Light-shielding device for a screen

Details Light-shielding device for a screen Light-shielding device for a screen

1994-01-19

1995-05-23

Wintercorn, Richard A.

Optical: systems and elements

Projection screen

Border, mask, shade, or curtain

348842, 359601, 359612, G03B 2156, H04N 564

Patent

active

054186420

ABSTRACT:
Collapsible light-shielding device (3) for a displaying screen (2), having a number of annular strips (5', 5) concentrically nested and essentially enclosing one another in a tight manner, which strips are suitable to be fixed in front of a displaying screen and in that case surround the screen. Furthermore, the strips are adapted to slide over one another between a pushed-in position, in which they essentially cover one another, and a pushed-out position, in which they are essentially uncovered. Preferably, the strips (5, 5') have a decreasing wall thickness, viewed in the axial direction.

REFERENCES:
patent: 1848879 (1932-03-01), Halbasch
patent: 2014322 (1935-09-01), Foulis et al.
patent: 2350110 (1944-05-01), Hood
patent: 2496752 (1950-02-01), Rose
patent: 2845835 (1958-08-01), Weiss

Affiliated with

Also associated with

Rating

Light-shielding device for a screen does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Light-shielding device for a screen, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light-shielding device for a screen will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2144267