US4284336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic focusing camera
Assignee: West Electric Co Ltd
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Filing: 1979-10-18
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Granted: 1981-08-18
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Expires: 1999-10-18
Abstract
Abstract An automatic focusing camera wherein after the distance to object has been measured automatically by an ultrasonic or optical distance measuring means, a photographic lens is automatically shifted from the minimum focusing distance position to the infinity position and a shutter is released automatically without stopping the lens when the lens is shifted to such a position where the image of an object is in sharp focus.
Inventors
- 👤 Hiroshi Iwata
- 👤 Wataru Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:08
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/28; G02B7/40
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
An automatic focusing camera capable of automatically measuring the distance to an object and focusing the image of said object, characterized by the provision of (a) a power supply control means for controlling the power supply from a power source, (b) a distance measuring means for measuring the distance to said object, (c) a lens shift means for continuously shifting a lens between the minimum focusing distance position and the infinity position, (d) a lens position sensing means for sensing the position of said lens, and (e) a shutter control means responsive to both the signals from said distance measuring means and said lens position sensing means for controlling the release of a shutter, whereby said shutter may be released while said lens is being shifted.
Claim 2
Dependent Claim
126 words
An automatic focusing camera capable of automatically measuring the distance to an object and focusing the image of said object, characterized by the provision of (a) a power supply control means for controlling the power supply from a power source, (b) a distance measuring means for measuring the distance to said object, (c) a lens shift means for continuously shifting a lens between the minimum focusing distance position and the infinity position, (d) a lens position sensing means for sensing the position of said lens, and (e) a shutter control means responsive to both the signals from said distance measuring means and said lens position sensing means for controlling the release of a shutter, whereby said shutter may be released while said lens is being shifted.
Claim 3
Dependent Claim
72 words
An automatic focusing camera as set forth in claim 1 further characterized in that said distance measuring means includes an ultrasonic or optical means which is actuated by the energy supplied from said power source through said power supply control means which is actuated in response to the depression of a shutter button, and said power supply control means is deactivated or disabled when said lens is returned to its initial position.
Claim 4
Dependent Claim
97 words
An automatic focusing camera as set forth in claim 1 further characterized in that said shutter control means has an electromagnet which opens and closes the shutter, a voltage whose level represents the distance to object is stored in a memory means, the level of said voltage stored in said memory means is compared with the level of the output signal from said lens position sensing means so as to control said electromagnet, and there is provided a means for forcibily energizing said electromagnet when said shutter control means has not operated within a predetermined time interval.
References Cited (Backward Citations)
US3713371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |