Method and apparatus for making multistrand superconducting cable

Patent · Mon Jan 01 00:00:00 EST 1990

OSTI ID:867484

Royet, John M ^[1]; Armer, Rollin A ^[2]

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1. Oakland, CA
2. Orinda, CA

Improved multistrand Rutherford-type superconducting cable (42) is produced in a flattened form with two layers of helically wound strands (33) and in which the strands are alternately twisted about their lengths equally and in opposite directions to provide a flat cable with improved stability. In particular, the cable (42) is made by guiding multifilament wire strands (33) from spools (32) on a rotating turret (11) to a fixed tapered forming mandrel (22) where they are wound diagonally around the mandrel and then rolled into a flattened shape. The spools (32) are located around the periphery of the turret and are rotatable about axes in a plane parallel to the turret (11) to unroll the wire. Sprocket assemblies (48 and 49) are driven by drive chains (68 and 76) to rotate alternate spools (32) equally and in opposite directions relative to the forming mandrel (22) so that the wire strands (33) are twisted prior to being wound on the mandrel (22). The rate of rotation of the spools (32) in one direction is different than the rate of rotation of the spools (32) in the opposite direction to compensate for the rate of rotation of the turret (11) so that all strands (33) have the same degree of twist about their lengths.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• DOE Contract Number: AC03-76SF00098
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4947637
• OSTI ID: 867484
• Country of Publication: United States
• Language: English

Related Subjects

method
apparatus
multistrand
superconducting
cable
improved
rutherford-type
42
produced
flattened
form
layers
helically
wound
strands
33
alternately
twisted
lengths
equally
opposite
directions
provide
flat
stability
particular
guiding
multifilament
wire
spools
32
rotating
turret
11
fixed
tapered
forming
mandrel
22
diagonally
rolled
shape
located
periphery
rotatable
axes
plane
parallel
unroll
sprocket
assemblies
48
49
driven
drive
chains
68
76
rotate
alternate
relative
prior
rate
rotation
direction
compensate
degree
twist
superconducting cable
plane parallel
opposite direction
opposite directions
improved stability
multifilament wire
wire strands
multistrand rutherford-type
flat cable
helically wound
improved multistrand
/57/