Patent US1076592A successfully refreshed from Google Patents.
Patent US3713372A successfully refreshed from Google Patents.
US3713372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic shutter with reciprocating shutter blade driving member and electronic timing device
Assignee: Hittech Prontor GmbH
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Filing: 1971-03-18
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Granted: 1973-01-30
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Expires: 1991-03-18
Abstract
Abstract A photographic shutter having a driving member which when moved from a normal position moves the shutter blades by means of a reciprocating actuating member first into an open and then into a closed position. An electronic timing device controls an armature lever which is subject to the action of a return spring. The armature lever cooperates with a lever blocking the actuating member in the open position of the blades for the duration of the timing action. An additional disengaging member is provided which, when the driving member is returned to its normal position, disengages the catch lever.
Inventors
- 👤 H Schill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:22
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/58
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
115 words
A photographic shutter having blade members forming a part thereof comprising a driving member to move the shutter blades from a normal position into an open position following a selected open-time period, an armature lever and a return spring to position the lever, a second lever for blocking the actuating means in the open position of the shutter blades, electronic means to control the movement and timing of the armature lever to release said second lever, means for holding the shutter in its open position for the duration of a selected and controllable time action, and a supplementary disengaging member to disengage the blocking lever upon return of the driving member to its normal position.
Claim 2
Dependent Claim
115 words
A photographic shutter having blade members forming a part thereof comprising a driving member to move the shutter blades from a normal position into an open position following a selected open-time period, an armature lever and a return spring to position the lever, a second lever for blocking the actuating means in the open position of the shutter blades, electronic means to control the movement and timing of the armature lever to release said second lever, means for holding the shutter in its open position for the duration of a selected and controllable time action, and a supplementary disengaging member to disengage the blocking lever upon return of the driving member to its normal position.
Claim 3
Dependent Claim
115 words
A photographic shutter having blade members forming a part thereof comprising a driving member to move the shutter blades from a normal position into an open position following a selected open-time period, an armature lever and a return spring to position the lever, a second lever for blocking the actuating means in the open position of the shutter blades, electronic means to control the movement and timing of the armature lever to release said second lever, means for holding the shutter in its open position for the duration of a selected and controllable time action, and a supplementary disengaging member to disengage the blocking lever upon return of the driving member to its normal position.
Claim 4
Dependent Claim
115 words
A photographic shutter having blade members forming a part thereof comprising a driving member to move the shutter blades from a normal position into an open position following a selected open-time period, an armature lever and a return spring to position the lever, a second lever for blocking the actuating means in the open position of the shutter blades, electronic means to control the movement and timing of the armature lever to release said second lever, means for holding the shutter in its open position for the duration of a selected and controllable time action, and a supplementary disengaging member to disengage the blocking lever upon return of the driving member to its normal position.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |