Projection screen arrangement

Details Projection screen arrangement Projection screen arrangement

1982-03-15

1983-11-22

Wintercorn, Richard A.

Flexible or portable closure, partition, or panel

Fabric fastening means

To elongated element

160 24, 160238, 160328, G03B 2156

Patent

active

044165110

ABSTRACT:
A projection screen arrangement has a housing mounting a rotary roller for winding in and unwinding a projection screen. A rotary knob which is actuable from the outside of the housing is non-rotatably connected to the roller for tensioning the projection screen in the extended position, while a terminal bar member is provided at the end of the projection screen remote from the roller. A push member is mounted for radial movement in the housing and is adapted to be actuated against a spring loading by the terminal bar member when the projection screen is fully wound into the housing. The push member displaces a detent member which co-operates with a further detent means which is non-rotatable with respect to the rotary knob, for locking the roller in the winding-in direction, whereby the winding of the projection screen on the roller in the fully wound-in condition can be slackened, without the spring loading the roller in the winding-in direction re-tightening the projection screen wound on the roller.

REFERENCES:
patent: 3942868 (1976-03-01), Hoffbauer et al.
patent: 4060310 (1977-11-01), Brown
patent: 4072404 (1978-02-01), Brown
patent: 4159162 (1979-06-01), Christoffell
patent: 4312568 (1982-01-01), Weinberg

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