US3603676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for producing fade-in and fadeout effects on motion picture film
Assignee: Robert Bosch Photokino GmbH
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Filing: 1970-01-14
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Granted: 1971-09-07
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Expires: 1990-01-14
Abstract
Abstract A motion picture camera with a between-the-lens diaphragm wherein the means for producing fade-in and fadeout effects comprises a diaphanous light-dispersing optical element which is movable across the path of incoming scene light between the diaphragm and one lens of the picture-taking objective so that the optical element thereby varies the sharpness of the real image which is produced by the objective. The optical element is movable by a rotary cam against the opposition of a spring and its initial position with reference to the aperture of the diaphragm is adjustable by a selector which can pivot a lever positioned to displace the optical element in response to rotation of the cam or in response to displacement of the selector. A carrier which supports the optical element and is movable by the lever is provided with a mask which can be moved across the path of incoming scene light instead of the optical element to thereby effect the brightness of the real image.
Inventors
- 👤 Richard Loewe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:29
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/18; G03B19/26
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
69 words
In a motion picture camera, a combination comprising a picture-taking objective having a plurality of lenses including a first and second lens; a diaphragm disposed between said first and second lenses; a diaphanous light-dispersing optical element adjacent to said diaphragm; and displacing means for moving said optical element across the path of incoming scene light whereby said optical element varies the sharpness of the image produced by said objective.
Claim 2
Dependent Claim
69 words
In a motion picture camera, a combination comprising a picture-taking objective having a plurality of lenses including a first and second lens; a diaphragm disposed between said first and second lenses; a diaphanous light-dispersing optical element adjacent to said diaphragm; and displacing means for moving said optical element across the path of incoming scene light whereby said optical element varies the sharpness of the image produced by said objective.
Claim 3
Dependent Claim
34 words
A combination as defined in claim 1, wherein said displacing means comprises a carrier supporting said optical element actuating means for moving said carrier substantially at right angles to the axis of said objective.
Claim 4
Dependent Claim
45 words
A combination as defined in claim 1, wherein said carrier is reciprocable and said actuating means comprises spring means for biasing said carrier in a first direction and cam means for moving said carrier in a second direction against the opposition of said spring means.
Claim 5
Dependent Claim
24 words
A combination as defined in claim 3, wherein said displacing means further comprises presetting means for moving said carrier independently of said cam means.
Claim 6
Dependent Claim
56 words
A combination as defined in claim 4, wherein said diaphragm is adjustable to define a range of apertures and wherein said presetting means is arrangeD to move said carrier so as to place said optical element adjacent to the path of scene light passing through the selected aperture in a neutral position of said cam means.
Claim 7
Dependent Claim
44 words
A combination as defined in claim 5, wherein said presetting means comprises a motion-transmitting member and said spring means is arranged to bias said carrier against said member, said cam means being arranged to move said member against the opposition of said spring means.
Claim 8
Dependent Claim
48 words
A combination as defined in claim 6, wherein said motion transmitting member is a lever and said presetting means further comprises selector means arranged to pivot said lever with reference to said cam means to thereby move said carrier under or against the bias of said spring means.
Claim 9
Dependent Claim
37 words
A combination as defined in claim 1, further comprising an opaque element, said displacing means comprising means for moving said opaque element across the path of incoming scene light instead of said optical element or vice versa.
Claim 10
Dependent Claim
27 words
A combination as defined in claim 8, wherein said displacing means comprises common carrier means for said elements and actuating means operative to displace said carrier means.
Claim 11
Dependent Claim
48 words
A combination as defined in claim 9, further comprising shifter means for moving said carrier means between a first and a second position in which said carrier means respectively moves said optical element and said opaque element across said path in response to operation of said actuating means.
Claim 12
Dependent Claim
27 words
A combination as defined in claim 1, wherein said optical element is movable across said path between one of said first and second lenses and said diaphragm.
References Cited (Backward Citations)
US3246944A
Cited
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 |