US3563141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic camera with an automatic, light-dependent exposure setting
Assignee: Hittech Prontor GmbH
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Filing: 1967-03-13
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Granted: 1971-02-16
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Expires: 1987-03-13
Abstract
Abstract A photographic camera having a diaphragm consisting of at least two rotatably mounted blades and an exposure-time-regulating device cooperating with the shutter blade system of the camera, so that by means of an exposure meter built into the camera and a scanning device associated therewith, both light stop and exposure time are automatically controllable in an ''''AUTO'''' range and are presettable manually in another range. The camera has simple automatic programming whereby a part of the components of the automatic programming system is utilized for manually setting the light stop and the exposure time as well as for actuating a working range indicator by a highly advantageous configuration and correlation of parts with a minimum of structural expense. Thus, the camera has a control member, forming part of the exposure-time-regulating device and participating in the positioning motions of the diaphragm blades, that engages one of the diaphragm blades directly, and wherein its setting determines the duration of the exposure by the shutter sectors.
Inventors
- 👤 Pranz W R Starp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:09
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/12
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
212 words
A photographic camera comprising: a shutter blade system; a diaphragm having at least two pivoted blades; an exposure-timeregulating device cooperating with said shutter blade system; an exposure meter built into said camera and a scanning device cooperating therewith for automatically controlling both the light stop and exposure time factors in an ''''AUTO'''' range and for manually presetting both of said factors in another range; control part engaging one of said diaphragm blades and participating in the setting motions of the said diaphragm blades, said control part forming a part of said exposure-timeregulating device, the setting of which part determines the duration of the exposure by said shutter blade system and wherein said control part of said exposure-time-regulating device is a pivotally mounted catch lever having one end biased against the back portion of said one of said diaphragm blades, and wherein a braking weight is provided having a plurality of radially stepped cam surfaces cooperating with said one end of said catch lever, said braking weight being engageable with said shutter blade system to participate in the opening motion thereof and mounted for back-and-forth movement to swing beyond the reversal phase of said shutter blade system against the force of a return spring, said shutter blade system being movable back and forth.
Claim 2
Dependent Claim
212 words
A photographic camera comprising: a shutter blade system; a diaphragm having at least two pivoted blades; an exposure-timeregulating device cooperating with said shutter blade system; an exposure meter built into said camera and a scanning device cooperating therewith for automatically controlling both the light stop and exposure time factors in an ''''AUTO'''' range and for manually presetting both of said factors in another range; control part engaging one of said diaphragm blades and participating in the setting motions of the said diaphragm blades, said control part forming a part of said exposure-timeregulating device, the setting of which part determines the duration of the exposure by said shutter blade system and wherein said control part of said exposure-time-regulating device is a pivotally mounted catch lever having one end biased against the back portion of said one of said diaphragm blades, and wherein a braking weight is provided having a plurality of radially stepped cam surfaces cooperating with said one end of said catch lever, said braking weight being engageable with said shutter blade system to participate in the opening motion thereof and mounted for back-and-forth movement to swing beyond the reversal phase of said shutter blade system against the force of a return spring, said shutter blade system being movable back and forth.
Claim 3
Dependent Claim
80 words
The photographic camera of claim 1 wherein said diaphragm blades have an override extending beyond the opening of said camera; and wherein said one of said diaphragm blades, said catch lever and said braking weight are configured so that differing exposure times are achievable only in the area of said override, and wherein upon the entry of said diaphragm blades into the area of said opening of said camera the exposure time remains constant as the diaphragm opening narrows steadily.
Claim 4
Dependent Claim
47 words
The photographic camera of claim 2 wherein said configuration of said one diaphragm blade, said catch lever and said braking weight is such that the light stop and exposure time can be changed jointly so that differing exposure values according to a predetermined program are thereby achievable.
Claim 5
Dependent Claim
90 words
The photographic camera of claim 1 wherein said catch lever supported at said one end against said one of the diaphragm blades is a two-armed lever engageable by a setter; said setter being operable to set said camera to automatic or manual light stop setting and having a supporting edge which becomes effective when set to said manual light stop setting, said edge being engageable with said catch lever for movement to a position in which an exposure time is achieved suitable for pictures taken free hand or with flashbulbs.
Claim 6
Dependent Claim
59 words
The photographic camera of claim 4 wherein said setter serving to set said camera from one to the other working range is mounted on a housing of said exposure meter for corotation and wherein a switch is provided in the circuit of said exposure meter for short circuiting said meter during the reversal from automatic to manual exposure setting.
Claim 7
Dependent Claim
54 words
The photographic camera of claim 5 wherein said setter and said housing of said exposure meter are configured so that upon short circuiting; said corotating motion positions an exposure meter pointer wherein with the aid of said scanning device cooperating with said pointer, the light stop value preset by means of said setter results.
Claim 8
Dependent Claim
39 words
The photographic camera of claim 6 wherein said housing of said exposure meter has a stop located in the plane of motion of said pointer against which stop said pointer comes to rest after said meter is short circuited.
Claim 9
Dependent Claim
87 words
The photographic camera of claim 4 wherein an indicating scale is associated with said exposure meter, said scale having harmonizing time and light stop values; and wherein an indicating flag is provided for said scale disposed so that said flag makes said scale visible in the ''''AUTO'''' setting of said setter, said flag being operable by said setter for movement in front of said scale in the ''''Manual'''' and flash working range wherein only the light stop values which can be set in that range are visible.
Claim 10
Dependent Claim
38 words
The photographic camera of claim 8 wherein a portion of said flag covering said scale values has symbols of a flash and of time value of the exposure time becoming effective in the ''''Manual'''' and flash working range.
Claim 11
Dependent Claim
201 words
A photographic camera comprising: shutter blade means on said camera; diaphragm means on said camera having a plurality of pivoted blades; an exposure meter; scanning means engageable with said exposure meter and said diaphragm means, said exposure meter and said scanning means automatically controlling both light stop and exposure time factors in an ''''AUTO'''' range and for manually presetting both of said factors in another range; and an exposure-time-regulating device having a pivotally mounted control lever engaging one of said diaphragm blades and movable during the setting motion thereof; and a braking weight being engageable with said shutter blade means and mounted to swing beyond the reversal phase of said shutter blade means and wherein said control lever is a pivotally mounted catch lever having one end biased against the back portion of said one of said diaphragm blades, and wherein said braking weight has a plurality of stepped cam surfaces cooperating with said one end of said catch lever, and wherein said braking weight is engageable with said shutter blade system in the opening motion thereof and is mounted for back-and-forth movement to swing beyond the reversal phaSe of said shutter blade system against the force of a return spring.
Claim 12
Dependent Claim
201 words
A photographic camera comprising: shutter blade means on said camera; diaphragm means on said camera having a plurality of pivoted blades; an exposure meter; scanning means engageable with said exposure meter and said diaphragm means, said exposure meter and said scanning means automatically controlling both light stop and exposure time factors in an ''''AUTO'''' range and for manually presetting both of said factors in another range; and an exposure-time-regulating device having a pivotally mounted control lever engaging one of said diaphragm blades and movable during the setting motion thereof; and a braking weight being engageable with said shutter blade means and mounted to swing beyond the reversal phase of said shutter blade means and wherein said control lever is a pivotally mounted catch lever having one end biased against the back portion of said one of said diaphragm blades, and wherein said braking weight has a plurality of stepped cam surfaces cooperating with said one end of said catch lever, and wherein said braking weight is engageable with said shutter blade system in the opening motion thereof and is mounted for back-and-forth movement to swing beyond the reversal phaSe of said shutter blade system against the force of a return spring.
Claim 13
Dependent Claim
103 words
The photographic camera of claim 10 wherein said diaphragm blades have an override extending beyond the opening of said camera and wherein said lever supported at said one end against said one of the diaphragm blades is a two-armed lever engageable by a setter; said setter being operable to set said camera to automatic or manual light stop setting and having a supporting edge, said edge being engageable with said catch lever when set to said manual light stop setting movement of said lever to a position in which an exposure time is achieved suitable for pictures taken free hand or with flashbulbs.
Claim 14
Dependent Claim
64 words
The photographic camera of claim 11 wherein said setter serving to set said camera from one to the other working range is mounted on said exposure meter for corotation therewith; and wherein a switch operable by said setter is provided in the circuit of said exposure meter for short circuiting said meter during the reversal of said setter from automatic to manual exposure setting.
Claim 15
Dependent Claim
43 words
The photographic camera of claim 12 wherein said exposure meter has a stop located in the plane of motion of a pointer of said exposure meter against which stop said pointer comes to rest after said meter is short circuited by said switch.
Claim 16
Dependent Claim
87 words
The photographic camera of claim 13 wherein an indicating scale is provided for said exposure meter, said scale having harmonizing time and light stop values; and wherein an indicating flag is provided for said scale disposed so that said flag makes said scale visible in the ''''AUTO'''' setting of said setter, said flag being operable by said setter for movement in front of said scale in the ''''Manual'''' and flash working range wherein only the light stop values which can be set in that range are visible.
Claim 17
Dependent Claim
105 words
A photographic camera including shutter means, a pair of rotatably mounted blades, exposure-time-regulating means cooperating with said shutter means, said exposure-time-regulating means having a manual range for presetting both light stop and exposure time factors, an exposure meter built into said camera, scanning means cooperating with said exposure meter automatically controlling both the light stop and exposure time factors in an ''''AUTO'''' range, said time-regulating means having a control lever engageable with one of said blades during the setting movement of said blades, said scanning means acting directly on said control lever so that the position setting of said control lever determines the exposure time.
Claim 18
Dependent Claim
105 words
A photographic camera including shutter means, a pair of rotatably mounted blades, exposure-time-regulating means cooperating with said shutter means, said exposure-time-regulating means having a manual range for presetting both light stop and exposure time factors, an exposure meter built into said camera, scanning means cooperating with said exposure meter automatically controlling both the light stop and exposure time factors in an ''''AUTO'''' range, said time-regulating means having a control lever engageable with one of said blades during the setting movement of said blades, said scanning means acting directly on said control lever so that the position setting of said control lever determines the exposure time.
References Cited (Backward Citations)
US3021770A
Cited
US3117503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |