Page:United States patent 647007.pdf/4

Figure in drawings.	Diameter of tube G, in centimeters.	Diameter of wires, in cen- timeters.		Resistance in ohms.		Number of turns in windings.		Length in centimeters.
		Pri- mary.	Second- ary.	Pri- mary.	Second- ary.	Primary.	Secondary.
Fig. 3	.887	.011	.011	4.8	0.1	. . . . .do. . . . . . .	2 sections of 15 layers each with 150 60 63 50 50 40 40 35 35 38 38 30 30 27 27 24 21 23 22 17 18 15 15 10 10 6 6 2 2 turns.	2.5
Fig. 4	.175	.012	.012	. . . . .	. . . . .	2 layers of 110 each, in parallel. . . . .	12 layers of 110 80 75 60 50 45 40 28 20 15 10 5 turns.	1.8
Fig. 5	.075	.012	.012	. . . . .	. . . . .	4 layers 80 turns, ${\displaystyle \scriptstyle {\left.{\begin{matrix}\ \\\\\ \ \end{matrix}}\right\}\,}}$in series 78 turns, 76 turns, ${\displaystyle \scriptstyle {\left.{\begin{matrix}\ \\\\\ \ \end{matrix}}\right\}\,}}$in series 72 turns,	10 layers of 60 54 40 42 40 36 32 29 26 23 20 18 14 12 9 7 turns.	1.5
Fig. 6	.975	.012	.012	5.75	28.5	1 layer of 2 wires in parallel, with 160 turns each wound tandem.	3 layers of 910, 45, 45 turns . . . . . . .	5.8

The coils are wound in the following manner: In Fig. 1, G is a glass tube, and on it is wound the primary in two layers, there being one hundred and sixty turns in each layer. The ends of these two coils or layers are connected in parallel one to the aerial conductor and the other to earth. On the outer coil of the primary is wound the first or inner coil of the secondary, which is continuous and has one hundred and fifty turns. The left-hand end of the wire forming this layer is then wound or coiled upon it to form the second layer of the left-hand section of the secondary, forty-five turns being given. On this comes the third layer with forty turns, and the other layers with thirty-five, thirty, twenty-five, twenty, fifteen, twelve, and five turns, respectively, follow. After winding the outer layer (that with five turns) of the left-hand section of the secondary the wire is led down and coiled on the middle of the first or inner layer of the secondary, so as to form the middle section of the secondary, forty turns being given, and then follow layers with thirty-nine, thirty-seven, thirty-five, thirty-three, twenty-nine, twenty-five, twenty-one, fifteen, ten, and five turns, respectively, the wire from the outer, layer (that with five turns) being connected to the left-hand side of the condenser c and the left-hand choking-coil k. The right-hand end of the wire forming the inner layer of the secondary is wound on the right-hand end of that layer, forty-five turns being given, and then follow layers with forty, thirty-five, thirty, twenty-five, twenty, fifteen, seventeen, and fourteen turns, respectively, so forming the right-hand section of the secondary, the wire from the outer layer (that with fourteen turns) being connected directly to the left-hand end of the sensitive tube j.

In Fig. 2, G is a glass tube, and on it is wound the primary in two layers, there being one hundred and sixty turns in each layer. The ends of these two coils or layers are connected in parallel one to the aerial conductor and the other to earth. On the outer coil of the primary is wound the first or inner coil of the secondary, which is in three sections, the middle one having eighty turns. The other layers of the secondary are in four sections, the two middle ones being formed by