Patent US3740112A successfully refreshed from Google Patents.
US3740112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple image optical device
Assignee: Individual
•
Filing: 1971-03-22
•
Granted: 1973-06-19
•
Expires: 1991-03-22
Abstract
Abstract An optical device for creating geometric patterns based upon actual viewed objects, comprising an elongated tube having a polygonal transverse cross-section. The inner walls of the tube are made reflective to create multiple reflections of light impinging through the open end, and these walls may be made transparent and color restrictive to enhance the apparent brightness and beauty of the pattern developed.
Inventors
- 👤 E Lundgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:56
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/02; G02B27/08; G02B6/00; G02B6/04; G02B6/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
102 words
A multiple image optical device for creating a view at either end comprising an open-ended elongated hollow tube, the walls of said tube being transmissive to external light in the direction perpendicular to the axis of said tube, the transverse crosssection through said tube forming a polygon, and the inner faces of the walls of said tube being reflective to internally impinging light and at least partially transparent to said external light, said view being composed of a direct view and reflected images of objects cited through the tube, and a direct view and reflected images of objects viewed through said walls.
Claim 2
Dependent Claim
102 words
A multiple image optical device for creating a view at either end comprising an open-ended elongated hollow tube, the walls of said tube being transmissive to external light in the direction perpendicular to the axis of said tube, the transverse crosssection through said tube forming a polygon, and the inner faces of the walls of said tube being reflective to internally impinging light and at least partially transparent to said external light, said view being composed of a direct view and reflected images of objects cited through the tube, and a direct view and reflected images of objects viewed through said walls.
Claim 3
Dependent Claim
73 words
A multiple image optical device as defined in claim 1, wherein an object positioned beyond one end of said tube is reflected with diminishing brightness along the inner faces of said walls, said tube having a length approximately equal to nR where R is the widest dimension of the tube cross-section and n is the number of reflections discernible by an eye when placed in proximity to the other end of said tube.
Claim 4
Dependent Claim
28 words
A multiple image optical device as defined in claim 1, wherein the width of the aperture within said tube is less than one-fourth the length of said tube.
Claim 5
Dependent Claim
28 words
A multiple image optical device as defined in claim 1, wherein said walls transmit external white light therethrough in the direction perpendicular to the axis of said tube.
Claim 6
Dependent Claim
19 words
A multiple image optical device as defined in claim 1, wherein said walls filter said external light transmitted therethrough.
Claim 7
Dependent Claim
22 words
A multiple image optical device as defined in claim 1, wherein said walls are substantially parallel to the axis of said tube.
Claim 8
Dependent Claim
15 words
A multiple image optical device as defined in claim 6, wherein the walls are rigid.
Claim 9
Dependent Claim
21 words
A multiple image optical device as defined in claim 1, wherein said walls exhibit color filtering characteristics to said external light.
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |