Thermal measuring and testing – Thermal testing of a nonthermal quantity – Expansion or contraction characteristics
Patent
1985-02-21
1990-01-30
Cuchlinski, Jr., William A.
Thermal measuring and testing
Thermal testing of a nonthermal quantity
Expansion or contraction characteristics
374 55, G01N 2516
Patent
active
048969737
ABSTRACT:
A thermomechanical analysis apparatus includes a probe assembly supported in substantially weightless contact with a sample material over a range of displacement of the probe by means of a linear motor controlled from a constant current source. The probe assembly is automatically weighed by measuring and storing the value of the current needed to raise the probe, that value is thereafter employed during the analysis mode to maintain the probe assembly in a substantially weightless condition.
REFERENCES:
patent: 3474658 (1969-10-01), Levy et al.
patent: 3589167 (1971-06-01), Hill
patent: 3680357 (1972-08-01), Clusener
patent: 4019365 (1977-04-01), Woo
patent: 4354764 (1982-10-01), Achermann et al.
Hill Harold I.
Murray Thomas M.
O'Neill Michael J.
Cuchlinski Jr. William A.
Grimes Edwin T.
Murphy Thomas P.
The Perkin-Elmer Corporation
Will Thomas B.
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