toward the end of the first mentioned pulses.
    Type: Grant
    Filed: October 31, 1978
    Date of Patent: March 3, 1981
    Assignee: Quarz-Zeit AG
    Inventors: Martin Haub, Manfred Stein
  • Patent number: 4241433
    Abstract: In an electronic watch a non-operation detecting circuit detects the non-operative condition of the stepping motor of the watch and produces a non-operation signal each time the stepping motor fails to operate in response to the standard pulse which drives the same. A counter counts the number of non-operation signals and stores the count for later use. A rotation detecting circuit detects the resumption of operation of the stepping motor in response to the standard pulse from the non-operative condition and a quick feed control circuit quickly advances the stepping motor in response to an input from the rotation detection circuit by thereafter supplying, instead of the standard pulses, the quick feed pulses to the drive circuit for the motor equal in number to the number of the non-operation signals counted in the counter.
    Type: Grant
    Filed: July 24, 1978
    Date of Patent: December 23, 1980
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventors: Makoto Ueda, Masaharu Shida, Masataka Ikenishi, Joichi Miyazaki, Shozo Kushida, Hiromasa Nakanishi
  • Patent number: 4241434
    Abstract: An electronic timepiece includes a stepping motor having a coil and a rotor. Circuitry is provided for generating and applying alternating pulses to the motor coil to effect forward stepwise rotation of the motor rotor in a forward direction and for generating and applying alternating pulses to the motor coil to effect reverse stepwise rotation of the motor rotor in a reverse direction. The reverse rotation is achieved by sets of three alternating pulses with the first pulse of each set effecting incremental angular movement of the motor rotor in the forward direction followed by the second and third pulses which effect greater icremental angular movement of the motor rotor in the reverse direction to thereby obtain for each pulse set a net angular movement of the motor rotor in the reverse direction.
    Type: Grant
    Filed: June 14, 1978
    Date of Patent: December 23, 1980
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventors: Masaharu Shida, Akira Torisawa, Makoto Ueda
  • Patent number: 4236241
    Abstract: An electronic timepiece includes a frequency supply for providing a relatively high frequency time base signal, a frequency converter responsive to the relatively high frequency time base signal to provide a timing signal, a clock signal, and a time unit signal. A timekeeping circuit is responsive to the time unit signal to provide a time information signal, and at least one of the timing signal, clock signal, and time information signal is chopped into periodic bursts to effect transfer of the at least one of the timing signal, clock signal, and time information signal from one part to another part in the timepiece. The time in response to the time information signal is displayed.
    Type: Grant
    Filed: September 15, 1978
    Date of Patent: November 25, 1980
    Assignee: Citizen Watch Company Limited
    Inventors: Shigeru Morokawa, Fukuo Sekiya, Yukio Hashimoto, Yasushi Nomura, Keiichiro Koga
  • Patent number: 4212156
    Abstract: A step motor driving control mechanism for use in an electronic timepiece for reducing the current consumption thereof is provided. Load detection circuitry detects the load condition of the step motor and selectively produces a load condition signal representative of a predetermined load condition thereof. Driving and control circuitry is provided for receiving a low-frequency timekeeping signal produced by a divider circuit and a load detection signal when same is selectively produced by the load detection circuitry. In response to the presence or absence of a load detection signal applied thereto, the drive and control circuitry is adapted to vary the duration of the pulse width of a drive signal applied to the step motor to effect a driving of same.
    Type: Grant
    Filed: October 6, 1977
    Date of Patent: July 15, 1980
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventors: Yoshikazu Kawamura, Minoru Hosokawa, Sakiho Okazaki, Hiroshi Ishii
  • Patent number: 4206458
    Abstract: A numerical display system for electronic instrument comprises output means capable of displaying or printing a plurality of numbers different in unit or number system, numeric data storage means for supplying numeric data to the output means, and means for controlling the supply of the numeric data stored in the storage means to the output means and for controlling to suppress the output of zero in each of the numbers different in unit or number system contained in the numeric data to be displayed or printed.
    Type: Grant
    Filed: September 29, 1978
    Date of Patent: June 3, 1980
    Assignee: Canon Kabushiki Kaisha
    Inventor: Ichiro Sado
  • Patent number: 4192132
    Abstract: A quartz controlled analog watch with a minute hand indexed once a minute by minute pulses and a seconds hand indexed once every five seconds by weaker pulses occurring at five second intervals between minute pulses.
    Type: Grant
    Filed: May 21, 1979
    Date of Patent: March 11, 1980
    Assignee: Timex Corporation
    Inventors: Adolf Sedlak, Horst Friedrich