Fred Locke patents new glass formula for insulators

[Trade Journal]

Publication: The Glassworker

Pittsburgh, PA, United States
vol. 44, no. 6, p. 16, col. 1


A glass which has very high insulating qualities, low coefficient of expansion, and great stability has been patented by Fred M. Locke, of Victor, N. Y. The composition of the glass is as follows:

SiO2, 78.73%; Na2O; 4.24%.

CaO, 1.33%; K2O; 0.62%.

Al2O3 and Mn trace.

FeO, 0.86%; B2O3; 14.22%.

Mg trace

The expansion coefficient of the glass is approximately 0.0000032. (1,510,521, Oct. 7, 1924).


Keywords:Fred Locke : Glass
Researcher notes: 
Supplemental information: Patent: 1,510,521
Researcher:Bob Stahr
Date completed:August 22, 2007 by: Elton Gish;