US4718758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera
Assignee: Canon Inc
•
Filing: 1986-12-16
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Granted: 1988-01-12
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Expires: 2006-12-16
Abstract
Abstract A camera of the kind permitting a continuous photographing operation is provided with control means which is arranged to control a period of time between a pushing operation on a shutter release button and the start of the travel of a leading shutter curtain to be a predetermined length of time for a first frame and to control the leading shutter curtain travel starting time according to a signal indicative of completion of preparation for the shutter travel for each of a second and subsequent frames.
Inventors
- 👤 Masaharu Kawamura
- 👤 Yoshihito Harada
- 👤 Ryuichi Kobayashi
- 👤 Masayuki Suzuki
- 👤 Tsunemasa Ohara
- 👤 Yoichi Tosaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:13
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/24; G03B17/00; G03B17/42; G03B17/425
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
151 words
A continuously photographable camera, comprising: (a) a shutter release button; (b) shutter operating means for causing a shutter device to operate; (c) preparatory operation means for causing a preparatory operation device to operate prior to the travel of the shutter; and (d) continuous photographing operation control means including: (d-1) means for making for the first of consecutive frames a period of time between a release operation on said shutter release button and the start of operation of said shutter device a predetermined length of time, which is set to be somewhat longer than a maximum length of time required for the operation of said preparatory operation device operating prior to said shutter travel; and (d-2) means for controlling, for the second and subsequent frames, the start of operation of said shutter operating means on the basis of completion of operation of said preparatory operation device operating prior to said shutter travel.
Claim 2
Dependent Claim
151 words
A continuously photographable camera, comprising: (a) a shutter release button; (b) shutter operating means for causing a shutter device to operate; (c) preparatory operation means for causing a preparatory operation device to operate prior to the travel of the shutter; and (d) continuous photographing operation control means including: (d-1) means for making for the first of consecutive frames a period of time between a release operation on said shutter release button and the start of operation of said shutter device a predetermined length of time, which is set to be somewhat longer than a maximum length of time required for the operation of said preparatory operation device operating prior to said shutter travel; and (d-2) means for controlling, for the second and subsequent frames, the start of operation of said shutter operating means on the basis of completion of operation of said preparatory operation device operating prior to said shutter travel.
Claim 3
Dependent Claim
25 words
A camera according to claim 1, wherein said continuous photographing is arranged to be carried out by a continuous operation on said shutter release button.
Claim 4
Dependent Claim
47 words
A camera according to claim 1, wherein said shutter operating means includes a leading shutter curtain operating electromagnet arranged to allow a leading shutter curtain to begin to travel; and a trailing shutter curtain operating electromagnet arranged to allow a trailing shutter curtain to begin to travel.
Claim 5
Dependent Claim
45 words
A camera according to claim 1, wherein said preparatory operation means includes an aperture stopping-down action starting arrangement and a first signal generating circuit arranged to generate a signal indicative of completion of a stopping down action on an aperture to a preset aperture value.
Claim 6
Dependent Claim
70 words
A camera according to claim 1, wherein said preparatory operation means includes an aperture stopping-down action starting arrangement, a first signal generating circuit arranged to generate a signal indicative of completion of a stopping down action on an aperture to a preset aperture value, a moving mirror uplifting action starting arrangement and a second signal generating circuit arranged to generate a signal indicative of completion of a mirror uplifting action.
Claim 7
Dependent Claim
41 words
A camera according to claim 4, wherein said control means has said predetermined length of time set at a length of time which is somewhat longer than a length of time required for stopping said aperture down to a smallest aperture
Claim 8
Dependent Claim
55 words
A camera according to claim 5, wherein said control means is arranged to control, for the second and subsequent frames, the start of operation of said shutter operating means on the basis of either said aperture stopping down action completion signal or said mirror uplifting action completion signal whichever is generated later than the other.
References Cited (Backward Citations)
US4086603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |