Cryogenic vessel for a superconducting apparatus

Claim 2

A cryogenic vessel for superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical outer vessel surrounding said inner vessel and providing a vacuum-insulating space between said vessels for thermal insulation; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said outer vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe and the radial clearance being in communication with the vacuum-insulating space; and a rupture-type safety valve disposed at one of the ends of said connecting pipe.

Claim 3

A cryogenic vessel as claimed in claim 1 further comprising cooling means for cooling said connecting pipe by continually passing gas which has formed by the vaporization of said cryogenic mixture along the surface of said connecting pipe.

Claim 4

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said connecting pipe; and said cooling means including; a cylindrical inner pipe disposed inside said connecting pipe with a radial clearance therebetween and extending for substantially the entire length of said connecting pipe; a spiral-shaped member wound around and projecting from said inner pipe to contact the outer surface of said inner pipe and the inner surface of said connecting pipe along the entire length of said spiral-shaped member, thereby forming a spiral-shaped gas flow passageway between said inner pipe and said connecting pipe, said gas flow passageway opening into the inside of said inner vessel at its inner end and into the outside of said vacuum insulating vessel at its outer end; and a plurality of disk-shaped dividing plates having substantially the same diameter as the inner diameter of said inner pipe, said dividing plates being disposed inside said inner pipe so as to divide the inside of said inner pipe into a plurality of small compartments, each of said dividing plates being made of a material having a low thermal conductivity, said rupture-type safety valve being installed on one of the ends of said inner pipe so as to seal said end of said inner pipe without obstructing said gas flow passageway.

Claim 5

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said connecting pipe; and said cooling means including; a cylindrical inner pipe disposed inside said connecting pipe with a radial clearance therebetween and extending for substantially the entire length of said connecting pipe; a spiral-shaped member wound around and projecting from said inner pipe to contact the outer surface of said inner pipe and the inner surface of said connecting pipe along the entire length of said spiral-shaped member, thereby forming a spiral-shaped gas flow passageway between said inner pipe and said connecting pipe, said gas flow passageway opening into the inside of said inner vessel at its inner end and into the outside of said vacuum insulating vessel at its outer end; and a plurality of disk-shaped dividing plates having substantially the same diameter as the inner diameter of said inner pipe, said dividing plates being disposed inside said inner pipe so as to divide the inside of said inner pipe into a plurality of small compartments, each of said dividing plates being made of a material having a low thermal conductivity, said rupture-type safety valve being installed on one of the ends of said inner pipe so as to seal said end of said inner pipe without obstructing said gas flow passageway.

Claim 6

A cryogenic vessel as claimed in claim 3, wherein each of said dividing plates has a pressure-equalizing hole formed therein.

Claim 7

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said connecting pipe; and said cooling means comprising: a rod extending into said connecting pipe for substantially the entire length of said connecting pipe and supported by the outer end of said connecting pipe; a plurality of disk-shaped dividing plates secured to said rod, each of said dividing plates being made of a material with a low thermal conductivity, the diameter of each of said dividing plates being smaller than the inner diameter of said connecting pipe so that a gas flow passageway is formed between the outer surfaces of said dividing plates and the inner surface of said connecting pipe.

Claim 8

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said connecting pipe; and said cooling means comprising: a rod extending into said connecting pipe for substantially the entire length of said connecting pipe and supported by the outer end of said connecting pipe; a plurality of disk-shaped dividing plates secured to said rod, each of said dividing plates being made of a material with a low thermal conductivity, the diameter of each of said dividing plates being smaller than the inner diameter of said connecting pipe so that a gas flow passageway is formed between the outer surfaces of said dividing plates and the inner surface of said connecting pipe.

Claim 9

A cryogenic vessel as claimed in claim 5 wherein: said connecting pipe is disposed at an angle of approximately 10-20 degrees with respect to the horizontal.

Claim 10

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said connecting pipe; and said cooling means comprising: a pipe for injection of cryogenic mixture disposed inside said connecting pipe, the inner end of said pipe for injection extending into said inner vessel and the outer end of said pipe for injection extending to the outside of said connecting pipe; and a plurality of disk-shaped dividing plates mounted on said connecting pipe and dividing the inside of said connecting pipe in the longitudinal direction into a plurality of small compartments, each of said dividing plates being made of a material having a low thermal conductivity, the outer diameter of each of said dividing plates being smaller than the inner diameter of said connecting pipe so that a gas flow passageway is formed between the outer surface of said dividing plates and the inner surface of said connecting pipe.

Claim 11

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said connecting pipe; and said cooling means comprising: a pipe for injection of cryogenic mixture disposed inside said connecting pipe, the inner end of said pipe for injection extending into said inner vessel and the outer end of said pipe for injection extending to the outside of said connecting pipe; and a plurality of disk-shaped dividing plates mounted on said connecting pipe and dividing the inside of said connecting pipe in the longitudinal direction into a plurality of small compartments, each of said dividing plates being made of a material having a low thermal conductivity, the outer diameter of each of said dividing plates being smaller than the inner diameter of said connecting pipe so that a gas flow passageway is formed between the outer surface of said dividing plates and the inner surface of said connecting pipe.

Claim 12

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said connecting pipe; and a power supply lead for said superconducting winding; a rigid wiring support pipe surrounding said power supply lead and penetrating said inner vessel and said vacuum insulating vessel; and a flexible tube, the outer end of said wiring support pipe being connected to said vacuum insulating vessel by said flexible tube and the inner end of said wiring support pipe being rigifly connected to said inner vessel.

Claim 13

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said connecting pipe; and a power supply lead for said superconducting winding; a rigid wiring support pipe surrounding said power supply lead and penetrating said inner vessel and said vacuum insulating vessel; and a flexible tube, the outer end of said wiring support pipe being connected to said vacuum insulating vessel by said flexible tube and the inner end of said wiring support pipe being rigifly connected to said inner vessel.

Claim 14

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said conducting pipe; and a power supply lead for said superconducting winding; a rigid wiring support pipe surrounding and supporting said power supply lead penetrating said inner vessel and said vacuum insulating vessel; and a flexible tube, the inner end of said wiring support pipe being connected to said inner vessel by said flexible tube and the outer end of said wiring support pipe being rigidly connected to said vacuum insulating vessel.

Claim 15

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said conducting pipe; and a power supply lead for said superconducting winding; a rigid wiring support pipe surrounding and supporting said power supply lead penetrating said inner vessel and said vacuum insulating vessel; and a flexible tube, the inner end of said wiring support pipe being connected to said inner vessel by said flexible tube and the outer end of said wiring support pipe being rigidly connected to said vacuum insulating vessel.

Claim 16

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said connecting pipe; and a flexible tube connected between said dividing pipe and said inner vessel so as to enable said dividing pipe to move in its axial direction.

Claim 17

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said connecting pipe; and a flexible tube connected between said dividing pipe and said inner vessel so as to enable said dividing pipe to move in its axial direction.

Claim 18

A cryogenic vessel as claimed in claim 10 further comprising: a power supply lead for said superconducting winding: a rigid wiring support pipe surrounding said power supply lead penetrating said inner vessel and said vacuum insulating vessel; and a flexible tube, the outer end of said wiring support pipe being connected to said vacuum insulating vessel by said flexible tube and the inner end of said wiring support pipe being rigidly connected to said inner vessel.

Claim 19

A cryogenic vessel as claimed in claim 10 further comprising: a power supply lead for said superconducting winding: a rigid wiring support pipe surrounding and supporting said power supply lead penetrating said inner vessel and said vacuum insulating vessel; and a flexible tube, the inner end of said wiring support pipe being connected to said inner vessel by said flexible tube and the outer end of said wiring support pipe being rigidly connected to said vacuum insulating vessel.

Claim 20

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vaccum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulting vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said connecting pipe; and a flexible tube connected between the outer end of said connecting pipe and said vacuum insulating vessel.

Claim 21

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vaccum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulting vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said connecting pipe; and a flexible tube connected between the outer end of said connecting pipe and said vacuum insulating vessel.

Claim 22

A cryogenic vessel as claimed in claim 13 further comprising: a power supply lead for said superconducting winding: a rigid wiring support pipe surrounding said power supply lead penetrating said inner vessel and said vacuum insulating vessel; and a flexible tube, the outer end of said wiring support pipe being connected to said vacuum insulating vessel by said flexible tube and the inner end of said wiring support pipe being rigidly connected to said inner vessel.

Claim 23

A cryogenic vessel as claimed in claim 13 further comprising: a power supply lead for said superconducting winding: a rigid wiring support pipe surrounding and supporting said power supply lead penetrating said inner vessel and said vacuum insulating vessel; and a flexible tube, the inner end of said wiring support pipe being connected to said inner vessel by said flexible tube and the outer end of said wiring support pipe being rigidly connected to said vacuum insulating vessel.

Claim 24

A cryogenic vessel for a supeconducting apparatus comprising: a cylindrical inner vessel for containing a supeconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said connecting pipe; and a power supply lead for said superconducting winding dsiposed inside and supported by said connecting pipe; and a flexible tube connected between said dividing pipe and said inner vessel so as to enable said dividing pipe to move in its axial direction.

Claim 25

A cryogenic vessel for a supeconducting apparatus comprising: a cylindrical inner vessel for containing a supeconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said connecting pipe; and a power supply lead for said superconducting winding dsiposed inside and supported by said connecting pipe; and a flexible tube connected between said dividing pipe and said inner vessel so as to enable said dividing pipe to move in its axial direction.

Claim 26

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said connecting pipe; and a power supply lead for said superconducting winding disposed inside and supported by said connecting pipe; and a flexible tube connected between the outer end of said connecting pipe and said vacuum insulating vessel.

Claim 27

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; a rupture-type safety valve disposed at one of the ends of said connecting pipe; and a power supply lead for said superconducting winding disposed inside and supported by said connecting pipe; and a flexible tube connected between the outer end of said connecting pipe and said vacuum insulating vessel.

Claim 28

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; and said cooling means comprising: a rod extending into said connecting pipe for substantially the entire length of said connecting pipe and supported by the outer end of said connecting pipe; a plurality of disk-shaped dividing plates secured to said rod, each of said dividing plates being made of a material with a low thermal conductivity, the diameter of each of said dividing plates being smaller than the inner diameter of said connecting pipe so that a gas flow passageway is formed between the outer surfaces of said dividing plates and the inner surface of said connecting pipe.

Claim 29

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vacuum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; and said cooling means comprising: a rod extending into said connecting pipe for substantially the entire length of said connecting pipe and supported by the outer end of said connecting pipe; a plurality of disk-shaped dividing plates secured to said rod, each of said dividing plates being made of a material with a low thermal conductivity, the diameter of each of said dividing plates being smaller than the inner diameter of said connecting pipe so that a gas flow passageway is formed between the outer surfaces of said dividing plates and the inner surface of said connecting pipe.

Claim 30

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vaccum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; and said cooling means comprising: a pipe of injection of cryogenic mixture disposed inside said connecting pipe, the inner end of said pipe for injection extending into said inner vessel and the outer end of said pipe for injection extending to the outside of said connecting pipe; and; a plurality of disk-shaped dividing plates mounted on said connecting pipe and dividing the inside of said connecting pipe in the longitudinal direction into a plurality of small compartments, each of said dividing plates being made of a material having a low thermal conductivity, the outer diameter of each of said dividing plates being smaller than the inner diameter of said connecting pipe so that a gas flow passageway is formed between the outer surface of said dividing plates and the inner surface of said connecting pipe.

Claim 31

A cryogenic vessel for a superconducting apparatus comprising: a cylindrical inner vessel for containing a superconducting winding of a superconducting device and a cryogenic mixture; a cylindrical dividing pipe having an outer end secured to an outer surface of said inner vessel and an inner end extending into said inner vessel; a cylindrical vaccum insulating vessel surrounding said inner vessel so as to thermally insulate it; a connecting pipe extending into said inner vessel along the inside of said dividing pipe with a radial clearance between the outer surface of said connecting pipe and the inner surface of said dividing pipe and having an inner end opening into the inside of said inner vessel and an outer end opening into the outside of said vacuum insulating vessel, the inner end of said connecting pipe being connected to the inner end of said dividing pipe; and said cooling means comprising: a pipe of injection of cryogenic mixture disposed inside said connecting pipe, the inner end of said pipe for injection extending into said inner vessel and the outer end of said pipe for injection extending to the outside of said connecting pipe; and; a plurality of disk-shaped dividing plates mounted on said connecting pipe and dividing the inside of said connecting pipe in the longitudinal direction into a plurality of small compartments, each of said dividing plates being made of a material having a low thermal conductivity, the outer diameter of each of said dividing plates being smaller than the inner diameter of said connecting pipe so that a gas flow passageway is formed between the outer surface of said dividing plates and the inner surface of said connecting pipe.