Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1984-08-16
1986-02-11
Jillions, John M.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
16198, 2421075, B65H 7548
Patent
active
045694907
ABSTRACT:
A spring counterbalance mechanism suitable for counterbalancing window sashes or the like. In one embodiment of the invention, the device has two rotatable drums and a spring disposed within the drums. The spring is connected to a spring arbor on one drum and connected to the interior of the other drum to generate counterbalancing forces for resisting rotation of the two drums. Two rotatable reels are coupled to the drums by peripheral gear teeth on the drums and the reels, and cords are wound on the reels for transmitting the forces to loads. The hubs of the reels on which the cords are wound are substantially smaller than the drums. A clutch mechanism is provided for selectively decoupling the spring arbor from the drums, to permit presetting the spring tension by rotating the arbor without rotation of the drums. In an alternate embodiment, stronger and more uniform forces are obtained by providing two pairs of drums and two springs. The second pair of drums is coupled to the first pair by gear teeth, and the cords are wound on the second pair.
REFERENCES:
patent: 526945 (1894-10-01), Sauerburger
patent: 820962 (1906-05-01), Erb
patent: 826516 (1906-07-01), Law
patent: 1138738 (1915-05-01), Earll
patent: 1226843 (1917-05-01), Arvine
patent: 1414698 (1922-05-01), Karasiewicz
patent: 1669990 (1928-05-01), Mantz
patent: 1898584 (1933-02-01), Mantz
patent: 2117896 (1938-05-01), Mantz
patent: 2190098 (1940-02-01), Dautrick
patent: 2609193 (1952-09-01), Foster
patent: 2679659 (1954-06-01), Grupp
patent: 2718282 (1955-09-01), Davis
patent: 2767426 (1956-10-01), Grupp
patent: 2782456 (1957-02-01), Kenyon
patent: 2797435 (1957-07-01), Decker et al.
patent: 2833027 (1958-05-01), Foster
patent: 3033488 (1962-05-01), Weber
patent: 3146488 (1964-09-01), Dahlstrom
patent: 3335455 (1967-10-01), Anderson
patent: 3689004 (1972-09-01), Brown et al.
patent: 3716201 (1973-02-01), West
patent: 4088280 (1978-05-01), Arlauskas et al.
patent: 4159809 (1979-07-01), Rawson
patent: 4340190 (1982-07-01), Zavatkay
patent: 4340191 (1982-07-01), Zavatkay
Barnes Group Inc.
Jillions John M.
LandOfFree
Counterbalance mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Counterbalance mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Counterbalance mechanism will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1202078