Flexible or portable closure – partition – or panel – Roll type – With rotating means
Patent
1980-09-29
1984-01-10
Caun, Peter M.
Flexible or portable closure, partition, or panel
Roll type
With rotating means
160321, 24116A, 474154, 474203, E06B 920, F16G 1500
Patent
active
044248520
ABSTRACT:
A bead-chain drive system for operating and positioning a window shade comprises a roller having a window shade mounted thereon, the roller being urged by the weight of the window shade in a direction to lower the shade. The drive system further includes a sprocket for driving the roller that is driven by a bead-chain, trained about the sprocket. The bead-chain includes a chain length urged toward the sprocket by the weight of the shade applied to the roller and the sprocket. The drive system also includes a bead-chain retainer having a holding device operative to hold at least one of the beads of the chain length against movement toward the sprocket to position the window shade and from which the chain length can be easily freed upon movement thereof away from the sprocket. The bead-chain retainer further has a bead engagement and guiding device operative upon release of the chain length to engage a bead of the length and guide this bead into engagement with the holding device to stop further movement of the chain length toward the sprocket and to prevent further lowering of the window shade.
REFERENCES:
patent: 1541261 (1925-06-01), Harris
patent: 1546848 (1925-07-01), Lundgren
patent: 1820503 (1931-08-01), Senior
patent: 2005334 (1935-06-01), Caspar
patent: 2165492 (1939-07-01), Lorentzen
patent: 2250957 (1941-07-01), Hunter
patent: 2383015 (1945-08-01), Pratt
patent: 2564831 (1951-08-01), Butkus
patent: 2577046 (1951-12-01), Svirsky
patent: 2749976 (1956-06-01), Lewis
patent: 2791911 (1957-05-01), Wasko
patent: 2894578 (1959-07-01), Caesar et al.
patent: 3104700 (1963-09-01), Polsky
patent: 3424224 (1969-01-01), Lowe
patent: 4020889 (1977-05-01), Karoll
patent: 4139044 (1979-02-01), Brolin
patent: 4223714 (1980-09-01), Weinrich
Caun Peter M.
Lieberman Cherney S.
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