Joseph Waldman

US Patent:

39480062, Apr 6, 1976

Filed:

Jan 15, 1975

Appl. No.:

5/541334

Inventors:

Joseph Waldman - Brooklyn NY

International Classification:

B24B 1916

US Classification:

51229

Abstract:

An improved adjustable diamond faceting platform is described of the type adapted to be mounted on a tong and suitable for supporting a dop. The adjustable diamond faceting platform of the present invention includes a worm gear mounted on the platform. The worm gear has an axis of rotation and includes means for connecting a dop to the worm gear for common rotation about the axis. A worm is rotatably mounted on the platform proximate to the worm gear for meshingly engaging the latter and for rotating the same with corresponding rotation of the worm. The worm is mounted with clearance for limited transverse movements in directions towards and away from the worm gear. The worm is provided with smooth cylindrical shaft portions at each end disposed within the platform. Low friction sleeves are mounted on the shaft portions and adjustable bearing means, in the form of set screws, are mounted on the platform for engaging the sleeves and applying selective pressures to the latter in the direction of the worm gear. In this manner, suitable adjustment of the set screws compensate for tolerances and wear and provides positive engagement between the worm gear and the worm while the latter is permitted to rotate within the sleeves.

US Patent:

42750415, Jun 23, 1981

Filed:

Sep 19, 1980

Appl. No.:

6/188805

Inventors:

Joseph L. Waldman - Elizabeth NJ
Edgar Klein - Odenthal-Osenau, DE
Achim Kulling - Leverkusen, DE
Joseph A. Rahm - Long Branch NJ

Assignee:

NL Industries, Inc. - New York NY

International Classification:

C01G 23053
C01G 2300

US Classification:

423 82

Abstract:

A process is provided for the manufacture of a stable titanyl sulfate solution by diluting a reaction mixture containing iron sulfate and titanyl sulfate with a material selected from water, a titanyl sulfate solution, and mixtures thereof. The titanyl sulfate solution may be recovered or processed to provide titanium dioxide hydrate which may be calcined to provide titanium dioxide pigment.