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Show Device Gives Protection Against Auto Thieves Nothing Is more disconcerting to an auto thief than a noise which will cal attention to his activities, and so the simple wiring scheme shown In the Illustration should prove quite effective effec-tive while the car is left In a well-populated well-populated district. All you need Is a single pole, single throw knife switch and a few feet of wire. The knife switch should be concealed at any convenient point behind the ln- SMAtt KNIFE SWITCH CONCEALED ON BACK OF INSTRUMENT BOARD ya) caiT0 tjNrric ""- SW ITCH WIRE TO HORN Turning on Ignition Switch Starts the Horn Sounding Continuously, Foiling the Automobile Thief. strument board. Connect one terminal termi-nal of the switch to the binding post on the ignition switch, or to the wire that runs from the ignition switch to the spark coil, at any convenient point Connect the remaining terminal termi-nal of the switch to the binding post on the horn that is wired to the horn button, or to the wire Itself if that Is easier. When the switch is closed, turning on the ignition will cause the horn to sound. Popular Science Monthly. |