US3603672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for controlling the amount of light rays in optical instruments
Assignee: Individual
•
Filing: 1969-04-17
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Granted: 1971-09-07
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Expires: 1989-04-17
Abstract
Abstract The amount or intensity of light rays passing through a lens or transparent sheet, or reflected by a mirror is controlled by winding a film over the lens or mirror, the film having portions throughout its length having different degrees of opacity or different colors.
Inventors
- 👤 Paul Bastide
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:47
CPC Classifications
B; B60; B60R; B60R1/00; B60R1/02; B60R1/08; B60R1/083; B60R1/084; G; G02; G02B; G02B5/00; G02B5/20; G02B5/205
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
167 words
A device for controlling the amount of light rays in an optical instrument comprising in combination: a rectangular frame, a pair of film spools respectively mounted for rotation along opposite sides of said frame, a film stretched across said frame and the ends of which are respectively wound around said spools, said film having an area wherein its permeability to light progressively varies along its length and means for rotating said spools, whereby different portions of said area of said film can be brought into registration with said frame for the purpose specified, and further comprising shades provided along and partly surrounding said spools, and longitudinal grooves engaged by the longitudinal edges of said film provided on the side of said frame along which said spools are not mounted, and wherein cleaning means are supported by said shades partly surrounding said spools, the film being wound on the respective spools in reverse directions such that the cleaning means on each shade cleans one of the film surfaces.
Claim 2
Independent Claim
167 words
A device for controlling the amount of light rays in an optical instrument comprising in combination: a rectangular frame, a pair of film spools respectively mounted for rotation along opposite sides of said frame, a film stretched across said frame and the ends of which are respectively wound around said spools, said film having an area wherein its permeability to light progressively varies along its length and means for rotating said spools, whereby different portions of said area of said film can be brought into registration with said frame for the purpose specified, and further comprising shades provided along and partly surrounding said spools, and longitudinal grooves engaged by the longitudinal edges of said film provided on the side of said frame along which said spools are not mounted, and wherein cleaning means are supported by said shades partly surrounding said spools, the film being wound on the respective spools in reverse directions such that the cleaning means on each shade cleans one of the film surfaces.
Claim 3
Dependent Claim
24 words
A device as claimed in claim 1, wherein the permeability to light of said film varies from opacity to transparency along the said area.
Claim 4
Dependent Claim
18 words
A device as claimed in claim 1 wherein said means for rotating said spools comprise a remote-controlled motor.
Claim 5
Dependent Claim
11 words
A device according to claim 1, wherein the spools are detachable.
Claim 6
Dependent Claim
23 words
A device according to claim 1, wherein the film is perforated at its edges with holes meshing with teeth provided on said spools.
Claim 7
Dependent Claim
29 words
A device according to claim 1, further comprising means mounting said cleaning means normally out of contact with the film, including means resiliently mounting said shades on said frame.
Claim 8
Dependent Claim
35 words
A device according to claim 1, wherein one of the said spools is provided with a resilient return device while the other said spool is provided with means for immobilizing it in any chosen position.
Claim 9
Dependent Claim
13 words
A device according to claim 7, wherein the immobilizing mechanism is a brake.
Claim 10
Dependent Claim
23 words
A device according to claim 7 wherein said means for rotating said spools comprise a remote-controlled motor associated to said other said spool.
Claim 11
Dependent Claim
19 words
A device according to claim 1 wherein said frame is provided with means for mounting it onto a vehicle.
Claim 12
Dependent Claim
27 words
A device according to claim 10 wherein said mounting means are swiveling means allowing to bring said frame before the eyes of an occupant of said vehicle.
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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |