Optical: systems and elements – Projection screen – Roll up screen
Patent
1992-09-04
1993-12-28
Wintercorn, Richard A.
Optical: systems and elements
Projection screen
Roll up screen
G03B 2156
Patent
active
052744990
ABSTRACT:
A casing for a projection screen and a motorized projection screen system and method for controlling the same are disclosed herein. The casing includes a fascia and endcaps which are affixed to the casing spine without the use of tools thereby providing easy access to the working components housed within the casing and providing flexibility to the consumer in the appearance of the casing. The motorized projection screen system includes a roller having a projection screen attached thereto and a reversible motor operatively connected to the roller such that rotation of the motor causes the roller to rotate and the projection screen to be raised or lowered. The system also includes a biasing mechanism operatively connected to the roller such that rotation of the roller to lower the projection screen biases the roller toward rotation in the opposite direction. The biasing mechanism reduces the power requirements of the reversible motor of the system as it assists in lifting the weight of the projection screen. Furthermore, in one embodiment, the motor utilized is a DC motor and the system includes a DC power supply thereby providing a portable system and eliminating the requirement to connect the system to an external power supply.
REFERENCES:
patent: 3640603 (1972-02-01), Balmes
patent: 4045123 (1977-08-01), Brown
patent: 4059339 (1977-11-01), Brown
patent: 4060310 (1977-11-01), Brown
patent: 4072404 (1978-02-01), Brown
patent: 4110003 (1978-08-01), Zinn
patent: 4159162 (1979-06-01), Christoffel
patent: 4169658 (1979-10-01), Brown
patent: 4739567 (1988-04-01), Carlson
Ambassador, Draper Shade & Screen Co., Inc. product brochure, 1990.
Lumalectric, Draper Shade & Screen Co., Inc. product brochure, 1990.
Rolleramic, Draper Shade & Screen Co., Inc. product brochure, 1990.
Envoy, Draper Shade & Screen Co., Inc. product brochure.
Targa, Draper Shade & Screen Co., Inc. product brochure.
New Screens for New Technologies, Draper Shade & Screen Co., Inc. product brochure, 1989.
Draper Shade & Screen Co., Inc.
Wintercorn Richard A.
LandOfFree
Battery operated projection screen with spring assisted roller a does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Battery operated projection screen with spring assisted roller a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Battery operated projection screen with spring assisted roller a will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1547510