Patent US3707052A successfully refreshed from Google Patents.
US3707052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide viewer
Assignee: Individual
•
Filing: 1968-10-01
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Granted: 1972-12-26
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Expires: 1988-10-01
Abstract
Abstract A slide viewer with a translucent rear window as principal illuminating source and having a translucent lateral front window for diffusely illuminating the front side of a slide binder when inserted in the slide viewer.
Inventors
- 👤 Thomas C Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:52
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/02; G02B27/022; G02B27/024; G02B27/025
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
322 words
A viewing device for viewing transparencies and slides mounted in a slide binder, the binder having a window for exposing the picture of the transparency or slide on both sides, the viewing device having a housing which includes a viewing window with magnifier lens and which further includes transparency holding means for positioning the window of a mounted transparency in optical alignment with the magnifier lens, there being a viewing axis extending between window and holding means, the improvement comprising: the housing having a first portion extending along the viewing axis but having position in relation to the holding means so as to face away from the viewing window, the housing having a second portion extending also along the viewing axis, and from the holding means toward the viewing window, the housing having a third opaque portion continuing the second portion along the viewing axis toward the viewing window, and including means establishing the viewing window and mounting the viewing lens in alignment with the holding means and the picture of a slide when in the holding means, the third portion extending from the second portion, and providing opaque spacing between the magnifier lens and the second portion along the viewing axis; the first portion being at least partially translucent for passing diffused light towards the side of a transparency when in the holding means facing away from the transparency so that diffused illuminating light passes through the transparency as exposed in the slide binder window, towards the viewing window and the magnifier lens therein; the second portion of the housing being at least partially translucent but passing less light into The interior of the housing than the first portion of the housing, for illuminating a portion of the binder exposed to the interior of the housing and facing the viewing window and the magnifier lens therein, the latter illumination entering the housing at a relatively large angle to the viewing axis.
Claim 2
Dependent Claim
322 words
A viewing device for viewing transparencies and slides mounted in a slide binder, the binder having a window for exposing the picture of the transparency or slide on both sides, the viewing device having a housing which includes a viewing window with magnifier lens and which further includes transparency holding means for positioning the window of a mounted transparency in optical alignment with the magnifier lens, there being a viewing axis extending between window and holding means, the improvement comprising: the housing having a first portion extending along the viewing axis but having position in relation to the holding means so as to face away from the viewing window, the housing having a second portion extending also along the viewing axis, and from the holding means toward the viewing window, the housing having a third opaque portion continuing the second portion along the viewing axis toward the viewing window, and including means establishing the viewing window and mounting the viewing lens in alignment with the holding means and the picture of a slide when in the holding means, the third portion extending from the second portion, and providing opaque spacing between the magnifier lens and the second portion along the viewing axis; the first portion being at least partially translucent for passing diffused light towards the side of a transparency when in the holding means facing away from the transparency so that diffused illuminating light passes through the transparency as exposed in the slide binder window, towards the viewing window and the magnifier lens therein; the second portion of the housing being at least partially translucent but passing less light into The interior of the housing than the first portion of the housing, for illuminating a portion of the binder exposed to the interior of the housing and facing the viewing window and the magnifier lens therein, the latter illumination entering the housing at a relatively large angle to the viewing axis.
Claim 3
Dependent Claim
46 words
The viewer, as set forth in claim 1, the second portion of the housing including a translucent ring-shaped region adjacent the holder means for illuminating the side of the slide binder facing the viewing window and relatively remote from the viewing window and the magnifier lens.
Claim 4
Dependent Claim
39 words
The viewer, as set forth in claim 1, the second translucent portion of the housing having at least partially frustoconical configuration with the largest diameter at the vicinity of the holding means, the third portion continuing the frustoconical configuration.
Claim 5
Dependent Claim
24 words
The viewer, as set forth in claim 1, the first portion having a lens holder which includes a ring-shaped groove for receiving the lens.
Claim 6
Dependent Claim
76 words
The viewer, as set forth in claim 1, the first and second portions including translucent rings respectively adjacent opposite sides of the holding means and having essentially similar dimensions in direction of the optical axis of the magnifier lens, the first portion further including a large translucent window forming the end of the housing opposite the viewing window and being essentially symmetrical to the optical axis of the viewing window and to the magnifier lens therein.
Claim 7
Dependent Claim
169 words
A photographic transparency viewer having a housing which includes a first opaque enclosure and a second, at least partially translucent enclosure mounted to the first portion, the first enclosure including viewing window and defining a light duct towards said window for restricting light passage through the window from the interior of the housing, the light having entered the housing through the second enclosure; the second enclosure including holding means for receiving a mounted transparency in optical alignment with the window exposing part of the transparency mount to the interior of the housing, the second enclosure further having first and second portions for providing diffusing passage of light toward both sides of a mounted transparency when inserted in the holding means and as exposed to the interior of the housing whereby the effectively translucent surface area of the first portion exceeds the effectively translucent surface area of the second portion, the first portion including a translucent window in direct optical alignment with the viewing window and the inserted mounted transparency.
Claim 8
Dependent Claim
169 words
A photographic transparency viewer having a housing which includes a first opaque enclosure and a second, at least partially translucent enclosure mounted to the first portion, the first enclosure including viewing window and defining a light duct towards said window for restricting light passage through the window from the interior of the housing, the light having entered the housing through the second enclosure; the second enclosure including holding means for receiving a mounted transparency in optical alignment with the window exposing part of the transparency mount to the interior of the housing, the second enclosure further having first and second portions for providing diffusing passage of light toward both sides of a mounted transparency when inserted in the holding means and as exposed to the interior of the housing whereby the effectively translucent surface area of the first portion exceeds the effectively translucent surface area of the second portion, the first portion including a translucent window in direct optical alignment with the viewing window and the inserted mounted transparency.
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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |