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US 4,522,506 AGranted
Time signal clock
AssigneeSeikosha Co., Ltd.
InventorYoshihito Owa
Life of this patent
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Abstract
Two rows of plural electrodes are disposed on a base plate, and a contact member is resiliently held against two of the electrodes in the two rows. One of the base plate and the contact member is rotated in unison with an hour hand. Pulses which are successively out of phase with each other are supplied to the electrodes in one row, and a displayed time of the hour hand is detected to produce a corresponding time signal in response to outputs from the electrodes in the other row and the pulses.
Claims1
A time signal clock comprising:
- a base plate;
- two rows of plural electrodes disposed on said base plate;
- a contact member resiliently held selectively against two of the electrodes in the two rows for conducting the two electrodes;
- movable means for rotating one of said contact member and said base plate in unison with an hour hand to cause said contact member to slide relatively on said electrodes in the two rows;
- a pulse generator for supplying pulses which are successively out of phase with each other to the electrodes in one of the two rows;
- an output circuit responsive to outputs from the electrodes in the other row and said pulses for producing an output indicative of a display position of the hour hand;
- and time signal means for producing a time signal for an hourly time in response to the output from said output circuit.
4 more elements
Dependencies are inferred from the claim text.