P.W.M.  SPEED MOTOR SOLID  STATE CONTROLLER 

In this picture a I am showing the  wide pulse modulation device per power solid controller for single fase  electric motor. for 110 120  VAC 60 Hz.

general view device

In this picture show the potenciometer details, this a principal handle device for speed regulator.

show  mounting of tirystor

Note: In  near future I will be plubishing the electronic diagram