Claims
- 1. A photographic camera comprising;.
- a film exposing mechanism, and a film advancing mechanism, wherein the film exposing mechanism includes an exposure initiation member and the film exposing mechanism is operative to complete an exposure in response to movement of the exposure initiation member; and
- brake means responsive to movement of the exposure initiation member for applying a brake to the film advancing mechanism to brake said film advancing mechanism and thereby a film in the camera against movement during the exposure.
- 2. The camera of claim 1, including a casing for establishing an enclosure for said camera, said exposure initiation member including a depressible button accessible from outside the casing, and said brake means including an abutment moveable in response to depression of said button into engagement with the film advancing mechanism.
- 3. The camera of claim 2, including means for establishing a bias for biasing said button against depression, and said bias removing said abutment from engagement with the film advancing mechanism when said button is released.
- 4. The camera of claim 3, wherein said film advancing mechanism includes a thumb wheel, and said engagement is between said abutment and said wheel.
- 5. The camera of claim 4, wherein said depression of said button captures said wheel between said abutment and an opposed camera element opposite said wheel from said abutment.
- 6. A photographic camera comprising:
- a film exposing mechanism;
- a film advancing mechanism for sequentially positioning successive frames of a film at an exposure position;
- a film metering mechanism for resisting movement of one of the successive frames beyond the exposure position;
- a movable exposure initiation member for actuating said exposing mechanism to expose the film and releasing said metering mechanism to permit advancing of the next successive frame to the exposure position; and
- brake means responsive to movement of the exposure initiation member for applying a brake to the film advancing mechanism when the metering mechanism is released to arrest film movement otherwise permitted by said release.
- 7. The camera of claim 6, including a resilient anti-backup element engaging the film advancing mechanism to prevent film back-up from the exposure position, said brake means arresting film movement caused by the resiliency of said anti-backup element when the metering mechanism is released.
- 8. The camera of claim 7, and a casing establishing an enclosure for said camera, said exposure initiation member is a depressible button accessible from outside the casing, and in response to depression of said button, said button moves an abutment into engagement with the film advancing mechanism.
- 9. The camera of claim 8, wherein said button is on a lever arm pivoted at one end, and said abutment is between said button and said pivot.
- 10. The camera of claim 9, wherein said film advancing mechanism includes a rotatable disk, and said engagement is between said abutment and said disk.
- 11. The camera of claim 10, and including a camera element located opposite said disk from said abutment and wherein said depression of said button captures said disk between said abutment and the camera element.
- 12. A photographic camera for exposing successive frames on a film strip at an exposure position; said camera comprising:
- a film exposing mechanism including a shutter;
- a film advancing mechanism including a disk rotatable sequentially to move the successive frames into the exposure position;
- a film metering mechanism, said metering mechanism including a rotatable element rotatable by the film movement and a lever cooperating with said rotatable element sequentially to arrest movement of the successive frames beyond the exposure position;
- an exposure initiation member moveable to actuate said shutter to expose a film frame in the exposure position and to release said metering mechanism to permit movement of the next successive frame to the exposure position; and
- a brake moveable with said member to engage said disk to prevent movement of said disk during the exposure.
- 13. The camera of claim 12, wherein said exposure initiation member is operative to release said metering mechanism while said brake engages said disk.
- 14. A method of assembling a photographic camera with a film cartridge including a film strip; said method comprising:
- providing a core structure including a film supply chamber and a take-up chamber;
- assembling a thumb wheel adjacent the take-up chamber rotatable for rewinding the film strip from the supply chamber into the take-up chamber;
- loading the film cartridge into the take-up chamber in engagement with said thumb wheel and prewinding the film strip from the cartridge into the supply chamber;
- assembling a moveable exposure initiation member that includes a brake spaced from said thumb wheel opposite said thumb wheel from the take-up chamber, said member being movable to move said brake into engagement with said thumb wheel when said member is moved to initiate an exposure.
- 15. The method of claim 14, wherein said camera includes a film metering mechanism, and said method includes the step of defeating said mechanism during prewinding of the film from the cartridge to the supply chamber.
- 16. A method of making a single-use camera from previously used camera parts, said method comprising:
- obtaining a camera core including a film supply chamber and a take-up chamber from a previously used camera;
- assembling a rotatable thumb wheel on said core adjacent said take-up chamber;
- loading a film cartridge containing an unexposed film strip into the take-up chamber in engagement with said thumb wheel, and prewinding at least a substantial portion of the film strip into the supply chamber;
- assembling a moveable exposure initiation member on said core spaced from said thumb wheel opposite said thumb wheel from said take-up chamber, and positioning said member on said core so that said member is movable into engagement with said thumb wheel when said member is moved to initiate an exposure.
- 17. The method of claim 16, wherein said camera includes an anti-backup mechanism engaging said thumb wheel, and said method includes the step of defeating said mechanism during prewinding of the film from the cartridge to the supply chamber.
- 18. A photographic camera comprising:
- a camera core including a film supply chamber and a film take-up chamber;
- a film metering mechanism including a toothed thumb wheel mounted for rotation, a toothed sprocket for engaging perforations in a segment of a film strip locatable between the supply chamber and the take-up chamber, a metering lever including means for engaging toothed projections on the thumb wheel and means coupled with the sprocket to block rotation of the thumb wheel in a film advancing direction when an image frame of the film strip is positioned in a location for exposure, anti-backup means for blocking rotation of the thumb wheel in a direction opposite of that for film advance;
- an exposure mechanism including a shutter mechanism and an exposure initiation member, the exposure initiation member including a first means responsive to movement of the exposure initiation member for actuating the shutter mechanism to commence an exposure and a second means for releasing the metering lever from engagement with the thumb wheel; and
- means responsive to movement of said exposure initiation member for engaging said thumb wheel during an exposure to brake the thumb wheel and block rotation of the thumb wheel to reduce movement of the film strip during exposure.
- 19. The camera of claim 18 and wherein the core includes means for supporting the thumb wheel for rotation on the core above the film take-up chamber and the thumb wheel is located between a structure on the exposure initiation member and the core, and upon movement of the exposure initiation member to initiate an exposure the thumb wheel is pinched by the structure on the exposure initiation member and the core and thereby blocked from rotation during exposure.
- 20. The camera of claim 18 and wherein the structure on the exposure initiation member includes a depending appendage that extends downwardly from the exposure initiation member towards the thumb wheel and engages the thumb wheel during the exposure.
- 21. The camera of claim 18 in combination with a film cartridge that is located in the film take-up chamber and a film strip extends between said film supply chamber and said film take-up chamber.
- 22. A method of operating a photographic camera comprising;
- sequentially positioning successive frames of a film at an exposure position by operating a film advancing mechanism that is accessible for manual movement by a camera operator;
- operating, for each film frame, a film metering mechanism for resisting movement of the film frame beyond the exposure position;
- operating, for each film frame, a manually movable exposure initiation member to actuate an exposure mechanism to expose the film frame and to release said metering mechanism from resisting movement of the film frame to permit advancing of a next successive frame to the exposure position; and
- applying a brake to the film advancing mechanism, which brake is maintained through application of a force by the camera operator on the exposure initiation member when the metering mechanism is released to arrest film movement otherwise permitted by said release.
- 23. The method of claim 22, and engaging the film advancing mechanism with a resilient anti-backup element to prevent film back-up, and said brake arrests film movement caused by the resiliency of said anti-backup element when the film metering mechanism is released.
Parent Case Info
This is a Continuation of application Ser. No. 08/333,818, filed Nov. 3, 1994, now abandoned.
US Referenced Citations (4)
Continuations (1)
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Number |
Date |
Country |
Parent |
333818 |
Nov 1994 |
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