form of the device, ally registers the amounts weighed. It is shown asap- of short iron rods and surrounded by oblong bobbins. another style having two arms and a bracket with eyes By means of this construction a powerful magnetic plied to a spring scale of any approved construction, although it… … not to register the loads weighed, the rack is thrown the carbon rods in the carbon bars carried by the dia- AN ADJUSTABLE ELECTRIC LAMP HOLDER. phragm, causes pulsations which are reproduced in the receiver. to slip over a three-quarter inch iron pipe, the curved In Figs. 4 and 5 are shown two…
Internet Archive · Public domain (published before 1931). Free to use for anything.