1977-12-28
1979-02-20
Lake, Roy
Geometrical instruments
49167, 174 86, 200 617, H01R 3900
Patent
active
041403576
ABSTRACT:
A hinge for use with a swinging door provided with an electric lock or other electrically operated device or component therein in which the hinge is provided with chases and hollow hinge barrels sheathing a tubular collar which also serves as a hinge pin and provides a continuous passageway through the hinge for electrical conductors in order to maintain a continuous circuit or circuits through the hinge regardless of the position of the door. Each hinge leaf includes a barrel integral therewith with the barrel and leaf being a one-piece casting. The barrels completely enclose the tubular collar which forms a hollow hinge pin and protects the electrical conductors from attack in the event the leaves and barrels are pried apart.
REFERENCES:
patent: 3838234 (1974-09-01), Peterson
patent: 3860312 (1975-01-01), Gordon, Jr.
Butts Lawrence D.
Kambic Raymond V.
Wolz Francis T.
Folger Adam Co., Division of Telkee, Inc.
Jacobson Harvey B.
Jones DeWalden W.
Lake Roy
O#Brien Clarence A.
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