Patent US3848984A successfully refreshed from Google Patents.
US3848984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single lens reflex camera
Assignee: Pentax Corp
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Filing: 1974-03-11
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Granted: 1974-11-19
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Expires: 1994-03-11
Abstract
Abstract A camera, such as a single lens reflex camera, having a housing and a casing capable of being detachably connected with the housing. The camera housing carries manually operable structure for determining exposure of film in a fully manual manner, the film exposure being determined in accordance with variables which include the diaphgram setting and the exposure time. The camera housing also carries part of a structure for automatically determining one of these variables, with the remaining structure for automatically determining this one variable being carried by the casing so that when the latter is connected with the camera housing it is possible to determine at least this one variable in an automatic manner. A structure which is carried by the camera housing for movement in preparation for making an exposure has its movement transmitted to structure in the casing for controlling the structure in the casing to make at least part of an automatic determination of this one variable.
Inventors
- 👤 K Kanno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:03
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/089; G03B7/087
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
229 words
In a camera, housing means, casing means, and means detachably connecting said casing means to said housing means, said housing means carrying manually operable means for manually determining exposure variables which include exposure time and diaphragm aperture, and automatic means for automatically determining at least one of said variables, said automatic means being carried in part by said housing means and in part by said casing means so that when the latter is detached from said housing means a fully manual operation of the camera can be achieved while when said casing means is connected with said housing means automatic determination of at least said one variable can be achieved, said housing means carrying a movable means supported by said housing means for movement in preparation for making an exposure, and motion transmitting means extending between said housing means and casing means when the latter is connected with said housing means for transmitting movement from said movable means through said motion transmitting means to the interior of said casing means, said casing means carrying in its interior as the part of said automatic means which is situated in said casing means a means which is acted on by said motion transmitting means in response to movement of said movable means for controlling, at least in part, the part of said automatic means which is carried by said casing means.
Claim 2
Dependent Claim
229 words
In a camera, housing means, casing means, and means detachably connecting said casing means to said housing means, said housing means carrying manually operable means for manually determining exposure variables which include exposure time and diaphragm aperture, and automatic means for automatically determining at least one of said variables, said automatic means being carried in part by said housing means and in part by said casing means so that when the latter is detached from said housing means a fully manual operation of the camera can be achieved while when said casing means is connected with said housing means automatic determination of at least said one variable can be achieved, said housing means carrying a movable means supported by said housing means for movement in preparation for making an exposure, and motion transmitting means extending between said housing means and casing means when the latter is connected with said housing means for transmitting movement from said movable means through said motion transmitting means to the interior of said casing means, said casing means carrying in its interior as the part of said automatic means which is situated in said casing means a means which is acted on by said motion transmitting means in response to movement of said movable means for controlling, at least in part, the part of said automatic means which is carried by said casing means.
Claim 3
Dependent Claim
85 words
The combination of claim 1 and wherein the part of said automatic means which is carried by said casing means includes electrical circuitry which has a memory means for storing an electrical quantity corresponding to measured light information, an operating means electrically connected with said memory means for determining at least in part the extent of exposure in accordance with said quantity, and control means electrically connected with said operating means to respond thereto for controlling the extent of exposure provided by said one variable.
Claim 4
Dependent Claim
20 words
The combination of claim 2 and wherein said memory means includes a switch acted upon by said motion transmitting means.
Claim 5
Dependent Claim
21 words
The combination of claim 2 and wherein said memory means includes a variable resistor acted upon by said motion transmitting means.
Claim 6
Dependent Claim
63 words
The combination of claim 2 and wherein said housing means carries a shutter-tripping plunger to be manually operated by the operator to make an exposure, said plunger forming said movable means and said motIon transmitting means responding to movement of said plunger for transmitting the latter movement to said means in said casing means which is acted upon by said motion transmitting means.
Claim 7
Dependent Claim
65 words
The combination of claim 2 and wherein the housing means carries a mechanism operating in connection with swinging of a mirror and stopping down of a diaphragm of the camera, said mechanism forming said movable means and said motion transmitting means responding to movement of said mechanism for acting on the means in said casing means which responds to movement of said motion transmitting means.
Claim 8
Dependent Claim
12 words
The combination of claim 2 and wherein said variable is exposure time.
Claim 9
Dependent Claim
77 words
The combination of claim 2 and wherein said housing means and casing means include positioning means for determining the position of said casing means with respect to said housing means when said casing means is connected with said housing means, and said housing means and casing means also carrying electrical connecting means for electrically connecting electrical structure in said casing means and housing means to each other when said casing means is connected with said housing 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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |