Protective circuit for a printer driver

Details Protective circuit for a printer driver Protective circuit for a printer driver

1990-03-29

1992-04-28

Wiecking, David A.

Typewriting machines

Safety switch or condition-responsive-cutoff switch for...

400 74, 318434, 361 23, B41J 2938

Patent

active

051082047

ABSTRACT:
In a protective circuit for a printer driver energized from a drive power supply, and associated with a control circuit for controlling the current supply to the printer driver, and connected to a power supply, a first circuit detects a malfunction of the control circuit with a first predetermined time T1 and resets the control circuit, and a second circuit detects a breakdown of the motor drive transistor with a second predetermined time T2 longer than the first predetermined time, and interrupts an input power supply.

REFERENCES:
patent: 4346371 (1982-08-01), Ida
patent: 4559577 (1985-12-01), Shiji
patent: 4633358 (1986-12-01), Nagano
patent: 4725765 (1988-02-01), Miller
patent: 4937561 (1990-06-01), Sasaki
patent: 4947091 (1990-08-01), Fukuoka

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