Breakage detector having a conductive bent metallic leaf spring

Details Breakage detector having a conductive bent metallic leaf spring Breakage detector having a conductive bent metallic leaf spring

1976-06-18

1978-10-24

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

200 6149, 340501, 200 6101, G08B 1302, G08B 1304

Patent

active

041224450

ABSTRACT:
The detector is primarily for detecting glass breakage and is constructed as a sensing element for detecting the breakage and generating an alarm signal. The detector generally comprises a thin cylindrical casing including a first leaf spring and a second leaf spring having a plurality identations or bends thereon for absorbing noise signals below a breakage frequency signal when a glass panel is actually broken or cut.

REFERENCES:
patent: 2741675 (1956-04-01), Chase et al.
patent: 2885504 (1959-05-01), Yurtz
patent: 3521266 (1970-07-01), Hall
patent: 3899784 (1975-08-01), McHenry
patent: 3973095 (1976-08-01), Greene

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