US3685890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-format cinematographic apparatus
Assignee: Paillard SA
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Filing: 1970-09-14
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Granted: 1972-08-22
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Expires: 1990-09-14
Abstract
Abstract Cinematographic apparatus, e.g., film projector, can accommodate film of different formats, especially normal 8 mm and Super-8 film. A sensing device distinguishes between the film types by the differences in the configuration of the respective marginal perforations in the films. Specifically, the sensing device is in the form of a finger, forming one part of an electric contact and capable of penetrating through only one of the film types to engage the other part of the contact on the other side of the film. The finger controls the displacement of other elements necessary for the adaptation of the apparatus to different film formats.
Inventors
- 👤 Jaroslav Sekera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:19
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/42; G03B1/48; G03B1/50
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
103 words
A variable-format cinematographic apparatus for use with film having marginal perforations, including at least one displaceable element the position of which depends on the format of the film selected, means for controlling the position of said element, a device for detecting the format of the film placed in the apparatus, said device being operatively associated with the control means for automatically ensuring the adaptation of the apparatus to the format of the film that is being used, and a feeler element forming part of said device to cooperate with the perforations of the film to recognize a specific distinguishing characteristic of said perforations.
Claim 2
Dependent Claim
103 words
A variable-format cinematographic apparatus for use with film having marginal perforations, including at least one displaceable element the position of which depends on the format of the film selected, means for controlling the position of said element, a device for detecting the format of the film placed in the apparatus, said device being operatively associated with the control means for automatically ensuring the adaptation of the apparatus to the format of the film that is being used, and a feeler element forming part of said device to cooperate with the perforations of the film to recognize a specific distinguishing characteristic of said perforations.
Claim 3
Dependent Claim
79 words
Apparatus according to claim 1, in which the feeler element comprises a finger, means resiliently to press said finger against the film, the dimensions of this finger being such as to be capable of penetrating into the perforations of only one of the types of film, said finger being so located that at least a portion of the surface of the finger being situated outside the path of movemenT of the perforations of all the other types of film.
Claim 4
Dependent Claim
46 words
Apparatus according to claim 1, including electric contact means of which the feeler element constitutes one part, the other contact part situated on the other side of the film, and the contact is closed when said feeler element penetrates into a perforation of the film used.
Claim 5
Dependent Claim
42 words
Apparatus as claimed in claim 1, wherein said at least one displaceable element is a plate, there being projection apertures associated with the different film formats and connected to said plate so as to bring the appropriate one to a projecting position.
References Cited (Backward Citations)
DE1240395B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |