Patent US3574296A successfully refreshed from Google Patents.
US3574296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cassette for rollfilm cameras
Assignee: Rollei Werke Franke und Heidecke GmbH and Co KG
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Filing: 1968-09-23
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Granted: 1971-04-13
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Expires: 1988-09-23
Abstract
Abstract A rollfilm cassette for detachable mounting on the body portion of a camera. The cassette has a protective slide to be inserted in the cassette before removal from the camera, to prevent fogging of the film when the cassette is removed. An interlock responsive to the presence or absence of the protective slide prevents the release of the latch which unlatches the cassette from the camera body, unless the protective slide is properly inserted in the cassette. The cassette has a hollow backwall providing a chamber in which to keep the protective slide when the slide is removed from its protecting position so that exposures can be made on the film.
Inventors
- 👤 Claus Prochnow
- 👤 Kurt Bode
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:32
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B19/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
126 words
A photographic camera comprising a camera body and a cassette detachably mounted on said body, a slide guideway in said cassette, a protective slide manually movable into said guideway to a position protecting film in the cassette from light and withdrawable from said guideway when pictures are to be taken, a latch for holding said cassette in mounted position on said body, a latch releasing member manually movable to a releasing position to release said latch so that the cassette may be removed from the body, and means for blocking movement of said releasing member to a releasing position when said slide is not present in said guideway, and means operated by the insertion of a slide in said guideway for rendering said blocking means ineffective.
Claim 2
Dependent Claim
126 words
A photographic camera comprising a camera body and a cassette detachably mounted on said body, a slide guideway in said cassette, a protective slide manually movable into said guideway to a position protecting film in the cassette from light and withdrawable from said guideway when pictures are to be taken, a latch for holding said cassette in mounted position on said body, a latch releasing member manually movable to a releasing position to release said latch so that the cassette may be removed from the body, and means for blocking movement of said releasing member to a releasing position when said slide is not present in said guideway, and means operated by the insertion of a slide in said guideway for rendering said blocking means ineffective.
Claim 3
Dependent Claim
80 words
A construction as defined in claim 1, in which said means for blocking movement of said releasing member comprises a pivoted feeler member spring urged into a first position extending partially into said guideway when said slide is not present therein and displaced by the slide to a second position when said slide is in film protecting position in said guideway, said feeler member when in its first position serving to block movement of said releasing member to releasing position.
Claim 4
Dependent Claim
32 words
A construction as defined in claim 2, wherein said feeler member when in its second position serves as a limit stop for limiting excess movement of said releasing member beyond releasing position.
Claim 5
Dependent Claim
59 words
A construction as defined in claim 1, wherein said latch is a pivoted latch enclosed in an inaccessible position, and wherein said release member is a bar operatively connected to said pivoted latch and having an externally accessible end adapted for manual operation when the latch is to be released for removal of the cassette from the camera body.
Claim 6
Dependent Claim
29 words
A construction as defined in claim 1, wherein said cassette has a storage slot for receiving and retaining said protective slide when said slide is not in its guideway.
Claim 7
Dependent Claim
47 words
A construction as defined in claim 5, wherein said storage slot opens on a different side of said cassette from said slide guideway, so that movement of said slide into said storage slot is in a different direction from movement of said slide into said slide guideway.
Claim 8
Dependent Claim
106 words
A photographic film cassette for detachable connection with a camera body, said cassette comprising a slide guideway, a protective slide movable into said guideway to a position protecting film in the cassette from light and withdrawable from said guideway when pictures are to be taken, and a storage slot spaced from said guideway for receiving and holding said slide when it is withdrawn from said guideway, further including a hinged handle on said slide, and an external recess in a wall of said cassette adjacent said storage slot for accommodating said handle in an approximately flush position while said slide is stored in said storage slot.
Claim 9
Dependent Claim
106 words
A photographic film cassette for detachable connection with a camera body, said cassette comprising a slide guideway, a protective slide movable into said guideway to a position protecting film in the cassette from light and withdrawable from said guideway when pictures are to be taken, and a storage slot spaced from said guideway for receiving and holding said slide when it is withdrawn from said guideway, further including a hinged handle on said slide, and an external recess in a wall of said cassette adjacent said storage slot for accommodating said handle in an approximately flush position while said slide is stored in said storage slot.
Claim 10
Dependent Claim
140 words
A photographic film cassette for detachable connection with a camera body, said cassette comprising a slide guideway, a protective slide movable into said guideway to a position protecting film in the cassette from light and withdrawable from said guideway when pictures are to be taken, a pivoted latch member on said cassette for latching it to a camera body, a release bar on said cassette for actuation to release said latch member, and a blocking member spring urged to a position blocking said release bar to prevent actuation thereof to release said latch member, said blocking member having a portion in said slide guideway in position to be engaged by a slide moving in said guideway to a protecting position and moved thereby to an unblocking position so that said release bar may be actuated to release said latch member.
Claim 11
Dependent Claim
140 words
A photographic film cassette for detachable connection with a camera body, said cassette comprising a slide guideway, a protective slide movable into said guideway to a position protecting film in the cassette from light and withdrawable from said guideway when pictures are to be taken, a pivoted latch member on said cassette for latching it to a camera body, a release bar on said cassette for actuation to release said latch member, and a blocking member spring urged to a position blocking said release bar to prevent actuation thereof to release said latch member, said blocking member having a portion in said slide guideway in position to be engaged by a slide moving in said guideway to a protecting position and moved thereby to an unblocking position so that said release bar may be actuated to release said latch member.
References Cited (Backward Citations)
US1695382A
Cited
US2319530A
Cited
US2462683A
Cited
US2471522A
Cited
US2576811A
Cited
US2582044A
Cited
US2716929A
Cited
US2715358A
Cited
US3261276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |