US3581647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Releasing device for cameras with automatic film advance
Assignee: Robot Foto and Electronic GmbH and Co KG
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Filing: 1968-06-12
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Granted: 1971-06-01
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Expires: 1988-06-12
Abstract
Abstract A relay is employed which has normally open contacts and normally closed contacts. A first series electrical circuit is formed from a source of electrical power through a manually operable switch, the normally closed contacts, and a solenoid for actuating the camera release button. A second series electrical circuit is formed through the relay coil, the flashlight contacts of the camera (which are closed when the shutter is operated) and the source of power. A capacitor and adjustable resistor are connected in series across the relay coil. The normally open relay contacts are connected in a series circuit with a signal light and the source of power.
Inventors
- 👤 Herbert Maronde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:34
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/58; G03B17/00; G03B17/42; G03B9/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
143 words
In a camera apparatus having a solenoid to actuate the shutter, and a series electrical circuit to energize the solenoid which circuit includes a tripping switch, the improvement comprising: shutter switch means operatively connected to the shutter for forming an electrical connection when the shutter is operated; a relay having a coil and contacts which are normally closed and are opened upon the energization of the coil, said contacts being in said series circuit so that the solenoid is not energized when the contacts are open; and circuit means connecting said coil and said shutter switch means for energizing said coil when said shutter switch means forms said electrical connection, said circuit means including means for delaying the opening of the relay contacts upon the energizing of the coil, the last means comprising an adjustable resistance-capacitor device connected in parallel with said coil.
Claim 2
Dependent Claim
143 words
In a camera apparatus having a solenoid to actuate the shutter, and a series electrical circuit to energize the solenoid which circuit includes a tripping switch, the improvement comprising: shutter switch means operatively connected to the shutter for forming an electrical connection when the shutter is operated; a relay having a coil and contacts which are normally closed and are opened upon the energization of the coil, said contacts being in said series circuit so that the solenoid is not energized when the contacts are open; and circuit means connecting said coil and said shutter switch means for energizing said coil when said shutter switch means forms said electrical connection, said circuit means including means for delaying the opening of the relay contacts upon the energizing of the coil, the last means comprising an adjustable resistance-capacitor device connected in parallel with said coil.
Claim 3
Dependent Claim
57 words
In an apparatus as set forth in claim 1, whErein said relay has a second set of contacts which are normally open and are closed when said coil is energized; a signal element; and circuit means connecting said second set of contacts and said element for energizing said element when said second set of contacts are closed.
Claim 4
Dependent Claim
156 words
In a camera apparatus having a solenoid to actuate the shutter, and a series electrical circuit to energize the solenoid which circuit includes a tripping switch, the improvement comprising: shutter switch means operatively connected to the shutter for forming an electrical connection when the shutter is operated; a relay having a coil and contacts which are normally closed and are opened upon the energization of the coil, said contacts being in said series circuit so that the solenoid is not energized when the contacts are open, said relay having a second set of contacts which are normally open and are closed when said coil is energized; circuit means connecting said coil and said shutter switch means for energizing said coil when said shutter switch means forms said electrical connection; a signal element; and circuit means connecting said second set of contacts and said element for energizing said element when said second set of contacts are closed.
Claim 5
Dependent Claim
156 words
In a camera apparatus having a solenoid to actuate the shutter, and a series electrical circuit to energize the solenoid which circuit includes a tripping switch, the improvement comprising: shutter switch means operatively connected to the shutter for forming an electrical connection when the shutter is operated; a relay having a coil and contacts which are normally closed and are opened upon the energization of the coil, said contacts being in said series circuit so that the solenoid is not energized when the contacts are open, said relay having a second set of contacts which are normally open and are closed when said coil is energized; circuit means connecting said coil and said shutter switch means for energizing said coil when said shutter switch means forms said electrical connection; a signal element; and circuit means connecting said second set of contacts and said element for energizing said element when said second set of contacts are closed.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |