Patent US3580667A successfully refreshed from Google Patents.
US3580667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Entertainment system
Assignee: Individual
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Filing: 1968-10-09
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Granted: 1971-05-25
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Expires: 1988-10-09
Abstract
Abstract Entertainment system including movie projection apparatus having enlarged film storage capacity, whereby multiple full length movies may be stored and shown in any sequence, and which is constructed as a unit for installation and use in passenger carriers such as aircraft, or in other places where space is limited.
Inventors
- 👤 Robert D Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:38
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/02; G03B21/04; G03B21/14; G03B21/32
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
362 words
Projection system, comprising a motion picture projector having a film gate through which film is moved frame by frame by advancing claws for projection, means for moving said film gate clear of the advancing claws for fast film movements in both forward and rewind film movement directions, first reel means for storing film wound thereon for projection and for receiving film during rewind, second reel means for receiving film during projection and from which film is delivered during rewind, driven sprocket means disposed between each said reel means and said film gate for feeding film to said film gate and for withdrawing film from said film gate during film movements in both forward and rewind film movement directions, projector drive motor means for driving said driven sprocket means to move the film at slow forward projection speed through said film gate with said claws advancing said film frame by frame therethrough for projection and for moving the film at fast forward and rewind speeds to advance and rewind the film rapidly clear of said advancing claws, said sprocket means being driven at corresponding speeds and maintaining constant film length therebetween through said film gate whereby the film is not excessively tensioned during said movements thereof, said sprocket means comprising, at each side of said film gate, a driven projector film sprocket spaced from said film gate to enable formation of a film loop between the projector film sprocket and the film gate and a secondary driven film sprocket spaced from the projector film sprocket adjacent one of said reel means, said advancing claws and all of said sprocket means being Driven by a projector motor means whereby their film moving speeds correspond and film tension remains constant therethrough; and including separate reel motor means for each said reel means for drawing film arriving at the respective reel onto the reel at predetermined torque and film tension; and including brake means for stopping rotations of said reels when said projector motor is stopped; whereby film tensions are maintained uniform throughout the system and likelihood of film damage and breakage is minimized even during said fast film forward and fast film rewind film movements.
Claim 2
Dependent Claim
362 words
Projection system, comprising a motion picture projector having a film gate through which film is moved frame by frame by advancing claws for projection, means for moving said film gate clear of the advancing claws for fast film movements in both forward and rewind film movement directions, first reel means for storing film wound thereon for projection and for receiving film during rewind, second reel means for receiving film during projection and from which film is delivered during rewind, driven sprocket means disposed between each said reel means and said film gate for feeding film to said film gate and for withdrawing film from said film gate during film movements in both forward and rewind film movement directions, projector drive motor means for driving said driven sprocket means to move the film at slow forward projection speed through said film gate with said claws advancing said film frame by frame therethrough for projection and for moving the film at fast forward and rewind speeds to advance and rewind the film rapidly clear of said advancing claws, said sprocket means being driven at corresponding speeds and maintaining constant film length therebetween through said film gate whereby the film is not excessively tensioned during said movements thereof, said sprocket means comprising, at each side of said film gate, a driven projector film sprocket spaced from said film gate to enable formation of a film loop between the projector film sprocket and the film gate and a secondary driven film sprocket spaced from the projector film sprocket adjacent one of said reel means, said advancing claws and all of said sprocket means being Driven by a projector motor means whereby their film moving speeds correspond and film tension remains constant therethrough; and including separate reel motor means for each said reel means for drawing film arriving at the respective reel onto the reel at predetermined torque and film tension; and including brake means for stopping rotations of said reels when said projector motor is stopped; whereby film tensions are maintained uniform throughout the system and likelihood of film damage and breakage is minimized even during said fast film forward and fast film rewind film movements.
Claim 3
Dependent Claim
23 words
The combination of claim 1, said fast film speeds being in the range of about 5 to 25 times the projection film speed.
Claim 4
Dependent Claim
167 words
The combination of claim 1, said means for moving the film gate clear of the advancing claws of the projector, said film gate having an element at each side of the film disposed therethrough, comprising slidable mounting means for one gate element enabling movement thereof away from the other gate element, rack means carried by said one gate element, electric motor driven gear means engaging said rack means operable to move said rack means and one gate element against and away from said other gate element, the advancing claws extending through said other gate element to engage the film when said one gate element is moved thereagainst, said other gate element being spring-biased to move clear of said film advancing claws when said one gate element is moved away therefrom, and means for actuating said motor to move said one gate element against said other gate element during projection of the film and away from said other gate element during said fast forward and rewind film movements.
Claim 5
Dependent Claim
99 words
The combination of claim 3, including, at each end of said film gate between said film gate and said driven projector film sprocket, a movable film loop restorer roller means spring biased to inoperative position and solenoid-actuated to temporarily move away from said film gate to restore the film loop at that end of the film gate, said loop restorer rollers being simultaneously actuated to move away from the film gate as described by film tension thereover and said actuation being terminated upon full moving away of said rollers so that thereafter said rollers resume said inoperative positions thereof.
Claim 6
Dependent Claim
137 words
The combination of claim 4, including film cleaning means comprising a pair of spaced rollers disposed oppositely out of line of the path of said film between one said projector sprocket and secondary sprocket and having said film disposed outwardly around each roller of said pair with one roller at one side of the film and the other roller at the other side of the film, a pair of spools associated with each roller of said pair for passage therebetween of a cleaning strip passed over the roller beneath the film thereon, and means for rotating said spools to change the cleaning strip areas contacted by the film each time operation of said projector is altered, whereby the film is wiped at each side over said strips on said rollers during each film movement in either direction.
Claim 7
Dependent Claim
100 words
The combination of claim 5, including base means supporting said projector, frame means carried upon said base supporting said secondary sprocket means, said reel means, and said film cleaning means, guide roller means for guiding film movements between each of said projector and secondary sprockets, releasable means for maintaining the film in place on each said guide roller means, housing means having an open side to removably receive said frame means into said housing means with said base engaged around the open side of said housing means, and an aperture through said housing permitting light projection therethrough by said projector.
Claim 8
Dependent Claim
130 words
The combination of claim 6, each said means for maintaining the film in place on a guide roller means comprising a spring wire anchored at one end at the end of the roller axis and extending therefrom transverse to said axis and havIng a helically formed portion outwardly of said axis, the other end of said wire extending from said helically formed portion across the width of the roller to terminate in a loop formation and having therearound a roll formed of antifriction material disposed between the roller flanges to hold film on the roller but spaced from the roller surface and film, said roll being resiliently movable away from the roller by an outward pull on said loop whereby film may be installed on and removed from said roller.
Claim 9
Dependent Claim
107 words
The combination of claim 6, said system including control means comprising electric motor driven camoperated switch means for actuating said apparatus in said slow forward projection operation, in fast film advance operation, and in fast film rewind operation; switch means for moving said cam-operated switch means to positions for said projection operation and said fast film advance operation; notch actuated switch means for shutting off said apparatus at the end of each motion picture of which the film is made up, and for automatically moving said cam-operated switch means to position for fast film rewind operation at the end of the last motion picture of the film.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |