Security interface system for a door, window or the like

Details Security interface system for a door, window or the like Security interface system for a door, window or the like

1983-05-13

1985-12-03

Rowland, James L.

Electricity: circuit makers and breakers

Special application

Actuated concurrently with operation or use of art device

200 6173, 200 6174, 200275, 340545, H01H 316

Patent

active

045567654

ABSTRACT:
A contact unit for use in a security system for monitoring a structural opening such as a door or a window. The contact unit includes a housing of electrically insulation material, and an elongated resilient electrically conductive member that has one end fixed to the housing with an intermediate portion of the conductive member protruding through an opening in the housing. The protruding intermediate portion of the conductive member includes first and second angularly offset sections with a contact surface at the junction of the two sections for engagement by an electrically conductive actuator. The second section of the protruding portion is disposed adjacent fixed structure in the housing such that the second section willingly engages and is flexed by that fixed structure as the contact surface is moved towards the housing. This flexing interaction progressively increases the resistance of the conductive member to movement into the housing, with accompanying increase in contact pressure between the conductive member and the actuator.

REFERENCES:
patent: 2912540 (1959-11-01), Sawicki
patent: 3567882 (1971-03-01), Beck
patent: 3569645 (1971-03-01), Lea
patent: 3668579 (1972-06-01), Herman
patent: 3694595 (1972-09-01), Horecky
patent: 4035596 (1977-07-01), Marquardt et al.
patent: 4151382 (1979-04-01), Kaufman et al.
patent: 4210888 (1980-07-01), Holce
patent: 4213110 (1980-07-01), Holce
patent: 4392707 (1983-07-01), Holce et al.
"Foil Take-Off Contact Switch", Ademco 379, (Catalog page and installation instruction sheet).

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