Endless belt power transmission systems or components – Means for adjusting belt tension or for shifting belt,... – Guide roll mounted for movement of its axis along...
Patent
1988-08-04
1989-07-11
Bui, Thuy M.
Endless belt power transmission systems or components
Means for adjusting belt tension or for shifting belt,...
Guide roll mounted for movement of its axis along...
F16H 708
Patent
active
048467669
ABSTRACT:
A device for tensioning the cords of curtains, blinds or the like comprises a housing 1 and cover 3 defining a chamber 2 in which is slidably mounted a carriage 8 which has a boss 9 on which is rotatably mounted a pulley 10 for the cord 11 and a wheel 13 around which is wound a constant torque spring 17 the other shaped end of which is secured in a correspondingly shaped slot 18 formed in the end wall of the housing. The device is fixed to a wall or joinery by a screw 7 passing through a universally bore toggle 6.
REFERENCES:
patent: 55344 (1866-06-01), Nell
patent: 66084 (1867-06-01), Hessler
patent: 86634 (1869-02-01), Betts
patent: 147493 (1874-02-01), Fry
patent: 161407 (1875-03-01), Hall
Bui Thuy M.
Cope & Timmins Ltd.
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