Apparatus for the remote control of mains operated DC and AC wel

Details Apparatus for the remote control of mains operated DC and AC wel Apparatus for the remote control of mains operated DC and AC wel

1979-03-20

1981-05-05

Shaw, C. C.

Electric heating

Metal heating

By arc

B23K 910

Patent

active

042661145

ABSTRACT:
Apparatus for the remote control of mains operated DC and AC welding machines without any additional cable to the working place, comprising a portable regulating device adapted to be connected into the welding current circuit between the electrode or the electrode holder and the workpiece or a clamp therefor. This device selectively generates different control signals in the welding cables when receiving a current supply through the welding cables, and a regulating circuit in the welding machine is adapted to receive these control signals through the welding cables from the regulating device and to cause regulation of functions in the welding machine or in association therewith in response to the control signals. The regulating circuit comprises a decoding circuit which in response to the pulse-shaped control signals in the welding cables, is adapted to produce regulating signals for the welding machine depending upon the number of pulses or the code of pulses being provided by the regulating device, and a blocking circuit which prevents the formation of regulating signals in the decoding circuit when currents of the same order of magnitude as the welding current flow in the welding cables.

REFERENCES:
patent: 2175882 (1939-10-01), De Croce
patent: 2201868 (1940-05-01), Moffett
patent: 2526597 (1950-10-01), Winslow
patent: 3899773 (1975-08-01), Yamauchi et al.

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