US3733121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microfiche reader
Assignee: Seaco Computer Display Inc
•
Filing: 1969-12-15
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Granted: 1973-05-15
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Expires: 1989-12-15
Abstract
Abstract A reader for viewing enlarged images of selected portions of a flat film microfiche. The film is sandwiched between flat transparent plates of a holder, which is easily slidable in a carriage to bring a selected micro image into the optical projection path, positioning being facilitated by a guide in the table on which the carriage moves. To ensure precise focussing, the lens unit rides on and is supported by the upper plate of the film holder. When the holder is pulled forward the upper plate automatically rises to allow removal or replacement of the film. The illumination source and a portion of the optics are disposed within a removable drawer translatably positioned in the reader housing.
Inventors
- 👤 L Smitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:22
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11; G03B21/115
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
164 words
A reader for viewing selected frames of a microfiche film, comprising: upper housing means containing a viewing screen on a forward side thereof and means for directing an image to said screen, base housing means disposed below said upper housing means, said base housing means having a light transmitting aperture disposed in a top portion thereof, projection lens means disposed below said upper housing means and in alignment with said aperture, removable drawer means translatably mounted within said base housing, said removable drawer means having a condenser lens, illumination source, and reflector means mounted thereon, said reflector means reflecting light from said illumination source upwardly through said condenser lens, stop means to limit the translation of said removable drawer within said base housing to a position whereby said condenser lens is accurately aligned with said aperture, and electrical contact means associated with said base housing for engaging electrical contact means associated with said removable drawer means which are electrically connected to said illumination source.
Claim 2
Dependent Claim
164 words
A reader for viewing selected frames of a microfiche film, comprising: upper housing means containing a viewing screen on a forward side thereof and means for directing an image to said screen, base housing means disposed below said upper housing means, said base housing means having a light transmitting aperture disposed in a top portion thereof, projection lens means disposed below said upper housing means and in alignment with said aperture, removable drawer means translatably mounted within said base housing, said removable drawer means having a condenser lens, illumination source, and reflector means mounted thereon, said reflector means reflecting light from said illumination source upwardly through said condenser lens, stop means to limit the translation of said removable drawer within said base housing to a position whereby said condenser lens is accurately aligned with said aperture, and electrical contact means associated with said base housing for engaging electrical contact means associated with said removable drawer means which are electrically connected to said illumination source.
Claim 3
Dependent Claim
172 words
A reader for viewing selected frames of a microfiche film, comprising: upper housing means containing a viewing screen on a forward side thereof and means for directing an image to said screen, base housing means disposed below said upper housing means, said base housing means having a light transmitting aperture displosed in a top portion thereof, projection lens means disposed below said upper housing means and in alignment with said aperture, removable drawer means translatably mounted within said base housing, said removable drawer means having condenser lens, illumination source, and reflector means mounted thereon, said condenser lens and reflector means transmitting light from said illumination source upwardly through said light transmitting aperture to said projection lens, stop means to limit the translation of said removable drawer within said base housing to a position whereby said upwardly transmitted light is accurately aligned through said aperture, and electrical contact means associated with said base housing for engaging electrical contact means associated with said removable drawer means which are electrically connected to said illumination source.
Claim 4
Dependent Claim
172 words
A reader for viewing selected frames of a microfiche film, comprising: upper housing means containing a viewing screen on a forward side thereof and means for directing an image to said screen, base housing means disposed below said upper housing means, said base housing means having a light transmitting aperture displosed in a top portion thereof, projection lens means disposed below said upper housing means and in alignment with said aperture, removable drawer means translatably mounted within said base housing, said removable drawer means having condenser lens, illumination source, and reflector means mounted thereon, said condenser lens and reflector means transmitting light from said illumination source upwardly through said light transmitting aperture to said projection lens, stop means to limit the translation of said removable drawer within said base housing to a position whereby said upwardly transmitted light is accurately aligned through said aperture, and electrical contact means associated with said base housing for engaging electrical contact means associated with said removable drawer means which are electrically connected to said illumination source.
Claim 5
Dependent Claim
41 words
The reader as defined by claim 2 further including a microfiche film holder disposed intermediate said aperture and said projection lens, said film holder being mounted for to an fro and transverse movement over said top portion of said base housing.
Claim 6
Dependent Claim
59 words
The reader as defined by claim 2 wherein said film holder comprises upper and lower transparent plates between which a microfiche film can be held, said upper plate being pivotally mounted with respect to said lower plate, and means foR pivotally raising said upper plate from said lower plate as said film holder is moved in a forwardly direction.
Claim 7
Dependent Claim
54 words
The reader as defined by claim 2 including carriage frame means for supporting said film holder and having spaced parallel arms, and stop means disposed on said parallel arms, said pivotally raising means comprising a pair of levers mounted to said upper transparent plate adapted to engage said stop means on said parallel arms.
Claim 8
Dependent Claim
64 words
The reader as defined by claim 2 further including a film format chart adjacent said film holder corresponding to the format of the frames of a microfiche film within said film holder, and indicator means coupled to said film holder for indicating with respect to said format chart the identification of the frame image of the microfiche film being directed to the viewing screen.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |