Citizen Watch Company, Ltd.

Mitsubishi Electric Corporation

Kenji Miyasaka

Shinichi Yamada

Noritoshi Suzuki

Kenji Shimoda

Haruhiko Higuchi

Nobuyuki Uehara

Takashi Fujiwara

Kiyotaka Igarashi

Tadashi Hanaoka

Kazuhisa Yamauchi

Masao Sakuyama

Masaki Kawamura

Fumio Kanno

Takayuki Hasumi

Norio Miyauchi

Nobuhiro Tokumori

Hiroo Enomoto

Kazuhide Kinoshita

Kohichi Satoh

A fine-adjustment synthesizer includes a fractional phase-locked loop having a reference integer frequency divider, a phase comparator, a loop filter, a frequency variable oscillator, a mixer, a baud-pass filter, and a feedback path programmable fractional frequency divider. A coarse-adjustment synthesizer includes an integer-type phase-locked loop having a reference integer frequency divider, a phase comparator, a loop filter, a frequency variable oscillator, a band-pass filter, and a feedback path programmable integer frequency divider. An output of a reference signal source is input in parallel to both the fine-adjustment synthesizer and the coarse-adjustment synthesizer. An output of the frequency variable oscillator in the fine-adjustment synthesizer and an output of the frequency variable oscillator in the coarse-adjustment synthesizer are guided to the mixer and an output signal of the fine-adjustment synthesizer is guided to an output end.

Synthesizer

An electronic watch with a meter function, capable of a multifunctional display, wherein the dial of the watch is divided into a data display region and a mode display region and the area for displaying the mode, and the area for displaying functional quantities are increased to make the graduations easier to read, with one hand indicating a data display region for data corresponding to physical quantities, and one hand indicating the mode region.

Electronic watch with meter function and display means

A self-winding electric power generation watch capable of having an additional function structure besides a time indication and an electric power generation function by virtue of an efficient arrangement of train wheels and motors for watch, electric power generation, and additional function in a watch case. An electric power generation motor,for conducting self-winding electric power generation by means of rotation of a rotary weight,, a watch motor,driven by electric power of the electric power generation motor,, a storage battery,for storing the electric power of the electric power generation motor,, and a chronograph motor,driven by the electric power of the electric power generation motor,are arranged in a watch case so as to surround a center part of the watch. Watch train wheels,and,, an electric power generation train wheel,, and a chronograph train wheel,are disposed in a two-layer form in a region surrounded by the motors.

Self-winding electric power generation watch with additional function

Electronic watch provided with an electrical generator

Small electric apparatus equipped with generator

Power supply unit for electronic appliances

An electronic timepiece having functional hands includes indicating hands for indicating the time such as hours and minutes, a detection unit for detecting the information other than the time and an indicating part for indicating the information detected by the detection unit. The detection unit includes a first functional hand and a second functional hand for indicating mutually relevant information data.

Electronic timepiece having functional hands

An improved structure is disclosed for the movement of an electronic quartz crystal controlled wristwatch of very small size, suitable for use as a ladies bracelet timepiece. The configuration of this structure is such that a relatively large capacity battery can be utilized, thereby ensuring satisfactory battery life, by positioning the battery such as to substantially cover the wheel train of the timepiece and by a special arrangement of shapes and positions for other components of the timepiece.

Movement structure for an electronic timepiece

Growing community of inventors

Tanashi, Japan

Kenji Miyasaka