WILLIAM T MARSTON
Engineering in Milton, MA
License number
Massachusetts 17256
Issued Date
Oct 17, 1961
Expiration Date
Jun 30, 1998
Type
Mechanical Engineer
Address
Address
Milton, MA 02186
Professional information
Hardness Testing Diamond Indenter
US Patent:
5046357, Sep 10, 1991
Filed:
Jan 19, 1990
Appl. No.:
7/467499
Inventors:
William T. Marston - Milton MA
Assignee:
Crafts Precision Industries, Inc. - Canton MA
International Classification:
G01N 342
US Classification:
73 85
Abstract:
An indenter used in hardness testing apparatus to penetrate hard metals and other materials consists of a shank body having at its end a conical frustum with a cylindrical recess extending axially from that end, and a cone of polycrystalline diamond bonded to a hard metal rod which, in turn is bonded in the cylindrical recess concentrically with the axis of the body.