US3767298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion picture camera with means for making {37 time{38 {11 exposures
Assignee: Robert Bosch GmbH
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Filing: 1972-12-04
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Granted: 1973-10-23
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Expires: 1992-12-04
Abstract
Abstract A motion picture camera wherein the shutter is adjustable by an electric motor for the making of normal exposures at a relatively high frequency and for the making of long or ''''time'''' exposures at a selected lower frequency. The shutter is at a standstill during the making of each long exposure and is rotated only between successive long exposures to overlie the light-admitting opening during film transport. The adjustment for the making of long exposures takes place in automatic reponse to rotation of a selector for the desired number of long exposures. Upon completion of the last long exposure, the shutter is automatically reset for the making of normal exposures and the motor is arrested.
Inventors
- 👤 H Reinsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:28
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/18; G03B21/00; G03B21/14; G03B21/32; G03B21/50; G03B7/00; G03B7/003
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
157 words
In a motion picture camera, a combination comprising means defining a light-admitting opening; film transporting means actuatable to place successive frames of motion picture film into register with said opening; adjustable mobile shutter means adapted to assume a first condition for the making of a first type of exposures and a second condition for the making of a second type of exposures during the making of which said shutter means is at a standstill between successive actuations of said film transporting means and is out of register with said opening; and control means including selector means operable to change the condition of said shutter means from said first to said second condition and to select a desired number of exposures of said second type, and resetting means operable to change the condition of said shutter means from said second to said first condition in response to completion of said desired number of exposures of said second type.
Claim 2
Dependent Claim
157 words
In a motion picture camera, a combination comprising means defining a light-admitting opening; film transporting means actuatable to place successive frames of motion picture film into register with said opening; adjustable mobile shutter means adapted to assume a first condition for the making of a first type of exposures and a second condition for the making of a second type of exposures during the making of which said shutter means is at a standstill between successive actuations of said film transporting means and is out of register with said opening; and control means including selector means operable to change the condition of said shutter means from said first to said second condition and to select a desired number of exposures of said second type, and resetting means operable to change the condition of said shutter means from said second to said first condition in response to completion of said desired number of exposures of said second type.
Claim 3
Dependent Claim
39 words
A combination as defined in claim 1, further comprising drive means for said shutter means, said resetting means including means for arresting said drive means in response to completion of said desired number of exposures of said second type.
Claim 4
Dependent Claim
25 words
A combination as defined in claim 2, wherein said shutter means overlies said opening in said first condition thereof when said drive means is arrested.
Claim 5
Dependent Claim
74 words
A combination as defined in claim 3, wherein said drive means comprises electric motor means and said control means further comprises normally open electric switch means in circuit with said motor means, said selector means including means for effecting a temporary closing of said normally open switch means in response to operation of said selector means whereby said motor means changes the condition of said shutter means from said first to said second condition.
Claim 6
Dependent Claim
56 words
A combination as defined in claim 4, wherein said resetting means comprises means for effecting a temporary closing of said nomally open switch means in response to completion of said desired number of exposures of said second type whereby said motor means changes the condition of said shutter means from said second to said first condition.
Claim 7
Dependent Claim
54 words
A combination as defined in claim 5, wherein said control means further comprises electromagnet means energizable to close said normally open switch means, a source of electrical energy, and second switch means for connecting said electromagnet means in circuit with said source in response to operation of said selector means and said resetting means.
Claim 8
Dependent Claim
51 words
A combination as defined in claim 6, wherein said second switch means includes a plurality of series-connected interrupter switches and said control means further comprises programming means receiving motion from said motor means and arranged to open selected interrupter switches while said motor means changes the condition of said shutter means.
Claim 9
Dependent Claim
71 words
A combination as defined in claim 1, wherein said control means further comprises generator means for producing signals to effect the actuation of said film transporting means, said selector means including means for starting said generator means in response to selection of said desired number of exposures of said second type and for arresting said generator means in response to completion of said desired number of exposures of said second type.
Claim 10
Dependent Claim
51 words
A combination as defined in claim 8, wherein said generator means includes an electronic signal generator and said control means further comprises a source of electrical energy and switch means controlled by said selector means for connecting said signal generator with said source in the second condition of said shutter means.
Claim 11
Dependent Claim
64 words
A combination as defined in claim 9, wherein said switch means includes a multi-way switch having first and second contacts and a third contact contRolled by said selector means to move from engagement with said first contact into engagement with said second contact in response to operation of said selector means whereby said second and third contacts connect said signal generator with said source.
Claim 12
Dependent Claim
77 words
A combination as defined in claim 1, wherein said selector means comprises a rotary member which is movable by hand from a starting position to a plurality of additional positions each corresponding to a different number of exposures of said second type, and means for moving said rotary member stepwise from a selected additional position toward said starting position in response to successive actuations of said film transporting means in said second condition of said shutter means.
Claim 13
Dependent Claim
42 words
A combination as defined in claim 11, wherein said means for moving said rotary member stepwise comprises a second rotary member receiving motion from said film transporting means and means for biasing one of said rotary members against the other rotary member.
Claim 14
Dependent Claim
28 words
A combination as defined in claim 11, further comprising arresting means for preventing the movement of said rotary member from a selected additional position beyond said starting position.
Claim 15
Dependent Claim
34 words
A combination as defined in claim 1, wherein said shutter means includes a rotary shutter which completes a full revolution in response to completion of each of said first and second types of exposures.
Claim 16
Dependent Claim
31 words
A combination as defined in claim 1, wherein said film transporting means comprises an electric motor and transmission means for moving said shutter means in response to actuation of said motor.
References Cited (Backward Citations)
US2462302A
Cited
US3603678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |