Method and apparatus for detecting temperature variation utilizi

Details Method and apparatus for detecting temperature variation utilizi Method and apparatus for detecting temperature variation utilizi

1975-07-08

1977-05-17

Strecker, Gerard R.

Measuring and testing

Gas analysis

Moisture content or vapor pressure

73 405R, 324 52, 340227C, G01R 3111, G01K 738

Patent

active

040234126

ABSTRACT:
A method and apparatus for detecting a temperature variation above or below a predetermined value by providing in the area where the temperature variation is to be detected an electrical circuit comprising at least two parallel conductors. The conductors are insulated from each other by a dielectric material and have positioned between them a quantity of a magnetically soft ferromagnetic material having a Curie point approximately equivalent to the predetermined temperature. By transmitting a pulse along said circuit and measuring the time interval before a reflection of the said pulse is detected, the location of a temperature variation can be detected.

REFERENCES:
patent: 2615973 (1952-10-01), Heath
patent: 2926343 (1960-02-01), Postal
patent: 3211002 (1965-10-01), Franklin
patent: 3418207 (1968-12-01), Becker et al.
patent: 3510762 (1970-05-01), Leslie
patent: 3588689 (1971-06-01), Crawford

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