Fred Locke's boro-silicon glass patent

Boro-Silicon Glass

Fred M. Locke of Victor, N. Y., in patent No. 1,233,486, discloses an improvement on his boro-silicon glass, useful for high-tension insulators. The primary object of the invention is to produce an electrical insulator particularly adapted for conductors of high potential without the fusing temperature of the mass being raised to such an extent as to preclude economical production.

The following percentages of the mix are suggested:

Among other things it has been discovered that the addition of a nitrate - as, for instance, nitrate of an alkali such as potassium nitrate or sodium nitrate - to the mix in manufacturing the insulator results in the production of a substantially pure-white transparent glass at lower fusion temperature.