Rotor shaft bearing for an electric motor

Claim 1

IN AN ELECTRIC MOTOR, THE COMBINATION OF A ROTOR, A FIXED SHAFT HAVING BEARING SUPPORT FOR SAID ROTOR, A STATOR, A SHAFT-MOUNTING BRACKET CONNECTED WITH THE STATOR AND HAVING AN APERTURE, SAID BRACKET BEING PROVIDED AT A PLURALITY OF POINTS ABOVE SAID APERTURE WITH CHANNELS DEFINED BY SURFACE CONVERGING TOWARD THE CENTER OF THE APPERTURE, SAID SHAFT HAVING A PORTION IN THE APERTURE AND FREE OF DIRECT CONNECTION WITH THE BRACKET, AND A CAST INSERT IN WHICH SAID SHAFT PORTION IS EMBEDDED AND WHICH SUBSTANTIALLY FILLS THE APERTURE OF THE BRACKET AND HAS PORTIONS IN SAID CHANNELS WEDGED BETWEEN SAID CONVERGING SURFACES WHEREBY SAID INSERT IS ACCURATELY CENTERED AND IS IN MECHANICAL UNFUSED INTERLOCKED CONNECTION WITH THE BRACKET, THE SAID WEDGING OF PORTIONS OF THE CAST INSERT BETWEEN THE CONVERGING SURFACES AFORESAID BEING DUE TO SHRINKAGE OF THE CAST INSERT, BY WHICH SHRINKAGE THE CAST INSERT IS SLIGHTLY WITHDRAWN FROM THE BRACKET SURFACES AT THE BOTTOMS OF SAID CHANNELS, THE LACK OF FUSION AT THE JUNCTURE BETWEEN THE BRACKET AND THE CAST INSERT PROVIDING A BARRIER AGAINST SOUND CONDUCTION.