Hammer drive safety device for printer

Details Hammer drive safety device for printer Hammer drive safety device for printer

1979-07-11

1982-02-09

Miller, J. D.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361 86, 361 98, 361 93, 101 9329, H02H 324

Patent

active

043152970

ABSTRACT:
A hammer drive safety device for a line printer having a plurality of solenoid-driven hammers is disclosed, which includes a time limiting circuit for producing an output when a character print command signal is not produced for more than a predetermined duration, the plurality of detectors for detecting currents flowing through the respective solenoids, and a switch responsive to the output of the time limiting circuit and the outputs of the detector for disconnecting the solenoids from the power source.

REFERENCES:
patent: 3243665 (1966-03-01), Fayer et al.
patent: 3589282 (1971-06-01), King
patent: 3748537 (1973-07-01), Vigini
patent: 3998152 (1976-12-01), Hupp
patent: 4019100 (1977-04-01), Barrus

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