US3632197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viewing method and means
Assignee: Boeing North American Inc
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Filing: 1969-08-11
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Granted: 1972-01-04
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Expires: 1989-08-11
Abstract
Abstract A microfilm projector is mounted over a draftsman''s worktable by a fixed overhead support and adapted to receive microfilmed data such as technical reports. The projected and enlarged image of each separate page of data is cast onto the worktable surface at a location convenient for viewing, comparing, and/or copying by the draftsman.
Inventors
- 👤 Thomas M Shelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:29
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/14; B43L13/16; B43L13/18; G; G03; G03B; G03B21/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
194 words
Apparatus for projecting an enlarged image of microfilm on a worktable surface, comprising: a source of intense illumination, a housing over said source, aperture means in said housing including an opening for directing some of said intense illumination in a generally downward direction, a focusing means aligned with said opening and spaced apart therefrom, an angular bracket member having two leg portions with said housing attached to one of said leg portions of said bracket and said focusing means attached to the other of said leg portions of said bracket, said other leg portion being below and spaced apart from said housing aperture means and having an aperture for the transmission of illumination downwardly from said housing aperture means through said focusing means, support means comprising a member releasably pivotally connecting said bracket member to said worktable at the edge thereof and adapted to support said bracket member, housing and focusing in means in spaced relationship with and generally vertically above said worktable surface whereby said microfilm may be positioned on said other leg portion between said housing aperture means and said focusing means to project an enlarged image directly on the worktable surface.
Claim 2
Dependent Claim
194 words
Apparatus for projecting an enlarged image of microfilm on a worktable surface, comprising: a source of intense illumination, a housing over said source, aperture means in said housing including an opening for directing some of said intense illumination in a generally downward direction, a focusing means aligned with said opening and spaced apart therefrom, an angular bracket member having two leg portions with said housing attached to one of said leg portions of said bracket and said focusing means attached to the other of said leg portions of said bracket, said other leg portion being below and spaced apart from said housing aperture means and having an aperture for the transmission of illumination downwardly from said housing aperture means through said focusing means, support means comprising a member releasably pivotally connecting said bracket member to said worktable at the edge thereof and adapted to support said bracket member, housing and focusing in means in spaced relationship with and generally vertically above said worktable surface whereby said microfilm may be positioned on said other leg portion between said housing aperture means and said focusing means to project an enlarged image directly on the worktable surface.
Claim 3
Dependent Claim
24 words
The aperture set forth in claim 1 above, further including: cooling fan means secured to said housing for circulating cooling air through said housing.
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |