Thermocouple Electric Motors

I came across this reference, but it's a bit of a hassle to obtain a free 
copy of the full text:

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Thermocouple Electric Motors

J. E. CRAWFORD STRINGER

Lincluden, Preston Park, North ****elds, Northumberland.

FURTHER to the recent publications1,2 on the subject of electrostatic
motors 
running at high voltage and low current, I gave consideration to design 
possibilities of a thermocouple-driven motor operating at a few mV. but a 
heavy current.

Nature 195, 988 - 989 (08 September 1962); doi:10.1038/195988b0
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Does anyone know what the idea was, and whether it got anywhere?

Regards