Patent US4429975A successfully refreshed from Google Patents.
US4429975A
Expired / Lapsed
US
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Control circuit for cameras having internal and external power supplies
Assignee: KONISHIRKU PHOTO INDUSTRY CO Ltd A CORP OF
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Filing: 1982-05-19
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Granted: 1984-02-07
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Expires: 2002-05-19
Abstract
Abstract A camera may contain a plurality of operable elements such as small motors for actuating mechanisms such as a mirror, shutter, diaphragm, film, transport, etc., supplied with power from a self-contained battery. Because of the low power of the battery certain of the operable elements are actuated sequentially whereas parallel operation thereof would be preferable. The present invention provides circuitry which automatically changes the sequential operation of the elements to parallel operation whenever the self-contained source of power is replaced by an external power source.
Inventors
- 👤 Kazuo Shiozawa
- 👤 Hideaki Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:27
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/42; G03B17/425
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
75 words
In a camera of the type in which a plurality of operable elements are operated by a source of power contained therein, the improvement comprising means controlling certain of said elements for sequential operation when connected to said contained source of power, an external source of power, means connecting said external source of power to said operable elements and means responsive to implementation of said connecting means for controlling said certain elements for parallel operation.
Claim 2
Dependent Claim
75 words
In a camera of the type in which a plurality of operable elements are operated by a source of power contained therein, the improvement comprising means controlling certain of said elements for sequential operation when connected to said contained source of power, an external source of power, means connecting said external source of power to said operable elements and means responsive to implementation of said connecting means for controlling said certain elements for parallel operation.
Claim 3
Dependent Claim
27 words
In a camera according to claim 1 in which said improvement includes means disabling said contained power source when said external source is connected to the camera.
Claim 4
Dependent Claim
42 words
In a camera according to claim 1 in which said improvement comprises means for reconnecting said contained source of power to said elements whenever the voltage of said external source of power falls below the voltage of the contained source of power.
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) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |