Electric heating – Metal heating – By arc
Patent
1983-08-24
1986-06-17
Albritton, C. L.
Electric heating
Metal heating
By arc
2191304, B23K 900
Patent
active
045958181
ABSTRACT:
A flame cutting apparatus includes a pair of longitudinally movable gantries and a connecting transverse bridge which mounts carriages with flame cutting torches including a plasma torch unit. A computer numerical controller is fixedly mounted adjacent to one gantry. Position sensors and operating devices are mounted on the bridge with a high frequency supply for igniting the plasma torch and supplemental electronic circuits. The bridge is a generally hollow box-beam having doors within which the supplemental electronic circuitry to mechanically and electronically isolate them. Cables are provided for connecting the bridge mounted sensors and operating devices to an onboard computer controller. A special filter unit is mounted in the controller-mounted gantry. The filter unit includes an enclosure and a plurality of separate filters each of which is connected to a lead of the cable. The filters isolate the controller from electronic noise and extraneous signals in the cables.
REFERENCES:
patent: 4017707 (1977-04-01), Brown et al.
patent: 4151395 (1979-04-01), Kushner et al.
patent: 4156125 (1979-05-01), Brown
patent: 4255643 (1981-03-01), Baltonz
patent: 4436288 (1984-03-01), Kellogg et al.
Mingesz August C.
Nelson James A.
Albritton C. L.
C-R-O, Inc.
Lateef M. M.
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