Measuring and testing – Vibration – Sensing apparatus
Patent
1978-10-30
1980-02-26
Kreitman, Stephen A.
Measuring and testing
Vibration
Sensing apparatus
200DIG29, H01H 3514, G01V 116
Patent
active
041899458
ABSTRACT:
A seismic responsive operating device in which a sphere supported on a seat on the top of a column with a spiral guideway around the columns to guide the sphere against a lock lever for releasing a compressed spring, a spring loaded operating arm is capable of lifting the locking lever to out of the way position to allow the arm to operate a device.
REFERENCES:
patent: 1645122 (1927-10-01), Wallace
patent: 3730004 (1973-05-01), Cwycyshyn et al.
patent: 4007643 (1977-02-01), Matsushita
patent: 4086807 (1978-05-01), Nakada
Kreitman Stephen A.
White George B.
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