US3719128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shiftable light mask for camera lens
Assignee: Individual
•
Filing: 1971-04-19
•
Granted: 1973-03-06
•
Expires: 1991-04-19
Abstract
Abstract A structure basically resembling a lens cap and releasably frictionally engagable over the lens barrel of a particular design of camera. The end wall is, however, provided with a slightly less than one-quarter sector opening for registry with a one-quarter sector of the associated camera lens. The structure is designed for adjustable rotation relative to the associated lens barrel and the opening in the end wall thereof may therefore be successively registered with four one-quarter sectors of the associated lens so that the lens may be effectively masked in a manner enabling a single frame of film to have the four corner portions thereof successively exposed with the result that each film frame may be utilized to produce four different photographs.
Inventors
- 👤 R Simmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:35
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B19/023
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
205 words
In combination with a camera lens assembly of the type having a forwardly projecting lens barrel and operatively associated with a camera construction of the type enabling multiple exposures of a single frame of film within the camera, a light shielding cap including peripheral wall portions telescoped over the front of said lens barrel for support of said cap therefrom, said cap including a transverse opaque front wall registered with and overlying the front end of said lens barrel, said front wall having an opening formed therein in one corner sector thereof defined by the intersection of right angled diameters of the center axis of said lens barrel, said opening including edge portions thereof extending generally along said diameters, said cap including four circumferentially spaced and radially outwardly projecting tabs thereon, said tabs each including at least one straight edge portion thereof that parallels one of said generally straight edge portions of said opening, said cap including four circumferentially spaced and radially outwardly projecting tabs thereon, said tabs each including a rectangular opening therein with visually ascertainable means indicating corner portions of said rectangular openings corresponding to the sector positioning of said front wall opening, the sides of said rectangular openings generally paralleling said diameters.
Claim 2
Dependent Claim
205 words
In combination with a camera lens assembly of the type having a forwardly projecting lens barrel and operatively associated with a camera construction of the type enabling multiple exposures of a single frame of film within the camera, a light shielding cap including peripheral wall portions telescoped over the front of said lens barrel for support of said cap therefrom, said cap including a transverse opaque front wall registered with and overlying the front end of said lens barrel, said front wall having an opening formed therein in one corner sector thereof defined by the intersection of right angled diameters of the center axis of said lens barrel, said opening including edge portions thereof extending generally along said diameters, said cap including four circumferentially spaced and radially outwardly projecting tabs thereon, said tabs each including at least one straight edge portion thereof that parallels one of said generally straight edge portions of said opening, said cap including four circumferentially spaced and radially outwardly projecting tabs thereon, said tabs each including a rectangular opening therein with visually ascertainable means indicating corner portions of said rectangular openings corresponding to the sector positioning of said front wall opening, the sides of said rectangular openings generally paralleling said diameters.
Claim 3
Dependent Claim
205 words
In combination with a camera lens assembly of the type having a forwardly projecting lens barrel and operatively associated with a camera construction of the type enabling multiple exposures of a single frame of film within the camera, a light shielding cap including peripheral wall portions telescoped over the front of said lens barrel for support of said cap therefrom, said cap including a transverse opaque front wall registered with and overlying the front end of said lens barrel, said front wall having an opening formed therein in one corner sector thereof defined by the intersection of right angled diameters of the center axis of said lens barrel, said opening including edge portions thereof extending generally along said diameters, said cap including four circumferentially spaced and radially outwardly projecting tabs thereon, said tabs each including at least one straight edge portion thereof that parallels one of said generally straight edge portions of said opening, said cap including four circumferentially spaced and radially outwardly projecting tabs thereon, said tabs each including a rectangular opening therein with visually ascertainable means indicating corner portions of said rectangular openings corresponding to the sector positioning of said front wall opening, the sides of said rectangular openings generally paralleling said diameters.
Claim 4
Dependent Claim
205 words
In combination with a camera lens assembly of the type having a forwardly projecting lens barrel and operatively associated with a camera construction of the type enabling multiple exposures of a single frame of film within the camera, a light shielding cap including peripheral wall portions telescoped over the front of said lens barrel for support of said cap therefrom, said cap including a transverse opaque front wall registered with and overlying the front end of said lens barrel, said front wall having an opening formed therein in one corner sector thereof defined by the intersection of right angled diameters of the center axis of said lens barrel, said opening including edge portions thereof extending generally along said diameters, said cap including four circumferentially spaced and radially outwardly projecting tabs thereon, said tabs each including at least one straight edge portion thereof that parallels one of said generally straight edge portions of said opening, said cap including four circumferentially spaced and radially outwardly projecting tabs thereon, said tabs each including a rectangular opening therein with visually ascertainable means indicating corner portions of said rectangular openings corresponding to the sector positioning of said front wall opening, the sides of said rectangular openings generally paralleling said diameters.
Claim 5
Dependent Claim
21 words
The combination of claim 1 whereiN said visually ascertainable means comprise generally rectangular tab elements supported within said corresponding corner portions.
Claim 6
Dependent Claim
42 words
The combination of claim 2 wherein said camera includes a view finder window through which the operator of the camera may view the area aligned with the center axis of said lens barrel, one of said tabs being viewable through said window.
References Cited (Backward Citations)
US1533433A
Cited
US3122077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |