Lock shoe system for take-out window

Details Lock shoe system for take-out window Lock shoe system for take-out window

1987-09-22

1989-01-24

Kannan, Philip C.

Movable or removable closures

With means mounting closure for reciprocation

With counterbalance

49176, 49453, E05D 1522

Patent

active

047993332

ABSTRACT:
A lock shoe system for a take-out window having take-out jamb liners (10) uses a pair of fins (22) extending laterally outward from opposite sides (18) of a sash pin slot (16) in the jamb liner for supporting lock shoes (30) that move vertically in lock shoe channels (13 and 14) within the jamb liners. The lock shoes bear against and ride on sash sides (24) of the fins, and the lock shoes have pivotally mounted biter knives (40) that can pivot into biting engagement with a frame side (26) of the fins to lock the shoes vertically in place. Arms (45) of the biter knives are engaged by pins (25) extending from the sash (20) into the slots for holding the knives clear of the fins whenever the sash is in its run. When the sash is removed from jamb liners (10), springs (50) on the lock shoes (30) bias the biter knives (40) into locking position against the force of the counterbalance springs (33), which bias the lock shoes upward.

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