Citizen Watch Company, Ltd.

Ryo Namiki

Osamu Matsumura

Kenzi Miyasaka

Tsunetoshi Sekiguchi

Yutaka Kato

Hiroshi Ogawa

Singo Ichikawa

Minoru Natori

Toshikazu Hatuse

Toshiaki Oguchi

Tadahiko Nakagiri

Kotaro Takahashi

Toshikazu Shimazaki

Hisao Yamagata

Yoshinobu Kashima

Kouhei Kawanobe

Kunihiro Daigo

A solar battery timepiece has a structure of a module, a base plate on the module, a solar battery cell on the base plate, an insulating flexible sheet provided with a print wiring and interposed between the base plate and the solar battery cell, and a dial ring attached to the peripheral edge of the base plate whereby the solar battery timepiece may be made with a reduced thickness, small in size, simple in construction, shock resistant and reliable in operation.

Solar battery timepiece

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

The construction of an analogue crystal wrist watch which comprises a base plate, a power source battery cell on said base plate for providing energy to the circuit of said watch, a crystal oscillating element for generating a signal upon receipt of energy, an electronic circuit for dividing the frequency of the output signal from said crystal oscillating element, a frequency division circuit included in said electronic circuit, a step motor comprising a drive coil connected to said electronic circuit, a hand indication means driven by said step motor, an external operation member for correcting said hand indication means and a reset lever interlocked with said external operation member for resetting said electronic circuit.

Construction of an analogue crystal wrist watch

A solar battery timepiece has a structure of a module, a base plate on the module, a solar battery cell on the base plate, an insulating flexible sheet provided with a print wiring and interposed between the base plate and the solar battery cell, and a dial ring attached to the peripheral edge of the base plate whereby the solar battery timepiece may be made thin in thickness, small in size, simple in construction, shock resistant and reliable in operation.

In an electronic wrist watch various component parts are disposed on a plurality of superposed substrates and at least one substrate is provided with a recess or notch for accommodating a battery. A calendar correction mechanism is provided near the stem of the watch and the calendar display mechanism is located opposite the stem.

Electronic wrist watch

Growing community of inventors

Tokyo, Japan

Ryo Namiki