US4636055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera
Assignee: Canon Inc
•
Filing: 1985-03-28
•
Granted: 1987-01-13
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Expires: 2005-03-28
Abstract
Abstract In the disclosed camera, the display indicating the camera's operating condition is visible from outside of the camera housing. When a lens cap, barrier, or other operating member makes it substantially impossible to expose the film in the camera, the information on the display is erased to warn the user that the camera is not ready for shooting film.
Inventors
- 👤 Kiyoshi Alyfuku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:24
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/18
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
99 words
A camera comprising, (A) A display circuit for displaying information necessary for exposing film; (B) exposure interrupting means for making it substantially impossible for said camera to expose film; (C) switching means for erasing display of said display circuit in response to the exposure interrupting means becoming operative, and for causing said display circuit to display in response to the operative state of the exposure interrupting means being released; and (D) intrusion means for causing said display circuit to display necessary information even when said exposure interrupting means has made it substantially impossible for said camera to expose film.
Claim 2
Dependent Claim
99 words
A camera comprising, (A) A display circuit for displaying information necessary for exposing film; (B) exposure interrupting means for making it substantially impossible for said camera to expose film; (C) switching means for erasing display of said display circuit in response to the exposure interrupting means becoming operative, and for causing said display circuit to display in response to the operative state of the exposure interrupting means being released; and (D) intrusion means for causing said display circuit to display necessary information even when said exposure interrupting means has made it substantially impossible for said camera to expose film.
Claim 3
Dependent Claim
29 words
A camera according to claim 1, wherein said intrusion means includes charging state detecting means for causing said display circuit to display a charging state of a flash device.
Claim 4
Dependent Claim
29 words
A camera according to claim 1, wherein said intrusion means includes blank feeding state detecting means for causing said display circuit to display a blank feeding state of film.
Claim 5
Dependent Claim
29 words
A camera according to claim 3, wherein said blank feeding state detecting means includes timer means for operating said blank feeding state detecting means only for a predetermined time.
Claim 6
Dependent Claim
35 words
A camera according to claim 3, wherein said camera includes a shutter and said blank feeding state detecting means includes inhibition means for inhibiting release of the shutter when detecting a failure of blank feeding.
Claim 7
Dependent Claim
27 words
A camera according to claim 1, wherein said intrusion means includes feeding state detecting means for causing said display circuit to display a feeding state of film.
Claim 8
Dependent Claim
29 words
A camera according to claim 6, wherein said feeding state detecting means includes feeding response means for causing said display circuit to display only during the feeding of film.
Claim 9
Dependent Claim
15 words
A camera according to claim 7, wherein said feeding state includes a blank feeding state.
Claim 10
Dependent Claim
14 words
A camera according to claim 7, wherein said feeding state includes a rewinding state.
Claim 11
Dependent Claim
94 words
A camera comprising: (A) a display circuit for displaying information; (B) exposure interrrupting means for making it substantially impossible for said camera to perform photography; (C) switching means for erasing display of said display circuit in response to the exposure interrupting means becoming operative, and for causing said display circuit to display in response to the operative state of the exposure interrupting means being released; and (D) intrusion means for causing said display circuit to display necessary information even when said exposure interrupting means makes it substantially impossible for said camera to perform photography.
Claim 12
Dependent Claim
94 words
A camera comprising: (A) a display circuit for displaying information; (B) exposure interrrupting means for making it substantially impossible for said camera to perform photography; (C) switching means for erasing display of said display circuit in response to the exposure interrupting means becoming operative, and for causing said display circuit to display in response to the operative state of the exposure interrupting means being released; and (D) intrusion means for causing said display circuit to display necessary information even when said exposure interrupting means makes it substantially impossible for said camera to perform photography.
Claim 13
Dependent Claim
38 words
A camera according to claim 10, wherein light sensitive means are exposed in the camera and said intrusion means includes feed state indicating means for causing said display circuit to display a feed state of light sensitive means.
Claim 14
Dependent Claim
27 words
A camera according to claim 11, wherein said feeding state indicating means includes feed response means for causing said display circuit to display during the feeding operating.
Claim 15
Dependent Claim
19 words
A camera according to claim 12, wherein said feed response means includes latch means for maintaining the displaying state.
Claim 16
Dependent Claim
14 words
A camera according to claim 13, wherein said latch means includes a flip-flop circuit.
Claim 17
Dependent Claim
33 words
A camera according to claim 11, wherein said feed state indicating means includes blank feeding state indicator means for causing said display circuit to display a blank feeding state of light sensitive means.
Claim 18
Dependent Claim
35 words
A camera according to claim 15, wherein said blank feeding state indicator means includes timer means for causing said display circuit to display a blank feeding state of light sensitive means for a predetermined time.
Claim 19
Dependent Claim
32 words
A camera according to claim 15, wherein said blank feed state indicator means includes evidencing means for evidencing failure of the blank feeding in said display circuit if the blank feeding fails.
Claim 20
Dependent Claim
27 words
A camera according to claim 17, wherein said blank feeding failure evidencing means includes flicker indication control means for effecting a flicker indication in said display circuit.
Claim 21
Dependent Claim
36 words
A camera according to claim 15, wherein said blank feeding state indicator means includes blank feeding success indicating means for indicating success of the blank feeding in said display circuit if the blank feeding is successful.
Claim 22
Dependent Claim
32 words
A camera according to claim 19, wherein said blank feeding success indicating means includes timer means for evidencing for a predetermined time in said display circuit that the blank feeding is successful.
Claim 23
Dependent Claim
31 words
A camera according to claim 11, wherein said feed state indicating means includes rewinding state indicating means for causing said display circuit to display a rewinding state of light sensitive means.
Claim 24
Dependent Claim
27 words
A camera according to claim 17, wherein said blank feeding failure indicator means includes an inhibition means for inhibiting an exposure operation when the blank feeding fails.
Claim 25
Dependent Claim
29 words
A camera according to claim 10, wherein said intrusion means includes charging state indicating means for causing said display circuit to display a charging state of a flash device.
References Cited (Backward Citations)
US4240735A
Cited
US4483601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-12 | 1990-07-14 | 1991-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-12 | 1994-07-14 | 1995-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-12 | 1998-07-14 | 1999-01-13 | $7700.00 | Window Closed / Lapsed |