Entry detection screen

Details Entry detection screen Entry detection screen

1977-02-02

1979-03-27

Lake, Roy

Geometrical instruments

340545, G01D 2104, H01R 304

Patent

active

041462939

ABSTRACT:
An entry detection screen, sometimes called a protective screen, is formed having an alarm circuit sewed onto the screen to fix it in place. One form of the circuit includes double wires so that two series circuits can be provided. The double wires can be twisted to make following the circuit more difficult. A twist of the double wires can be made under a frame section where it cannot be seen by an intruder.

REFERENCES:
patent: 3051935 (1962-08-01), Willson
patent: 3495054 (1970-02-01), Lea
patent: 3863242 (1975-01-01), Minton

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