Electrical receptacle for use with annunciator apparatus for mon

Details Electrical receptacle for use with annunciator apparatus for mon Electrical receptacle for use with annunciator apparatus for mon

1993-01-14

1994-09-13

Barrett, Glenn T.

Electricity: circuit makers and breakers

Combined with or actuated by connector coupling

Coupling-actuated switch

200 5102, 439188, H01R 3396

Patent

active

053470958

ABSTRACT:
An electrical receptacle for use with an annunciator for indicating the removal of an electrical plug from the electrical receptacle. The electrical receptacle includes neutral switching contacts actuated in response to the insertion of a plug into the receptacle. An input circuit in the annunciator apparatus monitors the state of the neutral switching contacts and couples signals produced when a plug is removed to a latching circuit thereby to produce an audible or electrical indication of plug removal.

REFERENCES:
patent: 3090948 (1963-05-01), Cremer
patent: 4028691 (1977-06-01), Zeder
patent: 4075617 (1978-02-01), Wireman
patent: 4097843 (1978-06-01), Basile
patent: 4271337 (1981-06-01), Barkas
patent: 4853823 (1989-08-01), Arechavaleta et al.
patent: 5095182 (1992-03-01), Thompson
patent: 5113045 (1992-05-01), Crofton

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