Patent USRE25648E successfully refreshed from Google Patents.
US4178707A
Expired / Lapsed
US
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Display apparatus utilizing magnetic materials
Assignee: Individual
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Filing: 1977-07-18
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Granted: 1979-12-18
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Expires: 1997-07-18
Abstract
Abstract A display apparatus of the type wherein an object is supported by magnetic force to create the illusion that the object is floating or flying. In the apparatus, the magnetic force is balanced against gravity. Magnetized material is utilized which may be alnico, ceramic, or other compound or alloy or a material such as rubber bonded barium ferrite composition, the material being magnetized through the thickness or diameter of the material. That is, the magnetic material may be in the form of a flat elongated bar or a cylindrical bar or the like. The N pole is opposite the S pole over the entire surface area of the material as distinguished from a rod or bar that is magnetized through the length with the N pole at one end and the S pole at the opposite end. A magnetic environment or field is created whereby the object to be displayed can be floated in a state of dynamic equilibrium in a stable condition over the magnetic material, the object, of course, having magnetic material within it magnetized so as to have a like pole facing or opposite a like pole of the said material. Improved action and performance is realized by the arrangement as described.
Inventors
- 👤 John V. Littlefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:28
CPC Classifications
G; G09; G09F; G09F19/00; G09F19/12; Y; Y10; Y10S; Y10S428/00; Y10S428/90
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
145 words
A display apparatus for maintaining an object in an apparently unsupported position, the apparatus including a sheet-like body of magnetic material having a continuous flat surface area, the material being magnetized in such a way that the entire surface area is of the same polarity, an object being magnetized in a region of less lateral extent than said area and adapted to be maintained in a position spaced from said surface, said object being polarized such as to be acted on by repulsive magnetic force of said material and gravity, means including a tether attached to said object for restraining it, the tether having a position in relation to the dimensions of said piece of material that the object is normally held in a stabilized position whereby if the object is displaced laterally with respect to said surface it will return to said stable position.
Claim 2
Dependent Claim
145 words
A display apparatus for maintaining an object in an apparently unsupported position, the apparatus including a sheet-like body of magnetic material having a continuous flat surface area, the material being magnetized in such a way that the entire surface area is of the same polarity, an object being magnetized in a region of less lateral extent than said area and adapted to be maintained in a position spaced from said surface, said object being polarized such as to be acted on by repulsive magnetic force of said material and gravity, means including a tether attached to said object for restraining it, the tether having a position in relation to the dimensions of said piece of material that the object is normally held in a stabilized position whereby if the object is displaced laterally with respect to said surface it will return to said stable position.
Claim 3
Dependent Claim
29 words
Apparatus as in claim 1, wherein the object embodies a magnet having a pole positioned so that repulsive magnetic forces act between the object and said piece of material.
Claim 4
Dependent Claim
33 words
Apparatus as in claim 1, wherein said piece of material is juxtaposed against a paramagnetic metal surface and the said object is held in a floating position spaced from said piece of material.
Claim 5
Dependent Claim
29 words
Apparatus as in claim 3 wherein said piece of material is juxtaposed against a vertical paramagnetic metal surface, the said object being suspended from above the piece of material.
Claim 6
Dependent Claim
46 words
Apparatus as in claim 2 wherein the said object has embodied in it a piece of magnetic material having a surface area magnetized so that it has an entire surface area of a single unitary polarity opposed to the surface polarity of the first mentioned material.
Claim 7
Dependent Claim
145 words
A display apparatus for maintaining an object in an apparently unsupported position, the apparatus including a flat piece of magnetic material having a continuous surface area, the material being magnetized in such a way that the entire surface area is of the same polarity, an object adapted to be maintained in a position spaced from said surface in a position creating the illusion of floating, said object being such as to be acted on by repulsive magnetic force of said material, and gravity, said object embodying magnetic means having poles of less lateral extent than said surface and arranged to provide for repulsive magnetic force between the object and the said material whereby to keep the object in a stable floating position and restraining means whereby only a magnetic pole of like polarity of said object can be brought into proximity to said surface area.
Claim 8
Dependent Claim
145 words
A display apparatus for maintaining an object in an apparently unsupported position, the apparatus including a flat piece of magnetic material having a continuous surface area, the material being magnetized in such a way that the entire surface area is of the same polarity, an object adapted to be maintained in a position spaced from said surface in a position creating the illusion of floating, said object being such as to be acted on by repulsive magnetic force of said material, and gravity, said object embodying magnetic means having poles of less lateral extent than said surface and arranged to provide for repulsive magnetic force between the object and the said material whereby to keep the object in a stable floating position and restraining means whereby only a magnetic pole of like polarity of said object can be brought into proximity to said surface area.
Claim 9
Dependent Claim
19 words
Apparatus as in claim 6 including a tether attached to the object whereby it is held in suspended position.
Claim 10
Dependent Claim
32 words
Apparatus as in claim 7 including means for moving said piece of magnetic material in a manner whereby the repulsive magnetic force is varied so as to impart motion to the object.
Claim 11
Dependent Claim
35 words
Apparatus as in claim 8 including a plurality of said pieces of magnetic material having spaces between them, the moving means being constructed to move the pieces of magnetic material and spaces beneath the object.
Claim 12
Dependent Claim
16 words
Apparatus as in claim 9 including means for moving the said pieces of magnetic material circularly.
Claim 13
Dependent Claim
27 words
Apparatus as in claim 10 including a plurality of said objects having tethers holding them in spaced angular positions with respect to the pieces of magnetic material.
Claim 14
Dependent Claim
19 words
Apparatus as in claim 9 including means for reciprocating the said pieces of magnetic material linearly beneath the object.
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) | 1982-12-17 | 1983-06-18 | 1983-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-17 | 1987-06-18 | 1987-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-17 | 1991-06-18 | 1991-12-18 | $7700.00 | Window Closed / Lapsed |