Identifying electrical insulation material

Alan J. Hawk <alan.hawk [at] us__army__mil> writes

>I have an X-ray machine that dates to about 1917.  There is a metal
>bar that carries electricity from the high voltage transformer coil
>to the X-ray tube.  The insulation material appears to be multiple
>layers of cellophane.  It is a thin clear plastic.
>
>Any experts on early twentieth century electronics able to identify
>the material used for insulation?

Sounds like mica to me.

Jack


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                  Conservation DistList Instance 21:16
                   Distributed: Friday, July 13, 2007
                       Message Id: cdl-21-16-004
                                  ***