Integral flux lagging and light load adjustment assembly for watthour meters

Claim 1

An induction watthour meter including an electromagnet assembly with voltage and current magnetic sections and a rotatable disc driven at a rate responsive to voltage and current magnetic fluxes directed from the magnetic sections into said disc, wherein said voltage magnetic section comprises: a voltage magnetic core including a main pole terminating at a main pole face and two adjacent flux return poles terminating at coplanar auxiliary pole faces on opposite sides of said main pole face; a one piece electroconductive bracket and lag loop member having a platform carrying two mounting tabs at one side thereof fixedly attached to said flux return poles, said one piece member further having a continuous current conducting loop portion including an inverted U-shaped extension projecting from said one side of said platform and around said main pole face for producing a predetermined phase lagging effect in a working voltage magnetic flux component directed from said main pole face and into said disc; magnetic means extending over said auxiliary pole faces in substantially coplanar relationship with said inverted U-shaped extension and being slidably mounted on a bottom surface of said platform, said magnetic means being movable within a secondary voltage magnetic flux component extending between said disc and said coplanar auxiliary pole faces for varying the increasing and decreasing disc torque producing effects of the secondary voltage flux component; and manual operator means mounted on the top surface of said platform and being connected to said magnetic means for varying a light load adjustment position of said magnetic means.