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 ...

A sluice device for insertion between zones having different environmental conditions, for instance pressure and/or temperature. A drum is rotatably arranged in an opening in a housing and has radially displaceable flaps uniformly distributed along the periphery of the drum. Each flap has a first portion for sealing against the housing, and a second portion of the flap, adjacent to the drum, cooperates with a sealing device. The sluice device is formed as a longitudinal groove which is open agai...

A pick-up attached to the shaft whose movement is to be regulated picks up a signal periodically produced by the shaft itself during its rotation. The signal triggers an electronic circuit which emits a stable signal of constant duration which acts on the pulsing system of the shaft.

An electrical light fixture comprising a housing (12), a lamp assembly (11) within the housing, and a protective cage (13) surrounding the housing. The protective cage can be formed with a pair of cage elements (14, 15) joined together, and the lamp assembly can have a slip-fit engagement with the housing through an open end thereof.

An electronic timepiece comprising an oscillating circuit for producing a standard time signal, a dividing circuit for dividing the output signal of said oscillating circuit and a driving circuit. The output signal of said driving circuit is controlled by a controlling circuit cooperative with the dividing circuit for changing the division of the standard time signal.

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 l...

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...

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 l...

Briefly stated, the system in accordance with an object of the present invention, is related to a system for generating finite pulses from signals derived from a selected stage of a frequency divider receiving high frequency signals from a master oscillator, said pulses providing a drive control for an electric stepping motor of an electronic watch. The pulses generating system comprises two logical storage means, e.g two toggles in a master-slave arrangement, synchronised by sync. signals deriv...

An indexing device is provided for an electronic timepiece which includes a rotor and stator arrangement. The indexing device includes a pinion rotatable with the rotor and an index wheel engaged with and rotated by the pinion. An index spring having cantilever form is mounted adjacent the index wheel and a pallet jewel is mounted on the spring and is in engagement with the index wheel to prevent reverse rotation and vibration of the same.