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US3706922A
Expired / Lapsed
US
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Linear comb-shaped synchronous motor
Assignee: Toshiba Corp
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Filing: 1971-06-08
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Granted: 1972-12-19
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Expires: 1991-06-08
Abstract
Abstract A linear comb-shaped synchronous motor includes a tubular-shaped reaction rail, an excitation conductor extending through said tubular shaped reaction rail, and a moving member containing an armature. The tubular shaped reaction rail has at least one zigzag slit along the longitudinal direction thereof and each side of the reaction rail is provided with comb-shaped pole members. As current flows through the excitation conductor, the comb-shaped pole members are magnetized such that the comb-shaped pole members aligned along one side of the zigzag slit make a trail of south poles and the comb-shaped pole members aligned along the other side of the zigzag slit make a train of north poles. The moving member is placed near the reaction rail through an air gap between the armature and the pole members, and the same is driven along the reaction rail.
Inventors
- 👤 Junpei Inagaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:36
CPC Classifications
B; B60; B60L; B60L13/00; B60L13/03; H; H02; H02K; H02K41/00; H02K41/02; H02K41/03; B60L2200/00; B60L2200/26; B60L2220/00; B60L2220/10; B60L2220/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
219 words
A linear comb-shaped synchronous motor comprising: an elongated reaction rail having a tubular cross-section and made of a magnetic material, said rail being provided with one zigzag slit along the longitudinal direction thereof; first comb-shaped electromagnetic pole members provided at one edge portion of said rail adjacent to said zigzag slit of the rail; second comb-shaped electromagnetic pole members provided at the other edge portion of said rail adjacent to said zigzag slit of the rail, each of said second comb-shaped electromagnetic pole members being respectively disposed between adjacent electromagnetic pole members of said first comb-shaped electromagnetic pole members without directly contacting said first comb-shaped electromagnetic pole members; one excitation conductor extending through said tubular type reaction rail for receiving a D.C. excitation current such that one group of said first or second comb-shaped electromagnetic pole members is magnetized so as to make a train of north poles and the other group is magnetized so as to make a train of south poles, and, an armature structure having a polyphase winding wound thereon for receiving an A.C. excitation, said armature structure being mounted on a moving member so as to be successively faced to the functional surface of said first and second comb-shaped electromagnetic pole members through an air gap as the moving member moves along the reaction rail.
Claim 2
Dependent Claim
219 words
A linear comb-shaped synchronous motor comprising: an elongated reaction rail having a tubular cross-section and made of a magnetic material, said rail being provided with one zigzag slit along the longitudinal direction thereof; first comb-shaped electromagnetic pole members provided at one edge portion of said rail adjacent to said zigzag slit of the rail; second comb-shaped electromagnetic pole members provided at the other edge portion of said rail adjacent to said zigzag slit of the rail, each of said second comb-shaped electromagnetic pole members being respectively disposed between adjacent electromagnetic pole members of said first comb-shaped electromagnetic pole members without directly contacting said first comb-shaped electromagnetic pole members; one excitation conductor extending through said tubular type reaction rail for receiving a D.C. excitation current such that one group of said first or second comb-shaped electromagnetic pole members is magnetized so as to make a train of north poles and the other group is magnetized so as to make a train of south poles, and, an armature structure having a polyphase winding wound thereon for receiving an A.C. excitation, said armature structure being mounted on a moving member so as to be successively faced to the functional surface of said first and second comb-shaped electromagnetic pole members through an air gap as the moving member moves along the reaction rail.
Claim 3
Dependent Claim
26 words
A linear comb-shaped synchronous motor according to claim 1, wherein: said reaction rail has a circular cross section, and said armature has a curved functional surface.
Claim 4
Dependent Claim
29 words
A linear comb-shaped synchronous motor according to claim 1, wherein: said reaction rail has a rectangular cross section and comb-shaped pole members located along at least one plane thereof.
Claim 5
Dependent Claim
63 words
A linear comb-shaped synchronous motor according to claim 1, wherein: said reaction rail is divided into a plurality of seCtions in the lengthwise direction thereof, each of said sections including respective excitation means and wherein separate switching means are combined with each of said excitation means such that the excitation means are separately operated in response to the existence of said moving member.
Claim 6
Dependent Claim
45 words
A linear comb-shaped synchronous motor according to claim 1, wherein: a pair of reaction rails are located in parallel, and wherein excitation conductors respectively extend through said rails and are connected to each other to form a current loop which includes a D.C. supply therein.
Claim 7
Dependent Claim
19 words
A linear comb-shaped synchronous motor according to claim 1, wherein: said moving member is located within said reaction rail.
Claim 8
Dependent Claim
23 words
A linear comb-shaped synchronous motor according to claim 1, wherein: said reaction rail is shaped to form a saddle for said moving member.
Claim 9
Dependent Claim
20 words
A linear comb-shaped synchronous motor according to claim 1, wherein: said at least one excitation conductor is a sodium wire.
Claim 10
Dependent Claim
21 words
A linear comb-shaped synchronous motor according to claim 1, wherein: said at least one excitation conductor is a super conductive wire.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |