PETER MARTIN NEWGARD
Pilots at Rivendale Ln, Rainier, WA
License number
Washington A1383282
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
17248 Rivendale Ln SE, Rainier, WA 98576
Professional information
Three-Axis Force Measurement Stylus
US Patent:
RE35016, Aug 15, 1995
Filed:
Jan 30, 1992
Appl. No.:
7/831257
Inventors:
Larry S. Gullman - La Honda CA
Roy Kornbluh - Palo Alto CA
Thomas P. Low - La Honda CA
Peter M. Newgard - Rainier WA
Eric J. Shrader - La Honda CA
Roy Kornbluh - Palo Alto CA
Thomas P. Low - La Honda CA
Peter M. Newgard - Rainier WA
Eric J. Shrader - La Honda CA
Assignee:
SRI International, Inc. - Menlo Park CA
International Classification:
G01L 516, G06K 900
US Classification:
73862041
Abstract:
A three-axis force measurement stylus includes a housing and a cartridge and an interface between the housing and the cartridge wherein the interface comprises a plurality of pressure sensitive sheets, preferably of variable resistance pressure sensitive Mylar films which sense the force between the cartridge and the housing. The cartridge and the housings are disposed at a skew angle relative to the axis of the stylus to be able to sense forces in three dimensions. In a specific embodiment, the cartridge forms a conical section which mates with a complimentary conical section of the housing. Membranes of the force sensitive material are provided along three fingers from an apex of the conical section. The cartridge is preloaded against the conical section by a spring between the housing and the cartridge. Alternatively to the force sensitive film, a sheet of a piezoelectric pressure-sensitive material may be substituted.