Remote control for welding machine amperage
First Claim
1. In combination with an amperage control device for welding apparatus having a welding generator, a rotatable rheostat for regulating welding current conducted to a welding electrode, a reversible step motor connected to the rheostat, pulse driving means connected to the step motor for incremental displacement of the rheostat and frequency responsive means connected to the pulse driving means for selecting the direction in which the step motor displaces the rheostat, the improvement including a radiant energy receiver, decoding means connected to the receiver for transmitting only digitally coded signals to the frequency responsive means, remote transmitter means for radiating said digitally coded signals to the receiver, and directional control means connected to the transmitter means for selecting two frequencies at which the digitally coded signals are transmitted by the frequency responsive means to the pulse driving means.
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Accused Products
Abstract
A solenoid operated, ratchet-type step motor incrementally advances the rheostat of a welding apparatus in opposite directions to control welding current. The solenoids are pulsed in response to reception of a frequency and digitally coded radiant energy signal by a receiver to which signals are transmitted from a remote transmitter having direction selecting push button switches.
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Citations
4 Claims
- 1. In combination with an amperage control device for welding apparatus having a welding generator, a rotatable rheostat for regulating welding current conducted to a welding electrode, a reversible step motor connected to the rheostat, pulse driving means connected to the step motor for incremental displacement of the rheostat and frequency responsive means connected to the pulse driving means for selecting the direction in which the step motor displaces the rheostat, the improvement including a radiant energy receiver, decoding means connected to the receiver for transmitting only digitally coded signals to the frequency responsive means, remote transmitter means for radiating said digitally coded signals to the receiver, and directional control means connected to the transmitter means for selecting two frequencies at which the digitally coded signals are transmitted by the frequency responsive means to the pulse driving means.
Specification