Retractable tamper resistant annunciator

Details Retractable tamper resistant annunciator Retractable tamper resistant annunciator

1997-10-28

2000-08-01

Tong, Nina

Communications: electrical

Systems

Annunciator

3405456, 340628, 340303, 340305, 340308, G08B 500

Patent

active

060972793

ABSTRACT:
An improved retractable tamper resistant annunciator that can be mounted flush in a supporting structure is described. The annunciator mechanism includes a housing that has an actuatable cover. Signaling devices are enclosed within the housing, and can be selectively actuated when the cover is opened. A mechanism to open and close the cover to expose the signaling devices or to cover the signaling devices include a reversible motor structure. Alternative mechanisms to open and close the cover include biasing structures to move the cover in a first direction and an electrical device to move the cover in a second direction.

REFERENCES:
patent: 2083324 (1937-06-01), Edwards
patent: 2471410 (1949-05-01), Cahusac
patent: 2553244 (1951-05-01), Ellmann
patent: 2594369 (1952-04-01), Verkuil et al.
patent: 4688023 (1987-08-01), McGill et al.
patent: 4706065 (1987-11-01), Kovacic et al.
patent: 5471200 (1995-11-01), Romine
patent: 5682131 (1997-10-01), Gow

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