Method and apparatus for welding metallic parts
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United States of America Patent
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-
Jun 9, 1987
Grant Date -
N/A
app pub date -
Jun 17, 1985
filing date -
Jun 17, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus is provided for applying an electrical welding current between contacting members upon detecting a predetermined electrical resistance therebetween. Measurement current pulses are applied through the contacting members prior to the initiation of a weld current therethrough. Measurement voltage pulses, induced by the applied measurement current pulses, are compared against a reference voltage level. When the magnitude of the voltage pulses decreases to a value less than the reference voltage level, a weld signal is generated which causes the application of the weld current through the contacting members for a predetermined period of time.
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