Patent US3899791A successfully refreshed from Google Patents.
US3899791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic positioning and aligning grid
Assignee: MAXIMILIAN KERR ASSOCIATES Inc
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Filing: 1973-02-09
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Granted: 1975-08-12
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Expires: 1993-02-09
Abstract
Abstract An improved photographic camera of the type having a viewfinder wherein the improvement comprises a means for precisely aligning and placing the subject to be photographed within the field of exposure of the camera.
Inventors
- 👤 Maximilian Kerr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:28
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B19/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
139 words
In a single lens reflex camera having a focal plane, a pivotable mirror for selectively and and alternately directing light to the camera film and to the said viewfinder focal plane, the improvement comprising means mounted on said viewfinder focal plane, said means having a plurality of markings thereon for dividing said viewfinder focal plane into one or more viewable areas, said viewfinder focal plane being mounted intermediate of the said eyepiece and a camera lens, said means and the film plane being substantially equidistant from said pivotable mirror, said means being precisely sized to a selected exposable area of the film in said camera, said plurality of markings precisely correlating the location of a subject in said viewfinder to the selected exposable area of the film whereby the precise location of the image on the film is controlled.
Claim 2
Dependent Claim
139 words
In a single lens reflex camera having a focal plane, a pivotable mirror for selectively and and alternately directing light to the camera film and to the said viewfinder focal plane, the improvement comprising means mounted on said viewfinder focal plane, said means having a plurality of markings thereon for dividing said viewfinder focal plane into one or more viewable areas, said viewfinder focal plane being mounted intermediate of the said eyepiece and a camera lens, said means and the film plane being substantially equidistant from said pivotable mirror, said means being precisely sized to a selected exposable area of the film in said camera, said plurality of markings precisely correlating the location of a subject in said viewfinder to the selected exposable area of the film whereby the precise location of the image on the film is controlled.
Claim 3
Dependent Claim
29 words
The camera specified in claim 1 wherein the exposable area delineated by said markings corresponds to the viewable film area after said film has been mounted in a slide.
Claim 4
Dependent Claim
21 words
The camera specified in claim 1 wherein the markings comprise a lined grid pattern for forming a plurality of exposable areas.
Claim 5
Dependent Claim
15 words
The camera specified in claim 3 wherein the lines in said grid pattern are numbered.
Claim 6
Dependent Claim
15 words
The camera specified in claim 1 wherein said markings comprise a television live area guide.
Claim 7
Dependent Claim
16 words
The camera specified in claim 1 wherein said markings comprise a film strip live area guide.
Claim 8
Dependent Claim
15 words
The camera specified in claim 1 wherein said markings comprise a television word message guide.
Claim 9
Dependent Claim
13 words
The camera specified in claim 1 wherein said markings comprise a mask guide.
Claim 10
Dependent Claim
12 words
The camera specified in claim 8 wherein said mask guide is circular.
Claim 11
Dependent Claim
19 words
The camera specified in claim 1 wherein said markings comprise a plurality of centering guides and a center dot.
Claim 12
Dependent Claim
43 words
The camera specified in claim 1 wherein said markings comprise a lined grid pattern for forming a plurality of exposable areas, the peripheral lines of said grid pattern delineating the viewable area of the film after it has been mounted in a slide.
Claim 13
Dependent Claim
33 words
The camera specified in claim 11 wherein said markings further comprise a live area television guide, a film strip live area guide, a television word message guide and at least one mask guide.
Claim 14
Dependent Claim
20 words
The camera specified in claim 1 wherein said means comprises a transparent sheet, said sheet having said markings placed thereon.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |