This automatic, Fig. 19, consists of two iron-clad magnets, placed one above the other, between which is located a gas valve. Through an extension of the latter a pin is driven, one end acted upon by the upper armature to open the valve and ignite the gas, the other by the lower armature which serves to close the valve and extinguish the flame. Around the burner is placed a porcelain candle slip of 3/4-inch diameter and from 4-3/4 inches in length upwards.
CHAPTER III.
Connections and Wiring.
Fig. 20 shows how to connect up an automatic burner with two pushes; thus one can be downstairs in the hall and the other upstairs, allowing one to either extinguish or light the gas from either place. The value of this arrangement is obvious; it allows one to light up the hall before descending at night, or to put out the gas after one is safely upstairs. Again, an automatic burner can be put in the cellar and lighted and extinguished from the head of the cellar-stairs, saving matches and danger of fire.
Fig. 21 shows the connections of one automatic burner and two pendant or rachet burners. P P are the pendent burners, A the automatic burner, C the primary coil, S the buttons which control the automatic burner, M M M the cells of battery, of which there should be at least four, if not six. A low-resistance cell must be used here, as before mentioned, one that gives not less than 5 amperes on short circuit. It will be seen here that one side of the battery is connected to ground (or gas pipe), the circuit being completed owing to the burners being themselves screwed into the gas pipe. Care must be taken, however, to first see that no insulating bushings have been used at the gas fixtures, as is done in wiring for electric light. In this case a double circuit will have to be run.
Fig. 20.
Fig. 21.