Movable or removable closures – With protective grille or safety guard – Moves relative to primary closure
Patent
1984-07-09
1986-12-30
Aschenbrenner, Peter A.
Movable or removable closures
With protective grille or safety guard
Moves relative to primary closure
292162, 292302, E06B 368
Patent
active
046318623
ABSTRACT:
Security gratings covering windows of buildings are quickly and reliably opened only from the interior of the building by hinging the grating at a first end and having at the second end short end bars that extend through holes to the interior of the building. A locking bar vertically slideable in bushing members attached to the interior wall has hook portions that extend out and engage the end bars to prevent the grating to be hinged open. The lower end of the locking bars is locked against vertical movement by a quick release pin that engages the locking bar and a fixture attached to the wall near the floor and out of reach of an intruder reaching in the window. To open the grating it is only necessary to pull the pin and vertically move the locking bar to release its hooks from the ends of the end bars. Interior window gratings employ a similar vertically slideable locking bar having either upturned or downturned hooked sections extending out from the bar for engaging holes in flat end plates on the hinged grating. The locking bars are similarly locked against vertical movement by quick release pins.
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patent: 4263747 (1981-04-01), Coltrin et al.
Aschenbrenner Peter A.
Castle Linval B.
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