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US3662689A Expired / Lapsed US ⏱️ 0.0 years remaining

High speed train utilizing hard superconductor

Assignee: Hitachi Ltd
•
Filing: 1970-07-10
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Granted: 1972-05-16
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Expires: 1990-07-10
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Abstract

Abstract Superconducting high speed train system comprising a rail including at least one elongated hard superconducting member disposed horizontally along the running direction of the train and having a hollow or gap portion extending in the elongated direction, and a train body including a superconducting magnet for generating a magnetic field perpendicular to the hard superconducting member, thereby floating the body from the rail by the magnetic force acting between the superconducting magnet and the hard superconducting member.

Inventors

  • 👤 Ushio Kawabe
  • 👤 Hiroshi Kimura
  • 👤 Toshio Doi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 07:58
CPC Classifications
B; B60; B60L; B60L13/00; B60L13/10; B60L13/04; B60V; B60V3/00; B60V3/02; B60V3/04; B60L2200/00; B60L2200/26

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 136 words
A superconducting high speed train system comprising: train rail means including at least a pair of inhomogeneous hard superconducting plates disposed along the running direction of a train, vertically facing to one another, and means for cooling said superconducting plates to keep them in the superconducting state; a body of a train accommodating thereon a superconducting field coil, means for operating said coil to generate a magnetic field perpendicular to the surface of said hard superconductor plates and means for cooling said coil to keep the same in the superconducting state, whereby floating the train body by the interaction of the magnetic field established by said superconducting coil means and the weak magnetic field formed in the gap of said pair of hard superconductor plates; and means for driving said train body in the floated state.
Claim 2
Dependent Claim 136 words
A superconducting high speed train system comprising: train rail means including at least a pair of inhomogeneous hard superconducting plates disposed along the running direction of a train, vertically facing to one another, and means for cooling said superconducting plates to keep them in the superconducting state; a body of a train accommodating thereon a superconducting field coil, means for operating said coil to generate a magnetic field perpendicular to the surface of said hard superconductor plates and means for cooling said coil to keep the same in the superconducting state, whereby floating the train body by the interaction of the magnetic field established by said superconducting coil means and the weak magnetic field formed in the gap of said pair of hard superconductor plates; and means for driving said train body in the floated state.
Claim 3
Dependent Claim 180 words
A superconducting high speed train system comprising: train rail means including at least a pair of inhomogeneous hard superconductor plates disposed in vertically facing relation to each other along the running direction of a train, means for cooling said superconductor plates to keep them in the superconducting state, and ladder-shaped circuit means for allowing a current to flow perpendicularly to the running direction of the train; a body of a train including superconducting coil means for generating a magnetic field perpendicular to the surfaces of said hard superconductor plates and said ladder-shaped circuit, and means for cooling said coil means to keep the same in the superconducting state, whereby floating the train by the interaction of the magnetic field generated by said superconducting coil means and the weak magnetic field formed in the gap of said pair of hard superconductor plates; and means for controlling the current flowing through the ladder-shaped circuit means whereby propelling the train by the force caused by the magnetic field generated by said superconducting coil means and the current flowing through said ladder-shaped circuit means.
Claim 4
Dependent Claim 180 words
A superconducting high speed train system comprising: train rail means including at least a pair of inhomogeneous hard superconductor plates disposed in vertically facing relation to each other along the running direction of a train, means for cooling said superconductor plates to keep them in the superconducting state, and ladder-shaped circuit means for allowing a current to flow perpendicularly to the running direction of the train; a body of a train including superconducting coil means for generating a magnetic field perpendicular to the surfaces of said hard superconductor plates and said ladder-shaped circuit, and means for cooling said coil means to keep the same in the superconducting state, whereby floating the train by the interaction of the magnetic field generated by said superconducting coil means and the weak magnetic field formed in the gap of said pair of hard superconductor plates; and means for controlling the current flowing through the ladder-shaped circuit means whereby propelling the train by the force caused by the magnetic field generated by said superconducting coil means and the current flowing through said ladder-shaped circuit means.
Claim 5
Dependent Claim 63 words
A superconducting high speed train system according to claim 2, in which said ladder-shaped circuit means includes a number of ladder-shaped unit circuits, each having an appropriate length and said control means includes switch means provided to the respective unit circuits for controlling the magnitude and the direction of the flow of current, thereby controlling the starting, braking or speed of the train.
Claim 6
Dependent Claim 235 words
A superconducting high speed train system comprising: train rail means including two pairs of inhomogeneous hard superconductor plates disposed in horizontally and vertically facing relation to one another along the running direction of a train, means for cooling said superconductor plates to keep them in the superconducting state, and ladder-shaped circuit means for allowing current to flow perpendicularly to the running direction of the train; a body of a train including first superconducting coil means for generating a magnetic field perpendicularly to the surfaces of a pair of said hard superconductor plates facing verticAlly and said ladder-shaped circuit means, second superconducting coil means for generating a magnetic field perpendicularly to the surface of another pair of said hard superconductor plates facing horizontally, whereby the train is floated by the interaction of the magnetic field generated by said first superconducting coil and the weak magnetic field in the gap of said pair of hard superconductor plates facing vertically, and controlled the position thereof by the interaction of the magnetic field generated by said second superconducting coil and the weak magnetic field formed in the gap of said another pair of hard superconductor plates facing horizontally; and means for controlling the current flowing through said ladder-shaped circuit means whereby the train is propelled by the force caused by the magnetic field generated by said first superconducting coil means and the current flowing through said ladder-shaped circuit means.
Claim 7
Dependent Claim 235 words
A superconducting high speed train system comprising: train rail means including two pairs of inhomogeneous hard superconductor plates disposed in horizontally and vertically facing relation to one another along the running direction of a train, means for cooling said superconductor plates to keep them in the superconducting state, and ladder-shaped circuit means for allowing current to flow perpendicularly to the running direction of the train; a body of a train including first superconducting coil means for generating a magnetic field perpendicularly to the surfaces of a pair of said hard superconductor plates facing verticAlly and said ladder-shaped circuit means, second superconducting coil means for generating a magnetic field perpendicularly to the surface of another pair of said hard superconductor plates facing horizontally, whereby the train is floated by the interaction of the magnetic field generated by said first superconducting coil and the weak magnetic field in the gap of said pair of hard superconductor plates facing vertically, and controlled the position thereof by the interaction of the magnetic field generated by said second superconducting coil and the weak magnetic field formed in the gap of said another pair of hard superconductor plates facing horizontally; and means for controlling the current flowing through said ladder-shaped circuit means whereby the train is propelled by the force caused by the magnetic field generated by said first superconducting coil means and the current flowing through said ladder-shaped circuit means.

References Cited (Backward Citations)

US3470828A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-05-16 1975-11-15 1976-05-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-05-16 1979-11-15 1980-05-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-05-16 1983-11-15 1984-05-16 $7700.00 Window Closed / Lapsed

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