Protection of property

Details Protection of property Protection of property

1988-11-07

1990-04-10

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

340566, 256 12, H04B 1100

Patent

active

049164333

ABSTRACT:
A security installation includes a primary barrier section protruding upwardly from a substrate and extending along the substrate in a first direction, a secondary barrier section protruding from, and extending along, the primary section, with the secondary barrier section being movable with respect to the primary barrier section in a second direction extending transversely to the first direction, and sensing means for sensing movement in the second direction of at least a portion of the secondary barrier section relative to the primary barrier section.

REFERENCES:
patent: 1703189 (1928-04-01), Getz
patent: 3803548 (1974-04-01), Skujins
patent: 4005397 (1977-01-01), Blair
patent: 4676485 (1987-06-01), Ciordinik
patent: 4764756 (1988-08-01), Van Thematt

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