US3907418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frame shifting device for a reader-printer for a microfilm
Assignee: Ricoh Co Ltd
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Filing: 1974-03-04
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Granted: 1975-09-23
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Expires: 1994-03-04
Abstract
Abstract A device comprising a mechanism for automatically rotating an image rotating prism conjointly with the movement of a movable reflector adapted to move between a first position in which a picture of the microfilm frame containing desired information is projected on a screen and a second position in which the picture of the frame is duplicated on a photosensitive sheet, and means for rendering the prism rotating mechanism operative or inoperative depending on whether the major axis of the frame containing desired information of the microfilm is disposed vertically or transversely. Thus, the device enables the desired frame of the microfilm to be automatically changed from a position in which the major axis of the frame is disposed vertically to a position in which the major axis is disposed transversely or vice versa for enlargement and duplication of the desired information in the frame.
Inventors
- 👤 Susumu Okuyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:13
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/26; G03B; G03B21/00; G03B21/10; G03B21/11; G03B21/118
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
400 words
A reader-printer for microfilm frames having a screen for viewing a selected frame projected thereon and a device for copying a selected frame projected thereon, said copying device having a copying plane, comprising: means for forming a light image of a selected microfilm frame and for projecting said image along a first optical axis; a first reflector disposed on said first optical axis and reflecting the image projected along the first axis onto the copying plane of the copying device along a second optical axis; a second reflector movable between a copying position in which it does not intersect said second optical axis and allows the light image to be projected from the first reflector onto the copying plane of the copying device and a viewing position in which said second reflector is in the path of the second optical axis and reflects the image projected therealong by the first reflector onto the viewing screen for viewing thereof; first selector means manually movable between a viewing position and a copying position; means responsive to moving the first selector means to the viewing position thereof to place said second reflector in the viewing position thereof and responsive to moving the first selector means to the copying position thereof to place the second reflector in the copying position thereof; an image rotating prism disposed on said first optical path and movable between a first position to cause a defined edge of the selected frame to be along a horizontal direction of the viewing screen when projected thereon and along a horizontal direction of the copying plane when projected thereon and a second position to cause said defined edge of the frame to be along a vertical direction of the viewing screen when projected thereon and along a vertical direction of the copying plane when projected thereon; and means responsive to moving the first selector means to its copying position for placing the image rotating prism to a selected one of its first and second position regardless of the position of the image rotating prism during viewing of the selected microfilm frame, whereby an elongated microfilm frame may be viewed on the screen with its long dimension either horizontal or vertical, but is always copied with its long dimension in a selected direction with respect to the copying device so that the same width copying paper may be used for all microfilm frames.
Claim 2
Dependent Claim
400 words
A reader-printer for microfilm frames having a screen for viewing a selected frame projected thereon and a device for copying a selected frame projected thereon, said copying device having a copying plane, comprising: means for forming a light image of a selected microfilm frame and for projecting said image along a first optical axis; a first reflector disposed on said first optical axis and reflecting the image projected along the first axis onto the copying plane of the copying device along a second optical axis; a second reflector movable between a copying position in which it does not intersect said second optical axis and allows the light image to be projected from the first reflector onto the copying plane of the copying device and a viewing position in which said second reflector is in the path of the second optical axis and reflects the image projected therealong by the first reflector onto the viewing screen for viewing thereof; first selector means manually movable between a viewing position and a copying position; means responsive to moving the first selector means to the viewing position thereof to place said second reflector in the viewing position thereof and responsive to moving the first selector means to the copying position thereof to place the second reflector in the copying position thereof; an image rotating prism disposed on said first optical path and movable between a first position to cause a defined edge of the selected frame to be along a horizontal direction of the viewing screen when projected thereon and along a horizontal direction of the copying plane when projected thereon and a second position to cause said defined edge of the frame to be along a vertical direction of the viewing screen when projected thereon and along a vertical direction of the copying plane when projected thereon; and means responsive to moving the first selector means to its copying position for placing the image rotating prism to a selected one of its first and second position regardless of the position of the image rotating prism during viewing of the selected microfilm frame, whereby an elongated microfilm frame may be viewed on the screen with its long dimension either horizontal or vertical, but is always copied with its long dimension in a selected direction with respect to the copying device so that the same width copying paper may be used for all microfilm frames.
Claim 3
Dependent Claim
327 words
A frame shifting device for a reader-printer for a microfilm comprising a moVable reflector adapted to move between a first position in which it reflects a light beam emanating from a light source for projecting a picture of the frame containing desired information of the microfilm upon a screen for observation and a second position in which it is out of the path of travel of the light beam to permit the light beam to be incident on a photosensitive sheet to expose the latter to an optical image of the desired information contained in the frame, and an image rotating prism capable of being rotated and disposed in the path of travel of said light beam so as to change the image of the frame containing desired information from a position in which its major axis is disposed vertically to a position in which its major axis is disposed transversely or vice versa when the enlarged frame is projected upon the screen, said frame shifting device comprising an image rotating prism rotating mechanism coupled to a mechanism for moving said movable reflector from said first position to said second position and automatically rotating said image rotating prism, and means for rendering said image rotating prism rotating mechanism operative or inoperative depending on whether the major axis of the desired frame is disposed horizontally or vertically, wherein said image rotating prism rotating mechanism comprises a first arm adapted to move in the same direction said movable reflector when the latter moves from its first position to its second position, a pivotal arm maintained in engagement with said first arm and adapted to move in pivotal movement when said first arm moves, a first gear connected to said pivotal arm and adapted to rotate as said pivotal arm moves in pivotal movement, and a second gear maintained in meshing engagement with said first gear for rotating a bodytube housing therein a projection lens and said image rotating prism.
Claim 4
Dependent Claim
327 words
A frame shifting device for a reader-printer for a microfilm comprising a moVable reflector adapted to move between a first position in which it reflects a light beam emanating from a light source for projecting a picture of the frame containing desired information of the microfilm upon a screen for observation and a second position in which it is out of the path of travel of the light beam to permit the light beam to be incident on a photosensitive sheet to expose the latter to an optical image of the desired information contained in the frame, and an image rotating prism capable of being rotated and disposed in the path of travel of said light beam so as to change the image of the frame containing desired information from a position in which its major axis is disposed vertically to a position in which its major axis is disposed transversely or vice versa when the enlarged frame is projected upon the screen, said frame shifting device comprising an image rotating prism rotating mechanism coupled to a mechanism for moving said movable reflector from said first position to said second position and automatically rotating said image rotating prism, and means for rendering said image rotating prism rotating mechanism operative or inoperative depending on whether the major axis of the desired frame is disposed horizontally or vertically, wherein said image rotating prism rotating mechanism comprises a first arm adapted to move in the same direction said movable reflector when the latter moves from its first position to its second position, a pivotal arm maintained in engagement with said first arm and adapted to move in pivotal movement when said first arm moves, a first gear connected to said pivotal arm and adapted to rotate as said pivotal arm moves in pivotal movement, and a second gear maintained in meshing engagement with said first gear for rotating a bodytube housing therein a projection lens and said image rotating prism.
Claim 5
Dependent Claim
338 words
A frame shifting device for a reader-printer for a microfilm comprising a movable reflector adapted to move between a first position in which it reflects a light beam emanating from a light source for projecting a picture of the frame containing desired information of the microfilm upon a screen for observation and a second position in which it is out of the path of travel of the light beam to permit the light beam to be incident on a photosensitive sheet to expose the latter to an optical image of the desired information contained in the frame, and an image rotating prism capable of being rotated and disposed in the path of travel of said light beam so as to change the image of the frame containing desired information from a position in which its major axis is disposed vertically to a position in which its major axis is disposed transversely or vice versa when the enlarged frame is projected upon the screen, said frame shifting device comprising an image rotating prism rotating mechanism coupled to a mechanism for moving said movable reflector from said first position to said second position and automatically rotating said image rotating prism, and means for rendering said image rotating prism rotating mechanism operative or inoperative depending on whether the major axis of the desired frame is disposed horizontally or vertically, wherein said means for rendering said image rotating prism rotating mechanism operative or inoperative comprises a vertical projection formed in an arm adapted to move in the same direction as said movable reflector and adapted to move onto and out of the path of travel of said movable reflector from its first position to its second position, a vertical projection formed in a channel-shaped slider to which said arm is affixed, a cam adapted to move said channel-shaped slider upwardly and downwardly between two positions, and an image rotating change-over knob for moving said cam according to the direction in which the major axis of the frame containing desired information is disposed.
Claim 6
Dependent Claim
338 words
A frame shifting device for a reader-printer for a microfilm comprising a movable reflector adapted to move between a first position in which it reflects a light beam emanating from a light source for projecting a picture of the frame containing desired information of the microfilm upon a screen for observation and a second position in which it is out of the path of travel of the light beam to permit the light beam to be incident on a photosensitive sheet to expose the latter to an optical image of the desired information contained in the frame, and an image rotating prism capable of being rotated and disposed in the path of travel of said light beam so as to change the image of the frame containing desired information from a position in which its major axis is disposed vertically to a position in which its major axis is disposed transversely or vice versa when the enlarged frame is projected upon the screen, said frame shifting device comprising an image rotating prism rotating mechanism coupled to a mechanism for moving said movable reflector from said first position to said second position and automatically rotating said image rotating prism, and means for rendering said image rotating prism rotating mechanism operative or inoperative depending on whether the major axis of the desired frame is disposed horizontally or vertically, wherein said means for rendering said image rotating prism rotating mechanism operative or inoperative comprises a vertical projection formed in an arm adapted to move in the same direction as said movable reflector and adapted to move onto and out of the path of travel of said movable reflector from its first position to its second position, a vertical projection formed in a channel-shaped slider to which said arm is affixed, a cam adapted to move said channel-shaped slider upwardly and downwardly between two positions, and an image rotating change-over knob for moving said cam according to the direction in which the major axis of the frame containing desired information is disposed.
Claim 7
Dependent Claim
33 words
A frame shifting device according to claim 3 wherein said channel-shaped slider is adapted to move in sliding mOvement on a guide rail disposed in the direction of movement of said movable reflector.
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 |