US3903532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microfiche camera
Assignee: Schneider Optics Inc
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Filing: 1973-09-27
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Granted: 1975-09-02
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Expires: 1993-09-27
Abstract
Abstract A table-top microfiche camera with a document platen on the top surface, a lens, shutter, film holder, an x-y slide system for moving the film holder to make exposures in a predetermined sequence on a piece of film, and an inner light-tight wall including a flexible bellows for sealing against the film pack during its x-y movements. The lens is mounted for movement in a lens mount and includes a format mask that moves temporarily into light-sealing contact with the film immediately prior to each exposure for holding the film flat to provide image accuracy and to minimize distortion, and for locating the film in perfect focus. The film pack includes a notch that registers with the lens for insertion into and removal from the film holder only when the film holder is in position such that the first row of frames of the film in the film pack is in line with the lens.
Inventors
- 👤 Paul W Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:40
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/46; G03B27/47
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
228 words
In a microfilm camera including a film holder for holding a sheet of film and a lens mounted in a lens mount for exposing said film, the improvement wherein said lens includes a format mask with a flat surface at the end thereof adjacent said film holder, means for holding said lens in a first position with said surface spaced away from any film in said film holder and for moving said lens and format mask towards said film a predetermined distance such that said surface contacts said film in light-tight engagement therewith, said lens includes a pair of opposed cam follower pins on opposite sides thereof, said holding and moving means including a U-shaped yoke including a pair of arms one positioned on each side of said lens mount with a cam surface on each arm, one in engagement with each of said cam follower pins, guide means for guiding said lens toward and away from said film holder, said yoke having a first position in which said lens is in said first position and a second position in which said lens is in said second position with said format mask surface in light-tight engagement with said film, said holding and moving means including spring means for holding said yoke in said first position and solenoid means for moving, when energized, said yoke into its second position.
Claim 2
Dependent Claim
228 words
In a microfilm camera including a film holder for holding a sheet of film and a lens mounted in a lens mount for exposing said film, the improvement wherein said lens includes a format mask with a flat surface at the end thereof adjacent said film holder, means for holding said lens in a first position with said surface spaced away from any film in said film holder and for moving said lens and format mask towards said film a predetermined distance such that said surface contacts said film in light-tight engagement therewith, said lens includes a pair of opposed cam follower pins on opposite sides thereof, said holding and moving means including a U-shaped yoke including a pair of arms one positioned on each side of said lens mount with a cam surface on each arm, one in engagement with each of said cam follower pins, guide means for guiding said lens toward and away from said film holder, said yoke having a first position in which said lens is in said first position and a second position in which said lens is in said second position with said format mask surface in light-tight engagement with said film, said holding and moving means including spring means for holding said yoke in said first position and solenoid means for moving, when energized, said yoke into its second position.
Claim 3
Dependent Claim
271 words
In a microfilm camera including a film holder for holding a sheet of film and a lens mounted in a lens mount for exposing said film, said lens comprising a lens system including a predetermined number of optical elements fixedly mounted in a tubular sleeve slidably mounted in said lens mount, the improvement wherein said tubular sleeve includes a format mask with a flat surface at the end thereof adjacent said film holder, means for moving said tubular sleeve back and forth between a first position in which said flat surface of said format mask is spaced away from said film in said film holder and a second position in which said flat surface of said format mask contacts said film in light-tight engagement therewith, said tubular sleeve includes a pair of opposed cam follower pins on opposite sides thereof, said moving means includes a U-shaped yoke including a pair of arms one positioned on each side of said tubular sleeve with a cam surface on each arm, one in engagement with each of said cam follower pins, guide means for guiding said tubular sleeve in toward and away from said film holder, said yoke having a first position in which said tubular sleeve is in said first position and a second position in which said tubular sleeve is in said second position, said moving means including a first spring for holding said yoke in said first position and a solenoid having a longitudinally movable actuating pin positioned for movement in a direction perpendicular to the movement of said tubular sleeve, for moving, when energized, said yoke into its second position.
Claim 4
Dependent Claim
271 words
In a microfilm camera including a film holder for holding a sheet of film and a lens mounted in a lens mount for exposing said film, said lens comprising a lens system including a predetermined number of optical elements fixedly mounted in a tubular sleeve slidably mounted in said lens mount, the improvement wherein said tubular sleeve includes a format mask with a flat surface at the end thereof adjacent said film holder, means for moving said tubular sleeve back and forth between a first position in which said flat surface of said format mask is spaced away from said film in said film holder and a second position in which said flat surface of said format mask contacts said film in light-tight engagement therewith, said tubular sleeve includes a pair of opposed cam follower pins on opposite sides thereof, said moving means includes a U-shaped yoke including a pair of arms one positioned on each side of said tubular sleeve with a cam surface on each arm, one in engagement with each of said cam follower pins, guide means for guiding said tubular sleeve in toward and away from said film holder, said yoke having a first position in which said tubular sleeve is in said first position and a second position in which said tubular sleeve is in said second position, said moving means including a first spring for holding said yoke in said first position and a solenoid having a longitudinally movable actuating pin positioned for movement in a direction perpendicular to the movement of said tubular sleeve, for moving, when energized, said yoke into its second position.
Claim 5
Dependent Claim
49 words
THe apparatus according to claim 2 including a second spring continuously urging said tubular sleeve toward its second position, said solenoid operating, when energized, against said first spring and moving said yoke to its second position allowing said first spring to move said tubular sleeve to its second position.
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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |