Electricity: circuit makers and breakers – Special application – Change of inclination or of rate of motion responsive
Patent
1975-10-15
1977-08-16
Scott, James R.
Electricity: circuit makers and breakers
Special application
Change of inclination or of rate of motion responsive
200 6152, 200 6193, H01H 3514
Patent
active
040427960
ABSTRACT:
A delicately balanced but normally closed polished ball bearing sensor highly responsive to physical vibrations of its immediate environment having security significance. A ball bearing is confined within a cylindrical metal shell with a very slight clearance permitting free vibration of the ball within said shell and resting by gravity upon the rounded head of a metal electrode mounted axially in an epoxy block also confined within said shell, conductor leads being soldered to said shell and said electrode and the assembly being enveloped co-axially within an epoxy casting having a flat face covered by a waterproof pressure adhesive serving to secure the sensor to any smooth flat vertical surface whereby the sensor is mounted in upright vertical position.
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Keech Dana E.
Scott James R.
Zink Enterprises Security Systems
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