Electromagnetic lock

Details Electromagnetic lock Electromagnetic lock

1995-05-16

1997-02-04

Williams, Howard L.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361191, 361210, 307 39, H01H 4728

Patent

active

056005296

ABSTRACT:
An electromagnetic lock employs a pre-wound bobbin which is forced onto the E-shaped lamination stack of a magnetic core. The housing is configured in two longitudinal sections which are relatively pivotal to provide access for circuitry within the housing for both an outswinging and an inswinging door lock installation. The electromagnet also employs a circuit to sense the power supply to the electromagnet and to automatically select the operating voltage of the electrical coil.

REFERENCES:
patent: 4481554 (1984-11-01), Henricks et al.
patent: 5040089 (1991-08-01), Sasaki
patent: 5184854 (1993-02-01), Chen

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