Abstract: An electronic digital display timepiece having a locking switch to prevent inadvertent correction of the timepiece, the locking switch being adapted to effect setting of at least one of the digits of time displayed. The electronic timepiece includes a quartz crystal oscillator circuit for producing high frequency time standard signals and a divider circuit including a plurality of divider stages adapted to produce low frequency timekeeping signals in response to said high frequency time standard signals. A display is associated with each of the plurality of divider stages in order to display digits of time in response to the low frequency timekeeping signals counted thereby. The count of certain of the divider stages may be corrected by correction switches provided a locking switch is first displaced from a locking mode to release mode.

Abstract: A technique of synchronizing an oscillating system driven by a mechanical energy storage means, particularly a timepiece having a regulating member which is set and maintained in oscillation by a pulse-like driving moment and which is synchronized by electromechanical action by means of timing pulses derived by division from a quartz oscillation, characterised in that the synchronizing action is achieved through an electromagnetic coupling or electromotively through indirect synchronization, in which a phase and frequency comparison is made between said timing pulses and an alternating voltage signal derived from the movement of the oscillating system, for example of the balance, with the oscillating system of corresponding frequency and phase, while in addition a regulating signal is derived from the comparison and is utilized to produce a torque M.sub.R which through the electromagnetic coupling applies a regulating action to the oscillating system.

Abstract: An electronic timepiece having a quartz crystal oscillator serving as a time standard, a digital display, and integrated divider and driving circuits for dividing the high-frequency signal from the oscillator circuit into low-frequency timing signals for the direct driving of the liquid crystal display. A light source is disposed proximate the liquid crystal display. A single power source is utilized to energize the oscillator circuit and divider circuits, as well as to provide a voltage sufficient to energize the driving circuit, liquid crystal display and light source.

Abstract: An electronic timepiece having a pulse generator for producing a high frequency time standard signal for a first divider circuit producing first low frequency timing signals in response to said time standard signal with logic means controlling said time standard signal in a second divider circuit at programmed times for producing second low frequency time signals, said first low frequency time signals and said second low frequency time signals being connected to comparative means to activate an alarm means when aligned.

Abstract: A holder unit of an electronic watch for holding a battery for the latter in position within the interior space of the casing of the watch, in which a holding member is attached to the watch casing, main portion of the holding member being arranged in a hollow cylinder enclosing with small idle gaps around said battery and mounted in the manner mechanically independent from the driven device.

Abstract: An electronic timepiece including a time-keeping circuit having serially connected counters generating day, hour, minute and second signals; a four digit display connected to the counters; a selecting circuit coupled to the counters and having one mode for the display of two units of real time, and a plurality of other modes for the selection and display of each single unit of time for correction; a first switch connected to the selecting circuit and actuable to sequentially advance the selecting circuit from one mode to another; and a second switch coupled to the selecting circuit and the counters for causing the display of a different two units of real time when the selecting circuit is in the first mode, and for correcting each individually selected unit of time when the selecting circuit is in one of its other modes.

Abstract: An electric organ tone generating system in which each organ tone is generated by an individual independent oscillator with built-in computer means for individually tuning each individual oscillator in turn from a fixed crystal controlled reference oscillator. All the individual oscillators are of identical construction except for the tuning components of the oscillator.

Abstract: A digital indication electronic wristwatch having a liquid crystal display panel driven by the output of a standard oscillator through frequency divider circuitry. Time regulation is provided by means of a first switch for resetting the entire frequency dividing circuit and a second switch for individually resetting that portion of the frequency divider circuit whose output corresponds to a 1-second or 1-minute signal. If desired, further switches may be provided for individually resetting those portions of the frequency divider circuit whose output corresponds respectively to the 10-second, 10-minute or 1-hour signal.

Abstract: A casing for an electronic watch whose movement is powered by one or more miniature battery cells. The casing has a generally rectangular form and a back opening surrounded by a flange. The casing is divided into two sections, one of which is occupied by the movement or electronic module and the other by the power cells. The back of the casing is enclosed by two adjoining hatch pieces, one covering the movement section and the other the power section. The opposing ends of the two hatch pieces are provided with lips which fit under the flange of the casing whereas the adjoining ends of the pieces have complementary grooves formed therein to define a bore for receiving a removable locking pin.

Abstract: In a rotating drum type of digital clock, the minute drum is fixed to the drum shaft. A drive disc is carried on the shaft, freely rotatable thereon, adjacent to the minute drum. Sandwiched between them is a detent ring which is keyed to the drive disc, but which has limited axial freedom with respect to both the disc and the drum, being pressed toward the web of the drum by a spring. Convex detent bosses extending axially from the ring can engage with any of a plurality of recesses in the web of the minute drum. The drive disc is advanced each minute by the normal actuating mechanism, and drives the minute drum through the detent ring. A setting knob is engageable with the shaft, permitting rotation of the latter, and hence of the minute drum, for setting purposes. In setting, the bosses are forced out of the recesses, the ring retracting axially, so that the drum can be rotated with respect to the ring.

Abstract: A zone time display clock having a zone or locality appointing and displaying means having a form of a world map and provided with touch detecting terminals disposed on the world map and with zone illuminating means for illuminating the designated zone. The clock further comprises a reference clock, a time difference generating circuit for generating the time difference signals for the designated and the "home" localities with respect to the reference locality alternately, touch switch means for memorizing a touched place in the world map and activating the zone displaying means and the time difference generating circuit, time and date difference calculating means for calculating the time and the date difference for the designated locality with respect to the "home" locality, and display driving means for displaying the time and the date difference or the date for the designated locality.

Abstract: A circuit arrangement for an electric clock comprises an oscillator stage, frequency divider stages, pulse shaper stages and two output stages for controlling the drive, switch means being provided which is operable to disconnect at least part of the oscillator stage and the two output stages from a voltage source so as to stop the oscillator and prevent the output stages from driving a drive motor.

Abstract: An electronic timepiece with a crystal-controlled oscillator includes a multistage frequency divider and a CMOS switching circuit inserted between the oscillator and the first divider stage. The switching circuit comprises two complementary MOSFETs, with insulated gates connected in parallel to an output lead of the oscillator, and at least one further MOSFET in series with the other two, the latter having an insulated gate connected to another output lead of the oscillator for energization in staggered relationship with the former to bring about simultaneous conduction for one brief instant per half-cycle of the generally sinusoidal oscillator voltage. With an oscillator operating at a frequency on the order of megahertz, the divider stages may form part of an upstream and a downstream frequency divider connected in cascade; the upstream divider may consist of nonbinary stages with individual step-down ratios of 3:1 or higher to minimize overall power consumption.

Abstract: A correction circuit for an electronic timepiece is provided wherein a divider stage can be corrected without effecting correction of any other digit of the electronic timepiece to be corrected. The electronic timepiece includes a quartz crystal oscillator circuit for producing a high frequency time standard signal, a divider circuit including a plurality of divider stages adapted to receive said high frequency timekeeping signals, certain of the divider stages being adapted to produce low frequency timekeeping signals in response to said high frequency timekeeping signals, and display elements associated with said certain divider stages for displaying the time counted thereby in response to said timekeeping signals applied thereto.

Abstract: A calender time piece movement comprising three indicators, the first displaying the units figure of the date, the second displaying the tens figure of the date, and the third displaying the days of the week, an hour wheel, a driving mechanism actuated by the hour wheel and driving the indicators stepwise, and a correction mechanism, wherein the indicators are coaxial with the hour wheel, the correction mechanism comprising a rotating correction assembly and the driving mechanism comprising a calender wheel actuating the first indicator, an intermediate rotating part coaxial with the calender wheel, actuated by the first indicator and actuating the second indicator, and a shifting member coaxial with the correction assembly for shifting the third indicator.

Abstract: An electronic organ comprises memory means for memorizing in an analog manner the synthesizing ratio of repetitively occuring waves such as square waves for synthesizing qualities of sound in response to the signals from means for selecting qualities of sound (to be referred to as tablets hereinafter); a mixing circuit for adding the synthesizing ratio for each repetitively occuring wave when the means for selecting qualities of sound are selected; frequency dividers for dividing the oscillation frequencies of top octave generators, an indirect keying circuit for interrupting the current corresponding to the ratio of repetitively occuring waves in response to the repetitively occuring signal waveforms from the frequency dividers and intermittingly interrupting said current in response to on-off signals from a keyboard; a synthesizing circuit for combining the outputs from the indirect keying circuit into a group for each octave; a variable filter for changing the frequency characteristics electronically in re

Abstract: A temperature compensated electronic timepiece comprises a time reference signal generator for generating a time reference signal and a temperature compensating device for compensating a change of the oscillating frequency of the time reference signal generator caused by any external temperature change. The temperature compensating device comprises a temperature detector having an element composed of two semiconductors of different respective conductivities (such as a transistor composed of P and N type semiconductors) which are joined to form a junction, or an element composed of a conductor and a semiconductor joined to form a junction. The voltage-current characteristics of the junction are changed when the external temperature exceeds a given temperature to deliver a digital signal whose state is reversed from an initial condition. The output signal from the temperature detector compensates any temperature change of the oscillating frequency of the time reference signal generator.

Abstract: There is disclosed a light modulating structure including an open-ended housing within which an electromagnetically driven tuning fork structure is supported. The tuning fork is of composite construction including two L-shaped cross section elements and is manufactured by a method which involves shaping the tines portions of the elements to a desired thickness in a single machining operation before the elements are separated and joined together symmetrically at the toe of the L to form a composite tuning fork.

Abstract: An electronic timepiece, used as a pager watch, has a speaker for emitting an alarm sound at a preset time and also for reproducing an external call signal intercepted by a receiver for incoming electromagnetic waves. The receiver may be maintained normally inactive, being periodically activated for short time intervals under the control of a frequency divider in the output of a crystal oscillator serving to drive an electro-optical display. Sensors responsive to abnormal ambient conditions, e.g. temperature or blood pressure of the wearer, may also operate the speaker.

Abstract: An electronic watch having an illuminating time display is provided with a switch for controlling the illumination which is operable controlled movement of the arm on which the watch is carried. A closed casing in the watch is provided with electrical contacts and a ball which will engage the contacts to close the watch upon predetermined movement of the arm.