US3645190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic shutter with an electronic timing device
Assignee: Hittech Prontor GmbH
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Filing: 1969-12-10
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Granted: 1972-02-29
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Expires: 1989-12-10
Abstract
Abstract The photographic shutter has a reciprocating driving member for moving the shutter blades into open and closed positions. An electronic timing device controls a spring-biased two armed lever, one of the lever arms locks the driving member in the open position of the shutter blades and is advantageously designed to be bendable or collapsible. The bendable lever arm is located in the path of motion of a projection on the driving member so that the projection strikes against the end face of the lever arm before the reversal movement. The pin located on the shutter blade driving member is engageable with this lever arm to return the arm from a collapsing or bent position into an extended position at the end of the shutter closing action.
Inventors
- 👤 Jorg Alfred Sohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:39
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/083
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
131 words
A photographic shutter including a reciprocating driving member moving the shutter blades into the opened and closed positions, an electronic timing device controlling a springbiased two-armed armature lever, one of said lever arms locking said driving member in the open position of said shutter blades, said one of said lever arms cooperating with said driving member being bendable or collapsibly formed and located in the path of movement of a projection on said driving member so that said projection strikes against the end face thereof before the reversal movement, and a pin located on said shutter blade driving member and engageable with said one of said lever arms to return said lever arm from a collapsed or bent position into an extended position at the end of the shutter closing action.
Claim 2
Dependent Claim
131 words
A photographic shutter including a reciprocating driving member moving the shutter blades into the opened and closed positions, an electronic timing device controlling a springbiased two-armed armature lever, one of said lever arms locking said driving member in the open position of said shutter blades, said one of said lever arms cooperating with said driving member being bendable or collapsibly formed and located in the path of movement of a projection on said driving member so that said projection strikes against the end face thereof before the reversal movement, and a pin located on said shutter blade driving member and engageable with said one of said lever arms to return said lever arm from a collapsed or bent position into an extended position at the end of the shutter closing action.
Claim 3
Dependent Claim
54 words
The photographic shutter according to claim 1 wherein said one of said lever associated with the shutter blade driving member is formed as an elbow lever and is retained by means of a pin and slot guide, while the spring acting on the armature lever is connected at the joint of said elbow lever.
Claim 4
Dependent Claim
39 words
The photographic shutter according to claim 1 wherein said one of said lever arms associated with said shutter blade driving member has a flat leaf-type spring rigidly connected therewith, said leaf spring being guided longitudinally between two fixed points.
References Cited (Backward Citations)
US3437026A
Cited
US3476031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |