US1499931A - Induction or ignition coil - Google Patents

Description

July l, 1924. 1,499,931

E. B. JAcoBsoN INDUCTION ORl IGNITION COIL Filed April l5, 1922 imA am l INVENTOR. Edward B Jacosa?.

BY va/vzy/W ATTORNEY Patented July l, 1924.

UNITED STATES EDWARD B. JACOBSON, OF PITTSFIELD, MASSACHUSETTS.

INDUCTION OR IGNITION COIL.

Application filed `April 15, 1922. Serial No. 553,230.

T0 all whom t may concern.

Be it known that I, EDWARD B. JAooBsoN, a citizen of the United States of America, residing at Pittsfield7 in the county of Berkshire andState of Massachusetts, have invented certain new and useful Improvements in Induction or Ignition Coils, of which the following is a specification.

This invention relates to improvements in induction coils.

An object of the invention is to provide an induction or spark coil for use in connection with the ignition system of a motor vehicle, the current from the secondary winding of which is connected to the usual spark plugs of an internal combustion engine.

A further object is to provide an induction coil in which the current produced in the secondary is of greater amperage than in the coils now in use7 whereby a more'eificient ignition of a vaporous charge is produced.

A further object is to provide an induction coil in which the magnetic circuit is more nearly a closed one whereby greater efliciency is produced.

A further object is to so construct and arrange the various elements or parts of the coil in order that itmay be readily taken apart and reassembled, if necessary, for repairs. Y

Further objects and nature of the invention will appear in the body of the specicae tion and will be particularly pointed out in the appended claims.

Referring to the drawings which form a part of the specification.

Fig. 1 is a plan view of the cover plate for closing the upper end of the casing and showing the primary terminals.

Fig. 2 is a vertical sectional view on the line 2 2 of Fig. 1 showing the cups of molded insulation between which the two coils are located, also the manner of securing the bedded within the molded insulation top or.

cover plate. f

Fig, 6 is a detail side elevational and end view respectively of the high tension terminal. Y l

Fig. 7 is a detail end andside elevational view respectively of the interiorly threaded nut which is connected to the tie rod.

Fig. 8 is a detail top plan and side elevational view respectively of the attaching bottom stud for the securing of the coil.

Fig. 9 is a sectional view of the molded insulating top'or cover plate and Fig. 10 is a detail view of one of the discs of magnetic material.

Referring to the drawings in detail:

1 and 2 designate the primary and secondary windings respectively, 3 the usual core of any suitable construction and material as wires of soft or annealed iron. 4@ and 5 are the upper'and lowercup members of molded insulating material and between which the primary and secondary coils 1 and 2 are placed, as shown.' The ends of these coils fit within the depressions 6 and 7 which are formed by the elongated flanges 8. The margins 9 produce the depressions 10, and, molded with and located within each of the depressions 10 are the perforated tubular portions 11 through which passes the two terminals 12 and 13 ofA the primary coil 1.

Located within the depression 10 of each of the cup members 4 and 5 are discs 14 of thin magnetizable material 'having openings 15 to 'receive the tubular portions 11. and a radially arranged opening or slot- 16 which connects at its inner end with the curved seat portion 17 in which is located the tie rod 18. These discs engage or are in direct contact with the opposite ends of the core 3, as shown. A good magnetic contact is therefore produced. 19 designates discs of insulating material which are placed .within each of the depressionsl() and on the outermost one of the metallic discs 14 which compose the core heads.

The core 3, primary and secondary coils 1 and 2, cups 4 and 5, discs 14; and19 are secured together and in place as follows:

The tie rod 18 is threaded as indicated at 2O to receive the interiorly threaded bottom stud 21. The end 21 of this stud engages the lower disc of insulation 19 and forces the metallic discs 14 against the lower end of the core 3 and against the bottom of the recess 10 of the lower cup 5. r1`he opposite or upper end of the rod- 18 is also threaded as indicated at. 22. On thisvrod is placed the loose sleeve or washer 23 which rests on the outer surface of the upper fibre disc 19. Engaging the threads 22 is an internally threaded sleeve er1-11.11.1524; (ses Fig, which formed cap or top piece 26 of molded insulating ma-V with slots 24 to receive a screw driver. ThisV sleeve is located within a second sleeve 25Y (see Fig. 5) which is embedded within the tei'ial, as clearly shown in Figs. and 9. The lower edge 242 engages the inclined annular shoulder 27 of the sleeve 25 and when the sleeve or nut 24 is rotated it will firmly clamp lor draw the two cup shaped members 4 and 5 together, and will also irmly draw the metallic discs 14, which compose the core headV against the,ends of theAcorerB. This operation also irmly connects tthe Vcap or top piece 26 to the tie rod 18.

The piece 25 is formed with anmternally Y formed t-hread 25 for attaching the Vcoil to a support. In the cap piece 26 isembedded the two terminals 28 to which the two ter'- minals 29 ofthe primary coil 1Y are coninected.

30 are theset screws for' connecting the coil lV tov a suitable. source ot electrical energy. Y

The parts of theV coil are enclosed by means of the fibre Vcasing 30 which is preierably'water and oil proof. This casing is attached to the 'base ,piece 31 byrmeans of the pins 32. The piece 31 is secured to the tie rod 18 by means of the stud 21 shown in F ig. 8. 32 is a high tension button terminal to which the cable is connected that conveysl in the use of the two cuprshaped members 4 and 5, and the core heads which are formed of the metallic dises 14.

The cup. members are formed with a centrally disposed opening 4 to receivefthe.

ends of the coreA 3, as shown. VvThat I claim is;` Y

1. In an induction coil, the combination,

a core, primaryY and secondary Vcoils thereon, clampingA Ymembers therefor, said members ,beingaformed with recesses ontheir inner surfaces to receive the ends of the coils, and

tubular projections communicating with the recesses to receive the terminals of the lprimary winding and other recesses formedand located on the outer ends of the members,

metallicV members locatedzonY the said other recesses fordistributing the magnetic iluX from the core, atie rod and means thereon Vfor drawingthe clamping members toward Yeach other. Y j 2. A cap or closure for one end of an induction coil comprising amember Vformed of molded insulating material, terminals Vvformed with flanges which arelocated in the Vsaid material for ,receiving thejrendsof the .primary f coil, a lcentrally disposed interiorly vthreaded sleeve formed lwith flanges end als@ 'located in the Said material and :pieces having an' interiorly threaded-part riorly threaded nut engaging the threads of the sleeve and a part engaging the shoulder thereof, the said nut having interiorly locatedfthreads Vfor engaging the threads on the rod, whereby when the nutis threaded intothe sleeve against the shoulderthe tie rod may be tightened. Y

3. In an inductionfcoil, the combination of a member forclamping the coreand the primary and secondary coils of an induction coil, said member having depressions on its opposite faces, the depressions on their'sin'i i ner faces being for directly receivingA the ends of said 'coils,metallic discs located in theV depressions on their outer Afaces' and which directly engage the ends ofthe core, -a tie rod, means on the rod engaging theV discs for drawing the whole together.V

4; An induction coil, comprising a core'.` primary and secondary coils thereon, of 71a" pair of recessed coil clamping membersto receivethe ends of the coils,me'ans for drawf ingV the members againstY the ends of the coils, said members having an openingto'r receive the ends of the core, magnetizable pieces formed with openings and directly engagingl the ends ,of the core and located, on the recessedV clamping members, theresoY cessed members having tubular projections V which enter openings in the magnetizable" pieces. p

5. An induction coil comprising a core, a primary and aV secondary coil arranged about said core,.a member composed of insulating material and each formed with a centrally disposed openinginto which the ends ofthe core projects, each member hav. ing oppositely disposed recesses, thelrecessesV on one side Vof each member receiving the 1 ends of the said coils, each memberv having perforated projections to receive the ends of the primary coil, metallic diskshaped plates formed Vwith openings to receive the projec-Y tions of each of said members, and located in theFGCQSSGS'OHtheouterends@reach afraid` Y members, said plates each having a radially arrangedjopening. and means for vclamping ilo' the members in place comprisinga tie rod'Y A whichis located in therradially arranged f openingV j Y A Y Y Y Y An induction `coil comprising a1k core" primary and secondary windings'thereon, a

member atgeacliend of thecoils and engagfV Y@ Y Y Vingthe same and each Aformed with recesses,

an enclosing casing, Va closurefpiece ateacli end of the casing, metallic. disk-shaped'mein;

bers engaging the ends .of the core, piecesof insulation on the outermostfone of the metallic disk shaped pieces, a tie bolt connected to the closure pieces, one of the closure therein and a flange part engaging the piece of insulation at one end of the coreJ the other or upper Closure piece having an interiorly threaded part therein, a nut having threads on its interior and exterior and engaging the threads of the interiorly threaded part in the upper closure piece, a tie rod having threads at each end which is threaded into the threads of the rst mentioned elo- 10 sure piece, its other threaded end being engaged by the internal threads of said nut, a washer on the rod and engaging the piece of insulation at the upper end of the core, whereby when the nut is tightened the c10- sure pieces will be secured to the easing and the metallic disk-shaped pieces forced against the ends of the core and said members at each end of the Coils will be forced towards the ends of the coils.

EDWARD B. JACOBSON.

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