US4273418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mirror for producing optical illusions
Assignee: Mattel Inc
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Filing: 1979-11-30
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Granted: 1981-06-16
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Expires: 1999-11-30
Abstract
Abstract Apparatus for creating optical illusions utilizing a rotating circular disc having alternating transparent and reflective areas according to a predetermined pattern. The reflective area is approximately equal to the transparent area. As the disc rotates at a user's selected speed the user perceives alternating reflected and transmitted images. Thus where the apparatus is positioned between an object and the user the transmitted image of the object is superimposed upon the reflected image of the user and consequently the two images merge to form the desired optical illusion.
Inventors
- 👤 Richard L. Gillespie
- 👤 Douglas A. Geller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:27
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/02; G02B27/08
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
91 words
A viewing apparatus comprising: a housing having a central opening; reflective means mounted in the central opening of the housing, said reflective means having transparent areas and reflective areas disposed over the surface thereof according to a predetermined pattern; means for rotatably supporting the reflective means at the periphery thereof in the central opening; and p1 drive means located in the housing linked to the supporting means for causing said reflective means to rotate at a selectable speed whereby an unobstructed view of both sides of the reflective means is provided.
Claim 2
Dependent Claim
91 words
A viewing apparatus comprising: a housing having a central opening; reflective means mounted in the central opening of the housing, said reflective means having transparent areas and reflective areas disposed over the surface thereof according to a predetermined pattern; means for rotatably supporting the reflective means at the periphery thereof in the central opening; and p1 drive means located in the housing linked to the supporting means for causing said reflective means to rotate at a selectable speed whereby an unobstructed view of both sides of the reflective means is provided.
Claim 3
Dependent Claim
35 words
The apparatus of claim 1 in which the housing comprises a base, an upright support projecting from the base and a ring-shaped structure positioned upon the top of the upright support defining the central opening.
Claim 4
Dependent Claim
17 words
The apparatus of claim 2 in which the ring-shaped structure provides alignment means for the reflective means.
Claim 5
Dependent Claim
49 words
The apparatus of claim 3 wherein the means for rotatably supporting the reflective means comprises a plurality of guides within the ring-shaped structure located at predetermined intervals around the periphery of the reflective means to provide means for maintaining the alignment of the reflective means with the ring-shaped structure.
Claim 6
Dependent Claim
26 words
The apparatus of claim 1 wherein the reflective means comprises a circular disc with a plurality alternating transparent and reflective areas disposed over the surface thereof.
Claim 7
Dependent Claim
29 words
The apparatus of claim 1 wherein the reflective means comprises a circular disc having alternating transparent and reflective circular sectors; the sectors having a central angle of approximately 90°.
Claim 8
Dependent Claim
29 words
The apparatus of claim 1 wherein the reflective means comprises a circular disc having alternating transparent and reflective circular sectors; the sectors having a central angle of approximately 60°.
Claim 9
Dependent Claim
29 words
The apparatus of claim 1 wherein the reflective means comprises a circular disc having alternating transparent and reflective circular sectors; the sectors having a central angle of approximately 180°.
Claim 10
Dependent Claim
56 words
The apparatus of claim 1 wherein the reflective means comprises a circular disc with a plurality of concentric circular fields, each field containing a plurality of alternating reflective and transparent areas, said areas being defined by a series of evenly spaced radii of said disc and the inner and outer circumferences of the respective circular fields.
Claim 11
Dependent Claim
28 words
The apparatus of claim 1 wherein the reflective means comprises a reflective circular disc having a plurality of circular transparent areas disposed over the surface of the disc.
Claim 12
Dependent Claim
28 words
The apparatus of claim 1 wherein the reflective means comprises a transparent circular disc having a plurality of reflective circular areas disposed over the surface of the disc.
Claim 13
Independent Claim
30 words
The apparatus of claims 1, 5, 6, 7, 8, 9, 10 or 11 wherein the reflective means is a transparent disc having metalized reflective areas disposed over the surface thereof.
Claim 14
Independent Claim
42 words
The apparatus of claims 1, 5, 6, 7, 8, 9 or 10 wherein the reflective means is a reflective disc having openings corresponding to the transparent areas, said openings being disposed over the surface of the disc according to the predetermined pattern.
Claim 15
Dependent Claim
26 words
The apparatus of claim 1 wherein the total surface area of the reflective areas and the total surface area of the transparent areas is approximately equal.
Claim 16
Dependent Claim
15 words
The apparatus of claim 1 wherein the drive means is comprised of an electric motor.
Claim 17
Dependent Claim
35 words
The apparatus of claim 15 wherein the electric motor means causes the reflective means to rotate about its central axis by frictionally coupling the motor drive shaft to the outer periphery of the reflective means.
Claim 18
Dependent Claim
34 words
The apparatus of claim 15 additionally comprising a speed controlling rheostat wherein the rheostat can be adjusted to control the speed of the motor by adjusting the flow of current from a current source.
Claim 19
Dependent Claim
23 words
The apparatus of claim 17 wherein the source of electrical current is supplied by dry cell batteries which are contained within the housing.
Claim 20
Dependent Claim
18 words
The apparatus of claim 17 wherein the source of electrical current is supplied externally via alternating line current.
Claim 21
Dependent Claim
25 words
The apparatus of claim 19 additionally comprising a transformer means and rectifier means to provide direct current of the proper voltage to the motor means.
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) | 1984-06-15 | 1984-12-15 | 1985-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-15 | 1988-12-15 | 1989-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-15 | 1992-12-15 | 1993-06-16 | $7700.00 | Window Closed / Lapsed |