Distributed RTD

Details Distributed RTD Distributed RTD

1990-06-25

1992-05-26

Lateef, Marvin M.

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

338 22R, 73 3105, 296101, H01C 710

Patent

active

051172160

ABSTRACT:
An RTD (resistance temperature sensor or detector) sensing device which is a long, thin, unitary device adapted to be distributed across an extended field for the continuous, uninterrupted sensing or interrogation of such field, avoiding the inaccuracy, unreliability, and excessive expense of conventional "point" RTD and thermocouple sensors currently employed for this purpose. According to the invention, a very long, thin, ductile protective metal outer sheath houses a coextensive body of insulation material, which in turn supports and electrically insulates one or more coextensive RTD filaments and in most forms of the invention one or more heater filaments. Distributed RTDs of the invention may, along their lengths, have continuous linear function sensitivity, continuous variable function sensitivity, or step function sensitivity. Distributed RTDs of the invention have particular utility for gauging liquid level, measuring average mass flow velocity of fluids in large ducts, and sensing the average temperature of an extended nonisothermal field.

REFERENCES:
patent: 2456617 (1948-12-01), Burch
patent: 2470653 (1949-05-01), Schulman et al.
patent: 2679642 (1954-05-01), Wexler
patent: 2685015 (1954-07-01), Weiller
patent: 2728832 (1955-12-01), Hoffman
patent: 3005171 (1961-10-01), Beckman
patent: 3031887 (1962-05-01), Weisend
patent: 3118136 (1964-01-01), Steele III
patent: 3267733 (1966-08-01), Chambers
patent: 3302458 (1967-02-01), Scadron
patent: 3324722 (1967-06-01), Reicks
patent: 3372590 (1968-03-01), Sterling
patent: 3485100 (1969-12-01), Petersen
patent: 3564916 (1971-02-01), Collins et al.
patent: 3648518 (1972-03-01), Hans et al.
patent: 3751968 (1973-08-01), Loh et al.
patent: 3921450 (1975-11-01), Pfister
patent: 4053874 (1977-10-01), Glaser
patent: 4085286 (1978-04-01), Horsma et al.
patent: 4116045 (1978-09-01), Potter
patent: 4163391 (1979-08-01), Bezard et al.
patent: 4244217 (1981-01-01), Ledbetter
patent: 4246468 (1981-01-01), Horsma
patent: 4250016 (1981-02-01), Sauer et al.
patent: 4276773 (1981-07-01), Kawai et al.
patent: 4297881 (1981-11-01), Sasayama et al.
patent: 4299126 (1981-11-01), Heuwieser et al.
patent: 4338814 (1982-07-01), Romann
patent: 4344322 (1982-08-01), Plapp
patent: 4356728 (1982-11-01), Gomez
patent: 4357830 (1982-11-01), Kohama et al.
patent: 4361037 (1982-11-01), Hauschild et al.
patent: 4365229 (1982-12-01), Tokarz
patent: 4393697 (1983-07-01), Sato et al.
patent: 4411155 (1983-10-01), Coulange
patent: 4449403 (1984-05-01), McQueen
patent: 4449404 (1984-05-01), Bohme et al.
patent: 4450714 (1984-05-01), Prohaska et al.
patent: 4471655 (1984-09-01), Obayashi et al.
patent: 4503322 (1985-03-01), Kishimoto et al.
patent: 4513616 (1985-04-01), Bezard et al.
patent: 4521373 (1985-06-01), Terhune et al.
patent: 4525850 (1985-06-01), Miller
patent: 4532799 (1985-08-01), O'Neill
patent: 4578996 (1986-04-01), Abe et al.
patent: 4590797 (1986-05-01), Beaubatie et al.
patent: 4619140 (1986-10-01), Kuhnel
patent: 4739656 (1988-04-01), Collins et al.
patent: 4741209 (1988-05-01), McCulloch
patent: 4753111 (1988-06-01), Caron et al.
patent: 4805452 (1989-02-01), Eiermann et al.
patent: 4977385 (1990-12-01), McQueen

Affiliated with

Also associated with

Rating

Distributed RTD does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Distributed RTD, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distributed RTD will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-422651