US3622101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral antibackup mechanism in a motion picture film cartridge
Assignee: Eastman Kodak Co
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Filing: 1970-03-31
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Granted: 1971-11-23
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Expires: 1990-03-31
Abstract
Abstract A ratchet mechanism for preventing reverse rotation of a takeup spool in motion picture film cartridges of the type having a partition between supply and takeup chambers. The ratchet mechanism comprises a flexible pawl finger integrally formed as a part of the partition, and a ratchet associated with a spool for rotation therewith to cooperate with the pawl finger to prevent rotation of the spool in one direction and permit rotation in the opposite direction for winding up film.
Inventors
- 👤 Robert C Sutliff
- 👤 Archie J Tucker
- 👤 Richard L Bishop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:35
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/26; G03B17/265
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
114 words
A film cartridge for use in a motion picture camera, comprising: a housing defining an exposure aperture; a partition within said housing separating the interior of the housing into a supply chamber and a takeup chamber; a flexible pawl finger integral with said partition; guide means for guiding film advanced from the supply chamber past the exposure aperture to the takeup chamber; a takeup spool rotatably mounted in the takeup chamber for winding up advanced film; and ratchet means associated with the spool for rotation therewith, said ratchet means cooperating with said pawl finger to prevent rotation of the spool in one direction and permit rotation in the opposite direction for winding up film.
Claim 2
Dependent Claim
114 words
A film cartridge for use in a motion picture camera, comprising: a housing defining an exposure aperture; a partition within said housing separating the interior of the housing into a supply chamber and a takeup chamber; a flexible pawl finger integral with said partition; guide means for guiding film advanced from the supply chamber past the exposure aperture to the takeup chamber; a takeup spool rotatably mounted in the takeup chamber for winding up advanced film; and ratchet means associated with the spool for rotation therewith, said ratchet means cooperating with said pawl finger to prevent rotation of the spool in one direction and permit rotation in the opposite direction for winding up film.
Claim 3
Dependent Claim
110 words
A film cartridge for use in a motion picture camera, comprising: a housing defining an exposure aperture; a partition within said housing separating the interior of the housing into a supply chamber and a takeup chamber, said partition defining a flexible pawl finger; guide means for guiding film advanced from the supply chamber past the exposure aperture to the takeup chamber; a takeup spool rotatably mounted in the takeup chamber for winding up advanced film; and at least one ratchet tooth on said spool cooperatively associated with said pawl finger to prevent rotation of the spool in one direction and permit rotation in the opposite direction for winding up film.
Claim 4
Dependent Claim
110 words
A film cartridge for use in a motion picture camera, comprising: a housing defining an exposure aperture; a partition within said housing separating the interior of the housing into a supply chamber and a takeup chamber, said partition defining a flexible pawl finger; guide means for guiding film advanced from the supply chamber past the exposure aperture to the takeup chamber; a takeup spool rotatably mounted in the takeup chamber for winding up advanced film; and at least one ratchet tooth on said spool cooperatively associated with said pawl finger to prevent rotation of the spool in one direction and permit rotation in the opposite direction for winding up film.
Claim 5
Dependent Claim
202 words
A film cartridge for use in a motion picture camera and adapted for cooperation with a punch to unload film therefrom, said cartridge comprising: a housing defining an exposure aperture; a partition within said housing separating the interior of the housing into a supply chamber and a takeup chamber; a flexible pawl finger integral with said partition; a hub in the supply chamber for rotatably supporting a supply coil of film so that it can be withdrawn therefrom, said hub defining at least one opening on a predetermined path aligned with a portion of the pawl finger to permit passage of such a punch along that path into engagement with the pawl finger; guide means for guiding filM advanced from the supply chamber past an exposure aperture to the takeup chamber; a takeup spool rotatably mounted in the takeup chamber for winding up advanced film; and ratchet means associated with the spool for rotation therewith, said ratchet means cooperating with said pawl finger to prevent rotation of the spool in one direction and permit rotation in the opposite direction for winding up film, said pawl finger being disengageable from said ratchet means by engagement of such a punch advanced along the path.
Claim 6
Dependent Claim
202 words
A film cartridge for use in a motion picture camera and adapted for cooperation with a punch to unload film therefrom, said cartridge comprising: a housing defining an exposure aperture; a partition within said housing separating the interior of the housing into a supply chamber and a takeup chamber; a flexible pawl finger integral with said partition; a hub in the supply chamber for rotatably supporting a supply coil of film so that it can be withdrawn therefrom, said hub defining at least one opening on a predetermined path aligned with a portion of the pawl finger to permit passage of such a punch along that path into engagement with the pawl finger; guide means for guiding filM advanced from the supply chamber past an exposure aperture to the takeup chamber; a takeup spool rotatably mounted in the takeup chamber for winding up advanced film; and ratchet means associated with the spool for rotation therewith, said ratchet means cooperating with said pawl finger to prevent rotation of the spool in one direction and permit rotation in the opposite direction for winding up film, said pawl finger being disengageable from said ratchet means by engagement of such a punch advanced along the path.
Claim 7
Dependent Claim
114 words
A film cartridge for use in a motion picture camera, comprising; a housing defining an exposure aperture; a partition within said housing separating the interior of the housing into a supply chamber and a takeup chamber; a flexible pawl finger mounted within said housing; guide means for guiding film advanced from the supply chamber past the exposure aperture to the takeup chamber; a takeup spool rotatably mounted in the takeup chamber for winding up advanced film; and ratchet means associated with the spool for rotation therewith, said ratchet means cooperating with said pawl finger to prevent rotation of the spool in one direction and permit rotation in the opposite direction for winding up film.
Claim 8
Dependent Claim
114 words
A film cartridge for use in a motion picture camera, comprising; a housing defining an exposure aperture; a partition within said housing separating the interior of the housing into a supply chamber and a takeup chamber; a flexible pawl finger mounted within said housing; guide means for guiding film advanced from the supply chamber past the exposure aperture to the takeup chamber; a takeup spool rotatably mounted in the takeup chamber for winding up advanced film; and ratchet means associated with the spool for rotation therewith, said ratchet means cooperating with said pawl finger to prevent rotation of the spool in one direction and permit rotation in the opposite direction for winding up film.
Claim 9
Dependent Claim
112 words
A film cartridge for use in a motion picture camera, comprising: a housing defining an exposure aperture, the interior of said housing being partitioned into supply and takeup chambers; a flexible pawl finger integrally mounted on an interior wall of the cartridge; guide means for guiding film advanced from the supply chamber past the exposure aperture to the takeup chamber; a takeup spool rotatably mounted in the takeup chamber for winding up advanced film; and ratchet means associated with the spool for rotation therewith, said ratchet means cooperating with said pawl finger to prevent rotation of the spool in one direction and permit rotation in the opposite direction for winding up film.
Claim 10
Dependent Claim
112 words
A film cartridge for use in a motion picture camera, comprising: a housing defining an exposure aperture, the interior of said housing being partitioned into supply and takeup chambers; a flexible pawl finger integrally mounted on an interior wall of the cartridge; guide means for guiding film advanced from the supply chamber past the exposure aperture to the takeup chamber; a takeup spool rotatably mounted in the takeup chamber for winding up advanced film; and ratchet means associated with the spool for rotation therewith, said ratchet means cooperating with said pawl finger to prevent rotation of the spool in one direction and permit rotation in the opposite direction for winding up film.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |