Adjustable friction block and tackle window balance system

Details Adjustable friction block and tackle window balance system Adjustable friction block and tackle window balance system

E - Fixed Constructions

05

F

268/34

E05F 1/00 (2006.01) E06B 3/44 (2006.01)

Patent

CA 1278001

TITLE ADJUSTABLE FRICTION BLOCK AND TACKLE WINDOW BALANCE SYSTEM ABSTRACT A block and tackle window sash balance system 10 has its friction made adjustable by a friction spring 20 and a cam 30 arranged for pressing spring 20 against a radial Pace of a pulley 15 in a high friction position and moving the spring clear of the pulley in a low friction position. Cam 30 is preferably accessible with a screwdriver for adjusting friction after the balance is installed in a window.

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