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US3913115A
Expired / Lapsed
US
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Film perforation sensor
Assignee: OSAWA SEIMITSU KOGYO (OSAWA PRECISION INDUSTRIES LTD) KK
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Filing: 1974-05-28
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Granted: 1975-10-14
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Expires: 1994-05-28
Abstract
Abstract A film perforation sensor assembly is provided for determining the extent of film movement as film is advanced following an exposure to locate a new film frame in the exposure aperture of an automatically operated, electrically powered still camera accepting a film cartridge containing film having a single perforation proximate each film frame. To improve the sensitivity of the sensor assembly, a movement multiplier is provided to control actuation of a motor energizing circuit so that film is advanced a predetermined length.
Inventors
- 👤 Arthur C Mueller
- 👤 Jr Mervin W Larue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:31
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/42
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
227 words
For a still camera having a built-in motor for driving on demand a transport mechanism for moving a film having a perforation proximate each film frame, a shutter operating means and a control system for accorately positioning the film repeatably according to the position of the perforation relative to an exposure aperture, the control system comprising a perforation sensing assembly including: perforation sensor means displaceable into and out of engagement with perforations in the film; and multiplier means coupled to said sensor means to amplify the movement of said sensor means into and out of a perforation in the film; circuit means for controlling energization of the motor; contact means in said circuit means for selectively energizing and de-energizing said motor control circuit means responsive to displacement of said perforation sensing assembly into and out of perforatiOns in the film; and the shutter operating means being movable into and out of operative engagement with said perforation sensing assembly, said shutter operating means when moved into operative engagement with said perforation sensing assembly causing withdrawal of said sensor means from a perforation and causing initiation of motor energization through said contact in said circuit means whereby said motor when energized causes transportation of a length of film until said sensor means senses presence of another perforation at a desired location and through said circuit means de-energizes said motor.
Claim 2
Dependent Claim
227 words
For a still camera having a built-in motor for driving on demand a transport mechanism for moving a film having a perforation proximate each film frame, a shutter operating means and a control system for accorately positioning the film repeatably according to the position of the perforation relative to an exposure aperture, the control system comprising a perforation sensing assembly including: perforation sensor means displaceable into and out of engagement with perforations in the film; and multiplier means coupled to said sensor means to amplify the movement of said sensor means into and out of a perforation in the film; circuit means for controlling energization of the motor; contact means in said circuit means for selectively energizing and de-energizing said motor control circuit means responsive to displacement of said perforation sensing assembly into and out of perforatiOns in the film; and the shutter operating means being movable into and out of operative engagement with said perforation sensing assembly, said shutter operating means when moved into operative engagement with said perforation sensing assembly causing withdrawal of said sensor means from a perforation and causing initiation of motor energization through said contact in said circuit means whereby said motor when energized causes transportation of a length of film until said sensor means senses presence of another perforation at a desired location and through said circuit means de-energizes said motor.
Claim 3
Dependent Claim
27 words
The control system as in claim 1 wherein said multiplier means is coupled to said sensor means by a portion in continuing engagement with said sensor means.
Claim 4
Dependent Claim
46 words
The control system as in claim 1 wherein said camera includes shutter means including a displaceable member operable according to the condition of said shutter, and cooperating with said perforation sensing assembly for causing withdrawal of said sensor means at the end of an exposure sequence.
Claim 5
Dependent Claim
65 words
The control system as in claim 1 wherein said shutter operating means includes shutter control means and shutter setting means, said shutter control means being operable to initiate a shutter open condition, and said shutter setting means being operable to drive said shutter to a shutter closed condition, and to cause withdrawal of said sensor means as said shutter is moved to said closed condition.
Claim 6
Dependent Claim
18 words
The control system is in claim 1 including means biasing said sensor means toward engagement with the film.
Claim 7
Dependent Claim
25 words
The control system as in claim 1 wherein said sensor means is elongated, and including means supporting said sensor means for longitudinal and pivotal movement.
Claim 8
Dependent Claim
139 words
A film perforation sensing assembly for a multiple function camera handling perforated film displaceable intermittently along a film path, the assembly comprising: perforation sensor means displaceable into and out of engagement with the perforations in the film. means supporting said sensor means for said displacement; multiplier means for amplifying movement of said sensor means to and from a perforation of said film, said multiplier means being coupled to said sensor means in continuing engagement therewith means supporting said multiplier means for positioning responsive to displacement of said sensor means into and out of a perforation; means biasing said sensor means toward a first condition; and means of said camera operable responsive to one of the functions of said camera for causing displacement of said multiplier means for moving said sensor means against said biasing means to a second condition.
Claim 9
Dependent Claim
139 words
A film perforation sensing assembly for a multiple function camera handling perforated film displaceable intermittently along a film path, the assembly comprising: perforation sensor means displaceable into and out of engagement with the perforations in the film. means supporting said sensor means for said displacement; multiplier means for amplifying movement of said sensor means to and from a perforation of said film, said multiplier means being coupled to said sensor means in continuing engagement therewith means supporting said multiplier means for positioning responsive to displacement of said sensor means into and out of a perforation; means biasing said sensor means toward a first condition; and means of said camera operable responsive to one of the functions of said camera for causing displacement of said multiplier means for moving said sensor means against said biasing means to a second condition.
Claim 10
Dependent Claim
168 words
A motor control system for a camera having an electrically powered motor and accepting a film having a perforation proximate each film frame, the camera having a shutter and a film transport mechanism, the motor driving the film transport mechanism and a shutter setting assembly, the control system comprising: perforation sensing means including sensor means displaceable from and into a perforation of the film; means biasing said sensor means toward engagement in the perforation; and multiplier means coupled to said sensor means for movement thereby upon displacement of said sensor means from and into a film perforation; circuit means for controlling energization of the motor; and contact means arranged in said circuit means and operable by said multiplier means for selectively energizing and de-energizing said circuit means upon displacement of said sensor means from and into a film perforation whereby said motor is energizeable when said perforation sensor means is withdrawn from a perforation and is de-energized when said perforation sensor means is in engagement in a perforation.
Claim 11
Dependent Claim
168 words
A motor control system for a camera having an electrically powered motor and accepting a film having a perforation proximate each film frame, the camera having a shutter and a film transport mechanism, the motor driving the film transport mechanism and a shutter setting assembly, the control system comprising: perforation sensing means including sensor means displaceable from and into a perforation of the film; means biasing said sensor means toward engagement in the perforation; and multiplier means coupled to said sensor means for movement thereby upon displacement of said sensor means from and into a film perforation; circuit means for controlling energization of the motor; and contact means arranged in said circuit means and operable by said multiplier means for selectively energizing and de-energizing said circuit means upon displacement of said sensor means from and into a film perforation whereby said motor is energizeable when said perforation sensor means is withdrawn from a perforation and is de-energized when said perforation sensor means is in engagement in a perforation.
Claim 12
Dependent Claim
52 words
The control system as in claim 8 wherein said camera includes shutter operating means having a member displaceable according to the condition of said shutter, and said membeR cooperating with said perforation sensing means for causing withdrawal of said sensor means from a film perforation at the end of an exposure sequence.
Claim 13
Dependent Claim
33 words
The control system as in claim 8 wherein said film transport mechanism includes means driven by said motor for positively advancing film in said camera during a sequence when said motor is energized.
Claim 14
Dependent Claim
88 words
The control system as in claim 8 wherein said camera includes shutter operating means comprising: shutter control means operable to initiate shutter movement to an open condition; and shutter setting means operable to initiate shutter movement to a closed condition, said setting means including means cooperating with said perforation sensing means as said shutter reaches the closed condition for withdrawing said sensor means from the film perforation and causing energization of said motor control circuit means whereby said motor is energized until said sensor means enters another perforation.
Claim 15
Dependent Claim
35 words
The control system as in claim 11 wherein said shuter setting means of said shutter operating means is displaceable to a sensor means release condition upon initiating re-setting of said shutter for another exposure sequence.
References Cited (Backward Citations)
US3682066A
Cited
US3825939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |