Shaft Rotary

What is the patent number, for the rotary, three-phase, mechanical, power inverter, issued in 1962 ?
I am calling this device a rotary inverter, because it is a mechanical switch, comprised of three slip rings, and a commutator, mounted on a common shaft. It is not an integrated, or discreet, motor-generator. The output is square-wave.
I know the patent exists. I once examined, a paper copy of the patent. However, I can't seem to find it online.
Here are the two i found, hope this helps.
COMBINED ELECTROMAGNETIC AND ELECTRO-MECHANICAL POWER CONVERTER H. SIXSMITH
View patent at USPTO Abstract | Drawing | Description | Claims
Patent number: 3224818
Filing date: Dec 10, 1962
Issue date: Dec 1965
Inventor: H. SIXSMITH
Assignee: the United 5 States of America as represented by the Secretary of Commerce 3
http://www.google.com/patents?id=MtFIAAAAEBAJ&dq=mechanical+power+inverter+issued+in+1962
BRUSHLESS ROTARY INVERTER Shafranek et al.
Read this patent
Download PDF
View patent at USPTO Abstract | Drawing | Description | Claims
Patent number: 3223916
Filing date: Feb 5, 1962
Issue date: Dec 1965
Inventor: Shafranek et al.
http://www.google.com/patents?id=HgN0AAAAEBAJ&dq=rotary,+three-phase,+mechanical,+power+inverter+1962
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