Intrusion detector

Details Intrusion detector Intrusion detector

1974-07-01

1976-01-13

Scott, James R.

Electricity: circuit makers and breakers

Special application

Anti-intrusion type

200161, 335205, H01H 302, H01H 3600

Patent

active

039327183

ABSTRACT:
An intrusion detector comprises a housing attachable to a fixed support, an electrical switch fixed within the housing and having a switch actuator movable within a longitudinal bore in the housing to actuate the switch. The actuator is attachable to a wire tensioned between it and another fixed support so as to actuate the switch upon stretching or cutting the wire, a spring being disposed within the housing bore and having one end engaging the movable actuator to bias it in the direction opposite to the tensioned wire. A closure member closes one end of the bore and engages the opposite end of the spring and is adjustable to preset the initial non-actuating position of the actuator with respect to the switch.

REFERENCES:
patent: 2342034 (1944-02-01), Beakes
patent: 2607866 (1952-08-01), Fruh
patent: 2897307 (1959-07-01), Johnston
patent: 2907014 (1959-09-01), Hollingsworth
patent: 3243797 (1966-03-01), Smith
patent: 3402269 (1968-09-01), Gregory
patent: 3450852 (1969-06-01), Rhodes
patent: 3596021 (1971-07-01), Saul
patent: 3634638 (1972-01-01), Saryon et al.
patent: 3696380 (1972-10-01), Murphy

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