US3880504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure relief mechanism
Assignee: Eastman Kodak Co
•
Filing: 1972-10-03
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Granted: 1975-04-29
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Expires: 1992-10-03
Abstract
Abstract A sound motion picture camera which is adapted to receive a film cartridge to record both images and sound onto a film strip carried by the cartridge includes a capstan and a cooperating pressure roller to advance the film continuously past the sound recording head of the camera as an image sequence is being filmed. In the cartridge chamber of the camera the capstan is rotatably positioned along the film path and the pressure roller is rotatably secured to a retractable device which is adapted to be moved between a first position wherein the roller is in resilient contact with the capstan when the trigger mechanism of the camera is depressed and a second position wherein the pressure roller is separated from the capstan when the trigger mechanism is no longer actuated.
Inventors
- 👤 Edgar Samuel Marvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:03
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/18; G03B31/00; G03B31/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
294 words
For a motion picture camera having a film path leading past a sound recording head for recording of sound onto a received film strip, a film advancing mechanism for driving said film past said sound recording head, said film advancing mechanism comprising: a. a capstan adapted to be operatively driven at substantially a uniform speed, said capstan being positioned along said film path; b. a pressure roller adapted to be moved between (1) a first position wherein the pressure roller is a spaced distance from said capstan such that a received film strip may be freely positioned and removed from between said pressure roller and said capstan and (2) a second position wherein the pressure roller is in resilient contact with said capstan and a received film strip for driving the film strip therebetween; c. a mounting bracket for supporting said pressure roller, said bracket being movably secured to the motion picture camera relative to said film path for permitting said pressure roller to be moved between said first and second positions; d. a trigger mechanism mounted for movement between (1) a first position wherein said mechanism is ineffective to cause said capstan to be driven, and (2) a second position wherein said mechanism is effective to cause said capstan to be driven at substantially a uniform speed; and e. spring means connected to said mounting bracket and engageable by said trigger mechanism as said mechanism moves from its first position to its second position to urge said bracket in a direction to move said pressure roller to its second position, said trigger mechanism being disengaged from said spring means as said mechanism moves from its second position to its first position, thereby relieving the force exerted on said capstan by said pressure roller.
Claim 2
Dependent Claim
294 words
For a motion picture camera having a film path leading past a sound recording head for recording of sound onto a received film strip, a film advancing mechanism for driving said film past said sound recording head, said film advancing mechanism comprising: a. a capstan adapted to be operatively driven at substantially a uniform speed, said capstan being positioned along said film path; b. a pressure roller adapted to be moved between (1) a first position wherein the pressure roller is a spaced distance from said capstan such that a received film strip may be freely positioned and removed from between said pressure roller and said capstan and (2) a second position wherein the pressure roller is in resilient contact with said capstan and a received film strip for driving the film strip therebetween; c. a mounting bracket for supporting said pressure roller, said bracket being movably secured to the motion picture camera relative to said film path for permitting said pressure roller to be moved between said first and second positions; d. a trigger mechanism mounted for movement between (1) a first position wherein said mechanism is ineffective to cause said capstan to be driven, and (2) a second position wherein said mechanism is effective to cause said capstan to be driven at substantially a uniform speed; and e. spring means connected to said mounting bracket and engageable by said trigger mechanism as said mechanism moves from its first position to its second position to urge said bracket in a direction to move said pressure roller to its second position, said trigger mechanism being disengaged from said spring means as said mechanism moves from its second position to its first position, thereby relieving the force exerted on said capstan by said pressure roller.
Claim 3
Dependent Claim
148 words
Means for controlling the engagement and disengagement between a movable pressure roller and a capstan rotatable about a fixed axis, the mechanism comprising: a bracket rotatably supporting the roller for movement between a retracted position wherein the roller is spaced from the capstan and an engaged position wherein the roller is in pressure engagement with the capstan; means for moving the bracket from its retracted position to its engaged position and for urging the roller against the capstan comprising a trigger member movable between an engaged position wherein said capstan is rotatably driven and a disengaged position wherein said capstan is not driven, and resilient means having a portion located to be engaged by the trigger member in response to movement of the trigger member to its engaged position for concurrently exerting a force on the bracket in a direction to urge the bracket toward its engaged position.
Claim 4
Dependent Claim
148 words
Means for controlling the engagement and disengagement between a movable pressure roller and a capstan rotatable about a fixed axis, the mechanism comprising: a bracket rotatably supporting the roller for movement between a retracted position wherein the roller is spaced from the capstan and an engaged position wherein the roller is in pressure engagement with the capstan; means for moving the bracket from its retracted position to its engaged position and for urging the roller against the capstan comprising a trigger member movable between an engaged position wherein said capstan is rotatably driven and a disengaged position wherein said capstan is not driven, and resilient means having a portion located to be engaged by the trigger member in response to movement of the trigger member to its engaged position for concurrently exerting a force on the bracket in a direction to urge the bracket toward its engaged position.
Claim 5
Dependent Claim
56 words
Controlling means as set forth in claim 2 wherein said resilient means comprises a torsion spring having a coil portion and first and second leg portions, connected to said bracket, and the second leg portion being located to be engaged by the trigger member as the trigger member moves from its disengaged to its engaged position.
Claim 6
Dependent Claim
69 words
Controlling means as set forth in claim 3 wherein the bracket comprises retaining means for holding the second leg portion of the spring in a tensioned condition, and the trigger member is effective when moved to its engaged position to release the second leg portion of the spring from tHe retaining means, thereby exerting a resilient force on the bracket tending to move the bracket to its engaged position.
Claim 7
Dependent Claim
31 words
Controlling means as set forth in claim 4 wherein the trigger member is spaced from the second leg portion of the spring when the trigger member is in its disengaged position.
Claim 8
Dependent Claim
296 words
In a sound motion picture camera adapted to receive a film strip, means defining a film path along which the film strip is movable past an exposure aperture for the recording of images upon the film strip and past sound recording apparatus of the camera for recording of sound onto the film strip, the camera having a first drive means operable for moving the film strip along the film path past the exposure aperture, a second drive means operable for moving the film strip along the film path past the sound recording apparatus, and a trigger mechanism movable between (1) a first position for energizing said first and second drive means and (2) a second position for de-energizing said first and second drive means, said second drive means comprising: a. a capstan; b. means actuated by the trigger mechanism for driving said capstan at substantially a uniform speed; c. a pressure roller; d. means supporting said pressure roller for movement between (1) a first position wherein said roller is spaced from said capstan to relieve pressure on the film strip between the capstan and pressure roller and (2) a second position wherein said roller contacts said capstan for driving a received film strip therebetween; and e. control means for moving said supporting means from said first position to said second position and for maintaining said supporting means in said second position in response to actuation of said trigger mechanism to operate the first and second drive means, said control means comprising a spring having first and second leg members engageable with said means supporting said pressure roller, said second leg of said spring being positioned to be engaged by said trigger mechanism when said trigger mechanism is moved from its first position to its second position.
Claim 9
Dependent Claim
296 words
In a sound motion picture camera adapted to receive a film strip, means defining a film path along which the film strip is movable past an exposure aperture for the recording of images upon the film strip and past sound recording apparatus of the camera for recording of sound onto the film strip, the camera having a first drive means operable for moving the film strip along the film path past the exposure aperture, a second drive means operable for moving the film strip along the film path past the sound recording apparatus, and a trigger mechanism movable between (1) a first position for energizing said first and second drive means and (2) a second position for de-energizing said first and second drive means, said second drive means comprising: a. a capstan; b. means actuated by the trigger mechanism for driving said capstan at substantially a uniform speed; c. a pressure roller; d. means supporting said pressure roller for movement between (1) a first position wherein said roller is spaced from said capstan to relieve pressure on the film strip between the capstan and pressure roller and (2) a second position wherein said roller contacts said capstan for driving a received film strip therebetween; and e. control means for moving said supporting means from said first position to said second position and for maintaining said supporting means in said second position in response to actuation of said trigger mechanism to operate the first and second drive means, said control means comprising a spring having first and second leg members engageable with said means supporting said pressure roller, said second leg of said spring being positioned to be engaged by said trigger mechanism when said trigger mechanism is moved from its first position to its second position.
Claim 10
Dependent Claim
125 words
In a motion picture camera having a capstan adapted to drive a received film strip responsive to actuation of a trigger mechanism, the improvement comprising: a. a roller; b. a bracket supporting said roller for movement between (1) a first position wherein said roller is spaced from the capstan; and (2) a second position wherein said roller is adjacent to said capstan; and c. a spring engageable by the trigger mechanism when the trigger mechanism actuates the capstan, the trigger mechanism being effective to apply a force through said spring to urge said roller from its first position toward its second position and for resiliently maintaining said roller in its second position as a function of force applied through said spring by the trigger mechanism.
Claim 11
Dependent Claim
125 words
In a motion picture camera having a capstan adapted to drive a received film strip responsive to actuation of a trigger mechanism, the improvement comprising: a. a roller; b. a bracket supporting said roller for movement between (1) a first position wherein said roller is spaced from the capstan; and (2) a second position wherein said roller is adjacent to said capstan; and c. a spring engageable by the trigger mechanism when the trigger mechanism actuates the capstan, the trigger mechanism being effective to apply a force through said spring to urge said roller from its first position toward its second position and for resiliently maintaining said roller in its second position as a function of force applied through said spring by the trigger mechanism.
Claim 12
Dependent Claim
55 words
The improvement as set forth in claim 7 wherein said bracket normally restrains said spring in a compressed condition such that a predetermined force is stored in said spring and wherein said trigger mechanism transmits a force through said spring to said roller which is at least equal to the force stored in said spring.
Claim 13
Dependent Claim
172 words
An improvement for a motion picture camera having a capstan and a pressure member adapted to resiliently move a received film strip into a cooperating position with said capstan for driving said film strip when said capstan is energized, said improvement comprising: a. a bracket member supporting said pressure member for movement between (1) a first position wherein said pressure roller is spaced from said capstan, and (2) a second position wherein said pressure member moves said film strip into the cooperating position with said capstan; b. a spring supported by said bracket in a compressed condition such that a force is stored therein; and c. actuation means for energizing said capstan, said actuation means being engageable wiTh said spring and being effective to transmit to said bracket through said spring a force equal to or greater than the force stored in said spring for urging said pressure member toward its second position and for maintaining said pressure member in its second position as long as said actuation means energizes said capstan.
Claim 14
Dependent Claim
172 words
An improvement for a motion picture camera having a capstan and a pressure member adapted to resiliently move a received film strip into a cooperating position with said capstan for driving said film strip when said capstan is energized, said improvement comprising: a. a bracket member supporting said pressure member for movement between (1) a first position wherein said pressure roller is spaced from said capstan, and (2) a second position wherein said pressure member moves said film strip into the cooperating position with said capstan; b. a spring supported by said bracket in a compressed condition such that a force is stored therein; and c. actuation means for energizing said capstan, said actuation means being engageable wiTh said spring and being effective to transmit to said bracket through said spring a force equal to or greater than the force stored in said spring for urging said pressure member toward its second position and for maintaining said pressure member in its second position as long as said actuation means energizes said capstan.
Claim 15
Dependent Claim
168 words
A mechanism for controlling the engagement and disengagement of a movable pressure roller with a capstan, the mechanism comprising: a. a bracket rotatably supporting the roller for movement between a retracted position wherein the roller is spaced from the capstan and an engaged position wherein the roller is in pressure engagement with the capstan; b. means for moving said bracket from its retracted position to its engaged position and for maintaining the roller in pressure engagement with said capstan, said means comprising: i. a trigger member movable from a first position wherein said capstan is actuated and a second position wherein said capstan is non-actuated; and ii. resilient means engageable by said trigger member as said trigger member is moved from its second position it its first position, said trigger member cooperating with said resilient means to move the roller from its retracted position toward its engaged position and to resiliently maintain said bracket in its engaged position when said trigger member is maintained in its first position.
Claim 16
Dependent Claim
168 words
A mechanism for controlling the engagement and disengagement of a movable pressure roller with a capstan, the mechanism comprising: a. a bracket rotatably supporting the roller for movement between a retracted position wherein the roller is spaced from the capstan and an engaged position wherein the roller is in pressure engagement with the capstan; b. means for moving said bracket from its retracted position to its engaged position and for maintaining the roller in pressure engagement with said capstan, said means comprising: i. a trigger member movable from a first position wherein said capstan is actuated and a second position wherein said capstan is non-actuated; and ii. resilient means engageable by said trigger member as said trigger member is moved from its second position it its first position, said trigger member cooperating with said resilient means to move the roller from its retracted position toward its engaged position and to resiliently maintain said bracket in its engaged position when said trigger member is maintained in its first position.
Claim 17
Dependent Claim
143 words
For a motion picture camera having trigger means actuable for energizing drive means of the camera, the improvement comprising: a. a capstan supported by said camera, said capstan adapted to be rotatably driven by the drive means when the drive means is actuated; b. a pressure roller; c. a bracket rotatably supporting said pressure roller, said bracket being movable between (1) an engaged position wherein said pressure roller is positioned adjacent to said capstan and (2) a retracted position wherein said pressure roller is spaced apart from said capstan; and d. a spring interposed between the trigger means and said bracket, said spring being adapted to transmit a force from the trigger means to said bracket as the trigger means is actuated to move said bracket from said retracted position toward said engaged position and to maintain said bracket in said engaged position.
Claim 18
Dependent Claim
143 words
For a motion picture camera having trigger means actuable for energizing drive means of the camera, the improvement comprising: a. a capstan supported by said camera, said capstan adapted to be rotatably driven by the drive means when the drive means is actuated; b. a pressure roller; c. a bracket rotatably supporting said pressure roller, said bracket being movable between (1) an engaged position wherein said pressure roller is positioned adjacent to said capstan and (2) a retracted position wherein said pressure roller is spaced apart from said capstan; and d. a spring interposed between the trigger means and said bracket, said spring being adapted to transmit a force from the trigger means to said bracket as the trigger means is actuated to move said bracket from said retracted position toward said engaged position and to maintain said bracket in said engaged position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |