Abstract

A machine is described for dividing up radon-charged glass capillaries into small lengths called `seeds'. It is electrically controlled and is very efficient Compared with the normal method of dividing the capillaries by hand the results are far superior, and at the same time exposure to irradiation is reduced. The capillary is gripped by two pairs of jaws mounted on sliding carriers, and the glass is fused at the required point by a small platinum filament which is heated electrically to incandescence. The carriers then move apart, thereby separating the two sections of the capillary.

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