Citizen Watch Company, Ltd.

Shizuo Yamaguchi

Yoshihiko Yanagawa

Hiroshi Ogawa

Hisato Hiraishi

Nagao Mizutani

Yuichi Kato

Yoshikazu Koganei

Asao Saitoh

Naomichi Suzuki

Toyoji Asahina

A card body,has two battery holding sections (,) inside, and two battery holders (,) each containing a battery are housed therein. The two housed battery holders (,) engage locking portions (,) of a stopper (,), thereby setting them unremovable. When the stopper (,) is slid toward one battery holding section (,), the battery holder (,) therein is still kept unremovable, while the other battery holder (,) can be made removable. Thus, even during battery change, at least one battery always remains in the card body to keep supplying a backup voltage to a volatile memory.

Portable information device

Power supply switching circuit for portable equipment

An ink-jet printing head comprises a laminated unit integrally formed as a sintered ceramic product and including a bottom insulating plate element, a top insulating plate element, and a piezoelectric plate element between the bottom and top insulating plate element, the laminated unit having a pressure chamber formed at the piezoelectric plate element fillable with an ink, the piezoelectric plate element having electrode layers formed on opposite surfaces thereof surrounding the pressure chamber, the laminated unit also being provided with an orifice in communication with the pressure chamber. The piezoelectric plate element is constituted such that its thickness is reduced upon applying a drive pulse voltage thereto, resulting in a decrease of the pressure chamber volume, whereby an ink-jet drop is ejected from the orifice.

Printing head for ink-jet printer

The operating speed of an electronic timepiece, whose electro-optical indicator is excited by an oscillator with a frequency harmonically related to its stepping rate, is determined by an electrostatic sensor including a monitoring plate capacitively coupled to an electrode of the indicator. The output of the sensor is a bipolar pulse train developed across a resistor defining a differentiation circuit of small time constant with the condenser formed by the monitoring plate and the electrode, the capacitance of this condenser being on the order of 1 pf or less so that the controlling oscillator is not significantly loaded by the presence of the sensor.

Method of and system for detecting the rate of an electronic timepiece

Growing community of inventors

Sayama, Japan

Shizuo Yamaguchi