US3674192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film-driving roller with device for stopping the drive mechanism if the film is broken
Assignee: Framo Morat GmbH and Co KG
•
Filing: 1970-12-02
•
Granted: 1972-07-04
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Expires: 1990-12-02
Abstract
Abstract In an optical-electronic scanning device wherein a control film is passed by film driving means and a film cassette, a means for stopping the device when the film breaks.
Inventors
- 👤 Gernot Gottschall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:10
CPC Classifications
G; G06; G06K; G06K13/00; G06K13/18; G06K13/24; G03; G03B; G03B1/00; G03B1/42
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
148 words
In a film driving system having a baseplate and a plurality of means mounted for driving a film with perforations, a pressure sensitive drive means for tensioning said film and for stopping said film when tension is unloaded on said film comprising at least one resilient tension means, a toothed member mounted on a drive shaft adapted to rotate against the pull of said tension means, said tension means having one end cOnnected to a pin on said toothed member and the other end connected to a hub on said drive shaft, switch means normally in a closed position, and a pawl pivotably mounted on said hub adapted to hold said switch means in a closed position when the tension means is loaded and being pivoted by said pin when said tension means is unloaded so that said switch contact is open to deactivate driving of said film.
Claim 2
Dependent Claim
148 words
In a film driving system having a baseplate and a plurality of means mounted for driving a film with perforations, a pressure sensitive drive means for tensioning said film and for stopping said film when tension is unloaded on said film comprising at least one resilient tension means, a toothed member mounted on a drive shaft adapted to rotate against the pull of said tension means, said tension means having one end cOnnected to a pin on said toothed member and the other end connected to a hub on said drive shaft, switch means normally in a closed position, and a pawl pivotably mounted on said hub adapted to hold said switch means in a closed position when the tension means is loaded and being pivoted by said pin when said tension means is unloaded so that said switch contact is open to deactivate driving of said film.
Claim 3
Dependent Claim
14 words
The system according to claim 1 wherein said tension means is a tension spring.
Claim 4
Dependent Claim
26 words
The system according to claim 1 including a ball catch having a gearwheel attached to said drive shaft and spring loaded balls attached to said hub.
Claim 5
Dependent Claim
62 words
The system according to claim 1 wherein said pawl is pressed against said drive shaft of said pressure sensitive drive means by a leaf spring, said pawl being spaced from said pin when said compression means is decompressed and being moved away from said drive shaft by said pin against the force of said leaf spring when said compression spring is compressed.
Claim 6
Dependent Claim
89 words
The system according to claim 1 wherein said drive shaft is hollow, and includes a grooved rod mounted displaceably in said drive shaft by a compression spring for actuating said switch means, whereby said rod after being displaced against the force of said spring by means of said pawl engaging in the groove of said rod is capable of being locked in position and brought into a second position when the tension in the film is unloaded by said pawl being forced out of said groove by said spring.
Claim 7
Dependent Claim
43 words
A system according to claim 5 including a permanent magnet attached to one end of said rod, said magnet holding said switch means closed in one position of said rod, and holding said switch means open in the other position of said rod.
Claim 8
Dependent Claim
14 words
The system according to claim 1 wherein said system is in a film cassette.
Claim 9
Dependent Claim
30 words
The system according to claim 1 which includes a plurality of drive shafts having toothed discs for driving said film, all of said drive shafts rotating at the same speed.
Claim 10
Dependent Claim
27 words
The system according to claim 1 including a pressure roller mounted on said baseplate capable of moving in a reciprocating motion so as to change the film.
References Cited (Backward Citations)
US2514402A
Cited
US3123267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |