Measuring and testing – Volume or rate of flow – Using rotating member with particular electrical output or...
Patent
1991-01-16
1993-04-06
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Using rotating member with particular electrical output or...
G01F 1075
Patent
active
051993074
ABSTRACT:
An automatic power generation type flowmeter generates a measuring signal through measuring of a flow rate of fluid flowing through a passage and transmits it to a receiver at a remote location. The flowmeter includes a power generator coupled to a detection shaft rotated under an action of a fluid flowing through the passage and outputting an electric signal. The power generator includes a permanent magnet having S- and N-poles, an electromagnetic coil having a core around its axis and arranged adjacent to the magnet with the axis of the coil located in a direction substantially perpendicular to a rotation shaft, a first stator magnetically coupled to the core and having its magnetic induction portion arranged opposite to the N-pole of the magnet, and a second stator magnetically connected to the core and having its magnetic induction portion arranged opposite to the S-pole of the magnet.
REFERENCES:
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patent: 3676875 (1972-07-01), Adams et al.
patent: 3685353 (1972-08-01), Gestler et al.
patent: 3772917 (1973-11-01), Lotz et al.
patent: 4598594 (1986-07-01), Painley
Onoda Hajime
Sato Wataru
Goldstein Herbert
Kimmon Manufacturing Co., Ltd.
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