Patent US3883884A successfully refreshed from Google Patents.
US3883884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic camera having an accessories mounting shoe
Assignee: Pentacon GmbH Foto und Feinwerktechnik
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Filing: 1974-03-21
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Granted: 1975-05-13
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Expires: 1994-03-21
Abstract
Abstract The photographic camera has a centre contact device disposed in a flashgun mounting shoe and a cable socket contact device located on the camera. A first circuit comprising a synchronous shutter switch and the centre contact device and a second circuit comprising the synchronous shutter switch and the cable socket contact device are also provided. A further switch is arranged in the second circuit and an insulating slide located in the shoe is adapted to be operated by the flashgun and which co-operates both with the centre contact device and the further switch to open the latter when the flashgun is inserted and closed when the flashgun is not present.
Inventors
- 👤 Harald Fuchsel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:33
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/04; G03B15/0452; G03B9/00; G03B9/70
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
In a photographic camera having a flashgun mounting shoe with a centre contact device disposed therein, a cable socket contact device located on the camera, a first circuit comprising a synchronous shutter switch and said centre contact device, a second circuit comprising said synchronous shutter switch and said cable socket contact device, the provision of a. a further switch arranged in said second circuit, b. an insulating slide located in said shoe and adapted to be operated by the flashgun and which co-operates both with the centre contact device and said further switch to open the latter when the flashgun is inserted and closed when the flashgun is not present.
Claim 2
Dependent Claim
110 words
In a photographic camera having a flashgun mounting shoe with a centre contact device disposed therein, a cable socket contact device located on the camera, a first circuit comprising a synchronous shutter switch and said centre contact device, a second circuit comprising said synchronous shutter switch and said cable socket contact device, the provision of a. a further switch arranged in said second circuit, b. an insulating slide located in said shoe and adapted to be operated by the flashgun and which co-operates both with the centre contact device and said further switch to open the latter when the flashgun is inserted and closed when the flashgun is not present.
Claim 3
Dependent Claim
41 words
A photographic camera according to claim 1, including an abutment engageable by the flashgun for moving said slide on insertion of the flashgun and spring means to urge said slide in opposition to the direction in which the fLashgun is inserted.
Claim 4
Dependent Claim
40 words
A photographic camera according to claim 2, wherein the slide has on one side an aperture to allow contact to be made by the centre contact device and may include a further abutment for closing and opening the further switch.
References Cited (Backward Citations)
US3355559A
Cited
US3286612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |