Movable or removable closures – With safety brake or catch
Patent
1988-12-05
1990-08-07
Brittain, James R.
Movable or removable closures
With safety brake or catch
192 56R, 192150, 49325, 49279, E05D 1304
Patent
active
049456784
ABSTRACT:
A window operator has a prime mover for opening and closing of a window, with the prime mover being drivingly connected to a drive output member through an intermediate gear structure. A clutch device in the drive structure senses the torque applied to the drive output member in a window closing operation and a switch operable by the clutch is effective to deenergize the prime mover when the torque applied to the output member reaches a predetermined value. The switch can be adjustably located relative to the clutch whereby the predetermined value at which the motor will be deenergized may be varied in order to obtain a desired tension on a member connected to the closed sash of the window, such as a chain connected to the sash of a skylight window.
REFERENCES:
patent: 2905464 (1959-09-01), Shaw, Sr.
patent: 4159598 (1979-07-01), Gatland
patent: 4481735 (1984-11-01), Jentoft
patent: 4521993 (1985-06-01), Tacheny et al.
patent: 4553656 (1985-11-01), Lense
patent: 4860493 (1989-08-01), Lense
Alden Allen J.
Berner John M.
Campbell Frank W.
Stender Eric C.
Anderson Gerald A.
Brittain James R.
Truth Incorporated
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