Dual temperature sensing device having twin well thermowell for

Batteries: thermoelectric and photoelectric – Thermoelectric – Having housing – mounting or support

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Details

136232, 136221, 136242, 374208, 376247, H01L 3502

Patent

active

047785381

ABSTRACT:
A dual temperature sensing device has a twin well thermowell, for installation through a penetration in a pipe wall, and which has head, shank and tip portions. The shank portion has a first part of substantially the same outer dimensions as the penetration and the head portion is of greater outer dimensions so as to define an annular ledge which overlies the exterior surface of the pipe wall, for welding same thereto. The first part of the shank portion is of greater axial length than the pipe wall thickness and a second part thereof is tapered and elongated, for disposing the tip portion within the interior of the pipe. A pair of bores extend from the outer surface of the head portion at angularly inclined and converging relationship to closely spaced, but physically separated, positions in the tip portion. The head is counter-bored relative to the first bores, to define sockets for receiving the lower ends of pipe nipples, the upper ends of which are closed by pipe unions. Dual resistance temperature detectors are received through the respective pipe nipples with the elongated sensors extending through the respective bores to the tip portion of the thermowell, and are resiliently urged into position. Fittings, secured to the electrical cables of the detectors, are received in threaded engagement in the respective pipe unions and are removable for replacement of detectors. The detectors are both electrically and physically separated, and, produce identical, dual temperature indicating outputs.

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patent: 4217463 (1980-08-01), Swearingen
patent: 4510343 (1985-04-01), Sivyer
patent: 4552465 (1985-11-01), Anderson
patent: 4590326 (1986-04-01), Woldy et al.
patent: 4653443 (1987-03-01), Fukazawa et al.

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