Patent US4583690A successfully refreshed from Google Patents.
Patent US3691918A successfully refreshed from Google Patents.
US3691918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device in a photographic camera for setting the film speed value and transferring it to the exposure meter
Assignee: Individual
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Filing: 1971-08-02
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Granted: 1972-09-19
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Expires: 1991-08-02
Abstract
Abstract A device for setting and transferring film speed value to an exposure meter in a camera, of the type employing a movable rod adapted to assume different axial positions corresponding to different film speed values, comprises a movable stop member located adjacent one end of the rod for defining the axial position of the rod. The position of the stop member is in turn controlled by a rotatable cam curve having a uniform pitch between its lowest and highest points, and a difference in height between said lowest and highest points sufficient to vary the position of the movable stop member through a total distance corresponding to the film speed range of the exposure meter.
Inventors
- 👤 Lave Tenne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:00
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
181 words
A device for setting film speed value and for transferring said value to an exposure meter in a camera, of the type wherein a movable rod is adapted to assume different axial positions corresponding respectively to different film speed values which are to be transferred to the exposure meter, comprising a movable stop member located adjacent said rod for defining the axial position of said rod, a rotatable cam curve located adjacent said stop member, means for selectively changing the rotational position of said cam curve, resilient means resiliently urging said movable stop member toward said cam curve whereby the rotational position of said cam curve determines the position of said adjustable stop member thereby to define the axial position of said rod, said cam curve having a uniform pitch between its lowest and highest points, the difference in height between the lowest and highest points of said cam curve being preselected to permit the position of said movable stop member to be varied through a total distance corresponding to the film speed range of the exposure meter in said camera.
Claim 2
Independent Claim
181 words
A device for setting film speed value and for transferring said value to an exposure meter in a camera, of the type wherein a movable rod is adapted to assume different axial positions corresponding respectively to different film speed values which are to be transferred to the exposure meter, comprising a movable stop member located adjacent said rod for defining the axial position of said rod, a rotatable cam curve located adjacent said stop member, means for selectively changing the rotational position of said cam curve, resilient means resiliently urging said movable stop member toward said cam curve whereby the rotational position of said cam curve determines the position of said adjustable stop member thereby to define the axial position of said rod, said cam curve having a uniform pitch between its lowest and highest points, the difference in height between the lowest and highest points of said cam curve being preselected to permit the position of said movable stop member to be varied through a total distance corresponding to the film speed range of the exposure meter in said camera.
Claim 3
Dependent Claim
26 words
The structure of claim 1 wherein said means for changing the rotational position of said cam curve is manually accessible from the exterior of said camera.
Claim 4
Dependent Claim
56 words
The structure of claim 1 wherein said cam curve includes a series of grooves spaced from one another along the edge of said curve between said highest and lowest points, said stop member including a pin adapted to engage any selected one of said grooves to inhibit unintentional changes in the setting position of said device.
Claim 5
Dependent Claim
22 words
The structure of claim 1 wherein said device is mounted on a film magazine adapted to be removably attached to a camera.
Claim 6
Dependent Claim
84 words
The structure of claim 1 wherein said stop member comprises a planar plate mounted for slidable movement in a direction parallel to the axial direction of said rod, said plate including a first portion positioned to engage one end of said rod for limiting the axial position of said rod and a second portion positioned to engage said cam curve for defining the slidable position of said plate, said resilient means comprising spring means urging said second portion into engagement with said cam curve.
Claim 7
Dependent Claim
22 words
The structure of claim 5 wherein both said first and second portions extend in directions transverse to the plane of said plate.
Claim 8
Dependent Claim
17 words
The structure of claim 1 including an index disc attached to said cam curve for rotation therewith.
Claim 9
Dependent Claim
30 words
The structure of claim 7 wherein said means for changing the rotational position of said cam curve comprises a manually accessible member extending through an aperture in said index disc.
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |