David L Beck

US Patent:

42525640, Feb 24, 1981

Filed:

Aug 21, 1979

Appl. No.:

6/068358

Inventors:

John G. Banker - Boulder CO
Hubert L. Wigginton - Oak Ridge TN
David E. Beck - Knoxville TN
Cressie E. Holcombe - Knoxville TN

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

C22B 6002

US Classification:

75 841R

Abstract:

The concentration of carbon in uranium metal ingots induction cast from derbies prepared by the bomb-reduction of uranium tetrafluoride in the presence of magnesium is effectively reduced to less than 100 ppm by removing residual magnesium fluoride from the surface of the derbies prior to casting. This magnesium fluoride is removed from the derbies by immersing them in an alkali metal salt bath which reacts with and decomposes the magnesium fluoride. A water quenching operation followed by a warm nitric acid bath and a water rinse removes the residual salt and reaction products from the derbies.

US Patent:

50523465, Oct 1, 1991

Filed:

Jan 14, 1991

Appl. No.:

7/640634

Inventors:

David Beck - Middleville MI

Assignee:

Bradford-White Corporation - Philadelphia PA

International Classification:

F22B 3736

US Classification:

122494

Abstract:

A water heater is made by shielding the space between a tank and a jacket, which space is intended to include a control apparatus accessible from outside the jacket, by making and installing an insulating dam provided of flexible, deformable insulating material, removing corner position from the dam, slitting the block lengthwise with a slit which is surrounded by the block, thereby forming connected body portions, moving the body portions apart from each other, thereby forming an open frame, turning the resulting open frame inside out to form a foam dam, inserting the resulting foam dam around the control apparatus, placing the jacket over the dam and introducing liquid foam forming material into the space between the tank and the jacket.