Patent US2452344A successfully refreshed from Google Patents.
Patent US4307528A successfully refreshed from Google Patents.
US4307528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating display
Assignee: Trans World Marketing Corp
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Filing: 1980-06-04
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Granted: 1981-12-29
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Expires: 2000-06-04
Abstract
Abstract A rotating display which gives the illusion of simultaneous movement in both the clockwise and counterclockwise directions is disclosed. The rotary display inclues a rotary reflector having a plurality of light reflecting surfaces formed thereon. Each of the light reflecting surfaces is planar and lies in a plane different from each of the reflecting surfaces located adjacent thereto. Means for rotating the reflector about a predetermined axis is provided. A reflective diffraction grating surrounds the reflector and reflects light emitted from a light source onto the reflector and out towards the observer of the display.
Inventors
- 👤 John G. Dewees
- 👤 George N. Morgese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:46
CPC Classifications
G; G09; G09F; G09F13/00; G09F13/34; F; F21; F21S; F21S10/00; F21S10/06; F21V; F21V7/00; F21V7/22; F21V7/24; F21V7/28; Y; Y10; Y10S; Y10S362/00; Y10S362/806; Y10S362/811
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
121 words
A rotary display, comprising: a rotary reflector having a plurality of light reflecting surfaces formed thereon, each of said surfaces being planar and lying in a different plane from each of the reflecting surfaces located adjacent thereto: means for rotating said rotary reflector about a predetermined axis; a reflective diffraction grating surrounding said rotary reflector; and a light source located at a position which will cause light emitting from said light source to reflect off of said diffraction grating as colored light and thereafter to impinge onto the reflecting surfaces of said rotary reflector whereby said display provides the illusion that when said reflector is rotating in a first direction, said colored light appears to rotate in a second opposite direction.
Claim 2
Dependent Claim
121 words
A rotary display, comprising: a rotary reflector having a plurality of light reflecting surfaces formed thereon, each of said surfaces being planar and lying in a different plane from each of the reflecting surfaces located adjacent thereto: means for rotating said rotary reflector about a predetermined axis; a reflective diffraction grating surrounding said rotary reflector; and a light source located at a position which will cause light emitting from said light source to reflect off of said diffraction grating as colored light and thereafter to impinge onto the reflecting surfaces of said rotary reflector whereby said display provides the illusion that when said reflector is rotating in a first direction, said colored light appears to rotate in a second opposite direction.
Claim 3
Dependent Claim
17 words
A rotary display according to claim 1, wherein said reflecting surfaces are symmetrically spaced about said axis.
Claim 4
Dependent Claim
24 words
A rotary display according to claim 2, wherein said rotary reflector is formed in the general shape of a cone having curved side surfaces.
Claim 5
Dependent Claim
26 words
A rotary display according to claims 1, 2 or 3, wherein each of said reflective surfaces has a square shape as viewed in its respective plane.
Claim 6
Dependent Claim
20 words
A rotary display according to claims 1, 2 or 3, wherein said diffraction grating is coaxial with said predetermined axis.
Claim 7
Dependent Claim
32 words
A rotary display according to claims 1, 2 or 3, wherein said diffraction grating breaks up the light emitted by said light source into substantially all the colors of the visible spectrum.
Claim 8
Dependent Claim
38 words
A rotary display according to claim 6, wherein said diffraction grating is formed in the general shape of a truncated cone and wherein the axis of said cone is coaxial with said axis about which said reflector rotates.
Claim 9
Dependent Claim
24 words
A rotary display according to claim 1, further including a message bearing surface formed on said display and bearing a message to be conveyed.
Claim 10
Dependent Claim
30 words
A rotary display according to claims 1, 2 or 3, wherein said rotary display further includes a housing supporting said rotary reflector, said rotating means and said reflective diffraction grating.
Claim 11
Dependent Claim
18 words
A rotary display according to claim 9, wherein said housing includes a transparent cover on the face thereof.
Claim 12
Dependent Claim
27 words
A rotary display according to claim 10, further including a message bearing surface formed in said cover, said message bearing surface bearing a message to be conveyed.
Claim 13
Dependent Claim
22 words
A rotary display according to claim 11, wherein said light source is located between said message bearing surface and said rotary display.
Claim 14
Dependent Claim
22 words
A rotary display according to claim 11, wherein said message is formed on a banner removably coupled to said message bearing surface.
Claim 15
Dependent Claim
44 words
A rotary display according to claim 9, wherein said light emitted by said light source, reflected off said diffraction grating and onto said reflecting surfaces of said rotary reflector is reflected off said rotary display and out of said housing through said transparent cover.
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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) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |