US3622818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear induction motor winding
Assignee: Merlin Gerin SA
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Filing: 1969-11-25
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Granted: 1971-11-23
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Expires: 1989-11-25
Abstract
Abstract Linear induction motor having a slotted magnetic field structure wound with a multiphase winding having legs which extend in the slots. The legs are disposed in at least two layers in the slots and interconnected by pairs in each layer whereby all slots contain the same number of layers. The magnetic field structure is subdivided into units of double-pole pitch length which are electrically independent and not cross-connected.
Inventors
- 👤 Jean Pol Payen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:27
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/025; B; B65; B65G; B65G54/00; B65G54/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
127 words
A linear induction motor, comprising: at least one electrically and magnetically independent double-pole pitch magnetic field unit, said unit having a longitudinally extending pole surface including a plurality of regularly spaced-apart parallelly extending transversal winding slots; a multilayer winding comprising a plurality of coils; each said coil having a pair of coil sides extending in different slots in the same layer and electrically series connected by cross-conducting means; all slots, including the end slots of said pole surface, carrying the same number of coil sides; the cross-conducting means; all coil sides accommodated in a given slot extending to the same side of said given slot whereby the coils associated with each layer produce, when polyphase energized, a magnetic field traveling linearly along said pole surface longitudinally thereof.
Claim 2
Dependent Claim
127 words
A linear induction motor, comprising: at least one electrically and magnetically independent double-pole pitch magnetic field unit, said unit having a longitudinally extending pole surface including a plurality of regularly spaced-apart parallelly extending transversal winding slots; a multilayer winding comprising a plurality of coils; each said coil having a pair of coil sides extending in different slots in the same layer and electrically series connected by cross-conducting means; all slots, including the end slots of said pole surface, carrying the same number of coil sides; the cross-conducting means; all coil sides accommodated in a given slot extending to the same side of said given slot whereby the coils associated with each layer produce, when polyphase energized, a magnetic field traveling linearly along said pole surface longitudinally thereof.
Claim 3
Dependent Claim
80 words
A linear induction motor as defined in claim 13, further comprising: A plurality of longitudinally spaced-apart double-pole pitch magnetic field units having colinearly aligned pole faces; further comprising armature support means positioned in the spaces between said units; an elongated armature supported upon said support means; an airgap between said pole faces and a confronting coextensive portion of said armature; said support means and said units forming a unitary assembly, said armature being longitudinally movable with respect to said assembly.
Claim 4
Dependent Claim
21 words
A linear induction motor according to claim 14 further comprising means pivotally connecting said units, said armature having a curvilinear portion.
Claim 5
Dependent Claim
28 words
A linear induction motor according to claim 14, wherein two of said unitary assemblies are disposed in surface-to-surface facing relationship to each other with said armature disposed therebetween.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |