Patent US3880194A successfully refreshed from Google Patents.
US3880194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical insulators
Assignee: General Electric Co
•
Filing: 1973-02-20
•
Granted: 1975-04-29
•
Expires: 1993-02-20
Abstract
Abstract Electrical insulators are formed from insulative strip material by providing a substantially continuous ultrasonically welded seam. In one embodiment a tubular insulator for covering stator winding connections is formed by continuously moving the strip and a strip of dissimilar material about a cylindrical former having its axis in generally the same direction as the direction of elongation and motion of the strips to thereby form a multiple layer sleeve with a seam being ultrasonically formed to include the two edges of the strip of polyester material.
Inventors
- 👤 Walter P Mcneal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:01
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/08; B29C53/00; B29C53/36; B29C53/38; B29C53/382; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4322; B29C66/49; B29C66/70; B29C66/72; B29C66/723; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/81; B29C66/812; B29C66/8126; B29C66/81264; B29C66/814; B29C66/8141; B29C66/81427; H; H01; H01B; H01B19/00; H02; H02K; H02K15/00; H02K3/00; H02K3/32; H02K3/38; B29C66/71; B29C66/83; B29C66/832; B29K; B29K2995/00; B29K2995/0037; B29K2995/007; B29L; B29L2009/00; B29L2031/00; B29L2031/34; B29L2031/3412; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1036; Y10T156/1038; Y10T156/1052
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
129 words
A generally tubular multi-layer electrical insulator for accommodating electrically connected portions of at least two electrical conductors comprising a dielectric sleeve having first and second wall areas which are at least three layers thick, said first and second wall areas being separated by two other wall areas which are at least two layers thick and at least one less layer thick than the number of layers in the first and second wall areas, whereby a dielectric insulator is formed having a minimum of three layers of thickness along the second wall area and establishing a major portion of the circumferential extent of the insulator to better resist puncture by connected portions of electrical conductors, said sleeve having a longitudinally extending ultrasonically welded continuous seam along the first wall area.
Claim 2
Dependent Claim
129 words
A generally tubular multi-layer electrical insulator for accommodating electrically connected portions of at least two electrical conductors comprising a dielectric sleeve having first and second wall areas which are at least three layers thick, said first and second wall areas being separated by two other wall areas which are at least two layers thick and at least one less layer thick than the number of layers in the first and second wall areas, whereby a dielectric insulator is formed having a minimum of three layers of thickness along the second wall area and establishing a major portion of the circumferential extent of the insulator to better resist puncture by connected portions of electrical conductors, said sleeve having a longitudinally extending ultrasonically welded continuous seam along the first wall area.
Claim 3
Dependent Claim
20 words
The insulator of claim 1 wherein the layers in the first wall area of the sleeve are thermally bonded together.
Claim 4
Dependent Claim
43 words
The insulator of claim 1 wherein the outer and inner layers in the second wall area of the insulator are of a first given insulating material and the middle layer is of a given insulating material different than the first given insulating material.
Claim 5
Dependent Claim
34 words
The insulator of claim 3 wherein the first wall area of the insulator has all three layers formed of the frist given insulating material and the interfaces of the three layers are bonded together.
Claim 6
Dependent Claim
35 words
The insulator of claim 4 wherein the first given insulating material comprises a single sheet of polyethylene terephthalate and the middle layer of insulating material comprises a single sheet of material other than polyethylene terephthalate.
Claim 7
Dependent Claim
132 words
A fabricated electrical insulator for accommodating electrically connected portions of at least two electrical conductors formed from at least one sheet of dielectric material and having at least one portion thereof defined by at least three layers of dielectric material; said at least one sheet being rolled upon itself into a tubular configuration so that the at least three layers of the sheet material are superposed, one upon another; said at least three layers being bonded together along the interfaces thereof along a longitudinally extending ultrasonically welded continuous seam; said tubular configuration electrical insulator including a second piece of insulating material sandwiched between two layers of said sheet material and extending continuously from one side of the ultrasonically welded seam around the insulator to the other side of the ultrasonically welded seam.
Claim 8
Dependent Claim
132 words
A fabricated electrical insulator for accommodating electrically connected portions of at least two electrical conductors formed from at least one sheet of dielectric material and having at least one portion thereof defined by at least three layers of dielectric material; said at least one sheet being rolled upon itself into a tubular configuration so that the at least three layers of the sheet material are superposed, one upon another; said at least three layers being bonded together along the interfaces thereof along a longitudinally extending ultrasonically welded continuous seam; said tubular configuration electrical insulator including a second piece of insulating material sandwiched between two layers of said sheet material and extending continuously from one side of the ultrasonically welded seam around the insulator to the other side of the ultrasonically welded seam.
References Cited (Backward Citations)
US2176109A
Cited
US2260064A
Cited
US2408253A
Cited
US2761525A
Cited
US3071214A
Cited
US3312250A
Cited
US3440118A
Cited
US3629489A
Cited
US3575623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |