Portable thermo-anemometer with bimetallic sensor

Details Portable thermo-anemometer with bimetallic sensor Portable thermo-anemometer with bimetallic sensor

Filed on

1980-01-25

Date issued

1982-04-27

Examiner

Yasich, Daniel M.

Patent Class

Communications: electrical

SubClass

Condition responsive indicating system

SubSubClass

Specific condition

Other Related Categories

73357, 733635, G01K 500, G08B 1706

Type

Patent

Status

active

Patent number

043267807

Description

ABSTRACT:
An extremely sensitive portable thermo-anemometer comprises: (1) a matched pair of preformed bimetallic cantilevers which are arranged symmetrically to face and bend toward each other upon a temperature change and which also functions as a vibrating contact switch, current path and heat sink; (2) mechanically combined actions, of a thumbwheel, a lead screw and a rider, which provide an accurate means of controlling, balancing, and indicating the separation of the two tips in opposition to the thermally induced bending force with screw and wedge action; (3) a contact indicating system having a LED lamp and power supply; and (4) a casing which houses the working components and supports their functions. For household heat loss and draft detection, methods for accurate determination of temperature drop based on the sharp transition between near contact and complete contact as a "nulling point" and for measuring cold air velocity based on transient heat transfer process between the sensor and the cold air and the effect of air velocity on the rate of transfer.

REFERENCES:
patent: 2549623 (1951-04-01), Moore, Jr.
patent: 2821837 (1958-02-01), McCorkle, Sr.
patent: 2873329 (1959-02-01), Swenson
patent: 2959958 (1960-11-01), Savet
patent: 3123903 (1964-03-01), Flanagan
patent: 3238780 (1966-03-01), Doyle
patent: 3570313 (1971-03-01), Frank et al.
patent: 3656080 (1972-04-01), Wells
patent: 3745545 (1973-07-01), Darbo
patent: 3857285 (1974-12-01), Athey et al.
patent: 4000647 (1977-01-01), Tauchmann
patent: 4136330 (1979-01-01), Estaque
patent: 4220950 (1980-09-01), Clark et al.

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