Flow meter

• US 4,140,013 A
• Filed: 02/24/1977
• Issued: 02/20/1979
• Est. Priority Date: 03/01/1976
• Status: Expired due to Term

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Hunger, Erhard
• Primary Examiner(s): Goldstein, Herbert
• Application Number:
  US05/771,758
• Time in Patent Office: 726 Days
• Field of Search: 73/229, 73/231 R, 73/231 M, 73/253, 73/258, 73/197, 324/173, 324/174
• US Class Current: 73/861.77
• CPC Class Codes: B67D 7/222 involving digital counting
• CPC Class Codes: B67D 7/425 including components powered by electricity or light
• CPC Class Codes: G01F 1/075 with magnetic or electromagnetic coupling to the indicating device
• CPC Class Codes: G01F 15/066 involving magnetic transmission devices
• CPC Class Codes: G01F 15/068 with electrical means G01F15/063 takes precedence

Abstract

A flow meter for metering the flow of gaseous or liquid media comprising a rotatably movable measuring organ, a measured-value pickup device for obtaining an electrical quantity corresponding to the revolutions of the measuring organ, and an evaluating device connected to the measured-value pickup device. In accordance with the invention, the flow meter is further provided with a voltage generator responsive to the measuring organ and with a means for coupling the output voltage of the generator via an electrical buffer device to the measured-value pickup device and/or the evaluating device.

Claims

1. In a flow meter for metering the flow of a medium, said flow meter comprising a chamber in which is disposed at least one rotatably moveable measuring organ, a measured value pickup device for deriving an electrical quantity corresponding to the revolutions of said measuring organ, and an evaluating device responsive to the pickup device, the improvement comprising:

(a) a voltage generator separate from said pickup device and connected in driving relationship with said measuring organ, said generator comprising a magnetic coupling responsive to said measuring organ for providing an indication of the rotary movement of said measuring organ and a winding arrangement disposed adjacent said magnetic coupling providing an output voltage; and

(b) means responsive to the output voltage of said winding arrangement for supplying power to one of said pickup device and said evaluating device.

2. A flow meter in accordance with claim 1 wherein:

said magnetic coupling includes separated half portions;

and said winding arrangement is fixedly arranged between said half portions.

3. A flow meter in accordance with claim 1 wherein:

said winding arrangement is a printed circuit.

4. A flow meter in accordance with claim 1 wherein:

said electrical evaluating device comprises;

an electronic counting chain including a number of connected electrical building blocks; and

a display device.