Patent US3750550A successfully refreshed from Google Patents.
US3750550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Still camera with an electronically controlled shutter and a receiver for a photo-flash device
Assignee: Minox GmbH
•
Filing: 1972-10-20
•
Granted: 1973-08-07
•
Expires: 1992-10-20
Abstract
Abstract There is disclosed a still camera with an electronically controlled shutter and a receiver for a photo-flash device. The circuit system in the camera controls the opening time of the shutter in accordance with the incident light and includes for this purpose a light-sensitive resistor and a normally closed switch. The photo-flash device includes a resistor and a circuit component which is insertable into the receiver of the camera. Insertion of this circuit component into the camera receiver device disconnects the light-sensitive resistor in the control circuit on the camera and connects instead the resistor on the flash device to the control system of the camera. The resistor on the flash device has a resistance such that the circuit control system on the camera automatically sets the shutter opening time to the optimal shutter opening time for the flash device.
Inventors
- 👤 R Kasemeier
- 👤 K Behr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:24
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/70; G03B15/00; G03B15/02; G03B15/03; G03B15/04; G03B15/041; G03B15/0421
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
137 words
A still camera with an electronically controlled shutter and a receiver for a photo-flash device, comprising in combination: in the camera, a circuit system controlling the opening time of the shutter and including a light-sensitive circuit component and a normally closed switch means; and a photo-flash device including a shutter opening time controlling circuit component and a switching means insertable into the receiver of the camera, insertion of said switching means into the camera receiver disconnecting the lightsensitive circuit component in the control circuit system on the camera and connecting the circuit component on the flash device into said control circuit system, said circuit component on the flash device being correlated with the circuit control system on the camera to set the shutter opening time in accordance with the optimal shutter opening time for the flash device.
Claim 2
Dependent Claim
137 words
A still camera with an electronically controlled shutter and a receiver for a photo-flash device, comprising in combination: in the camera, a circuit system controlling the opening time of the shutter and including a light-sensitive circuit component and a normally closed switch means; and a photo-flash device including a shutter opening time controlling circuit component and a switching means insertable into the receiver of the camera, insertion of said switching means into the camera receiver disconnecting the lightsensitive circuit component in the control circuit system on the camera and connecting the circuit component on the flash device into said control circuit system, said circuit component on the flash device being correlated with the circuit control system on the camera to set the shutter opening time in accordance with the optimal shutter opening time for the flash device.
Claim 3
Dependent Claim
39 words
The still camera according to claim 1 wherein the circuit component included in the circuit system on the camera is a light-sensitive resistor and the circuit component on the photo-flash device is a resistor having a substantially constant resistance.
Claim 4
Dependent Claim
53 words
The still camera according to claim 1 wherein said switching means on the photo-flash device comprises pole elements which upon insertion into the receiver on the camera open the normally closed switch means on the camera and simultaneously connect the circuit component on the flash device into the control circuit on the camera.
Claim 5
Dependent Claim
71 words
The still camera according to claim 1 wherein said photo-flash device comprises an adapter means insertable into the receiver on the camera, said adapter means including said shutter opening time controlling circuit component and said switching means for opening the switch means on the camera and simultaneously connecting the circuit component on the adapter in the control circuit system of the camera instead of the circuit component included in said system.
Claim 6
Dependent Claim
51 words
The still camera according to claim 4 wherein said switching means for opening of the switch means on the camera upon insertion of the adapter means into the receiver comprise pole elements, said pole elements further connecting the circuit component on the adapter in the control circuit system on the camera.
Claim 7
Dependent Claim
87 words
The still camera according to claim 1 wherein said photo-flash device comprises a mount for simultaneously mounting several flash bulbs facing in different directions, said mount including said shutter opening time controlling circuit component and being rotatAbly receivable by the receiver on the camera for placing successive flash bulbs in a selected direction, said mount further including said switching means for simultaneously connecting the circuit component on the mount in the circuit control system on the camera and disconnecting the circuit component in said control system therefrom.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |