Protection circuit for plasma-arc welding and cutting equipment operated with transferred or non-transferred arc
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 22, 1991
Grant Date -
N/A
app pub date -
Oct 24, 1989
filing date -
Nov 15, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The circuit is designed to protect plasma-arc welding or cutting equipment wired for transferred or non-transferred arc operation, using a torch of which the electrode is connected to the negative terminal of the power source and the nozzle to the positive; the arc can be transferred by wiring the work to the positive terminal also. With voltage between at least two of the three connected parts (electrode, nozzle and work) constantly monitored, filtered, and measured against a set point by a comparator of which the output operates a switch controlling the power supply to the equipment, the power source can be deactivated immediately in the event that the monitored voltage registers less than the set point.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully