US3601022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic camera
Assignee: Pentacon GmbH Foto und Feinwerktechnik
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Filing: 1968-12-05
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Granted: 1971-08-24
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Expires: 1988-12-05
Abstract
Abstract The photographic camera is provided with a flash apparatus which can be mounted on the camera housing or used at a remote position from the camera. The flash apparatus is provided with a photoelectric cell and a flash timing control device. The camera housing contains a photoelectric cell positioned in the optical path through the camera and normally used to control the shutter or diaphragm mechanism. An extension lead is provided for coupling the camera to the flash apparatus so that the photoelectric cell in the camera housing influences the control device of the flash apparatus whilst at the same time rendering the cell of the flash apparatus inoperative.
Inventors
- 👤 Kurt Langnau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:25
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/05; G03B2215/00; G03B2215/05; G03B2215/0514; G03B2215/056
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
142 words
In a photographic camera having a first photoelectric cell carried by the camera housing and associated with an exposure factor setting device within the housing, a flash apparatus which includes a flash time control device influenced by a second photoelectric cell an extension lead for connecting said flash apparatus with said camera housing, the provision of: a. a first changeover switch device in said camera housing which in one switched position connects said first photoelectric cell with said exposure factor setting device, and in a second position connects said first photoelectric cell with one end of said lead and b. a second switch device in said flash apparatus which in one switched position connects said second photoelectric cell with said flash time control device and in a second position connects said flash time control device with the other end of said lead.
Claim 2
Dependent Claim
142 words
In a photographic camera having a first photoelectric cell carried by the camera housing and associated with an exposure factor setting device within the housing, a flash apparatus which includes a flash time control device influenced by a second photoelectric cell an extension lead for connecting said flash apparatus with said camera housing, the provision of: a. a first changeover switch device in said camera housing which in one switched position connects said first photoelectric cell with said exposure factor setting device, and in a second position connects said first photoelectric cell with one end of said lead and b. a second switch device in said flash apparatus which in one switched position connects said second photoelectric cell with said flash time control device and in a second position connects said flash time control device with the other end of said lead.
Claim 3
Dependent Claim
65 words
A photographic camera according to claim 1, wherein plug contacts are provided at each end of said extension lead and the plug contacts when inserted in the camera and flash apparatus actuate the first and second changeover switch devices respectively, whereby the switches move to said second switch positions and connect said first photoelectric cell with said flash time control device through the extension lead.
Claim 4
Dependent Claim
91 words
A photographic camera according to claim 1, wherein an objective lens is provided in the camera and the said first photoelectric cell is positioned in the camera so as to be in the path of light rays that enters the camera through said objective lens, and a filter is provided in the flash apparatus, the said second photoelectric cell being equipped with said filter, whereby the degree of transmittance of illumination on to said second photoelectric cell corresponds to the degree of transmittance of illumination which influences the first photoelectric cell.
Claim 5
Dependent Claim
80 words
A photographic camera according to claim 1, wherein an objective lens is provided in the camera and the said first photoelectric cell is mounted in the path of light rays entering the objective lens, and a filter is provided in the flash apparatus, the said second photoelectric cell being equipped with said filter, whereby the degree of transmittance of illumination on to said second photoelectric cell corresponds to the degree of transmittance of illumination which influences the first photoelectric cell.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |