Flexible or portable closure – partition – or panel – Automatic control – With starting or driving means
Patent
1992-12-17
1994-10-18
Johnson, Blair M.
Flexible or portable closure, partition, or panel
Automatic control
With starting or driving means
160 8, 160 9, 160133, 160310, E05F 1520
Patent
active
053559274
ABSTRACT:
The present invention is provided with a mechanism for controlling the opening and closing of a door comprising a speed reduction means for reducing a rotational speed. A high speed shaft is connected to the speed reduction means and is connectable to a means for rotating the input shaft, and a low speed output shaft is connected to the speed reduction means. A governor is mounted on the input shaft for limiting the rotational speed thereof, to also regulate the rotational speed of the output shaft. A brake is provided for preventing rotation of the output shaft, and a self-closing mechanism is operatively connected to the door. The self-closing mechanism is adapted for storing energy when the door is opened to an open position, and a connecting means operatively connects the output shaft to the self-closing mechanism. A releasing means is provided for releasing the brake to permit rotation of the output shaft under the urging of the self-closing mechanism whereby the self-closing mechanism releases the energy stored therein so as to close the door to a closed position when the brake is released by the releasing means.
REFERENCES:
patent: 774855 (1904-11-01), Smith
patent: 842968 (1907-02-01), McCloud
patent: 1585270 (1926-05-01), Stevenson
patent: 1594721 (1926-08-01), Gilmore
patent: 1621717 (1927-03-01), Grant et al.
patent: 1649797 (1927-11-01), Winn, Jr.
patent: 1658513 (1928-02-01), Bumbarger
patent: 1955826 (1934-04-01), Paul
patent: 2019084 (1935-10-01), Miller
patent: 2019085 (1935-10-01), Miller
patent: 2110231 (1938-03-01), McCloud
patent: 2173900 (1939-09-01), Dunn
patent: 2188509 (1940-01-01), Kavanagh et al.
patent: 2390117 (1945-12-01), Michelman
patent: 2564208 (1951-08-01), Michelman
patent: 2670065 (1954-02-01), Stevens, Jr.
patent: 2747661 (1956-05-01), Lucas
patent: 2934139 (1960-04-01), Wardlaw et al.
patent: 2946377 (1960-07-01), Zoll et al.
patent: 2957521 (1960-10-01), Greegor
patent: 2978019 (1961-04-01), Carlo
patent: 3090424 (1963-05-01), Carlo
patent: 3102580 (1963-09-01), Greegor
patent: 3207273 (1965-09-01), Jurin
patent: 3231005 (1966-01-01), Cookson et al.
patent: 3465805 (1969-09-01), Lyman
patent: 3490514 (1970-01-01), Duncan et al.
patent: 3512302 (1970-05-01), Sivin et al.
patent: 3522834 (1970-08-01), Corcoran
patent: 3613765 (1971-10-01), Sivin
patent: 3842892 (1974-10-01), Stieler
patent: 3955840 (1976-05-01), Rawles et al.
patent: 4112996 (1978-09-01), Fohl
patent: 4147197 (1979-03-01), Balley et al.
patent: 4219107 (1980-08-01), Ford
patent: 4341253 (1982-07-01), Eyerle
patent: 4738296 (1988-04-01), Hatch
patent: 4754795 (1988-07-01), Garrod
patent: 4809760 (1989-03-01), Lew
patent: 4848522 (1989-07-01), Wolf
patent: 5022452 (1991-06-01), Burrell
patent: 5203392 (1993-04-01), Shea
patent: 5263527 (1993-11-01), Marlatt et al.
Johnson Blair M.
McKeon Rolling Steel Door Company, Inc.
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