US3602606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film synchronizers
Assignee: ROBERT RIGBY Ltd
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Filing: 1969-08-25
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Granted: 1971-08-31
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Expires: 1989-08-25
Abstract
Abstract A synchronizer for sound and picture editing of motion pictures, which is provided with additional sprocket wheels which are spaced apart to allow an animated picture viewer to be interposed between the additional sprocket wheels level with the pickup positions or the synchronizer. A positive nonslip drive is provided between the synchronizer and the additional sprocket wheels to move the film past the viewing station of the viewer at the same rate as the sound track is drawn past the pickups on the synchronizer either backwards or forwards without loss of synchronism.
Inventors
- 👤 John Joseph Rigby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:55
CPC Classifications
G; G03; G03B; G03B31/00; G03B31/02; G03B35/00; G03B35/18; G03B35/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
159 words
In a cine film synchronizer comprising a number of sprocket wheels a main spindle to which said sprocket wheels are concentrically fixed, means for rotating said sprocket wheels together and means for holding a strip of perforated cine film or sound recording tape in driving engagement with each sprocket wheel, the improvement comprising two additional sprocket wheels arranged in a common plane parallel to that of the other sprocket wheels but spaced axially from them, the two additional sprocketwheels being spaced apart to allow an animated picture viewer to be interposed between the two additional sprocket wheels; with its illuminating station in line with the main spindle, drive means being provided at one end of the spindle which is operatively connected to both of the additional sprockets to effect a positive drive which enables them to move a strip of cine film past the viewer at the same speed as the sound recording tape is moved past the synchronizer.
Claim 2
Dependent Claim
159 words
In a cine film synchronizer comprising a number of sprocket wheels a main spindle to which said sprocket wheels are concentrically fixed, means for rotating said sprocket wheels together and means for holding a strip of perforated cine film or sound recording tape in driving engagement with each sprocket wheel, the improvement comprising two additional sprocket wheels arranged in a common plane parallel to that of the other sprocket wheels but spaced axially from them, the two additional sprocketwheels being spaced apart to allow an animated picture viewer to be interposed between the two additional sprocket wheels; with its illuminating station in line with the main spindle, drive means being provided at one end of the spindle which is operatively connected to both of the additional sprockets to effect a positive drive which enables them to move a strip of cine film past the viewer at the same speed as the sound recording tape is moved past the synchronizer.
Claim 3
Dependent Claim
33 words
A synchronizer as claimed in claim 1 in which the drive means comprise a toothed belt which engages with a corresponding toothed driving wheel on the main spindle and on the additional sprockets.
Claim 4
Dependent Claim
29 words
A synchronizer as claimed in claim 1 in which the additional sprockets are smaller than those on the synchronizer, a corresponding speed step-up being provided in the drive means.
Claim 5
Dependent Claim
33 words
A synchronizer as claimed in claim 1 in which a spring tensioner is fitted to one of the additional sprockets and is effective to tension the film between the two said additional sprockets.
Claim 6
Dependent Claim
72 words
Coupling apparatus for connecting to a synchronizer having a number of sprocket wheels relatively fixed to a common spindle, the apparatus comprising two additional sprocket wheels which are spaced apart to allow an animated picture viewer to be interposed between the additional sprockets, drive means being provided which is adapted to be fitted to the main spindle for effecting a positive drive between the main spindle and the two additional sprocket wheels.
Claim 7
Dependent Claim
72 words
Coupling apparatus for connecting to a synchronizer having a number of sprocket wheels relatively fixed to a common spindle, the apparatus comprising two additional sprocket wheels which are spaced apart to allow an animated picture viewer to be interposed between the additional sprockets, drive means being provided which is adapted to be fitted to the main spindle for effecting a positive drive between the main spindle and the two additional sprocket wheels.
Claim 8
Dependent Claim
38 words
Apparatus as claimed in claim 5 in which the positive drive means comprises a toothed belt engaging with a toothed wheel adapted to be mounted on the main spindle and corresponding toothed wheels connected to the additional sprockets.
Claim 9
Dependent Claim
20 words
Apparatus as claimed in claim 5 in which a spring tensioner is fitted to one of the two additional sprockets.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |