A circuit arrangement for the triggering of motors includes a winding arrangement, the connections of which can be connected to electricity sources by means of a commutation facility. Several or several groups of electricity sources can be connected to the same connections at the same time to make rapid processes of acceleration and deceleration of the rotor of the motor possible. A rotary field causing deceleration can thereby be superimposed upon a rotary field causing acceleration without the...

A speed control circuit for triggering a motor, of the kind having a winding arrangement with multiple taps, comprises a plurality of electrical sources and a switching network coupled between the plurality of electrical sources and the taps of the winding arrangement. The switching network has selectively operable switches, for example, electronically controllable switches, for connecting more than one of the electrical sources to any one of the taps at the same time. A commutation controller i...

A circuit for measuring the duration of a cut-off period in the power supply to an electronic system, for example the control system of a motor vehicle starter, comprises a voltage splitting bridge and a processing unit receiving the output of the splitting bridge. The bridge supply voltage is derived from the power supply to the electronic system, and the bridge has a branch which includes a temperature variable resistor. The processing unit determines the duration of the cut-off period as a fu...

Indentations provided on the periphery of the balance wheel of a time piece are engageable by a starting spring carried on one end of a starting lever actuated by a push-pull movement of the winding stem to stop the time piece with the balance wheel angularly displaced from neutral position. Preferably two indented portions are provided at diametrically opposite sides of the balance wheel.

A whole body swingable clock which includes a clock body swingingly supported on the pendulum fulcrum, an additional pendulum contained in the clock body to swing the clock body by means of movement of gravity center position, said clock body containing a clock drive mechanism having a clock drive gear train to indicate a certain time and an additional pendulum drive mechanism having an additional pendulum drive gear train to drive the additional pendulum, the additional pendulum drive gear trai...

A chronograph watch including an oscillating lever. The axis of rotation of the oscillating lever is carried by a moveable member. Movement of the oscillating lever controls part of the operation of the watch; movement of the moveable member controls another part of the operation of the counter.

A system for the control of a wheel for driving a chronograph hand in rotation comprising a device for locking the hand-wheel, which includes a locking shoe mounted on a support connected to the return-to-zero lever and to the coupling rocker, so that the movement of the hand-wheel away from the rocker and the lever results in a movement of the locking shoe towards the hand-wheel and in their mutual engagement.

A pendulum rod is mounted so as to be able to swing within a desired or a normal swing angle. The means mounting the pendulum rod include means for restricting movement of the pendulum rod along the swinging axis relative to the support body when the pendulum rod is within this desired swinging angle to prevent the detachment thereof and for enabling free movement of the pendulum rod along the swinging axis when the pendulum exceeds the desired swinging angle to permit detachment thereof. The mo...

The toothbrush receptacle with timing device comprises a hollow body structure having a body opening at one end and a compartment provided adjacent to the other end for accommodating a timing device. The compartment has a compartment opening at the second end of the body structure. The toothbrush receptacle further comprises an exterior surface and an interior surface. The timing device comprises a switch mechanism, an energy source, an audio device and/or a visual sensor, and a timer. The tooth...

An cam wheel mechanism adapted for application to stopwatch or chronograph arrangements in watches is provided having a ratchet wheel superposed on and tightly fixed to a cam wheel for rotation about a common axis. An operating lever is positioned for engagement with a tooth of the ratchet wheel for the incremental rotation of said ratchet wheel and cam wheel. The cam wheel is formed with alternating projections and recesses in the periphery thereof dimensioned for engagement or receipt of a cor...