Door bell/answering system

Details Door bell/answering system Door bell/answering system

1995-05-02

1996-10-29

Mullen, Thomas

Communications: electrical

Condition responsive indicating system

Specified indicator structure

340326, 340330, G08B 2508

Patent

active

055700837

ABSTRACT:
A door bell system presents a normal door bell alarm with an alternative speech record/playback assembly. Upon depression of the exterior button extending through an exterior housing adjacent a building entrance the system with either energize the door bell or urge the visitor to leave a recorded message for subsequent playback. The door bell and/or record modes are selected by the user by a switch located within an interior housing mounted adjacent a building entrance. The housings include the appropriate components and wiring to provide the door bell and record/playback functions.

REFERENCES:
patent: D339130 (1993-09-01), Johnson
patent: 3938120 (1976-02-01), O'Connell
patent: 3964058 (1976-06-01), Winston
patent: 4023151 (1977-05-01), Markham
patent: 4100581 (1978-07-01), Slack et al.
patent: 4275274 (1981-06-01), English
patent: 4868540 (1989-09-01), Housley
patent: 5148468 (1992-09-01), Marrick et al.
patent: 5210520 (1993-05-01), Housley
patent: 5210528 (1993-05-01), Schulman

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