Motorized bottom masking device for wide and/or curved motion pi

Details Motorized bottom masking device for wide and/or curved motion pi Motorized bottom masking device for wide and/or curved motion pi

1988-04-29

1990-04-10

Hayes, Monroe H.

Optics: motion pictures

Panoramic picture type

352 43, 350124, G03B 3700

Patent

active

049154966

ABSTRACT:
A motorized bottom masking assembly for variably masking a lower portion of a large curved picture projection screen, including a bottom mask movable to various heights along the lower portion of the screen having a rigid bar member defining the uppermost edge thereof, and at least three bar positioning lift assemblies located entirely below the bar member coupled to the bar member near opposite ends thereof and near the middle of the bar member. Each of the three lift assemblies include an elongated base track, a pair of lift arms arranged in upwardly converging inclined relation having lower end roller carrier assemblies guided by the associated base track movable toward and away from each other and having upper ends coupled together to the member, a lead screw coupled to the roller carrier assemblies, and a drive motor therefor for converging and diverging the associated pair of lift arms relative to each other to raise and lower the bar member relative to the base track.

REFERENCES:
patent: 3475086 (1969-10-01), Vetter

Affiliated with

Also associated with

Rating

Motorized bottom masking device for wide and/or curved motion pi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Motorized bottom masking device for wide and/or curved motion pi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motorized bottom masking device for wide and/or curved motion pi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2295907