Type B (1904 to 1906) Previous
Back
Up
Up
Next
Next
 
This meter was a complete redesign from the previous Round Type and Type A meters. The most important change was a redesigned stator that eliminated the reactance coil from the voltage circuit. This new design also allowed more room for the current coil, allowing heavier wire to be used which in turn increased its overload capacity. The new stator design also made it possible to use a separate frame to support all the internal components instead of bolting everything to the base. The register also got 2 important changes - one was rearrange the dials into a straight line (dropping the fastest dial and therefore registering in kilowatthours) for ease in reading. The other was partly because of the introduction of the internal frame - the upper end of the disk and the register were now supported separately instead of as an unit, making maintenance easier. The disk assembly is also larger (possibly due to higher torque of the new stator with its basic constant of 1/3 instead of 1/6) and is embossed with an arrow pattern for rigidity. In addition to redesigning the case to eliminate provisions for the reactance coil and simplifying the support for internal components, the terminal chamber was also improved. Besides changing to 4-terminal construction, the terminals were now supported with bushings on one end and a piece of insulating board on the other so damaged terminals could be replaced individually (the Round's and A's terminal chamber have the terminals cast into place with cement). This model can easily be told apart from the more easily found (but still scarce) Type C by the fact the metal cover is cast and that screws are used to fasten the covers to the base.
 
Type B, glass cover
Westinghouse Handbook on Watthour Meters
Type B, metal cover
Phil Shelley