US3650489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear drive for a camera and film cartridge
Assignee: Eastman Kodak Co
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Filing: 1970-04-06
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Granted: 1972-03-21
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Expires: 1990-04-06
Abstract
Abstract A film cartridge housing encloses a core which is rotatably mounted therein. The housing extends over a gear carried by the spool and defines an opening through which a camera driving gear is insertable for engaging the spool gear and rotating the spool. In a preferred embodiment, the gear axes define a plane which is offset from a normal to the film plane by an angle equal to the pressure angle of the gears, thereby creating a line of force parallel to the film plane. By arranging for such line of force to pass through a cartridge-supporting surface in the camera at a position where the film cartridge contacts the surface, any tendency of the cartridge to be unseated from the supporting surface in response to the creation of a force component normal to the film plane is negated.
Inventors
- 👤 Richard J Bresson
- 👤 James E Dierks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:47
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/28; G03B17/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
A film cartridge adapted for use in apparatus having a drive member, the cartridge comprising: means defining a takeup chamber; a takeup core rotatably mounted in said takeup chamber; a gear drivingly connected to said takeup core, at least a portion of said gear being outside said takeup chamber; and a cover for said gear, said cover including (1) a plurality of walls partially enclosing said gear to avoid inadvertant displacement of said gear and (2) an opening to provide access to said gear from outside the cartridge, said opening being tapered outwardly to a larger dimension for guiding the drive member into engagement with said gear.
Claim 2
Dependent Claim
107 words
A film cartridge adapted for use in apparatus having a drive member, the cartridge comprising: means defining a takeup chamber; a takeup core rotatably mounted in said takeup chamber; a gear drivingly connected to said takeup core, at least a portion of said gear being outside said takeup chamber; and a cover for said gear, said cover including (1) a plurality of walls partially enclosing said gear to avoid inadvertant displacement of said gear and (2) an opening to provide access to said gear from outside the cartridge, said opening being tapered outwardly to a larger dimension for guiding the drive member into engagement with said gear.
Claim 3
Dependent Claim
32 words
A cartridge as set forth in claim 1 wherein: said takeup core and said gear are mounted for rotation about a common axis; and said opening is disposed radially of said axis.
Claim 4
Dependent Claim
138 words
A film cartridge adapted for use in apparatus having a drive member, the cartridge comprising: means defining a takeup chamber; a takeup core rotatably mounted in said takeup chamber; a gear having a root diameter and being drivingly connected to said takeup core, at least a portion of said gear being outside said takeup chamber; and a cover for said gear, said cover including (1) a plurality of walls partially enclosing said gear to avoid inadvertant displacement of said gear and (2) an opening to provide access to said gear from outside the cartridge, at least one of said walls being undercut in a region from its edge substantially to the root diameter of said gear thereby making said one wall dimensionally thinner in said region to ease positioning of the drive member into engagement with said gear.
Claim 5
Dependent Claim
138 words
A film cartridge adapted for use in apparatus having a drive member, the cartridge comprising: means defining a takeup chamber; a takeup core rotatably mounted in said takeup chamber; a gear having a root diameter and being drivingly connected to said takeup core, at least a portion of said gear being outside said takeup chamber; and a cover for said gear, said cover including (1) a plurality of walls partially enclosing said gear to avoid inadvertant displacement of said gear and (2) an opening to provide access to said gear from outside the cartridge, at least one of said walls being undercut in a region from its edge substantially to the root diameter of said gear thereby making said one wall dimensionally thinner in said region to ease positioning of the drive member into engagement with said gear.
Claim 6
Dependent Claim
32 words
A cartridge as set forth in claim 3 wherein: said takeup core and said gear are mounted for rotation about a common axis; and said opening is disposed radially of said axis.
Claim 7
Dependent Claim
169 words
A film cartridge adapted for use in apparatus having a drive member, the cartridge comprising: wall means defining a generally cylindrically shaped takeup chamber; a takeup core rotatably mounted in said takeup chamber; a gear drivingly connected to said takeup core, said gear (1) being substantially concentric with said takeup chamber, (2) having a diameter substantially less than the diameter of said takeup chamber, and (3) extending axially beyond said wall means outside said takeup chamber; and a generally cylindrically shaped cover on said wall means substantially concentric with said gear and said takeup chamber to enclose said gear, said cover (1) having a diameter substantially less than said takeup chamber but substantially greater than said gear and (2) defining with said wall means an opening disposed radially of said gear, whereby (1) said gear is substantially recessed behind the said opening and (2) said gear is substantially inaccessible accidently so as to avoid inadvertant displacement thereof but is readily accessible by the drive member to permit engagement thereby.
Claim 8
Dependent Claim
169 words
A film cartridge adapted for use in apparatus having a drive member, the cartridge comprising: wall means defining a generally cylindrically shaped takeup chamber; a takeup core rotatably mounted in said takeup chamber; a gear drivingly connected to said takeup core, said gear (1) being substantially concentric with said takeup chamber, (2) having a diameter substantially less than the diameter of said takeup chamber, and (3) extending axially beyond said wall means outside said takeup chamber; and a generally cylindrically shaped cover on said wall means substantially concentric with said gear and said takeup chamber to enclose said gear, said cover (1) having a diameter substantially less than said takeup chamber but substantially greater than said gear and (2) defining with said wall means an opening disposed radially of said gear, whereby (1) said gear is substantially recessed behind the said opening and (2) said gear is substantially inaccessible accidently so as to avoid inadvertant displacement thereof but is readily accessible by the drive member to permit engagement thereby.
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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |