David D Mcdevitt

US Patent:

51376857, Aug 11, 1992

Filed:

Mar 1, 1991

Appl. No.:

7/662876

Inventors:

David D. McDevitt - Greenwood IN
Jacob Crane - Woodbridge CT
John F. Breedis - Trumbull CT
Ronald N. Caron - Branford CT
Frank N. Mandigo - North Branford CT
Joseph Saleh - Branford CT

Assignee:

Olin Corporation - New Haven CT

International Classification:

C22C 900

US Classification:

420477

Abstract:

Machinable copper alloys having a reduced lead concentration are disclosed. An additive to the alloy accumulates both at the grain boundaries and intragranularly. The additive facilitates chip fracture or lubricates the tool. One additive is a mixture of bismuth and lead with the lead concentration below about 2% by weight.

US Patent:

54095522, Apr 25, 1995

Filed:

Nov 22, 1993

Appl. No.:

8/155680

Inventors:

David D. McDevitt - Greenwood IN
Jacob Crane - Woodbridge CT
John F. Breedis - Trumbull CT
Ronald N. Caron - Branford CT
Frank N. Mandigo - North Branford CT
Joseph Saleh - Branford CT

Assignee:

Olin Corporation - New Haven CT

International Classification:

C22C 900

US Classification:

148434

Abstract:

Machinable alpha beta brass having a reduced lead concentration is claimed. The alloy contains bismuth to improve machinability. Either a portion of the zinc is replaced with aluminum, silicon or tin, or a portion of the copper is replaced with iron, nickel or manganese.

US Patent:

56371608, Jun 10, 1997

Filed:

Jul 20, 1994

Appl. No.:

8/277928

Inventors:

Andrew J. Brock - Cheshire CT
John F. Breedis - Trumbull CT
Jack Crane - Woodbridge CT
Julius C. Fister - Hamden CT
Frank N. Mandigo - North Branford CT
David D. McDevitt - Greenwood IN
Mark N. Pearman - Carmel IN
Ronald N. Caron - Branford CT

Assignee:

Olin Corporation - New Haven CT

International Classification:

C22C 904

US Classification:

148434

Abstract:

There is provided a machinable. alpha. +. beta. brass containing bismuth and phosphorous. By maintaining the phosphorous content within a critical range, the alloy exhibits good elevated temperature tensile elongation in the temperature range of 100. degree. C. -350. degree. C. without a decrease in machinability due to phosphide formation. In preferred embodiments, the alloy further contains a tin addition for enhanced corrosion resistance. The combination of tin and phosphorous provides enhanced corrosion resistance to the alloy than could be predicted from either addition alone.

US Patent:

52884589, Feb 22, 1994

Filed:

Jul 1, 1992

Appl. No.:

7/907473

Inventors:

David D. McDevitt - Greenwood IN
Jacob Crane - Woodbridge CT
John F. Breedis - Trumbull CT
Ronald N. Caron - Branford CT
Frank N. Mandigo - North Branford CT
Joseph Saleh - Branford CT

Assignee:

Olin Corporation - New Haven CT

International Classification:

C22C 900

US Classification:

420477

Abstract:

Machinable alpha beta brass having a reduced lead concentration is claimed. The alloy contains bismuth to improve machinability. Either a portion of the zinc is replaced with aluminum, silicon or tin, or a portion of the copper is replaced with iron, nickel or manganese.