[Electric engineering.] . tin-guishes the gas. 63. The automatic burner is shown in Fig. 31 withthe cover removed. Two wires must be provided, runningfrom a double push button, one of them leading to the wire aand the other to b. The circuit from a is through the left-hand magnet coil c to theinsulated band d, whichhas a projection e at oneside. Upon this rests ametal rod r, bent at theupper end and termina-ting in a contact piece; atthe lower end the rod isgrounded by connectionwith the frame f. Eachmagnet coil has an arma-ture g or g Avith a pro-jecting finger on the innerside. When current
[Electric engineering.] . tin-guishes the gas. 63. The automatic burner is shown in Fig. 31 withthe cover removed. Two wires must be provided, runningfrom a double push button, one of them leading to the wire aand the other to b. The circuit from a is through the left-hand magnet coil c to theinsulated band d, whichhas a projection e at oneside. Upon this rests ametal rod r, bent at theupper end and termina-ting in a contact piece; atthe lower end the rod isgrounded by connectionwith the frame f. Eachmagnet coil has an arma-ture g or g Avith a pro-jecting finger on the innerside. When current is sentthrough the magnet c, thearmature g is raised andturns the gas valve v bystriking one of the the same time the rod r is pushed up, thus breaking the circuit at a point where thegas is escaping and producing a spark that will ignite provide for certain action, the sparking should continuelater than the instant of turning on the gas, and this iseffected by the use of a spring to restore the circuit. The. Fig. .31. 28 INTERIOR WIRING. 45 rod r is forced upwards against the spring s, but when thecircuit is opened at the spark gap, the spring presses therod and armature down again, and being therebyclosed, a spark is again produced on opening. This continuesas long as the push button is pressed, the action being simi-lar to that of an electric bell. The second coil h is groundedat the inner end, and when a current is sent through, thearmature g is raised, turning the valve and cutting off thesupply of gas. Automatic burners are very convenientwhere it is wished to light or extinguish a gas jet from somedistant point. They are used principally in hallways whereit is desired to light or extinguish the gas from any floor. ARRANGEMENT OE LIGHTING APPARATUS. 64. To light gas by electricity, a spark of considerableintensity must be produced. This can be done by means ofbatteries and induction coils or byan electrostatic discharger. Forthe parallel system u
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