Patent US4015701A successfully refreshed from Google Patents.
US3633480A
Expired / Lapsed
US
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Safety windup device for camera
Assignee: Nikon Corp
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Filing: 1970-11-02
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Granted: 1972-01-11
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Expires: 1990-11-02
Abstract
Abstract A safety windup device used with a camera in which a shutter release shaft even in a somewhat lowered position may be raised by normal windup action into a position for permitting windup operation to be accomplished. The shutter release shaft has a beveled lower end face, and a release limiting member has a complementary beveled surface for cooperating with the beveled end surface of the shutter release shaft to raise the shaft.
Inventors
- 👤 Hidenobu Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:56
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/28; G03B17/30; G03B17/305; G03B17/42
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
119 words
A safety windup device comprising a release control cam member and a windup limiting cam member both securely mounted on a common windup shaft, a release limiting member adapted to retain a shutter release shaft in response to actuation of said release control cam member, said shutter release shaft having a sloped end face at one end thereof, said release limiting member having a sloped surfacE opposed and complementary to said sloped end face of said shutter release shaft, a windup limiting lever adapted to retain said windup limiting cam member, and a slide member adapted to engage and disengage said windup limiting lever with said windup limiting cam member in response to windup operation and completed shutter operation.
Claim 2
Dependent Claim
119 words
A safety windup device comprising a release control cam member and a windup limiting cam member both securely mounted on a common windup shaft, a release limiting member adapted to retain a shutter release shaft in response to actuation of said release control cam member, said shutter release shaft having a sloped end face at one end thereof, said release limiting member having a sloped surfacE opposed and complementary to said sloped end face of said shutter release shaft, a windup limiting lever adapted to retain said windup limiting cam member, and a slide member adapted to engage and disengage said windup limiting lever with said windup limiting cam member in response to windup operation and completed shutter operation.
Claim 3
Dependent Claim
24 words
A safety windup device according to claim 1, wherein a means is provided to actuate said slide member to effect said engagement and disengagement.
Claim 4
Dependent Claim
54 words
A safety windup device according to claim 1, wherein said sloped surface of said release limiting member and said sloped end face of said shutter release shaft are vertically spaced apart a predetermined distance to permit said shutter release shaft, if lowered to a certain degree, to be raised by said release limiting member.
Claim 5
Dependent Claim
24 words
A safety windup device according to claim 2, wherein said means for actuating said slide member comprises a combination of spring and lever means.
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |