An electronic wrist watch with an alarm has a buzzer provided on the outside of a watch case, a perforated cover which covers said buzzer, an excitation circuit which drives said buzzer, apparatus for operating the excitation circuit at some predetermined time, and a small-size dry cell battery for supplying the oscillating power of said buzzer. The cover is coextensive with the watch case. An adjustment for controlling the buzzer volume is provided in one embodiment.

A battery-carrying means for an electric or electronic timepiece wherein the elastic contact means projecting from the cover providing access to a battery-receiving means in said timepiece are positioned on the cover so as to be out of contact with the projected portion of the battery should said battery be inserted with said projected portion facing said cover. An insulating member or a space is provided between said cover and said projected portion to prevent contact therebetween should said b...

A solid state watch includes two gravity switches, one closable when the arm is positioned such that the wrist extends substantially horizontally and the other simultaneously actuatable when the arm and/or wrist is twisted or rotated sidwardly while the wrist is maintained in its horizontal position, such that both switches one in sequence circuit with the other are subject to being concurrently thereby closed at a same period in time, during which the completed closed circuit of the circuitry t...

A tilt sensitive electrical switch wherein an asymmetrically balanced disc mounted on an axis causes electrical contact to be made when it is aligned in the desired activation region (plane); various embodiments are provided for causing electrical contact and for minimizing electrical energy dissipation.

A digital watch with oscillator/divider power selection circuitry. The selection circuitry selects the source of the voltage to be supplied to the crystal oscillator and initial divider circuits. If battery voltage is low because battery current is high, as when the light emitting diodes (LED's) are illuminated in an LED digital watch or when the illumination light is on in a liquid crystal display (LCD) digital watch, the crystal oscillator and initial divider would be powered by two batteries;...

A booster circuit for a liquid crystal display device of a timepiece is disclosed. The booster circuit is a sort of a blocking oscillator having a transformer of which turns ratio is 1 : n (where n is a real number). The rectified output voltage of said blocking oscillator is superposed on the voltage of the cell so that the output voltage of the booster circuit is higher than of the blocking oscillator. A smoothing condenser has ample capacitance to have a larger time constant than the fluctuat...

A battery-operated clock having an opening formed within the housing thereof for the insertion of a battery. A movable contact plate is provided and may be moved to close the opening by means of a slidable adjustment nut and bolt combination projecting through the clock housing. The movable contact plate is formed in a concave configuration so as to apply a spring bias to the slidable adjustment nut and bolt combination which secures the movable contact plate to a flat contact plate fixed to the...

A battery driven electric clockwork mechanism is provided with a battery retaining arrangement comprising an electrical contact tongue, formed as an integral part of the mechanism, and a laminated electrical contact plate which engages an electrical contact portion of the mechanism. A notch may be formed in the tongue to ensure good contact between a positive pole of a battery and the tongue. The laminated electrical contact plate is formed at one end in a U-shaped configuration which urges agai...

A timepiece comprising a nuclear isotopic power source enclosed in a calotte sealed by a cover. A protecting plate is disposed at a distance from said cover, and at least a part of the mechanism of the timepiece is accommodated in the space between said cover and said protecting plate.

A power supply for a watch including voltage multiplying means or transforming means to increase the voltage of a power cell to a higher voltage capable of operating electrical and electronic devices used in watches requiring voltage higher than the conventional 1.5 volts. These include highly efficient quartz oscillators and dividing units, MOS integrated circuits, solid state indicating systems, crystals, piezoelectrical and electrostatic motors and piezoelectric alarm systems, and associated ...