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Class Information
Number: 352/187
Name: Optics: motion pictures > Camera and/or projector drive mechanisms > With intermittently driven carrier-engaging sprocket
Description: Subject matter in which the power source drives the motion picture film through an intermittently rotated toothed drum or disc which engages perforations in the film strip.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7367676 |
Film feed mechanism in a motion-picture camera |
May. 6, 2008 |
| 6318861 |
Film positioning system and method thereof |
Nov. 20, 2001 |
| 6019473 |
Switchable format film projection system |
Feb. 1, 2000 |
| 6014198 |
Method for shortening the closure time and apparatus for executing same |
Jan. 11, 2000 |
| 5946076 |
Switchable pulldown film projection system |
Aug. 31, 1999 |
| 5923402 |
Tractor-type film transport apparatus |
Jul. 13, 1999 |
| 5875020 |
Motion picture projection system |
Feb. 23, 1999 |
| 5517262 |
Motion picture drive system |
May. 14, 1996 |
| 5333020 |
Sprocket wheel for advancing film and device for advancing film using said sprocket wheel |
Jul. 26, 1994 |
| 5266979 |
Film gate for continuous motion telecine |
Nov. 30, 1993 |
| 5187508 |
Film transport device |
Feb. 16, 1993 |
| 5175573 |
Film transport device |
Dec. 29, 1992 |
| 5110201 |
Film transport device |
May. 5, 1992 |
| 4863262 |
Motion picture projector with reduced picture jump |
Sep. 5, 1989 |
| 4702577 |
Film transport device |
Oct. 27, 1987 |
| 4360254 |
Camera having stepper motor driven film transport/registration sprocket |
Nov. 23, 1982 |
| 4253749 |
Electronic theater projector |
Mar. 3, 1981 |
| 4215921 |
Intermittent prime film mover using multi-toothed wheel drive |
Aug. 5, 1980 |
| 4149781 |
Sealed, super 8, optical sound, projection means |
Apr. 17, 1979 |
| 4105311 |
Film transport system |
Aug. 8, 1978 |
| 4087165 |
Film tension absorbing system |
May. 2, 1978 |
| 4063671 |
Film advancing mechanism |
Dec. 20, 1977 |
| 4022525 |
Intermittent film drive for motion picture projector |
May. 10, 1977 |
| 3972606 |
Advancement of film strips of different widths and/or sprocket hole sizes |
Aug. 3, 1976 |
| 3954214 |
Film projector |
May. 4, 1976 |
| 3947101 |
Mechanical drive arrangements |
Mar. 30, 1976 |
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