Detector base

Details Detector base Detector base

1993-04-23

1995-04-04

Abrams, Neil

Electrical connectors

With coupling movement-actuating means or retaining means in...

Bayonet coupling part movable about its axis

H01R 13625

Patent

active

054031982

ABSTRACT:
A fire detector includes both a detector unit and a detector base including a base block (1) to which the detector unit (4) is mounted. The detector unit has an outermost peripheral wall (4a), an engaging portion (5) located inwardly of the outermost peripheral wall, and connecting members (17,18,19) of a bayonet coupling. The detector base includes coupling members (7,8,9) of a bayonet coupling engaged with the coupling members of the detector unit. The bayonet coupling is locked in place by a locking spring (3) of the base block of the detector base, which locking spring engages the engaging portion (5) of the detector unit. The engaging portion of the detector unit may define a recess (5b), in which case the locking spring has a projection (6) which will snap into the recess (5b) in the detector unit during rotation of the detector unit relative to the detector base to secure the bayonet coupling. The entire portion of the locking spring is disposed within the recess (2) in the base block of the detector base such that a tool must be used to release the locking spring thereby preventing an unauthorized disconnection of the detector unit from the detector base.

REFERENCES:
patent: 1774461 (1930-08-01), Van Amburg
patent: 3292135 (1966-12-01), Robinson
patent: 3767917 (1973-10-01), Lampart et al.
patent: 4139770 (1979-02-01), Beyersdorf
patent: 4396840 (1983-08-01), Araki et al.
patent: 4584485 (1986-04-01), Powers et al.
patent: 4672217 (1987-06-01), Dobrzanski
patent: 4786811 (1988-11-01), Sasaki
patent: 4897634 (1990-01-01), Sawa et al.

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