US1220166A - Variable magnetic-opposed reaction-coil electric circuit. - Google Patents

Description

I. E. ASKE. VARIABLE MAGNETIC OPPOSED REACTION COIL ELECTRIC CIRCUIT.

APPLICATION FILED JUNE II, I915- Patented Mar. 27,1917.

MAG/ 5m Irv-" 10 M m 2.; ATTORNEY IRVING IE. ASKE, OF DULUTH, MINNESOTA, ASSIGNOR T0 ASKE nuroivrnrrcfvonrlton REGULATOR COMPANY, A CORPORATION OF DELAWARE. I

VARIABLE MAGNETIC-OPPOSED REACTION-COIL ELECTRIC CIRCUIT.

Specification of Letters Patent.

Patented Mar. 2'7,

Application filed .Tune 11, 1915. Serial No. 33,511.

To all whom it may concern:

Be it known that I, IRVING E. AsKn, a citizen of the United States, residing at Duluth, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements in Variable Magnetic- Opposed Reaction-Coil Electric Circuits, of which I do hereby declare the following to be a specification.

My invention relates to variable magneticopposed reaction-coil electric circuits and has for its object the provision of means for electrically operating a plurality of mecha nisms or translation devices simultaneously or any of them separately in which operating means the current flow to each such mechanism will be automatically controlled or governed.

Under the former system of magneto elec tric lighting of certain automobile head lights, a great range of voltage variation existed, extending from 6 to 18 volts, which necessitated the use of high voltage lamps in parallel operation, or of low voltage lamps connected in series. In both these systems the efliciency of the lamps is very low when the magneto is running slow. This is a very undesirable condition, since it is when the vehicle is running slow as over bad roads that the greatest amount of light is needed. An-

other disadvantage of series lighting is that when one lamp goes out, the whole series is extinguished. By employing my invention both these disadvantages may be avoided. By connecting low voltage lamps in parallel in accordance with my invention for controlling them a nearly constant intensity of light can be maintained.

In the drawings Figure 1 is a diagrammatic view of one form of my said invention. Fig. 2, is a. perspective view of the preferred form of a reactance coil and core forming part of my said invention. Fig. 3, is a plan view of the top plate forming part of sa d core. Fig. 4 is a plan view of an 1ntermed1- ate plate forming part of said core and Fig.

'5 is a diagrammatic view of a modified form of my said invention.

Referring to the drawings, my -1I1V6I1t1QD.

embodies a suitable, source of electricity as a magneto 1; a magnet core A, preferably composed of a plurality of superposed plates as 2, 2 insulated from each other by any suitable interposed insulating material as at 2 an electric conductor 3 connected at-one terminal with one of the poles of said source of electricity and preferably wound in a continuous direction of rotation intwoelectrically serial, mechanically parallel coils as 3, 3, upon said core, the opposite end of said conductor being electrically connected of each of said translation devices as at 7, 7 7. The turns of the core windings in each coil are insulated from each other-and from the core in any suitable manner, or by any suitable insulating material. The several plates embodied in said preferred, form of core, are preferably stamped fronrthin soft iron sheets, the top and bottom plates preferably extending at the corners slightly beyond the intermediate plates to form: lips for engaging the clamping bolts 8 by which the pile of plates is held together ,so as to form a unitary structure. Each of said plates has formed therein a central aperture 9 for the passage of one side of each of said coils. Upon one of the walls of said core one of said coils is wound, and upon the opposite wall of said core theother of said coils is preferably wound, a greater number, preferably twice as many turns of wire or conductor preferably being given to the coil 3 than to the coil 3 The top and bottom plates are preferably provided with ears, as 10 by means of which the core may be secured to a suitable support. If desired, the

two coils may within the scope of my inven tion and of certain of my claims be. concentrically wound in opposite directions upon one wall of said core as shown in Fig. 5, with approximately the same result as if respectively wound in the same direction of rotation on different walls of said core.

The operation of my invention depends on an alternating current of electricity, and on a variable magnetic field density produced in said core by a varying electric current traveling through the first coil 3*. At the point of junction of the conductor 3 and the branch conductor 5, the current divides, part of it flowing to the mechanism or lamp 4, and part of it flowing to the mechanism or lamp 6, the amount of current flowing through the coil 3- being the sum of the amount flowing through the lamps i and 6. The winding of both coils in the same direction of rotation on opposite walls of said core, or in opposite directions on one of said walls, produces in the core magnetic poles of like polarity. In operating electric lights in parallel by an alternating current, it was, prior .to my invention often found impossible to operate the lights independently of each other, since when one lamp was extinguished the voltage increased, causing said other to burn out. To avoid this condition and to secure the maintenance of an approximately constant voltage at .the lamps, whether one or more of the lamps is in operation, is one of the objects of my invention. In my invention, the magnetic flux generated by one coil is, when current is flowing through both coils, opposed by the flux generated by the other coil, thus causing the magnetic fluxof both coils to thread or flow through the central aperture 9, and through the surrounding air medium. The choking eflect of either coil is then substantially neutralized by that of the other. VVhenfone lamp is extinguished the voltage increases and tends to force a greater current through the other lamp, to

prevent which a percentage of unneutralized flux is required.

If the lamp 4 should be extinguished, the magnetic opposition previously produced by the current flowing through coil 3 will cease, and as a result the magnetic flux produced by coil 3* will thread or flow through the iron core which has a lower reluctance than the air medium through which it previously flowed.- Thus the magnetic flux will flow in greater strength or volume (even though the ampere turns of the coil 3? are less than when carrying current for the coil 3 and will cause a greater choking eflect in the coil 3*, therefore, and because the flux is not neutralized by opposing flux, the

higher voltage is prevented from forcing an excessive current through the coil 3 and lamp 6.. If, on the other hand, the lamp 6 mamas is extinguished and the lamp 4 continues in circuit, said lamp 4 will continue to burn approximately as when both lamps were in circuit; because although there is then mag netic. oppositionbetween the coils, the flux produced by the coil 3 is only one half its former-value, in opposition to the flux generated by coil 3"; thus the excess or unn'eutralizedr flux operates to choke the excessive Having now described my invention, whatv I claim is 7 1. The combination of a source of alternating electric current, a reactagnce coil comprising a core having two legs connected to each other at each end to form a magnetic circuit, each leg having a coil wound thereon, said coils being wound in the same direction of rotation and connected to each other in series, said coils being connected at one end to one of the poles of said source, a translation device connected at one side with the opposite end of said coils, and a translation device connected at one side to said coils intermediate of theends thereof, the opposite side of each of said translation devices being electrically connected with the opposite pole of said source.

2. The combination of a source of alternating electric current, two reactance coils connected to each other in series, a core for each of said coils, said cores being laminated and connected together at each end to form a magnetic circuit, said coils being wound upon said cores in'such manner as to produce in both of said cores poles of like polarity, the free end of one of said coils being connected to one pole of said source, a translatioh device connected at one side to the free end of the other of said coils, and a translation device connected at one-side to said first coil at a point near the junction of and adapted to form a magnetic circuit, said core including two legs, one of said coils be 'ing wound upon one of said legs and the other of said coils being wound upon the other of said legs so as to produce poles of like polarity in both of said legs when both of said coils are charged, a translation device adapted to receive electric current In testimony whereof, I hereunto afiix my through only the first coil of said series, a signature, in presence of two witnesses. translation device adapted to receive electric current through both of said coils the sec- I ASKE' 0nd of said coils having a greater number of Witnesses: turns of the electric conductor than the first GvoN SUccoMmH of said coils. ISAAC N. POWER.

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