Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1979-08-07
1981-09-22
Lewis, Michael L.
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
428662, B32B 1504
Patent
active
042911052
ABSTRACT:
There is provided a class of mechanically pre-stressed structures, suitably bi-layer strips comprising a layer of group 5 transition metals in intimate contact with a layer of an intermetallic compound of said transition metals with certain group 3A, 4A or 5A metals or metalloids suitably gallium, indium, silicon, germanium, tin, arsenic or antimony. The changes of Young's modulus of these bi-layered combinations at temperatures in the region of but somewhat above absolute zero provides a useful means of sensing temperature changes. Such bi-metallic strips may be used as control strips in thermostats, in direct dial reading instruments, or the like. The structures are made by preparing a sandwich of a group 5B transition metal strip between the substantially thicker strips of an alloy between copper and a predetermined group 3A, 4A or 5A metal or metalloid, holding the three layers of the sandwich in intimate contact heating the same, cooling the same and removing the copper alloy and then removing one of the two thus formed interlayer alloys between said transition metal and the metal previously alloyed with copper.
REFERENCES:
patent: 3262187 (1966-07-01), Allen et al.
patent: 3309179 (1967-03-01), Fairbanks
patent: 3325888 (1967-06-01), Weinig et al.
patent: 3432280 (1969-03-01), Llewelyn et al.
Bussiere Jean F.
Suenaga Masaki
Welch David O.
Belkin Leonard
Carlson Dean E.
Denny James E.
Lewis Michael L.
The United States of America as represented by the United States
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