Electricity: circuit makers and breakers – Special application – Change of inclination or of rate of motion responsive
Patent
1978-06-27
1980-01-22
Scott, James R.
Electricity: circuit makers and breakers
Special application
Change of inclination or of rate of motion responsive
200 6152, 200 6193, 200277, H01H 3514, G08B 1300
Patent
active
041851803
ABSTRACT:
The invention provides a vibration sensing device which is used in safety and security equipment. The device is effectively an electrical switch and includes a pair of spaced apart electrically conductive plates each having an annular track formed by a hole. An electrically conductive bar is mounted between the plates on the tracks. On sensing a vibration the bar will resonate lifting off the tracks thus making and breaking the electrical circuit between the plates.
REFERENCES:
patent: 2721611 (1955-10-01), Gordon
patent: 2996586 (1961-08-01), Shindledecker et al.
patent: 3161737 (1964-12-01), Hall
patent: 3161738 (1964-12-01), Hall
patent: 3295101 (1966-12-01), Ellis
patent: 3486143 (1969-12-01), Wilkes
patent: 3696380 (1972-10-01), Murphy
patent: 4025744 (1977-05-01), Kniskern
patent: 4085304 (1978-04-01), Hasler
Wilkes, D. F.; "Rolamite: A New Mechanical Design Concept"; Sandia Laboratories, Mar. 1969; No. SC-RR-67-656B, pp. 59-61.
Institute for Industrial Research & Standards
Scott James R.
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