US3585276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformer insulation construction comprising concentric cylinders and spacing sticks
Assignee: B S AND W WHITLEY Ltd
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Filing: 1969-11-07
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Granted: 1971-06-15
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Expires: 1989-11-07
Abstract
Abstract Transformer interwinding insulation construction which comprises a plurality of concentric spaced cylinders of insulating pressboard and a plurality of axially directed sticks arranged between each pair of adjacent cylinders for maintaining a radial spacing therebetween, integral portions of said cylinders adjacent each of the sticks forming lateral locating means for said sticks.
Inventors
- 👤 James Gilbert Beckett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:13
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/32; H01F27/322
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
73 words
In or for a transformer interwinding insulation comprising a plurality of concentric cylinders of insulating pressboard and a plurality of axially directed sticks arranged between each pair of adjacent cylinders for maintaining a radial spacing therebetween, the improvement which comprises lateral locating means for each of said sticks, said means comprising cooperating, integral portions of opposed surfaces of adjacent cylinders engaging and positively locating each said stick in relation to said integral portions.
Claim 2
Dependent Claim
73 words
In or for a transformer interwinding insulation comprising a plurality of concentric cylinders of insulating pressboard and a plurality of axially directed sticks arranged between each pair of adjacent cylinders for maintaining a radial spacing therebetween, the improvement which comprises lateral locating means for each of said sticks, said means comprising cooperating, integral portions of opposed surfaces of adjacent cylinders engaging and positively locating each said stick in relation to said integral portions.
Claim 3
Dependent Claim
20 words
The improved insulation of claim 1, wherein said locating means are constituted by longitudinal corrugations in each of said cylinders.
Claim 4
Dependent Claim
72 words
In or for a transformer, interwinding insulation which comprises a plurality of concentric spaced cylinders of insulating pressboard, said cylinders having longitudinal corrugations which are radially aligned from one cylinder to the next and a plurality of axially directed sticks positioned between said cylinders, each stick being located laterally by its interengagement with a pair of radially aligned corrugations of adjacent cylinders and serving to maintain radial spacing of said adjacent cylinders.
Claim 5
Dependent Claim
72 words
In or for a transformer, interwinding insulation which comprises a plurality of concentric spaced cylinders of insulating pressboard, said cylinders having longitudinal corrugations which are radially aligned from one cylinder to the next and a plurality of axially directed sticks positioned between said cylinders, each stick being located laterally by its interengagement with a pair of radially aligned corrugations of adjacent cylinders and serving to maintain radial spacing of said adjacent cylinders.
Claim 6
Dependent Claim
55 words
The insulation construction set forth in claim 3, wherein the corrugations of all of the cylinders are directed in the same sense relative to the axis of the cylinders and each of said sticks has one surface formed to fit within a reentrant corrugation and an opposed surface formed to fit over a projecting corrugation.
Claim 7
Dependent Claim
27 words
The insulation construction set forth in claim 4, wherein the corrugations are of V-section and the sticks are of L-shaped section having two arms of equal length.
Claim 8
Dependent Claim
20 words
The insulation construction set forth in claim 3, wherein each of said cylinders comprises at least one longitudinal scarf joint.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |