Electric heating – Metal heating – By arc
Patent
1999-06-10
2000-11-21
Shaw, Clifford C.
Electric heating
Metal heating
By arc
B23K 912
Patent
active
06150632&
ABSTRACT:
An electronic lock-on switch device for controlling the supply of electrode wire from a wire feeder to a welding torch. The device includes a housing that encloses a trigger circuit. The trigger circuit is connectable between the wire feeder and the welding torch for receiving a trigger signal from the torch indicating the trigger has been pressed and transmitting a feed signal to the wire feeder indicating the need to feed wire through the torch. The trigger circuit includes a switch mounted on the outside of the housing to allow the operator to select between normal and lock-on modes of operation. During the normal mode of operation, the wire feeder is activated and deactivated by simply pressing and releasing the trigger of the welding torch. The lock-on mode of operation allows the operator to switch between normal and lock-on modes of operation by simply varying the time in which the trigger is pressed. If the operator continually presses the trigger for a predetermined time period, the trigger circuit will lock on the supply of wire through the torch regardless of whether the trigger is pressed, otherwise, the wire feeder will operate in the normal mode.
REFERENCES:
patent: 2843727 (1958-07-01), Benz, Jr. et al.
patent: 4531045 (1985-07-01), Kemp
patent: 4608482 (1986-08-01), Cox et al.
Shaw Clifford C.
Tregaskiss Ltd.
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