US3386636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low power intermittent drive with gear assist
Assignee: Bell and Howell Co
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Filing: 1966-07-21
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Granted: 1968-06-04
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Expires: 1986-07-21
Abstract
No abstract record available.
Inventors
- 👤 Frank C Badalich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:48
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/08; G03B23/12; G03B1/00; G03B1/18; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1503; Y10T74/18; Y10T74/18528; Y10T74/19; Y10T74/1987; Y10T74/19879
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A WEB ADVANCING MECHANISM ADAPTED FOR A FILM STRIP PROJECTION APPARATUS IN WHICH INDIVIDUAL FILM FRAMES COMPRISING SAID WEB ARE INTERMITTENTLY MOVED TO PROJECTION POSITION IN RESPONSE TO SEPARATE CONTROLLED MOTIVATING TORQUES, THE WEB ADVANCING MECHANISM COMPRISING A SPROCKET SHAFT; SPROCKET MEANS MOUNTED FOR COROTATION WITH SAID SPROCKET SHAFT AND ADAPTED FOR ENGAGEMENT WITH A FILM STRIP FOR ADVANCEMENT THEREOF; A PAIR OF GEARS ARRANGED IN DRIVING AND DRIVEN RELATIONSHIP TO ROTATE SAID SPROCKET SHAFT, SAID GEARS RESPECTIVELY HAVING A CURVED CAM TRACK AND COMPRISING CAM FOLLOWER MEANS ARRANGED FOR COACTION TO CAUSE RELATIVE ROTATION OF SAID GEARS ONLY DURING A PORTION OF EACH CYCLE OF THE DRIVING OF SAID GEARS, AND AUXILIARY GEAR CONTROL MEANS ARRANGED BEYOND SAID CAM TRACK TO CAUSE SAID GEARS TO ROTATE TOGETHER WHEN IN NON-CAM DRIVING RELATIONSHIP AND UPON MOVEMENT OF THE DRIVEN GEAR.
Claim 2
Dependent Claim
140 words
A WEB ADVANCING MECHANISM ADAPTED FOR A FILM STRIP PROJECTION APPARATUS IN WHICH INDIVIDUAL FILM FRAMES COMPRISING SAID WEB ARE INTERMITTENTLY MOVED TO PROJECTION POSITION IN RESPONSE TO SEPARATE CONTROLLED MOTIVATING TORQUES, THE WEB ADVANCING MECHANISM COMPRISING A SPROCKET SHAFT; SPROCKET MEANS MOUNTED FOR COROTATION WITH SAID SPROCKET SHAFT AND ADAPTED FOR ENGAGEMENT WITH A FILM STRIP FOR ADVANCEMENT THEREOF; A PAIR OF GEARS ARRANGED IN DRIVING AND DRIVEN RELATIONSHIP TO ROTATE SAID SPROCKET SHAFT, SAID GEARS RESPECTIVELY HAVING A CURVED CAM TRACK AND COMPRISING CAM FOLLOWER MEANS ARRANGED FOR COACTION TO CAUSE RELATIVE ROTATION OF SAID GEARS ONLY DURING A PORTION OF EACH CYCLE OF THE DRIVING OF SAID GEARS, AND AUXILIARY GEAR CONTROL MEANS ARRANGED BEYOND SAID CAM TRACK TO CAUSE SAID GEARS TO ROTATE TOGETHER WHEN IN NON-CAM DRIVING RELATIONSHIP AND UPON MOVEMENT OF THE DRIVEN GEAR.
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) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |