Charles Phillip Bowman

US Patent:

46755691, Jun 23, 1987

Filed:

Aug 4, 1986

Appl. No.:

6/892632

Inventors:

Charles H. Bowman - Raleigh NC
Jeffrey A. Farringer - Cary NC
Richard L. Garwin - Scarsdale NY
Larry L. Greene - Cary NC
James L. Levine - Yorktown Heights NY
Anthony W. Miles - Raleigh NC
Kevin H. Vorhees - Raleigh NC

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H01L 4108

US Classification:

310328

Abstract:

A piezoelectric touch screen assembly can be attached to mounting ears on an ordinary CRT assembly. The touch screen assembly includes a frame, a glass plate which is seated on a gasket at one surface of the frame and a plurality of piezoelectric elements which are bonded to the glass plate and are "trapped" between the CRT face and the glass plate. Studs extend outwardly from the CRT ears through openings in the frame. Coil springs are placed on the studs and are trapped by washer nuts to load the touch screen assembly toward the CRT by a predetermined amount. Grommets with a unique cross sectional configuration are mounted at the openings through the frame. The grommet is designed to provide minimal resistance to movement of the touch screen assembly toward or away from the CRT face but greater resistance to movement of the assembly in other directions.