Electrical resistors – Resistance value responsive to a condition – Current and/or voltage
Patent
1986-04-23
1990-12-11
Reynolds, Bruce A.
Electrical resistors
Resistance value responsive to a condition
Current and/or voltage
338 22R, 338 25, H01C 710
Patent
active
049773852
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: 3302458 (1967-02-01), Scadron
patent: 3324722 (1967-06-01), Reicks
patent: 3648518 (1972-03-01), Hans et al.
patent: 3751968 (1973-08-01), Loh et al.
patent: 3921450 (1975-11-01), Pfister
patent: 4244217 (1981-01-01), Ledbetter
patent: 4357830 (1982-11-01), Kohama et al.
patent: 4365229 (1982-12-01), Tokarz
patent: 4449404 (1984-05-01), Bohme
Lateef M. M.
Reynolds Bruce A.
LandOfFree
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.
Profile ID: LFUS-PAI-O-392061