Citizen Watch Company, Ltd.

Other

Toshikazu Shimazaki

Hiroshi Ogawa

Minoru Natori

Toshikazu Hatuse

Tadahiko Nakagiri

Toshiaki Oguchi

Kouhei Kawanobe

Kunihiro Daigo

Shigeru Morokawa

Singo Ichikawa

Nagao Mizutani

Hisao Yamagata

Ryo Namiki

Yoshinobu Kashima

Yasuo Okawara

Atsumi Osagawa

Akira Hiraoka

Kunihiko Futaba

A device for detecting a travel condition of an inkribbon for printers is disclosed. The device is composed of a rotary member rotatable in response to the travel of the inkribbon and a signal generation means interlocked with the rotary member. The signal generation means generates a detection signal and can not only detect trouble of the detection device but also detect a mode in operation of a carrier on which the detection device is arranged as well as detect the travel of the inkribbon.

Device for detecting travel condition of inkribbon for printers

An electronic calculator watch which comprises timekeeping means composed of an oscillator, a frequency divider connected to the oscillator, a counter circuit connected to the frequency divider, and a driver circuit connected to the counter circuit for providing an output signal indicative of time information, and calculating means composed of an oscillator circuit and a calculation circuit responsive to perform calculations under control of numerical inputs furnished by external operation device provided on a watch case. The watch also comprises a display including a first display section connected to the driver circuit of the timekeeping means to display the output signal delivered therefrom, and a second display section connected to the calculating means to display the result of calculations, each of the first and second display sections having a plurality of digit electrodes and a plurality of segment electrodes arranged in a matrix configuration.

Electronic calculator watch

A switch structure for an analog quartz crystal timepiece having a watchglass plate, a time dial to display time in an analog mode, and a digital display device, which switch structure comprises a plurality of transparent electrically conductive electrode films provided on the watchglass plate at positions corresponding to numerical display indicia on the time dial to permit generation of input signals corresponding to the numerical display indicia, respectively.

Switch structure for electronic timepiece

A watch case including outer and inner bodies, a cover member and a flexible packing ring in which provision is made of a horizontal groove formed on the outside wall of the inner body, a spring having an internal side fitted to the horizontal groove, a vertical groove formed on the outside wall of the inner body into which a lever is inserted, a first hole provided on one side of the inside wall of the outer body with which one end of the spring is engaged, a second hole provided on opposite side of the inside wall of the outer body with which the other end of the spring is engaged, and the lever supporting the spring engaged with an elongate hole formed on the outer body, and thereby being easily assembled and disassembled by means of the lever.

Watch case

A booster circuit for an electronic timepiece having a power supply and a display device adapted to be driven in a matrix driving mode, which comprises a Cockcroft circuit connected to one terminal of the power supply to provide a plurality of boosted output voltages to the display device and voltage compensating means connected to the other terminal of the power supply to compensate for voltage drops caused by said Cockcroft circuit.

Booster circuit for electronic timepiece

Growing community of inventors

Tanashi, Japan

Toshikazu Shimazaki