Fire alarm with electric and non-electric annunciators

Details Fire alarm with electric and non-electric annunciators Fire alarm with electric and non-electric annunciators

1992-12-04

1993-08-10

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

116106, 340577, G08B 1702

Patent

active

052353230

ABSTRACT:
A fire alarm which consists of a housing, an alarm assembly and a switch assembly. A driving spring in the alarm assembly is used for storing driving energy. As soon as a nylon string in the alarm is burnt and broken, the driving spring will drive small hammers to hit a bell cup to send out a warning signal to warn people that a fire is taking place. At the same time, a switch is closed to actuate an electric alarm to provide a persistent alarm as long as electric power is available.

REFERENCES:
patent: 1991004 (1935-02-01), Thacker, Jr. et al.
patent: 2085860 (1937-07-01), Lambert
patent: 2907014 (1959-09-01), Hollingsworth
patent: 2920167 (1960-01-01), Hill
patent: 3931785 (1976-01-01), Keeley et al.

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