Movable or removable closures – With protective grille or safety guard – Moves relative to primary closure
Patent
1990-08-08
1991-05-28
Kannan, Philip C.
Movable or removable closures
With protective grille or safety guard
Moves relative to primary closure
49 55, 49141, 49379, 49394, 292DIG72, 292304, E06B 368
Patent
active
050183028
ABSTRACT:
A burglar bar assembly for establishing a security barrier across a door or window opening composed of a plurality of horizontal cross bars held in vertically spaced relation by intervening and transversely related vertical members. Certain of the vertical members are fixed rigidly to certain of the cross bars, but slidably joined to others in a manner to provide for extension and retraction adjustment of the barrier to accomodate variations in door or window dimensions. The bar assembly is hingedly connected at one end to a window or door frame to provide for swinging opening and closing operation of the barrier. A safety latch is mounted adjacent one end of the bar assembly and comprises a spring loaded cam member pivotally moveable against spring bias by a remotely operated cable. The cam member serves to capture and lock the unhinged end of the barrier to a rigid locking channel secured to the window or door frame; such channel having spaced angulated slots receptive of the cross bars. Releasing operation of the cam member permits the cross bars to escape from the locking channel slots by force of gravity. The cam is also arranged to automatically retract and lock the cross bars in the angulated slots of the locking channel in response to movement of the bar assembly to a closed position over the window or door opening.
REFERENCES:
patent: 1960015 (1934-05-01), Kitzelman
patent: 4680890 (1987-07-01), Jokel
patent: 4685316 (1987-08-01), Hicks et al.
patent: 4793098 (1988-12-01), Wilkerson
patent: 4796384 (1989-01-01), Warwick
John Sterling Corporation
Kannan Philip C.
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