Induction Coil Page: 3 of 4
[1], 3 p. : ill. ; 23 cm.View a full description of this patent.
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787,658
Like characters of reference designate cor- about a core in successive convolutions, insu- 65
responding parts throughout the various d raw- latingo material d isposed between the con vo-
ings. lutions and all disposed in the form of a disk
In the preferred embodiment of the pres- with its axis parallel with the plane of the
5 ent invention a core is formed by wrapping strip and having a secondary winding upon
a casing 1 of soft iron about a plurality of each side thereof andadjacentthereto,thenum- 7c
longitudinally-disposed line soft-iron wires 2. ber of secondary windings exceeding the pri-
Upon the core so formed are placed a plu- mary windings by one and occupying each end
rality of disks 3, composed of mica or any of the completed coil.
To suitable insulating material. The disks are 3. An induction-coil comprising a core, in-
properly spaced, and in the middle space is sulating-disks disposed upon the core perpen- 75
wound a strip 4 of material of low electrical dicular thereto, a primary coil composed of
resistance, approximating in width the (is- a broad strip of metal wound in successive
stance between the insulating-disks. Between convolutions about the core filling the space
i5 each of the several convolutions of the con- between two insulating-disks and having its
ductor 4 is disposed a strip of insulating ma- plane parallel with and presenting but a single 8o
aerial 5 and the winding of the conductor }winding longitudinal of the core, insulating
and insulator continued until the disk is material disposed between the convolutions, a
formed, as shown in Fig. 2, approximating secondary circuit composed of insulated wire
20 in size insulating-disks 3. The inner termi- wound about the core and filling the space be-
nal of the conductor 4 is turned at the core tween two insulating-disks upon each side of 85
at right angles thereto, as shown at 6, for the the primary coil and occupying the ends of
purpose of making connection with a source the coil and means for electrically connecting
of electrical energy. Between the upstand- the secondary winding.
25 ing inner terminal 6 and the coil is disposed 4. An induction-coil having a core composed
insulation 7. Within each alternate space of fine soft-iron wires, incased within a soft- 90
between the disks 3 is wound a. similar strip iron cylinder in combination with insulating-
4, which when electrically connected consti- I disks disposed upon the core with their planes
tutes the primary winding. Within the spaces perpendicular to the axis of said core, a pri-
30 between the primary coils is wound the usual mary coil composed of a broad strip of metal
insulated wire used in secondary winding, wound in successive convolutions filling the 95
The number of secondary coils exceeds the space between two insulating-disks and hav-
number of primary coils by one, thus occu- ing its plane parallel with and presenting but
pying the extremes of the completed coil. a single winding longitudinal of the axis of
35 The end insulating-disks 8 are made smaller the core, insulating material disposed be-
in diameter than the disks 3, and the end see- tween the convolutions, a secondary circuit 100
ondary coils are tapered to correspond, thus composed of insulated wire wound and filling
being confined within the field of maximum the space between two insulating-disks upon
magnetic intensity. each side of and adjacent to the primary coil
40 The core 1 is extended at each end beyond and electrically connected, the said core hav-
the extreme secondary coils, thus intercept- ing its ends projected beyond each end of the 105
ing the lines of magnetic force lying within coil.
the ends of the magnetic ellipse. 5. An induction-coil comprising alternate
It is evident that both the primary and sec- primary and secondary windings divided into
45 ondary coils may be connected in series, as sections longitudinal of the core, separated by
shown at Fig. 4, or in multiple, as shown in and filling the spaces between insulating-disks 110
Fig. 5; but as this coil is designed to produce perpendicular to and embracing the core, and
induced currents of very high potential and as having the extreme secondary sections ta-
the resistance of the secondary circuit has been pered at their outer ends.
50 reduced to a minimum I prefer to connect 6. An induction-coil comprising alternate
them in series. primary and secondary windings divided into 115
Having thus described my invention, what sections longitudinal of the core separated by
I claim as novel, and desire to secure by Let- and filling the spaces between insulating-disks
terms Patent, is- perpendicular to and embracing the core, the
55 1. In an induction-coil, a primary winding number of sections of secondary windings ex-
composed of a broad strip of metal disposed ceeding the primary sections by one, the ex- i120
with its plane parallel with the axis of the core treme secondary sections being tapered at their
and having a secondary winding upon each outer ends and a core composed of soft-iron
side thereof and adjacent thereto, the number wires projected beyond each end of the coil.
6o of secondary findings exceeding the primary 7. An induction-coil col p rising insulating-
windings by one and occupying the extremes disks disposed upon and embracing the core f25
of the coil. with their planes perpendicular to the axis
2. In an induction-coil,' a primary winding thereof, a primary coil composed of a ribbon
composed of a broad strip of metal woundI of metal with its plane parallel with and wound0
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Baker, John A. Induction Coil, patent, April 18, 1905; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth511104/m1/3/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.