An electronic timepiece with a solar cell includes a timepiece movement, a timepiece case for housing the timepiece movement, a casing ring for housing and holding the timepiece movement in the timepiece case, a solar cell and a dial. The solar cell is disposed almost vertically to a solar cell positioning portion provided in the casing ring, and the solar cell has a slender strip shape formed on a flexible substrate. Consequently, the solar cell is not disposed in the timepiece movement, and it...

A cutting device for an ultrasonic vibration system comprises an elongated tool having a cutting edge formed on the front end thereof, and a torsional transducer attached to the tool body at a nodal point of vibration thereof, as well as, if necessary, an amplifier horn is positioned between the tool body and transducer, so that the torsional transducer serves to apply an elastic vibration to the tool body. SPECIFICATION The present invention relates to a cutting device for an ultrasonic vibrati...

An apparatus for performing automatic digital measurement of the performance of a watch by utilizing a component of the ticks thereof, in which a frequency band of the ticks of the watch is selected, the ratio of signal to noise is improved in that frequency band thereby amplifying the ticks with high fidelity.

This invention relates to a motion converter for converting the oscillating movement of a mechanical vibrator. The motion converter according to this invention is characterized by that the feed pawl is designed to have a substantial resiliency in its oscillating direction and the ratchet wheel has a substantial moment of inertia, said pawl resiliency and said ratchet inertia serving in combination for converting otherwise stepwise intermittent movement of said ratchet wheel into a substantially ...

The perpendicularly meshing spur gearing is especially adapted for use between the winding pinion and the crown wheel of a timepiece and is characterized by a single projecting in the addendum of each tooth and an undercut on the same side of the tooth in the dedendum of each tooth. The projections are in the plane of each gear and are maintained in engagement during the whole engaging period of the related gear tooth.

A wrist watch having two externally operating members, at least one of which is a push-button, in which said push-button is provided on the side surface of a case between the 7:30 and 8:30 positions of a dial and the other one of said externally operating members is provided on the side surface of said case opposite to said push-button but at a location deviating from the position squarely opposite to said push-button with respect to the center of said case.

A correction switching device for a wrist watch provided with an electronic buzzer, comprising a stem having at least three stable positions, and a setting mechanism and an electronic buzzer switch which are operated by said stem such that said setting mechanism is set in a time setting position when said winding stem is in one of said three stable positions and in an alarm setting position when said stem is in one of the other stable positions, and said electronic buzzer switch is set in the "o...

This invention relates to improvements in and relating to time-setting device for an electronic timepiece wherein a mechanical vibrator, preferably a balance wheel tuning fork, a crystal oscillator or the like, used as its time base is kept in its oscillating state by means of electric energy. The invention resides in a time-setting device for an electronic timepiece, comprising a switching means adapted for switching over an electronic timepiece drive circuit from its active and oscillation-mai...

A fluid switching device having a first chamber partitioned by a diaphragm into two chambers, a valve secured to said diaphragm, a nozzle which communicates with one of said chambers having an input passage to supply a pressure fluid to one side of said diaphragm, a thin film disposed in a second chamber, with or without the use of a sealing member to hold the periphery of the thin film in place, means to adjust the gap between said nozzle and film, and/or a solenoid which electrically brings th...

A reflection-type color liquid crystal display device comprises: an STN liquid crystal cell (20) having nematic liquid crystal (6), which is aligned at a twist angle of 180.degree. to 270.degree., sandwiched between a transparent first substrate (1) having first electrodes (3) and a transparent second substrate (2) having second electrodes (4), in which the first substrate or the second substrate is provided with a color filter (7) of a plurality of colors; an absorption-type polarizing film (11...