Double purpose security plate

Details Double purpose security plate Double purpose security plate

1984-03-02

1986-04-22

Dorner, Kenneth J.

Closure fasteners

Bolt guards

E05B 1720

Patent

active

045837767

ABSTRACT:
The invention comprises a design improvement on security plates of the type which are designed to prevent unauthorized entry through a door equipped with a door latch set by means of the use of a credit card or the like. The improvement provides a single security plate equipped with a double ended design which provides for installation on either in inward swinging or an outward swinging door.

REFERENCES:
patent: 1814961 (1931-07-01), Phillips
patent: 2144075 (1939-01-01), Mora
patent: 3405962 (1968-10-01), Sushan
patent: 3592498 (1971-07-01), Raccuglia
patent: 3673605 (1972-06-01), Allenbaugh
patent: 3764173 (1973-10-01), Griffith
patent: 3825291 (1974-07-01), Sprunger
patent: 3967845 (1976-07-01), Governale
patent: 4183568 (1980-01-01), Ferracane
patent: 4189175 (1980-02-01), Paxton

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