Fluid meter

• US 3,342,070 A
• Filed: 10/01/1964
• Issued: 09/19/1967
• Est. Priority Date: 10/01/1964
• Status: Expired due to Term

• Current Assignee: Leo M. Walch Jr
• Original Assignee: Leo M. Walch Jr
• Inventors: Walch, Leo M. Jr.
• Application Number:
  US04/400,727
• Time in Patent Office: 1,083 Days
• US Class Current: 73/861.78
• CPC Class Codes: G01F 1/115 with magnetic or electromagnetic coupling to the indicating device
• CPC Class Codes: G01P 3/481 of pulse signals

Claims

1. IN A FLUID METER, A HOUSING HAVING INLET AND OUTLET OPENINGS, A ROTOR ROTATABLY SUPPORTED IN SAID HOUSING TO BE DRIVEN BY FLUID FLOW THERETHROUGH, AND MEANS FOR PRODUCING AN ELECTRICAL SIGNAL REPRESENTATIVE OF THE ROTOR VELOCITY COMPRISING A FIXED NON-PERMANENTLY MAGNETIZABLE TOROIDAL CORE HAVING A LONGITUDINAL AXIS OF RESOLUTION NORMALLY INTERSECTED BY A PLANE CONTAINING THE ROTOR ROTATIONAL AXIS, A DETECTING WINDING WOUND AROUND SAID CORE, A CURRENT ENERGIZED EXCITING WINDING WOUND AROUND SAID CORE FOR INDUCING A VOLTAGE SIGNAL IN SAID DETECTING WINDING, AND AT LEAST ONE PERMANENT MAGNET CARRIED BY SAID ROTOR FOR ROTATION IN A CIRCULAR PATH COAXIALLY SURROUNDING THE ROTOR ROTATIONAL AXIS, SAID MAGNET BEING AXIALLY POLARIZED ALONG AN AXIS THAT (A) IS NORMALLY INTERSECTED BY A PLANE CONTAINING THE ROTOR ROTATIONAL AXIS AND (B) IS CONTAINED IN A PLANE EXTENDING PARALLEL TO THE LONGITUDINAL AXIS OF SAID CORE FOR PERIODICALLY SUPPRESSING SAID VOLTAGE SIGNAL BY SUBSTANTIALLY SATURATING SAID CORE WITH FLUX.