Audible-visual warning alarm system

Details Audible-visual warning alarm system Audible-visual warning alarm system

1975-07-18

1978-02-14

Caldwell, Sr., John W.

Communications: electrical

Systems

Call station

340244A, 340244B, 340326, 340384E, G08B 2300

Patent

active

040742440

ABSTRACT:
An audible-visual warning alarm system ready for easy installation and suitable for use out of doors is disclosed in which two different sets of audible and visual signals are provided suitable for but not restricted to use with multiple liquid level sensing devices, one set preferably having priority over the other, the sound levels preferably being adjustable but different, the speaker through which the audible signals are made available also having an optional voice input.

REFERENCES:
patent: 1636698 (1927-07-01), Leonard et al.
patent: 3213438 (1965-10-01), Feuce et al.
patent: 3868684 (1975-02-01), Nunn
patent: 3898514 (1975-08-01), Takahashi
patent: 3906491 (1975-09-01), Gosswiller et al.
patent: 3930123 (1975-12-01), Carroll

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