US3796485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Twin lens camera system having sequential or simultaneous lens operation
Assignee: Polaroid Corp
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Filing: 1972-09-15
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Granted: 1974-03-12
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Expires: 1992-09-15
Abstract
Abstract A twin lens camera system for producing multiple photographs from a single film sheet. The system includes a sliding back arrangement for movement of the film sheet so as to present different areas thereof to the twin lenses, and a logic circuit and indicator elements for denoting a suitable operational program of the system. A selector switch provides simultaneous or sequential operation of the twin lens system, and the logic circuit is responsive to either operational mode so as to indicate movement of the film sheet following operation of both lens systems.
Inventors
- 👤 M Seiden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:30
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B19/023; G03B19/04; G03B19/07
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
324 words
A camera system comprising: a pair of optical systems for respectiVely transmitting image carrying rays along a pair of exposure paths so as to form a pair of images of a given size at a focal plane; means for mounting a sheet of photographic material in said focal plane, such photographic sheet being at least four times said given size; selectively operable shutter means for unblocking and then blocking each of such exposure paths; means for actuating said shutter means to substantially simultaneously or sequentially unblock and block each of such exposure paths when either a first or second area of such photographic sheet is located in operative relation to said optical systems; means for achieving relative movement between said optical systems and said mounting means to sequentially present such first and second areas of such sheet of photographic material to said optical systems whereby such a first area may be first exposed to record a pair of images thereon and, after relative movement has been effected between said optical systems and said mounting means, such second area may be exposed to record a second pair of images thereon, the normal operation of said camera system being devised to commence with said mounting means in a first given position with respect to said optical systems and involving a predetermined sequence of steps performed by an operator to produce a pair of images on each such first and second areas of such photographic sheet, said sequence of steps including one step of operating said shutter actuating means so as to record a first pair of images and a subsequent step of effecting relative movement between said optical systems and said mounting means following the operation of said shutter means; and means responsive to the performance by the operator of said one step for indicating to the operator that said subsequent step is to be taken by him in conforming with said predetermined sequence of steps.
Claim 2
Dependent Claim
324 words
A camera system comprising: a pair of optical systems for respectiVely transmitting image carrying rays along a pair of exposure paths so as to form a pair of images of a given size at a focal plane; means for mounting a sheet of photographic material in said focal plane, such photographic sheet being at least four times said given size; selectively operable shutter means for unblocking and then blocking each of such exposure paths; means for actuating said shutter means to substantially simultaneously or sequentially unblock and block each of such exposure paths when either a first or second area of such photographic sheet is located in operative relation to said optical systems; means for achieving relative movement between said optical systems and said mounting means to sequentially present such first and second areas of such sheet of photographic material to said optical systems whereby such a first area may be first exposed to record a pair of images thereon and, after relative movement has been effected between said optical systems and said mounting means, such second area may be exposed to record a second pair of images thereon, the normal operation of said camera system being devised to commence with said mounting means in a first given position with respect to said optical systems and involving a predetermined sequence of steps performed by an operator to produce a pair of images on each such first and second areas of such photographic sheet, said sequence of steps including one step of operating said shutter actuating means so as to record a first pair of images and a subsequent step of effecting relative movement between said optical systems and said mounting means following the operation of said shutter means; and means responsive to the performance by the operator of said one step for indicating to the operator that said subsequent step is to be taken by him in conforming with said predetermined sequence of steps.
Claim 3
Dependent Claim
39 words
The camera system of claim 1 wherein said shutter means includes a pair of shutters, and said actuating means includes means for actuating said shutters, and wherein said means for indicating is responsive to actuation of both said shutters.
Claim 4
Dependent Claim
42 words
The camera system of claim 1 wherein said actuating means includes means for actuating one of said shutters simultaneously with, or subsequent to, the other of said shutters and wherein said indicating means is responsive solely to actuation of said one shutter.
Claim 5
Dependent Claim
173 words
The camera system of claim 1 wherein said camera system is of the Self-developing type including means for spreading a processing fluid across such sheet of photographic material responsive to such sheet of photographic material being withdrawn from said camera system, said sequence of steps includes the relative movement between said optical systems and said mounting means and operation of said actuating means to first record a pair of images when said mounting means is in said first position, then record a pair of images when said mounting means is in a second position with respect to said optical systems and withdrawal of such sheet of photographic material from said camera system subsequent to the relocation of said mounting means in said first position, and said indicating means additionally includes means responsive to operation of both said shutter means when said mounting means is in said second location, and to relative movement to relocate said mounting means in said first position for indicating to an operator that such sheet is to be withdrawn.
Claim 6
Dependent Claim
274 words
A camera system comprising: a pair of optical systems for respectively transmitting image carrying rays along a pair of exposure paths so as to form a pair of images of a given size at a focal plane; means for mounting a sheet of photographic material in said focal plane, such photographic sheet being at least four times said given size; selectively operable shutter means for unblocking and then blocking each of said exposure paths, said shutter means including a pair of shutters positioned in operative relationship respectively with each of said optical systems; manually operative means for achieving relative movement between said optical systems and said mounting means tO Sequentially locate first and second areas of such sheet of photographic material in operative relation to said optical systems whereby such first area may be first exposed to record a pair of images thereon and, after relative movement has been effected between said optical systems and said mounting means, such second area may be exposed to record a pair of images thereon; selectively operable means for actuating said shutter means to substantially simultaneously or sequentially unblock and then block each of such exposure paths when one of such first and second areas of such sheet is located in operative relation to said optical systems so as to record a pair of images on such one area; and means responsive to the actuation of said pair of shutters to block and unblock both said exposure paths when such one area is located in such one operative position for indicating to an operator that he should effect relative movement between said optical system and said mounting means.
Claim 7
Dependent Claim
274 words
A camera system comprising: a pair of optical systems for respectively transmitting image carrying rays along a pair of exposure paths so as to form a pair of images of a given size at a focal plane; means for mounting a sheet of photographic material in said focal plane, such photographic sheet being at least four times said given size; selectively operable shutter means for unblocking and then blocking each of said exposure paths, said shutter means including a pair of shutters positioned in operative relationship respectively with each of said optical systems; manually operative means for achieving relative movement between said optical systems and said mounting means tO Sequentially locate first and second areas of such sheet of photographic material in operative relation to said optical systems whereby such first area may be first exposed to record a pair of images thereon and, after relative movement has been effected between said optical systems and said mounting means, such second area may be exposed to record a pair of images thereon; selectively operable means for actuating said shutter means to substantially simultaneously or sequentially unblock and then block each of such exposure paths when one of such first and second areas of such sheet is located in operative relation to said optical systems so as to record a pair of images on such one area; and means responsive to the actuation of said pair of shutters to block and unblock both said exposure paths when such one area is located in such one operative position for indicating to an operator that he should effect relative movement between said optical system and said mounting means.
Claim 8
Dependent Claim
41 words
The camera system of claim 5 wherein said indicating means includes means for actuating one of said shutters simultaneously with, or subsequent to, the other of said shutters, and said indicating means is responsive solely to actuation of said one shutter.
Claim 9
Dependent Claim
56 words
The system of claim 6 for use with an electrical power source, said indicating means is a normally inoperative electrical indicator, and said actuating means includes means for coupling said indicator means to such source responsive to actuation of only said one shutter whereby said indicator is rendered operable only upon actuation of both said shutters.
Claim 10
Dependent Claim
13 words
The camera system of claim 5 wherein said indicating means comprises instructional indicia.
Claim 11
Dependent Claim
14 words
The camera system of claim 5 wherein said indicating means comprises a light source.
Claim 12
Dependent Claim
90 words
The system of claim 5 wherein said actuating means includes a selectively operable actuator member configured for actuating said shutters responsive to the operation of said actuator member by the camera operator and manually operable shutter mode selection means for coupling either both of said shutters to said actuator member so as to provide a first mode of actuation of both said shutters responsive to a single operation of said actuator member or a second mode of sequential operation of said shutteRs responsive to repeated operation of said actuator member.
Claim 13
Dependent Claim
142 words
The system of claim 10 for use with an electrical power source and wherein: said indicating means is an electrically operable indicator; said shutters are electrically operable; said shutter selection means includes a first network configured for simultaneously conducting firing signals to both said shutters and said indicator, a second network configured for sequentially conducting firing signals to each of said shutters in a predetermined order wherein a firing signal will be conducted to said indicator and to one of such shutters subsequent to conduction of the preceding firing signal to the other of said shutters, and a selector switch for coupling either said first or second network to said actuator member; and said actuator member includes switch means for coupling such power source to said selector switch so as to produce such firing signals responsive to operation of said actuator member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |