Society of Glass Technology · [Sheffield] · leaf 623
traceable to dirty contacts.In performance, the furnace was similar to the one run or directcurrent. At 1400°, the temperature might fall as much as 10° perday. This fall seemed to be due to changes either in the heatingelement or in furnace insulation. The same regulator was suitablefor use with… … Fig. 124: half of Fig. 124. The wires, 17, the number and size of whichdepended on the current to be carried, are wound round andsoldered to two cross arms, 1G, which in turn are fastened to the DECORATED CLASS. 179 jaws of a phosphor-bronze spring clip, 15, so that the wires, 17,bear on the…
Glass
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten07unit-201-149.webp)
