Patent US5399158A successfully refreshed from Google Patents.
US3796483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film footage indicator device
Assignee: Canon Inc
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Filing: 1973-02-22
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Granted: 1974-03-12
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Expires: 1993-02-22
Abstract
Abstract A film footage indicator device for cinecameras capable of indicating consumption of as little as 10 or 20 frames includes first power transmission means deceleratedly driven from a drive source, second power transmission means engageable with said first transmission means and movable axially thereof, a guide member formed with a helical groove and coupled integrally to said second transmission means, resilient means normally biasing the guide member and the second transmission means toward their start position for axial movement, and an engaging member engageable with the guide member upon insertion of a film cassette into the camera and disengageable therefrom upon removal of the cassette from the camera, thereby indicating an amount of film consumption in accordance with the axial and rotary movements of the second transmission means.
Inventors
- 👤 K Sakaguchi
- 👤 N Hirata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:54
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/43
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
169 words
A film footage indicator device for a photographic camera having drive means for film, the improvement comprising: a power source attached to the camera; first power transmission means driven from said drive means; second power transmission means drivingly engaged by said first power transmission means to receive rotary power therefrom, said second power transmission means having an indicator portion for indicating an amount of film consumption in accordance with the axial displacement thereof; a guide member engageable by said second power transmission means for continuous rotation and axial movement therewith, and having a helical groove formed thereon; resilient means provided with a resiliency for returning said guide member to its predetermined axial position; engaging means engageable with said guide member upon insertion of a film cassette into a chamber therefor within the camera and disengageable therefrom upon removal of the cassette from said chamber; and indicator means having scale means cooperable with at least a portion of said second power transmission means to indicate an amount of film consumption.
Claim 2
Dependent Claim
169 words
A film footage indicator device for a photographic camera having drive means for film, the improvement comprising: a power source attached to the camera; first power transmission means driven from said drive means; second power transmission means drivingly engaged by said first power transmission means to receive rotary power therefrom, said second power transmission means having an indicator portion for indicating an amount of film consumption in accordance with the axial displacement thereof; a guide member engageable by said second power transmission means for continuous rotation and axial movement therewith, and having a helical groove formed thereon; resilient means provided with a resiliency for returning said guide member to its predetermined axial position; engaging means engageable with said guide member upon insertion of a film cassette into a chamber therefor within the camera and disengageable therefrom upon removal of the cassette from said chamber; and indicator means having scale means cooperable with at least a portion of said second power transmission means to indicate an amount of film consumption.
Claim 3
Dependent Claim
33 words
A film footage indicator device according to claim 1, wherein said first power transmission means has connected thereto drive means capable of controlling a photographic optical system by means of a shaft coupling.
Claim 4
Dependent Claim
36 words
A film footage indicator device according to claim 1, wherein said indicator means is indicated by an index member opposedly placed to said cooperable portion of said second power transmission means provided in said camera housing.
Claim 5
Dependent Claim
27 words
A film footage indicator device according to claim 1, wherein said first power transmission means comprises a shaft coupling, a skew gear and an elongated spur gear.
Claim 6
Dependent Claim
19 words
A film footage indicator device according to claim 1, wherein said second power transmission means includes a spur gear.
Claim 7
Dependent Claim
165 words
A film footage indicator device for a photographic camera having drive means for film, the improvement comprising: a power source attached to the camera; first power transmission means deceleratedly driven from said drive means; second power transmission means receiving the rotary power from said first power transmission means, said second power transmission means having an indicator portion for indicating an amount of film consumption in accordance with the axial and rotary movement thereof; a guide member engageable by said second power transmission means and having a helical thread-like groove; resilient means normally biasing said guide member and said second power transmission means toward their start position for axial movement; engaging means engageable with said guide member upon insertion of a film cassette into a chamber therefor and disengageable from said guide member upon removal of said cassette from said chamber; and scale means provided along the path of said indicator portion of said second power transmission means so as to cooperate with said indicator portion.
Claim 8
Dependent Claim
165 words
A film footage indicator device for a photographic camera having drive means for film, the improvement comprising: a power source attached to the camera; first power transmission means deceleratedly driven from said drive means; second power transmission means receiving the rotary power from said first power transmission means, said second power transmission means having an indicator portion for indicating an amount of film consumption in accordance with the axial and rotary movement thereof; a guide member engageable by said second power transmission means and having a helical thread-like groove; resilient means normally biasing said guide member and said second power transmission means toward their start position for axial movement; engaging means engageable with said guide member upon insertion of a film cassette into a chamber therefor and disengageable from said guide member upon removal of said cassette from said chamber; and scale means provided along the path of said indicator portion of said second power transmission means so as to cooperate with said indicator portion.
Claim 9
Dependent Claim
33 words
A film footage indicator device according to claim 6, wherein said first power transmission means has connected thereto drive means capable of controlling a photographic optical system by means of a shaft coupling.
Claim 10
Dependent Claim
22 words
A film footage indicator device according to claim 6, wherein said indicator portion comprises a scale disc having divisions formed circumferentially thereof.
Claim 11
Dependent Claim
27 words
A film footage indicator device according to claim 6, wherein said first power transmission means comprises a shaft coupling, a skew gear and an elongated spur gear.
Claim 12
Dependent Claim
19 words
A film footage indicator device according to claim 6, wherein said second power transmission means includes a spur gear.
Claim 13
Dependent Claim
135 words
A film footage indicator device for a photographic camera having drive means for driving a film, comprising: drive means for advancing the film; first drive means drivingly connected to said drive means; second drive means connected to and deceleratedly driven from said first drive means, said second drive means having a rotary member and a coiled resilient member for biasing said rotary member to its predetermined start position, said resilient member being connected to said rotary member for rotation therewith; engaging means engageable with the coiled groove of said resilient member upon insertion of a film cassette into a chamber therefor and disengageable from said groove upon removal of said cassette from said chamber; and scale means cooperable with at least a portion of said rotary member and provided along the path of said portion.
Claim 14
Dependent Claim
135 words
A film footage indicator device for a photographic camera having drive means for driving a film, comprising: drive means for advancing the film; first drive means drivingly connected to said drive means; second drive means connected to and deceleratedly driven from said first drive means, said second drive means having a rotary member and a coiled resilient member for biasing said rotary member to its predetermined start position, said resilient member being connected to said rotary member for rotation therewith; engaging means engageable with the coiled groove of said resilient member upon insertion of a film cassette into a chamber therefor and disengageable from said groove upon removal of said cassette from said chamber; and scale means cooperable with at least a portion of said rotary member and provided along the path of said portion.
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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |