Fire alarm pull station

Details Fire alarm pull station Fire alarm pull station

1982-05-27

1985-11-05

Caldwell, Sr., John W.

Communications: electrical

Systems

Signal box type

340305, G08B 25100

Patent

active

045517070

ABSTRACT:
In order to pull a fire alarm door to actuate an alarm, a complimentary door must first be pushed in so as to permit an operator to pull the fire alarm door.

REFERENCES:
patent: 335025 (1886-01-01), Gaynor
patent: 363948 (1887-05-01), Chase
patent: 1043975 (1912-11-01), Shier et al.
patent: 3905027 (1975-09-01), McWilliams
patent: 3938127 (1976-02-01), Tabet
patent: 4081796 (1978-03-01), Tabron
patent: 4424510 (1984-01-01), Hartshorn

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