Closure fasteners – Bolts – Multiple
Patent
1991-01-03
1992-02-25
Nicholson, Eric K.
Closure fasteners
Bolts
Multiple
292 36, 292DIG20, 292DIG47, E05C 900
Patent
active
050907506
ABSTRACT:
A locking mechanism for windows having upper and lower sashes slidably disposed in a window frame. In the locked position of the mechanism, locking bolts mounted on the transverse rail of one sash engage a sidewall of a guide groove in the window frame, thereby forcing that sash towards the other sash to effect a better seal between the sashes. Optionally, at least one sash clamp mounted on a transverse rail of one sash is adapted to engage a cooperating receiving element affixed to the adjacent transverse rail of the other sash. In the unlocked position of the mechanism, the sash clamp disengages the receiving element, and the locking bolts release contact with the sidewall of the guide groove while still remaining within the groove. The locking mechanism also has a release position in which the locking bolts are retracted from the guide groove to permit the sash to be moved transversely for cleaning.
REFERENCES:
patent: 336302 (1886-02-01), Dudgeon
patent: 480148 (1892-08-01), Theby
patent: 1041803 (1912-10-01), Kilburn
patent: 1059999 (1913-04-01), James
patent: 1253810 (1919-01-01), Gianninoto
patent: 1393628 (1921-10-01), Leichter
patent: 1704946 (1929-03-01), Lindgren
patent: 1901974 (1933-03-01), Macy
patent: 2537736 (1951-01-01), Carlson
patent: 3811718 (1974-05-01), Bates
Fixfabriken AB
Nicholson Eric K.
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