Wireworking – Joining wire – Machines
Patent
1977-06-27
1979-01-02
Larson, Lowell A.
Wireworking
Joining wire
Machines
140149, B21F 700
Patent
active
041322509
ABSTRACT:
A system is disclosed for use in twisting together two or more wires precisely to a predetermined number of turns. The apparatus includes a pair of spaced chucks adapted to grip opposite ends of the wires which are placed therebetween for twisting. A manually operated switch causes the chuck jaws to close through a pneumatic control at the start of the twisting operation once the wires are in position. At the end of the twisting operation the jaws open automatically and the twisted wires are dropped. One of the chucks is fixed against rotation but is adapted to slide axially to a limited extent controlled by means of a coil spring in order to accommodate for the shortening of the wires as they are twisted. The other chuck is fixed against axial motion but rotatably mounted and driven by a motor adapted to rotate for a precise number of turns. A counting circuit controls the motor and includes means for twisting wires beyond the preset number of turns and then reversing the turns in order to remove any tendency for the twisted wires to unwind.
REFERENCES:
patent: 2217301 (1940-10-01), Wennberg
patent: 2234641 (1941-03-01), Baumgartner
patent: 3957092 (1976-05-01), Loy et al.
Brown William T.
LeBlanc Larry M.
Moran Robert J.
Alphatron Incorporated
Larson Lowell A.
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