Electricity: electrical systems and devices – Control circuits for electromagnetic devices – For relays or solenoids
Patent
1980-03-26
1981-09-01
Miller, J. D.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
For relays or solenoids
361166, 361191, 307 41, 400 61, H01H 4700
Patent
active
042875501
ABSTRACT:
A driving circuit for printing devices in an electric cash register comprising a pair of first diodes which are connected in series in the normal direction respectively with a journal printing magnet and receipt printing magnet paired with each other and are connected with each other, a first switching transistor connected between the connecting point of the pair of first diodes and a negative (-) terminal of a current source, a second diode connected in the reverse direction between said connecting point and a positive (+) terminal of the current source, a second switching transistor connected between a common feeding line to the journal printing magnets and the positive (+) terminal of the current source and a third switching transistor connected between a common feeding line to the receipt printing magnets and the positive (+) terminal of the current source, to simplify the circuit formation and reduce the manufacturing cost.
REFERENCES:
patent: 3398330 (1968-08-01), Poole
patent: 4128856 (1978-12-01), Macleod
Copal Company Limited
Miller J. D.
Schroeder L. C.
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