US5237165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-turn coil structures and methods of winding same
Assignee: Individual
•
Filing: 1991-04-05
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Granted: 1993-08-17
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Expires: 2011-04-05
Abstract
Abstract A multi-turn coil structure is wound on a former starting from a central portion of the coil and spirally winding respective lengths of the coil which extend from the central portion around the former in opposite winding directions and in adjacent contiguous planes. This allows outer end portions of the respective windings which constitute input and output leads for the coil each to be accommodated within the bi-planar coil structure. This reduces the overall thickness of the coil compared with conventional structures in which an inner end of the coil structure is extended to the outside in a further contiguous plane adjacent the coil. The structure is particularly suited for miniature wire coils to be used in electronic circuits of security cards.
Inventors
- 👤 Loyal H. Tingley, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:38
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/2208; H01Q1/2216; G; G06; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06K19/077; G06K19/07749; G06K19/07773; G06K19/07777; G06K19/07779; G06K19/07781; G06K19/07783; G06K19/07784; H01Q21/00; H01Q21/29; H01Q7/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
77 words
A multi-turn coil structure comprising a single length of wire wound into a pair of planar spiral windings located in adjacent planes, the windings having inner end portions merging together at a point on the wire and spiralling outwardly from the inner end portions in opposite senses respectively, the windings further having outer end portions forming input and output lead elements for the coil, said outer end portions being located in the planes of the respective windings.
Claim 2
Dependent Claim
77 words
A multi-turn coil structure comprising a single length of wire wound into a pair of planar spiral windings located in adjacent planes, the windings having inner end portions merging together at a point on the wire and spiralling outwardly from the inner end portions in opposite senses respectively, the windings further having outer end portions forming input and output lead elements for the coil, said outer end portions being located in the planes of the respective windings.
Claim 3
Dependent Claim
12 words
A structure as defined in claim 1 wherein said planes are contiguous.
Claim 4
Dependent Claim
19 words
A structure as defined in claim 1 wherein the windings ar adhesively bonded to maintain the integrity of coil.
Claim 5
Dependent Claim
29 words
A structure as defined in claim 1 wherein the coil is coated with an insulating material activated to adhesively bond the windings and maintain the integrity of the coil.
Claim 6
Dependent Claim
24 words
A structure as defined in claim 1 wherein the coil is a miniature coil for use in an electronic circuit of a smart card.
Claim 7
Dependent Claim
150 words
In an electronic smart card having a core element of laminated plastic sheets and front and back plastic sheets laminated to opposite surfaces of the core element, one of said plastic sheets of the core element provided with a printed circuit and the other of said plastic sheets of the core element defining a cut-out receiving a miniature wire coil having input and output leads connected to terminals of the printed circuit, the improvement wherein said coil comprises a single length of wire wound into adjacent planar spiral windings in contiguous planes with inner end portions merging together at a point on the wire and spiralling outwardly from the inner end portions in opposite senses respectively, the windings having outer end portions defining the respective input and output leads being located in plane with the respective windings, the coil having an overall thickness of substantially two times the wire diameter.
Claim 8
Dependent Claim
150 words
In an electronic smart card having a core element of laminated plastic sheets and front and back plastic sheets laminated to opposite surfaces of the core element, one of said plastic sheets of the core element provided with a printed circuit and the other of said plastic sheets of the core element defining a cut-out receiving a miniature wire coil having input and output leads connected to terminals of the printed circuit, the improvement wherein said coil comprises a single length of wire wound into adjacent planar spiral windings in contiguous planes with inner end portions merging together at a point on the wire and spiralling outwardly from the inner end portions in opposite senses respectively, the windings having outer end portions defining the respective input and output leads being located in plane with the respective windings, the coil having an overall thickness of substantially two times the wire diameter.
Claim 9
Dependent Claim
17 words
The improvement of claim 6 wherein the windings are adhesively bonded to maintain the integrity of coil.
Claim 10
Dependent Claim
17 words
The improvement of claim 6 wherein the input and output leads are soldered to the respective terminals.
Claim 11
Dependent Claim
87 words
An element of sheet material having an electronic circuit printed thereon, the circuit including a pair of connectors and the element including a miniature wire coil substantially flat on the sheet with input and output leads electrically connected to said connectors, the coil comprising a single length of wire wound into contiguous planar oppositely wound spiral windings with inner end portions merging together at a point on the wire and outer end portions defining the input and output leads extending from the planes of the respective windings.
Claim 12
Dependent Claim
87 words
An element of sheet material having an electronic circuit printed thereon, the circuit including a pair of connectors and the element including a miniature wire coil substantially flat on the sheet with input and output leads electrically connected to said connectors, the coil comprising a single length of wire wound into contiguous planar oppositely wound spiral windings with inner end portions merging together at a point on the wire and outer end portions defining the input and output leads extending from the planes of the respective windings.
Claim 13
Dependent Claim
19 words
An element as defined in claim 9 having a further sheet laminated thereto with a cut-out receiving the coil.
Claim 14
Dependent Claim
17 words
An element as defined in claim 10 which comprises a core element for an electronic smart card.
Claim 15
Dependent Claim
68 words
A portable smart card having an electronic circuit embedded therein including a miniature wire coil comprising a single wire wound into a pair of contiguous oppositely wound planar spiral windings with inner end portions merging together at a point on the wire and outer end portions defining input and output leads extending from the planes of the respective windings and electrically connected to respective connectors of the circuit.
Claim 16
Dependent Claim
68 words
A portable smart card having an electronic circuit embedded therein including a miniature wire coil comprising a single wire wound into a pair of contiguous oppositely wound planar spiral windings with inner end portions merging together at a point on the wire and outer end portions defining input and output leads extending from the planes of the respective windings and electrically connected to respective connectors of the circuit.
Claim 17
Dependent Claim
33 words
A card as defined in claim 12 wherein the circuit is printed on one layer of a laminated core element of the card which includes another layer having a cut-out receiving the coil.
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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) | 1996-08-16 | 1997-02-15 | 1997-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-16 | 2001-02-15 | 2001-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-16 | 2005-02-15 | 2005-08-17 | $7700.00 | Window Closed / Lapsed |