Closure fasteners – Bolts – Sliding and rotary
Patent
1977-03-04
1979-02-06
Wolfe, Robert L.
Closure fasteners
Bolts
Sliding and rotary
292DIG20, 292DIG47, E05B 6900
Patent
active
041381505
ABSTRACT:
A window comprising a first sash, and a second sash movable relative to one another, and a window lock mounted on one of the sashes. The window lock includes a housing having an inner wall adjacent one sash and an outer wall. A block is fixed on the inner surface of the outer wall. A plunger is slidable in openings in the inner and outer walls and block. The opening in the inner and outer walls are circular. The opening in the block includes radial portions and the plunger has a radial projection conforming generally to the radial projection of the opening in the block. The other sash has an opening adapted to be engaged by the plunger such that when the plunger is in engagement with the opening in the other sash the other end of said plunger is spaced from the outer surface of the other wall. A knob is releasably engageable with the outer end of the plunger for engaging the plunger and moving it axially to unlock the sashes. A spring yieldingly urges the plunger toward the opening in the other sash. A portion of the block adjacent the inner surface of the outer wall is cut away to provide a space so that when the radial projections are moved into the space, the plunger can be rotated to hold the plunger out of engagement with the opening in the other sash.
REFERENCES:
patent: 72807 (1867-12-01), Cooper
patent: 1154074 (1915-09-01), Strong
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