US3628437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic camera
Assignee: Compur Werk GmbH and Co
•
Filing: 1969-04-15
•
Granted: 1971-12-21
•
Expires: 1989-04-15
Abstract
Abstract A photographic camera in which the exposure time or shutter speed is controlled by an electronic time control arrangement set into operation by an electronic switch operated by an electrical impulse. The initiating impulse is preferably derived from a gate, which may take various forms. In one disclosed form, the impulse is produced by a magnetic gate; in another, by a photoelectric gate; and in a third form, by a capacitive gate.
Inventors
- 👤 Paul Fahlenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:24
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/083
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
113 words
A photographic camera comprising an electronic timing device adapted to be set into operation at a predetermined time and provided for controlling the timing of a photogrAphic exposure, an electronic switch for determining said predetermined time, an electrical impulse for setting said electronic switch into operation, a gate for producing said electrical impulse, and a member running down from one end position to another end position with predetermined speed after releasing the camera to make an exposure and before setting said electronic timing device into operation, said gate being influenced by said member in the course of its running down movement for producing said electrical impulse and setting said electronic switch into operation.
Claim 2
Dependent Claim
113 words
A photographic camera comprising an electronic timing device adapted to be set into operation at a predetermined time and provided for controlling the timing of a photogrAphic exposure, an electronic switch for determining said predetermined time, an electrical impulse for setting said electronic switch into operation, a gate for producing said electrical impulse, and a member running down from one end position to another end position with predetermined speed after releasing the camera to make an exposure and before setting said electronic timing device into operation, said gate being influenced by said member in the course of its running down movement for producing said electrical impulse and setting said electronic switch into operation.
Claim 3
Dependent Claim
72 words
A camera as defined in claim 1, further including at least one shutter blade, and a blade-operating member movable from a tensioned position to a rundown position to move said blade to make a photographic exposure, characterized by the fact that said member influencing said gate is coupled with said blade-operating member for the purpose of producing said electrical impulse at the beginning of the rundown movement of said blade operating member.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |