Joseph Charles Duddy

US Patent:

41093585, Aug 29, 1978

Filed:

Apr 22, 1977

Appl. No.:

5/790128

Inventors:

Joseph C. Duddy - Trevose PA
Edward R. Hein - Doylestown PA

Assignee:

ESB Ray-O-Vac Management Corporation - Philadelphia PA

International Classification:

B23P 1500
B23P 2500

US Classification:

29 2

Abstract:

A unique alloy comprising lead with small additions of zinc and tin is used to make grids for lead acid cells. The alloy as produced is softer than is desirable. It is hardened by mechanical working. When properly worked, it has a strength and stiffness approaching that of other low alloy lead materials currently in use as storage battery grids.

US Patent:

40355560, Jul 12, 1977

Filed:

Apr 7, 1972

Appl. No.:

5/241914

Inventors:

Joseph C. Duddy - Trevose PA
Edward R. Hein - Doylestown PA

Assignee:

ESB Incorporated - Philadelphia PA

International Classification:

H01M 466

US Classification:

429245

Abstract:

A unique alloy comprising lead with small additions of zinc and tin is used to make grids for lead acid cells. The alloy as produced is softer than is desirable. It is hardened by mechanical working. When properly worked, it has a strength and stiffness approaching that of other low alloy lead materials currently in use as storage battery grids.

US Patent:

43158293, Feb 16, 1982

Filed:

Jan 27, 1978

Appl. No.:

5/872870

Inventors:

Joseph C. Duddy - Trevose PA
Francis P. Malaspina - Raleigh NC
William J. Martini - Fairless Hills PA

Assignee:

Exide Corporation - Philadelphia PA

International Classification:

C08L 2718

US Classification:

2521821

Abstract:

A method of preparing a battery paste for a lead-acid storage battery comprising: (a) mixing a water dispersion of polyfluoroethylene with lead material, (b) adding an aqueous solution of sulfuric acid to the lead material-dispersion mix and mixing to form a paste having fibrillation developed therein, (c) controlling the amount of fibrillation developed in the paste, and (d) controlling the paste density for use in a battery plate. The method provides an improved paste which permits substantial reduction in plate weights and density and loss of active material in the grid structure due to plate shedding over a conventional lead-acid paste. The saving in active material ranges from 10 to 30% over a conventional lead-acid paste without reduction in battery performance.