US3650191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera for making multiple exposures
Assignee: Pentax Corp
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Filing: 1971-01-20
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Granted: 1972-03-21
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Expires: 1991-01-20
Abstract
Abstract A camera capable of making multiple exposures. The camera includes a rotary film spool on which film is wound as well as a film-transporting element for transporting film in the camera. A film advancing mechanism is actuated in order to advance film and cock the shutter, and this latter mechanism frictionally engages the film spool to transmit rotary movement thereto frictionally. The film-transporting structure is capable of being coupled to and uncoupled from the film-advancing mechanism, and a restraining member is provided to be displaced from a nonrestraining position to a restraining position engaging the spool to prevent the latter from being frictionally rotated by the film-advancing structure. A manually operable structure is accessible to be actuated by the operator for placing the restraining member in its restraining position preventing rotation of the film spool and for simultaneously uncoupling the film-transport structure from the film-advancing drive, so that with the parts in this condition the film-advancing structure can be actuated only to cock the shutter, while the film remains stationary in the position it had during the previous exposure, thus enabling a multiple exposure to be made.
Inventors
- 👤 Katsuhiko Nomura
- 👤 Koichiro Watanabe
- 👤 Fumio Urano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:33
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/42; G03B17/425
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
213 words
In a camera, a rotary film spool on which film is wound, film-advancing means for advancing film and for simultaneously cocking a shutter of the camera in preparation for making an exposure, said film-advancing means frictionally engaging said spool for frictionally transmitting rotation thereto, and filmtransporting means for transporting film in the camera; an assembly for making multiple exposures comprising releasable coupling means for releasably coupling said film-advancing means with said film-transporting means, said releasable coupling means having a coupled position transmitting a drive from said filmadvancing means to said film-transporting means and an uncoupled position disconnecting said film-transporting means from said film-advancing means, restraining means having a restraining position engaging said spool to restrain the latter against rotation by frictional engagement with said film-advancing means and a non-restraining position displaced from said spool to free the latter for frictional rotation by said film-advancing means, and manually operable means coacting with said restraining means and said coupling means for placing said restraining means in said restraining position thereof and for simultaneously placing said coupling means in said uncoupled position thereof so that upon actuation of said manually operable means said filmadvancing means can be actuated to cock the shutter without advancing film so as to prepare the camera for making a multiple exposure.
Claim 2
Dependent Claim
213 words
In a camera, a rotary film spool on which film is wound, film-advancing means for advancing film and for simultaneously cocking a shutter of the camera in preparation for making an exposure, said film-advancing means frictionally engaging said spool for frictionally transmitting rotation thereto, and filmtransporting means for transporting film in the camera; an assembly for making multiple exposures comprising releasable coupling means for releasably coupling said film-advancing means with said film-transporting means, said releasable coupling means having a coupled position transmitting a drive from said filmadvancing means to said film-transporting means and an uncoupled position disconnecting said film-transporting means from said film-advancing means, restraining means having a restraining position engaging said spool to restrain the latter against rotation by frictional engagement with said film-advancing means and a non-restraining position displaced from said spool to free the latter for frictional rotation by said film-advancing means, and manually operable means coacting with said restraining means and said coupling means for placing said restraining means in said restraining position thereof and for simultaneously placing said coupling means in said uncoupled position thereof so that upon actuation of said manually operable means said filmadvancing means can be actuated to cock the shutter without advancing film so as to prepare the camera for making a multiple exposure.
Claim 3
Dependent Claim
52 words
The combination of claim 1 and wherein said restraining means is in the form of a swingable lever swingable to and from said restraining position thereof and normally assuming said non-restraining position, said manually operable means engaging said lever for swinging the latter from said non-restraining position to saiD restraining position thereof.
Claim 4
Dependent Claim
54 words
The combination of claim 1 and wherein said manually operable means consists of a single operating button engaging said restraining means and operatively connected with said coupling means for placing said restraining means in said restraining position thereof and for placing said coupling means in said uncoupled position thereof when said button is depressed.
Claim 5
Dependent Claim
51 words
The combination of claim 3 and wherein said button has a partially depressed position where said coupling means is in said uncoupled position thereof while said restraining means is out of engagement with said spool, and means for releasably holding said button in said partially depressed position thereof for rewinding film.
Claim 6
Dependent Claim
138 words
The combination of claim 1 and wherein said manually operable means includes a multiple-exposure button engaging said restraining means to place the latter in said restraining position thereof when said multiple-exposure button is depressed and a rewind button operatively connected with said coupling means for placing the latter in said uncoupled position thereof when said rewind button is depressed, and motion-transmitting means extending between said buttons for transmitting movement of said multiple-exposure button to said rewind button while freeing said rewind button for depression independently of said multiple-exposure button, so that said rewind button of said manually operable means can be independently depressed for rewinding film while said multiple-exposure button is depressed for placing said restraining means in said restraining position and for simultaneously actuating said rewind button to place said coupling means in said uncoupled position thereof.
Claim 7
Dependent Claim
53 words
The combination of claim 5 and wherein a releasable holding means coacts with said rewind button for releasably holding the latter in its depressed position maintaining said coupling means in said uncoupled position thereof upon release of said rewind button after the latter has been depressed when actuated independently of said multiple-exposure button.
Claim 8
Dependent Claim
38 words
The combination of claim 6 and wherein said multiple-exposure button has a portion coacting with said releasable holding means for preventing the latter from holding said rewind button in its depressed position when said multiple-exposure button is depressed.
Claim 9
Dependent Claim
70 words
The combination of claim 7 and wherein said releasable holding means is in the form of a swingable lever, said coupling means including a shaft portion formed with a groove for receiving a part of said lever which when in said groove retains said coupling means in said uncoupled position thereof, and said multiple-exposure button having a camming portion engaging said lever to prevent the latter from entering said groove.
Claim 10
Dependent Claim
61 words
The combination of claim 8 and wherein said motion-transmitting means includes an extension fixed to and extending from said multiple-exposure button and located beside said rewind button, the latter having a lip situated on one side of said extension to be engaged thereby when said multiple-exposure button is depressed while freeing said rewind button for actuation independently of said multiple-exposure button.
Claim 11
Dependent Claim
63 words
The combination of claim 5 and wherein said motion-transmitting means includes an extension fixed to and extending from said multiple-exposure button up to the region of said rewind button, the latter having a lip situated on one side of said extension to be engaged thereby when said multiple-exposure button is actuated while freeing said rewind button for depression independently of said multiple-exposure button.
References Cited (Backward Citations)
DE1951940A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |