Samuel E Miller

US Patent:

41978986, Apr 15, 1980

Filed:

Aug 21, 1978

Appl. No.:

5/935160

Inventors:

Samuel L. Miller - Honey Brook PA

Assignee:

Lukens Steel Company - Coatesville PA

International Classification:

B22D 2702

US Classification:

164 4

Abstract:

A method and apparatus for controlling the cooling rate at the bottom of molds used in the electroslag remelting process as the ingots solidify therein to provide a slow cooling and eliminate butt cracking in the bottoms of such ingots.

US Patent:

40876705, May 2, 1978

Filed:

Nov 6, 1974

Appl. No.:

5/521406

Inventors:

Samuel L. Miller - Honey Brook PA

Assignee:

Lukens Steel Corp. - Coatesville PA

International Classification:

B23K 900

US Classification:

219121P

Abstract:

Noise, fuels and potentially dangerous light emissions generated by a plasma-arc cutting operation are suppressed by carrying out the operation with a solid layer of water surrounding the space between the hot effluent discharge of the torch and the workpiece. To localize the layer of water immediately under the discharge nozzle of the torch, a jacket is provided around the lower end of the torch which continually is receiving and discharging water through a skirt guidance member depending from the jacket thus providing a contained volume of moving water around the space involved which immerses the end of the nozzle. A water layer is also provided under the workpiece which receives water leaking around the skirt member and through the kerf created by the torch under its nozzle. Water from under the workpiece is circulated through a separator to remove unwanted materials introduced by the cutting operation. The skirt member is preferably composed of a pliant material such as asbestos cloth, rubber, or brush bristles.