US3907417A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled projection reader
Assignee: JM Huber Corp
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Filing: 1975-02-10
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Granted: 1975-09-23
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Expires: 1995-02-10
Abstract
Abstract A controlled projection reader is disclosed in which film having indicia thereon is passed by an aperture area. A lamp and lens arrangement projects the indicia on the film onto a screen or the like. A scanning disc is mounted relative to the aperture area so as to be rotatably driven relative to the film and aperture area. Means on the disc permits scanning or line-type reading to occur. A masking disc is mounted for relative movement relative to the scanning disc to permit either scan-type operation or full line projection. The film is looped toward the scanning disc to reduce the distance between the aperture mask, image plane on the film and the scanning disc so as to project a clear border line on the screen. Means for advancing the film in response to rotational movement of the scanning device is provided.
Inventors
- 👤 Joerg Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:22
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/56; G03B9/00; G03B9/08; G03B9/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
299 words
In a projection system of the type in which a film is held stationary or moved step by step across a projecting system which includes an optical system comprising a light source and a lens, the film being disposed between the source and the lens, a novel multi-condition field-defining device comprising: a scanning disc having a first set of light passages so formed and located that when the scanning disc is continuously rotated and the film advanced a field of view is displayed by scanning, said scanning disc being formed with a second plurality of light passages located and formed that when the scanning disc is stationary and the second set are exposed a steady field of view is projected as the film is held stationary, a motor for driving the scanning device, a mask adapted to be angularly positioned either to expose or to mask the second set of passages, means for normally biasing the mask so that said second formations are masked when the scanning disc rotates, a multi-position switch adapted to order ''''scan,'''' and ''''line'''' and ''''hold'''' conditions of operation, control means for turning the motor on and off, arresting means for holding the scanning disc, and bias-overcoming means for moving thE mask relative to the scanning disc so as to expose said second set of passages, said switch including means for actuating the control means so that the motor is on for the scan condition and off for the others, said switch further including means for actuating the arresting means so that the scanning disc rotates for the scan condition and is stationary for the others, the last-mentioned means moving the mask so that the mask causes the second set of passages to be closed for the scanning operation and open for the line operation.
Claim 2
Dependent Claim
299 words
In a projection system of the type in which a film is held stationary or moved step by step across a projecting system which includes an optical system comprising a light source and a lens, the film being disposed between the source and the lens, a novel multi-condition field-defining device comprising: a scanning disc having a first set of light passages so formed and located that when the scanning disc is continuously rotated and the film advanced a field of view is displayed by scanning, said scanning disc being formed with a second plurality of light passages located and formed that when the scanning disc is stationary and the second set are exposed a steady field of view is projected as the film is held stationary, a motor for driving the scanning device, a mask adapted to be angularly positioned either to expose or to mask the second set of passages, means for normally biasing the mask so that said second formations are masked when the scanning disc rotates, a multi-position switch adapted to order ''''scan,'''' and ''''line'''' and ''''hold'''' conditions of operation, control means for turning the motor on and off, arresting means for holding the scanning disc, and bias-overcoming means for moving thE mask relative to the scanning disc so as to expose said second set of passages, said switch including means for actuating the control means so that the motor is on for the scan condition and off for the others, said switch further including means for actuating the arresting means so that the scanning disc rotates for the scan condition and is stationary for the others, the last-mentioned means moving the mask so that the mask causes the second set of passages to be closed for the scanning operation and open for the line operation.
Claim 3
Dependent Claim
173 words
In a controlled projection reader of the type comprising a light source, a lens, film-positioning means for positioning the film between said source and said lens, an aperture located between said film and said light source, a multi-purpose field defining device comprising: a scanning disc rotatably mounted and positioned so that a margin thereof traverses, in superimposed fashion, the aperture, said disc being formed with two sets of light passages for permitting projection of the film image therethrough to the lens system, one of said sets defining one type of field as the disc is rotated and the film advanced and the other of said sets defining another type of field as the disc and the film are stationary, a mask for closing one of said sets of passages, means for opening the mask when the disc is rotating so that said one type of field is defined by scanning, and means for closing the mask when the disc and field are stationary so that the other field is defined by line projection.
Claim 4
Dependent Claim
173 words
In a controlled projection reader of the type comprising a light source, a lens, film-positioning means for positioning the film between said source and said lens, an aperture located between said film and said light source, a multi-purpose field defining device comprising: a scanning disc rotatably mounted and positioned so that a margin thereof traverses, in superimposed fashion, the aperture, said disc being formed with two sets of light passages for permitting projection of the film image therethrough to the lens system, one of said sets defining one type of field as the disc is rotated and the film advanced and the other of said sets defining another type of field as the disc and the film are stationary, a mask for closing one of said sets of passages, means for opening the mask when the disc is rotating so that said one type of field is defined by scanning, and means for closing the mask when the disc and field are stationary so that the other field is defined by line projection.
Claim 5
Dependent Claim
53 words
In a reader the combination as set forth in claim 2 in which each of the first passages of said scanning disc is spiral in shape, the second passages being windows communicating with said first passages, and in which said mask is a disc having ears which are normally superimposed over said windows.
Claim 6
Dependent Claim
55 words
In a reader the combination as set forth in claim 3 in which said scanning disc is formed with limiting slots therein, said masking ring being formed with projecting flaps which protrude through said limiting apertures, the cooperative engagement of said flaps and said limiting slots arresting the ears so that the windows are exposed.
Claim 7
Dependent Claim
44 words
In a reader the combination as set forth in claim 4 and a cam member, said scanning disc being fixedly mounted on said cam member and said masking disc being rotatably secured to said scanning disc, and a motor for driving the cam member.
Claim 8
Dependent Claim
81 words
In a reader, the combination as set forth in claim 5 in which said cam comprises a camming surface terminating in a slot, and mask-control means including a lever pivotally supported, one end of said lever having a projecting lug in close proximity with said camming surface when the cam is rotated for scan operation, said lug being held out of engagement with said camming surface wherein said window passages of said scanning device are covered by said masking ring ears.
Claim 9
Dependent Claim
85 words
In a reader, the combination as set forth in claim 6, the mask-control further including biasing means for urging the lug into engagement with said camming surface when the cam is ordered to stop so that continued rotational movement of said cam by said motor will cause said lug to enter said slot to finally rest in said slot, said lug simultaneously engaging one of said flaps to prevent further rotation thereof, final rotation movement of said scanning disc causing said windows to be opened.
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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |