Harper's boating book for boys; a guide to motor boating, sailing, canoeing and rowing . ough a different post. From this outlet the secondwire goes to the arm which causes the make-and-breakspark; but at a convenient spot this wire should be cutand the ends attached to a switch, so that the current canbe cut off when not in use. (Fig. 4.) In the case of a jump-spark motor the batteries arewired together just the same, but the induction-coil is dif-ferent. It has a vibrator, or buzzer, as some call it,on one end, and it has another post to take a third wire. One wire, called the ground wire, l
Harper's boating book for boys; a guide to motor boating, sailing, canoeing and rowing . ough a different post. From this outlet the secondwire goes to the arm which causes the make-and-breakspark; but at a convenient spot this wire should be cutand the ends attached to a switch, so that the current canbe cut off when not in use. (Fig. 4.) In the case of a jump-spark motor the batteries arewired together just the same, but the induction-coil is dif-ferent. It has a vibrator, or buzzer, as some call it,on one end, and it has another post to take a third wire. One wire, called the ground wire, leads from the sidepost of the dry cell to a screw on the handle of the timer-lever. A switch to throw off the current should be putsomewhere along this wire. The other wire, from thecenter post of the cells, leads to a screw at one end of thecoil-box. From the other screw on the same end of thecoil a wire should be run to the screw on the side of thetimer-box. These primary wires are the usual small in-sulated wires, but a larger, heavy secondary wire should 267 BOATING BOOK FOR BOYS. Fig. 2
Size: 1201px × 2081px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidharpersboati, bookyear1912
