US3745394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical insulators for slotted magnetic cores
Assignee: General Electric Co
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Filing: 1971-12-07
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Granted: 1973-07-10
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Expires: 1991-12-07
Abstract
Abstract Electrical insulators, for example, slot liners, are produced from an elongated continuous strip of dielectric material in the slots of a magnetic core. Individual pieces of dielectric strip material having different preselected sizes and desired configurations are then produced; and may have laterally extending portions and an intermediate axially extending bight portion at one end thereby permitting shorter coils to be used in the magnetic core while also allowing the coils to take a gradual bend adjacent the core, next to the bight portion, which tends to prevent damage to the coils.
Inventors
- 👤 L Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:56
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/32; H02K3/34; H02K3/345; H02K15/00; H02K15/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
A slot insulator for insulating a slot wall and a portion of at least one end face of a magnetic core having axially extending slots terminating in edges at end faces from a coil of electrically conductive wire carried in a slot, comprising: a piece of electrically insulating strip material of a sufficient size to line the slot walls and to extend beyond at least one end face of the magnetic core, at least one edge of the piece being turned outwardly thereby forming laterally extending portions adapted to lie flat against at least one end face of the magnetic core, and an intermediate portion between said laterally extending portions extending in an axial direction beyond the laterally extending portions, and curved connector portions integrally joining the laterally extending portions and the intermediate portion to form a continuous surface whereby a section of the coil adjacent the edges of the slot is caused to take a gradual bend.
Claim 2
Dependent Claim
158 words
A slot insulator for insulating a slot wall and a portion of at least one end face of a magnetic core having axially extending slots terminating in edges at end faces from a coil of electrically conductive wire carried in a slot, comprising: a piece of electrically insulating strip material of a sufficient size to line the slot walls and to extend beyond at least one end face of the magnetic core, at least one edge of the piece being turned outwardly thereby forming laterally extending portions adapted to lie flat against at least one end face of the magnetic core, and an intermediate portion between said laterally extending portions extending in an axial direction beyond the laterally extending portions, and curved connector portions integrally joining the laterally extending portions and the intermediate portion to form a continuous surface whereby a section of the coil adjacent the edges of the slot is caused to take a gradual bend.
Claim 3
Dependent Claim
212 words
An arrangement of a magnetic core having a plurality of slots therein extending between a pair of end faces, and slot insulators for insulating walls of slots in the core, the arrangement including: a plurality of slot insulators each comprising a piece of electrically insulating material disposed in a slot of the core; at least one of the pieces of electrically insulating material being preselected to line the walls of a predetermined one of the core slots and to extend beyond at least one end face of the magnetic core; at least one edge of said at least one of the pieces of electrically insulating material being turned outwardly thereby to form laterally extending portions adapted to lie flat against the at least one end face of the magnetic core; said at least one of the pieces of electrically insulating material including an intermediate portion between said laterally extending portions extending in an axial direction beyond the laterally extending portions, and curved connector portions integrally joining the laterally extending portions and the intermediate portion to form a continuous surface whereby a section of a coil, adjacent the edges of the core slot in which the at least one piece of electrically insulating material is disposed, is caused to take a gradual bend.
Claim 4
Dependent Claim
212 words
An arrangement of a magnetic core having a plurality of slots therein extending between a pair of end faces, and slot insulators for insulating walls of slots in the core, the arrangement including: a plurality of slot insulators each comprising a piece of electrically insulating material disposed in a slot of the core; at least one of the pieces of electrically insulating material being preselected to line the walls of a predetermined one of the core slots and to extend beyond at least one end face of the magnetic core; at least one edge of said at least one of the pieces of electrically insulating material being turned outwardly thereby to form laterally extending portions adapted to lie flat against the at least one end face of the magnetic core; said at least one of the pieces of electrically insulating material including an intermediate portion between said laterally extending portions extending in an axial direction beyond the laterally extending portions, and curved connector portions integrally joining the laterally extending portions and the intermediate portion to form a continuous surface whereby a section of a coil, adjacent the edges of the core slot in which the at least one piece of electrically insulating material is disposed, is caused to take a gradual bend.
Claim 5
Dependent Claim
41 words
The arrangement of claim 2 wherein at least two of the slot insulators are differently configured, with each of said at least two of the slot insulators being configured to fit in a core slot of a predetermined size and shape.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |