Patents Assigned to Rhythm Watch Company, Limited
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Patent number: 4712926Abstract: An electronic timepiece which produces a time tone based on a time code signal from a time code disk, comprising a control circuit for generating read-in signals in response to a start signal produced on the hour, memory circuit means for storing a time code signal from said time code disk in response to said read-in signals, wherein a stored code signal of said memory circuit means is supplied to a clock strike count control circuit as a signal for limiting the number of time tone strikes. Further, first and second memory circuit means are provided for storing the time code successively, and an AM/PM discriminating circuit is also provided for discriminating AM and PM by receiving said stored time codes of said first and second memory circuit means.Type: GrantFiled: June 25, 1986Date of Patent: December 15, 1987Assignee: Rhythm Watch Company LimitedInventor: Tohru Tanabe
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Patent number: 4699518Abstract: A musical scale generating circuit comprises an oscillator, a programmable frequency divider for frequency-dividing an output signal from the oscillator, a tone generating circuit for generating a tone, and a frequency dividing ratio data output circuit for successively outputting frequency dividing ratio data determinative of a plurality of frequency dividing ratios of the programmable frequency divider. A frequency dividing ratio discriminating circuit detects whether a frequency dividing ratio necessary for outputting a desired scale frequency is an odd or even number. A frequency dividing ratio correcting circuit is operative to add one to or substract one from frequency dividing ratio data, when a frequency dividing ratio is detected to be an odd numbered frequency dividing ratio and applies corrected frequency dividing ratio to the programmable frequency divider. A one-half frequency divider further divides a signal from the programmable frequency divider by two.Type: GrantFiled: September 11, 1986Date of Patent: October 13, 1987Assignee: Rhythm Watch Company LimitedInventor: Tohru Tanabe
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Patent number: 4526478Abstract: An electronic sound generating circuit for an electronic device having standard signal generator including a first audio frequency signal generating circuit generating a first audio frequency signal, a second audio frequency signal generating circuit generating a second audio frequency signal having a frequency which differs from said first audio frequency signal, a mixing circuit mixing said first audio frequency signal and said second audio frequency signal to provide a mixed signal, and a tone generating circuit generating an audible tone in response to said mixed signal.Type: GrantFiled: December 27, 1983Date of Patent: July 2, 1985Assignee: Rhythm Watch Company LimitedInventor: Shunichi Makuta
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Patent number: 4525076Abstract: A vocal announcing device for an electronic timepiece in which background sounds are overlappingly performed with vocal announcement during vocal announcement, in which indicated time of timepiece is not only vocally announced but also background sounds are performed to overlap the vocal announcement, and in which background sounds are performed to overlap vocal alarming sounds of timepiece.Type: GrantFiled: September 24, 1980Date of Patent: June 25, 1985Assignee: Rhythm Watch Company LimitedInventor: Katuhiko Takebe
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Patent number: 4481852Abstract: A sound generating circuit for a timepiece including a sound base signal generator, a program divider, a dividing ratio selecting counter a sound interval base signal generator and a sound producer, whereby the sounding action of frequencies which repeatedly changes at the sound intervals and cycles is performed and can produce the onomatopoetic sounds of bird chirp, insect churr and the like which feels soft and soothing for the users.Type: GrantFiled: July 7, 1981Date of Patent: November 13, 1984Assignee: Rhythm Watch Company LimitedInventors: Shunichi Makuta, Hiroshi Miyasaka, Katsuhiko Takebe
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Patent number: 4377345Abstract: An alarm signaling circuit for a timepiece including a volume control circuit having a variable volume controller which can be externally adjusted and a fixed volume setting means which determines a constant volume, a change over switch which selectively changes the controller and the setting means, and a change over control circuit which has a time section for measuring an alarm signalling time and which supplies a change over control signal to the change over switch after a predetermined passage of time from the start of alarm signaling. The alarm signaling circuit performs the alarm signaling action at a certain volume established by the variable volume controller during a first alarm signaling period from a start of alarm signaling till the predetermined passage of time and further performs the alarm signaling action at a fixed alarm volume determined by the fixed volume setting means in a consecutive second alarm signaling period.Type: GrantFiled: December 24, 1980Date of Patent: March 22, 1983Assignee: Rhythm Watch Company, LimitedInventors: Shinji Yamada, Mitsuru Nagoya
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Patent number: 4371268Abstract: A time correction circuit for a timepiece with an electrochromic display which includes a timing circuit having counters counting time standard clock signals and for generating time display output signals, a time display circuit having an electrochromic display section displaying output signals from said counters, a correction mode changeover switch selectively switching between a time display mode and a time correction mode, a correcting circuit which works only when said correction mode changeover switch selects the correction mode to change the count in the counters, a writing and erasing control circuit for controlling the timing of the writing and the erasing of the electrochromic display section in response to the mode selected by the correction mode changeover switch and a correction pulse generating circuit for outputting time correction writing pulses of smaller pulse width than time correction writing and erasing pulses during the time display mode when the correction mode changeover switch selectsType: GrantFiled: December 24, 1980Date of Patent: February 1, 1983Assignee: Rhythm Watch Company LimitedInventors: Hiroshi Miyasaka, Shinji Yamada
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Patent number: 4358838Abstract: An electronic timepiece with a time striking device including an electric preliminary signalling means, an electric time striking means, an electric contact means, a time striking selecting means, and a time striking timing circuit in which a timer circuit is included, and preventing mishearing of time striking numbers at a right hour due to the preliminary signalling action making a time striking action predicted in advance.Type: GrantFiled: August 20, 1980Date of Patent: November 9, 1982Assignee: Rhythm Watch Company LimitedInventor: Norihiko Nakamura
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Patent number: 4316277Abstract: An electronic clock movement structure in which pressure to the contact plates by attachment of the upper case to the lower case does not electrically connect the contact plates with the circuit base plate but also holdingly attaches the gear train combination to the lower case.Type: GrantFiled: July 10, 1980Date of Patent: February 16, 1982Assignee: Rhythm Watch Company LimitedInventor: Itaru Endo
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Patent number: 4247933Abstract: A time striking device for a timepiece including an electric time striking means, an electric contact means electrically controlling the operation of the time striking means, a time striking selecting cam plate synchronously rotating with a time indicating gear train to control the electric contact means in a state capable of closing circuit action at the striking time, a one-minute cam plate synchronously rotating with the time indicating gear train to control the electric contact means in a state capable of closing circuit action at one minute interval, a one-minute control lever transmitting contact point control force of the one-minute cam plate to the moving contact plates of the electric contact means.Type: GrantFiled: July 11, 1979Date of Patent: January 27, 1981Assignee: Rhythm Watch Company LimitedInventor: Norihiko Nakamura
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Patent number: 4175373Abstract: A digital display clock including a one-minute indicating wheel, a ten-minute indicating wheel and an hour indicating wheel which are driven by intermittent and segmental rotations through separately provided Geneva-gear mechanisms for each individual indicating section, a driving system arranged in the back of digital clock, so that the clock is able to provide a wide and effective display area in front of the clock and an excellent design for a 24 hour display digital clock with diversity.Type: GrantFiled: December 30, 1977Date of Patent: November 27, 1979Assignee: Rhythm Watch Company LimitedInventors: Kazuo Miyamoto, Isao Suzuki, Hideo Koide
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Patent number: 4139981Abstract: A pendulum clock mechanism may have an escapement coupled to a conventional pendulum bob by means of an anchor arbor which is frictionally or slip coupled to an anchor having at least a pair of pallet pins symmetrically disposed thereon for engagement to an escape wheel. The pallet pins engage the escape wheel in a conventional manner to regulate the operation of a conventional clock gear train. The anchor automatically rotates to a position of design equilibrium regardless of improper vertical installment of the clock or excessive torques applied to the escapement mechanism.Type: GrantFiled: December 30, 1976Date of Patent: February 20, 1979Assignee: Rhythm Watch Company LimitedInventors: Kazutoshi Nozawa, Yasue Ashibe, Hatsuo Aruga, Kunio Tatsuzawa
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Patent number: 4005570Abstract: A leaf-type clock driven by a intermittent and segmental rotation by using so called Geneva-gear mechanism to cause turning-over of the time- and minute-indicating leaves is disclosed. This leaf-type clock has the advantages that number of the leaves may be reduced, and that the time accuracy is improved, and further that small-sized clock can be designed.Type: GrantFiled: July 8, 1975Date of Patent: February 1, 1977Assignee: Rhythm Watch Company, LimitedInventors: Kazuo Miyamoto, Hideo Koide, Isao Suzuki