Side camming balance spring lock

Details Side camming balance spring lock Side camming balance spring lock

1976-08-19

1978-01-17

Kannan, Philip C.

Movable or removable closures

Mounted for optional movements

Pivot mounted on sliding member; e.g., slide-stile

49446, 49453, E05D 1310, E05D 1522

Patent

active

040684067

ABSTRACT:
A side camming balance spring lock adapted to be slidably mounted in a jamb channel of a window frame which incorporates slidably mounted camming members in the side of the same operated through flat and curved surfaces on a shaft to effect the locking action. The shaft includes a notch in which the connecting pin for the sash is positioned to effect rotation of the shaft on tilt out of the sash for the locking function. A removable plug closes an aperture in the lock above the shaft notch in which the balance spring connection is positioned. Removal of the plug permits removal of the sash from the lock as well as the disconnection of the balance spring therefrom.

REFERENCES:
patent: 3434236 (1969-03-01), Weidner et al.
patent: 3482354 (1969-12-01), Trout
patent: 3611636 (1971-10-01), Trout
patent: 3789549 (1974-02-01), Yip

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