H - Electricity – 01 – H
Patent
H - Electricity
01
H
26/120
H01H 11/00 (2006.01)
Patent
CA 1051180
ABSTRACT OF THE DISCLOSURE A method of manufacturing sealed thermostats or the like is disclosed in which male and female members are assembled with an interference fit to produce a seal which is maintained through a predetermined operating temperature range. The minimum interference during assembly is selected so that such minimum interference is greater than the difference in the temperature during assembly and the most adverse seal temperature to be en- countered within the temperature range, times the difference in coefficients of thermal expansion and contraction between the members times the linear dimension of the seal. In addition, the two members are selected so that the maximum total elastic deformation is greater than the difference in coefficient of thermal expansion and contraction times the difference between the maximum and minimum temperatures within the temperature range times the linear dimension. Preferably, the interference is selected so that the female member is stressed beyond its elastic limit, at least when the device is cycled throughout the temperature range to produce a mechanical interlocking of the two parts. The assembly of the device may also be arranged to provide calibration and/or gauging of the device.
270749
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