Postage meter including a safety locking circuit

Details Postage meter including a safety locking circuit Postage meter including a safety locking circuit

1994-09-15

1996-01-23

Pellinen, A. D.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

363124, 200 50A, 307328, H02M 3335, G07B 1700, H01H 1318

Patent

active

054869730

ABSTRACT:
A mail-processing machine including an electrical power supply for powering at least one control motor, and a safety locking circuit electrically connected to a cover switch of the machine and co-operating with the electrical power supply to switch the power supply off whenever the cover of the machine is open. The machine includes a chopper electrical power supply comprising at least one power chopper circuit having a control circuit. The safety locking circuit includes at least one electromechanical relay electrically connecting the power chopper circuit to its control circuit, and constituting an integrated on/off mechanism that is approved, cheap, and very compact.

REFERENCES:
patent: 4421977 (1983-12-01), Kittredge
patent: 4455462 (1984-06-01), DeLucia
patent: 4910634 (1990-03-01), Pipkorn
patent: 5077631 (1991-12-01), Cleary
patent: 5237140 (1993-08-01), Akazawa et al.
French Search Report FR 9311395, 8 Jun., 1994.

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