RANULF W GRAS
Engineering in Lincoln Center, MA
License number
Massachusetts 3923
Issued Date
Nov 14, 1947
Expiration Date
Jun 30, 1990
Type
Mechanical Engineer
Address
Address
Lincoln Center, MA 01773
Professional information
Substrate Carrier
US Patent:
4201374, May 6, 1980
Filed:
Dec 21, 1978
Appl. No.:
5/971651
Inventors:
Ranulf W. Gras - Lincoln MA
Assignee:
Teradyne, Inc. - Boston MA
International Classification:
B25B 120
US Classification:
269 37
Abstract:
A substrate carrier with a generally flat base, a plurality of fence portions protruding from the base to bear against sides of the substrates, and a plurality of arms spring biased toward the fence portions to retain the substrates, the arms having portions exposed to the underside of the base for engaging external actuating means to retract the arms for insertion or removal of the substrates.