Earthquake indicator light apparatus

Details Earthquake indicator light apparatus Earthquake indicator light apparatus

1992-02-27

1993-02-09

Ostrager, Allen M.

Illumination

Light source and modifier

Condition responsive

362802, F21V 3300

Patent

active

051848899

ABSTRACT:
An indicator light is arranged for actuation upon vibration imparted to the light housing. A mercury switch cooperates with a first switch to effect actuation of the light, with the mercury switch arranged for effecting contact. Further, the housing is arranged to include a pin member displaced within the housing upon vibration being imparted to the housing and pin member.

REFERENCES:
patent: 5029205 (1991-07-01), Archer

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