Patents by Inventor Yasushi Nomura

Yasushi Nomura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4194351
    Abstract: An electronic timepiece having a molded casing made of resin for incorporating in one body, timepiece components including a windshield, display means including an electro-optical display element or pointers, timepiece driving means, battery cell case and external switch means.
    Type: Grant
    Filed: November 22, 1977
    Date of Patent: March 25, 1980
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Kazunari Kume, Yasushi Nomura
  • Patent number: 4150536
    Abstract: An electronic timepiece includes a reversible stepping motor to drive rotatable hands to provide a time display. In a first preferred embodiment, the electronic timepiece includes a circuit means to generate alternating current pulses having an increased pulse width or an increased amplitude to drive the stepping motor with an increased driving current during high speed time correction when a manually operable external control member is actuated during time correction.
    Type: Grant
    Filed: January 21, 1977
    Date of Patent: April 24, 1979
    Assignee: Citizen Watch Company Limited
    Inventors: Fumio Nakajima, Kenji Yamada, Takayasu Machida, Yasushi Nomura, Minoru Watanabe
  • Patent number: 4129981
    Abstract: An electronic timepiece having a reversible stepping motor to actuate time-indicating hands to provide a time display, which comprises a driver circuit to produce driving current pulses composed of compound pulses appearing each time unit. A rotor of the stepping motor rotates a plurality of steps during each time unit to cause one of the time-indicating hands to advance through unequal intervals to provide a modulated display.
    Type: Grant
    Filed: February 2, 1977
    Date of Patent: December 19, 1978
    Assignee: Citizen Watch Company Limited
    Inventors: Yasushi Nomura, Fumio Nakajima, Kenji Yamada, Takayasu Machida
  • Patent number: 4107915
    Abstract: A set of digital indicators in an electronic display unit of a timepiece are actuated by driving pulses transmitted thereto through respective stages of a multistage frequency divider. A switching mchanism is manually operable to advance certain of these stages, independently of the driving pulses and at a faster rate, to adjust the display. A timer discriminates between short-term and long-term switch reversals to differentiate between a gating signal, giving passage to a train of high-rate stepping pulses, and (a) selection signals identifying an indicator to be stepped or (b) manually produced pulses for adjustment at a slower rate.
    Type: Grant
    Filed: December 17, 1976
    Date of Patent: August 22, 1978
    Assignee: Citizen Watch Co., Ltd
    Inventors: Fukuo Sekiya, Shigeru Morokawa, Yasushi Nomura
  • Patent number: 4094139
    Abstract: A display control circuit for an electronic timepiece for controlling a timer circuit to vary the length of time for which the display of time or calendar information is to be made. In one preferred embodiment, a timer circuit includes a first section of flip-flops for setting a predetermined length of time when a first external switch is operated, and a second section of flip-flops for setting time interval in addition to the predetermined length of time when a second external switch is operated. A control circuit means is coupled to the timer circuit for controlling the same to vary the total length of time to be set by the timer circuit. In another preferred embodiment, the timer circuit is energized with selected one of frequency signals from a frequency converter of the electronic timepiece to set the length of time in dependence on the selected one of the frequency signals.
    Type: Grant
    Filed: September 10, 1976
    Date of Patent: June 13, 1978
    Assignee: Citizen Watch Company Limited
    Inventors: Yasushi Nomura, Yasuhiko Nishikubo
  • Patent number: 4094135
    Abstract: A switch control unit for an electronic timepiece comprises a plurality of control switches and a sequence decoding circuit which detects sequences of actuations of the control switches to provide a plurality of output signals in dependence on varying combinations of sequences of actuations of the control switches. In modified form, the switch control unit comprises a plurality of control switches, a detecting circuit to detect numbers of actuations of each of the control switches thereby to provide outputs in dependence on varying combinations of numbers of actuations of the control switches, and a decoding circuit to decode the outputs from the detecting circuit to provide a plurality of output signals.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: June 13, 1978
    Assignee: Citizen Watch Company Limited
    Inventors: Yasushi Nomura, Shigeru Morokawa
  • Patent number: 4090350
    Abstract: A switch mechanism for an electronic timepiece comprises a minimum number of control switches and an electric circuit means associated therewith. The electric circuit means is arranged such that when the control switches are actuated independently of each other the control switches provide respective switching functions whereas when selected ones of the control switches are concurrently actuated respective switching functions of the control switches are inhibited and, instead thereof, another switching function is provided.
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: May 23, 1978
    Assignee: Citizen Watch Co., Limited
    Inventor: Yasushi Nomura
  • Patent number: 4067187
    Abstract: A set of digital indicators in an electronic display unit of a timepiece are actuated by driving pulses transmitted thereto through respective stages of a multistage frequency divider. A switching mechanism is manually operable to advance certain of these stages, independently of the driving pulses and at a faster rate, to adjust the display. A timer discriminates between short-term and long-term switch reversals to differentiate between a gating signal, giving passage to a train of high-rate stepping pulses, and (a) selection signals identifying an indicator to be stepped or (b) manually produced pulses for adjustment at a slower rate.
    Type: Grant
    Filed: March 22, 1976
    Date of Patent: January 10, 1978
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Fukuo Sekiya, Shigeru Morokawa, Yasushi Nomura
  • Patent number: 4041219
    Abstract: A silver peroxide-zinc battery having a positive active material composed of silver peroxide, a negative active material composed of zinc, and an electrolyte comprising an aqueous alkaline hydroxide solution, in which an oxide of manganese is added to the silver peroxide.
    Type: Grant
    Filed: March 5, 1976
    Date of Patent: August 9, 1977
    Assignee: Citizen Watch Company Limited
    Inventors: Hajime Nishimura, Yasushi Nomura
  • Patent number: 4025702
    Abstract: A battery having a battery cup and a battery cap which has a ridge portion to provide a battery chamber for accommodating a positive electrode, a negative electrode and an electrolyte. The battery chamber has a contour at its outer periphery different from that of the sealing flanges of the battery cup and the battery cap.
    Type: Grant
    Filed: March 5, 1976
    Date of Patent: May 24, 1977
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Hajime Nishimura, Yasushi Nomura
  • Patent number: 4023890
    Abstract: A digital display device for forming one or more electro-transmissive display patterns, which comprises a pair of oppositely disposed electrodes to which a signal is supplied for energization. Each of the electrodes includes a number of electro-conductive sections which are disposed with a lower distribution density at the central portion and with a higher distribution density at the contour portion. This mode of distribution of the sections gives an equivalent visual contrast to the situations in which all the sections are disposed with a uniform distribution while at the same time reducing the power consumption rate.
    Type: Grant
    Filed: July 31, 1975
    Date of Patent: May 17, 1977
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Shinichi Shirasu, Yasushi Nomura
  • Patent number: 3971205
    Abstract: An all electronic type timepiece is disclosed which comprises a customary or usual display for displaying time, a calendar, a.m., p.m., colon and other functions. An additional display element is provided separately from the customary display or alternatively is constructed as a part thereof for displaying the operating condition of a time counter circuit even when the customary display is extinguished.
    Type: Grant
    Filed: September 5, 1974
    Date of Patent: July 27, 1976
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Yasushi Nomura, Shigeru Morokawa
  • Patent number: 3971012
    Abstract: A photoelectric display device having an electrically controlled optical means for indicating one of the 7 days of the week by means of a combination of two letters selected from alphabetical letters is disclosed. The device comprises a first display element composed of a plurality of segments arranged in such pattern that all of the letters positioned in the first place of the seven combinations expressing the 7 days of the week can be indicated, and a second display element composed of a plurality of segments arranged in such pattern that all of the letters positioned in the second place of the above mentioned seven combinations can be indicated. Each segment of each of the display elements is electrically controlled to indicate any desired days of the week.
    Type: Grant
    Filed: February 25, 1974
    Date of Patent: July 20, 1976
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Shigeru Morokawa, Katsuo Nishimura, Yasushi Nomura
  • Patent number: 3961840
    Abstract: To excite a liquid-crystal display element, a square wave is applied to opposite electrodes of that element by a source of alternating voltage through a switching circuit which briefly short-circuits the display element, during every change of polarity of the voltage source, by connecting both electrodes to the same potential via a low-impedance path. As the display element discharges over that path, the source is open-circuited whereby energy consumption is reduced.
    Type: Grant
    Filed: May 8, 1974
    Date of Patent: June 8, 1976
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Shigeru Morokawa, Fukuo Sekiya, Ryuichi Maruka, Yasushi Nomura
  • Patent number: 3937004
    Abstract: An electronic timepiece, used as a pager watch, has a speaker for emitting an alarm sound at a preset time and also for reproducing an external call signal intercepted by a receiver for incoming electromagnetic waves. The receiver may be maintained normally inactive, being periodically activated for short time intervals under the control of a frequency divider in the output of a crystal oscillator serving to drive an electro-optical display. Sensors responsive to abnormal ambient conditions, e.g. temperature or blood pressure of the wearer, may also operate the speaker.
    Type: Grant
    Filed: May 24, 1974
    Date of Patent: February 10, 1976
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Minoru Natori, Yasushi Nomura, Fukuo Sekiya, Shigeru Morokawa, Akira Nakai