A time correction device for electronic watches having multi-stage divider circuitry for dividing the high frequency output signals of an oscillator into low frequency timing signals including a gate at the input of each divider stage to be corrected for selectively applying to said divider stage the output signal of the prior stage or the inverse of said prior stage output signal. A switch is provided for manually actuating the gate to pass one of the prior stage output signal and the inverse t...

An electronic clock making use of an electromagnetically actuated tuning fork whose vibrations are converted into rotary motion for driving the gear train of the clock by means of a motion transformer including a V-shaped indexing element. The ends of the indexing element are attached to the tines of the fork at corresponding points thereon, and the vertex thereof is flattened to define a rectangular tongue whose edge engages the ratchet teeth of an index wheel whereby as the tines vibrate, the ...

A contact spring assembly for an electric watch comprises an elongated contact spring which intermittently engages a contact pin on the balance wheel. The contact spring is fixedly mounted at one end to a base member and damped to eliminate undesirable oscillations by positioning a spring portion located a predetermined distance from the end in a slotted member. The spring portion in the slot is surrounded by a material which dampens the vibrations of the spring as the free end contacts the pin ...

An escapement drive for counting mechanisms, in which the pin pallet fork includes a pair of similar pivotally interconnected arms carrying, on the respective extremities thereof, facing the escape wheel, magnet members adapted to cooperate with the coils of an electromagnetic system. These arms are mounted for pivotal movement about respective axes equally spaced from the center of the escape wheel, so that the pallet pins of the arms are positioned to receive therebetween those of the teeth of...

A horological instrument includes an oscillator such as a balance wheel. The oscillator carries a coil, which may consist of a single conductive ring. Current is induced in the moving coil by mutual induction from a fixed coil. One or more fixed magnetic fields are positioned to drive the energized coil. A circuit is provided to energize the coil with current at the proper moment during its oscillation. DESCRIPTION The present invention relates to horology and more particularly to a horological ...

A quartz crystal watch comprising a quartz crystal oscillator for generating relatively high frequency signals, a frequency divider circuit for reducing and converting the frequency of the oscillated signals from said oscillator to predetermined frequencies of clock pulse, a pulse width converter for reducing the pulse width of output pulse signals from said frequency divider circuit, a motion transducer for converting the amplified output signals from the amplifier pulse width converter to the ...

A timekeeping device is provided with a mechanical oscillator electronically sustained without contact. A balance-wheel bearing permanent magnets induces electromotive force in two coils placed at the point of static equilibrium of the wheel. The electromotive forces are used in an amplifier transistor to supply through a third coil coaxial with the two previous ones a sustaining power, and are further used to control a regulator transistor which acts upon the point of operation of the amplifier...

This invention relates to an impact time indicator and, more particularly, to apparatus for insertion in a container for shipping delicate devices to indicate the time when an accident takes place.

An electric or electronic timepiece having a step motor energized by an electric signal and a second wheel moving intermittently and driven by said rotor. A member is mounted on the rotor, or on an intermediate wheel coupling said rotor and second wheel, for positioning said second wheel at predetermined positions when said electric signal is cut off.

A mechanism for transforming a vibratory movement into a rotating movement, particularly for use in timepieces, wherein stepping pawls connected to a vibrating member act onto a ratchet wheel loosely mounted on the vibrating member for relative oscillation in the plane of vibration, the ratchet wheel being advanced by relative displacement between said vibrating member and stepping pawls respectively and said ratchet wheel due to the inertia of the latter. The rotating movement of the oscillatin...