Rotating disc multielement polyphase meter

A polyphase watthour meter for measuring electrical power consumption for an electrical circuit, a base plate having an inner concave surface;

• a supporting frame member comprising a casting of non-magnetic, electroconductive material;
• said casting having a generally disc-shaped body portion extending parallel to said base plate and including a first concave surface disposed adjacent to said concave surface of said base plate and cooperating therewith to define a cavity, and a second surface facing the frontof said meter;
• first fastener means for securing said supporting frame to said base plate;
• first and second electromagnetic means each having an air gap, said first and second electromagnetic means each having a longitudinal axis;
• said casting providing first spacer means extending toward said base plate, second spacer means extending from said second surface thereof toward the front of said meter, third spacer means extending from said second surface thereof and located outside said second spacer means, a pair of diametrically spaced projections on said second surface, and a housing on said second surface;
• second fastener means for mounting said first electromagnetic means to said first spacer means and in said cavity;
• third fastener means for mounting said second electromagnetic means to said second spacer means with the longitudinal axes of said first and second electromagnetic means located respectively in first and second parallel spaced planes which extend parallel to said base plate with associated air gaps in alignment in a third plane which extends perpendicular to said first and second planes;
• a shaft rotatably mounted to said projections on said frame casting;
• an electroconductive disc mounted on said shaft for rotation about an axis extending substantially perpendicular to said third plane and through the aligned air gaps;
• winding means for each of said electromagnetic means effective when energized to establish a shifting magnetic field in the associated air gap to apply a torque to said disc for rotating said disc in correspondence with power consumption by said circuit;
• damper magnet means mounted in said housing of said frame casting;
• a register;
• fourth fastener means for securing said register to said third spacer means of said frame casting in a forward portion of the meter;
• and a coupling gear box assembly mounted on said frame casting in operative relationship with said register for coupling said shaft to said register to permit said register to be driven in correspondence with the revolutions of said disc.