David H Fritts

US Patent:

H8583, Dec 4, 1990

Filed:

Oct 24, 1988

Appl. No.:

7/261804

Inventors:

John F. Leonard - Beavercreek OH
Stephen Vukson - Tipp City OH
David H. Fritts - Dayton OH
Ken Y. Kim - Beavercreek OH

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

H01M 436

US Classification:

429104

Abstract:

An improved capillary action wicking structure and method with a method for its making and with application of the wicking structure to a high temperature electrical battery cell of the sodium/sulfur type. The wicking structure includes finely-divided metal particles of nickel, for example, that are attached to the solid electrolyte structure in the electrical battery cell by an organic binder and sintering combination.

US Patent:

48942987, Jan 16, 1990

Filed:

Oct 24, 1988

Appl. No.:

7/261802

Inventors:

Stephen P. Vukson - Tipp City OH
David H. Fritts - Dayton OH
John F. Leonard - Beavercreek OH
Kwang Y. Kim - Beavercreek OH

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

H01M 1039

US Classification:

429 50

Abstract:

An alkali metal plus halide electrical battery cell of, for example, the sodium and sulfuryl chloride type is disclosed. The disclosed cell provides accommodation for cell chemical reaction products that otherwise preclude achievement of secondary battery action or rechargeable nature in such cells and provides two physical accommodation changes, a reaction space and a reaction space temperature, in the cell arrangement to enable repeated charge and discharge cycling of the cell. The disclosed cell is shown to be embodied in a laboratory type structure and is described with net reaction or end result equations of a combined chemical and physical nature.

US Patent:

43954693, Jul 26, 1983

Filed:

Jul 14, 1981

Appl. No.:

6/283245

Inventors:

David H. Fritts - Dayton OH

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

H01M 200
H01M 204
H01M 436
H01M 818

US Classification:

429 34

Abstract:

The battery system has the hydrogen gas stored at high pressure separately from the nickel-hydrogen cells. Two valves, a pressure regulator, and a pump permit hydrogen to be supplied to the cells at a relatively low pressure for discharge, and to be recovered and stored at high pressure during charge. Both valves are closed during standby to limit self discharge.

US Patent:

46236007, Nov 18, 1986

Filed:

Aug 23, 1985

Appl. No.:

6/768657

Inventors:

David H. Fritts - Dayton OH
John F. Leonard - Xenia OH

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

H01M 432
H01M 480

US Classification:

429223

Abstract:

A low shear battery plaque and a nickel electrode fabricated therefrom, the latter consisting essentially of a centrally located layer of a conductive felt, layers of sintered nickel on each side of the felt and nickel hydroxide active material disposed throughout the pores of the sintered nickel.

US Patent:

41362349, Jan 23, 1979

Filed:

Apr 17, 1978

Appl. No.:

5/896862

Inventors:

David H. Fritts - Dayton OH

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

H01M 202

US Classification:

429178

Abstract:

In a porous electrode primary battery a sensing grid is positioned in a cell on or near the surface of the porous cathode facing the separator and anode. The voltage measured between this sensing grid and the conventional cathode current collector grid is a function of the current distribution within the electrode which is continuously changing as the battery discharges, thus the measured voltage is indicative of the state of charge of the particular cell having the sensing grid and for a battery containing cooperatively connected cells, the state of the battery in general.

US Patent:

46285938, Dec 16, 1986

Filed:

Aug 23, 1985

Appl. No.:

6/768790

Inventors:

David H. Fritts - Dayton OH
John F. Leonard - Xenia OH

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

H01M 426
H01M 480

US Classification:

296231

Abstract:

A low shear battery plaque and a nickel electrode fabricated therefrom, the latter consisting essentially of a centrally located layer of a conductive felt, layers of sintered nickel on each side of the felt and nickel hydroxide active material disposed throughout the pores of the sintered nickel.

US Patent:

43809260, Apr 26, 1983

Filed:

Jan 22, 1981

Appl. No.:

6/227564

Inventors:

David H. Fritts - Dayton OH
John F. Leonard - Xenia OH

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

G01N 344

US Classification:

73 83

Abstract:

A unique electrode plaque hardness tester, and a method of testing for the hardness of an electrode plaque specimen, are taught. The hardness tester is of the indentation type, and permits the hardness testing of an electrode plaque that is very thin (e. g. , 0. 75 mm) and that is made of non-homogenous, sintered material, such as a nickel electrode plaque. A fixed load, comprising a lesser first load and a larger second load, is applied in sequence to a test specimen of the electrode plaque, with two superimposed indentations resulting. The hardness of the electrode plaque, as a result of the use of this tester, is inversely related to the difference in the depths of the two indentations. Data acquired as a result of testing specimens with this hardness tester establishes that the harder the electrode plaque is, the less efficient is the performance of an active battery electrode which includes this electrode plaque.

US Patent:

41267354, Nov 21, 1978

Filed:

Oct 21, 1977

Appl. No.:

5/844162

Inventors:

David H. Fritts - Dayton OH

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

H01M 1048

US Classification:

429 91

Abstract:

In a porous electrode primary battery a sensing grid is positioned in a cell on or near the surface of the porous cathode facing the separator and anode. The voltage measured between this sensing grid and the conventional cathode current collector grid is a function of the current distribution within the electrode which is continuously changing as the battery discharges, thus the measured voltage is indicative of the state of charge of the particular cell having the sensing grid and for a battery containing cooperatively connected cells, the state of the battery in general.