US947647A - Inductor-generator for ignition purposes. - Google Patents

Description

H. J. PODLESAK & T. E. PODLESAK. INDUOTOR GENERATOR FOR IGNITION PURPOSES. nrmouzonrmnn M128, 1908. RENEWED ran. 10. 1909.

947,647. Patented Jan. 25; 1910.

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HENRY JOSEPH PonLssAK, or curcaoo, ILLINOIS, AND 'rnsna EMIL PODLESAK, or

' Momus'rowN, NEW JERSEY.

, INDUCTOR-GENERATOR FOR IGNITION PURPOSES.

Specification of Letters Patent. Patented J an. 25, 1910. Original application filed September 25, 1901,,S er'ia1 No. 76,559. Divided and this application filed January 28, 1908, Serial No. 413,070. Renewed February 10, 1909. Serial No. 477,251.

To all whom it may concern:

Be it known that we, HENRY JOSEPH Ponnnsiu and TESLA-EMH. PonLnsAK, residing at Chicago, in the county of Cook and State of Illinois, and Morristown, county of Morris, State of New Jersey, respectively, have invented certain new and useful Improve mcnts in l nducttar-Generators for Ignition Purposes, of which the following is a specification, reference being had therein to the accompanying drawings.v

This invention relates to inductor alternators for ignition purposes. It essentially pertains to inductor alternators capable of producing electrical effects suitable for the ignition of combustible charges in internal combustion motors. It. is for a division of the subject matter shown and disclosed in our application for Letters Patent Serial No. 76,559, filed September 25th, 1901.

The principal object of this invention is to provide an inductor generator adaptable for use in connection with a reversible motor, so that the electric generator will pro duce the requisite electromotive force to cause a spark in the engine cylinder at the )roper instant, irrespective of the direction in which the crank shaft of the engine is rotating. r v

. Figure 1 is an edge elevation of an inductor generator embodying our improvement, a portion only of the inductor-carrying element being shown. Fig. 2 is a side elevation of the. parts shown in Fig. 1. 'Fig. 3 is a side elevation of the pole piece, detached. Fig. ft is a perspective view of the same.

In the dra\vings,-l indicates a permanent magnet preferably horseshoe or U- shaped in form. It is composed of as many I magnet sections, arranged in series, as may bercquired to establish the desired density of magnetic field.

4 is a frame, preferably of non-magnetic material, and employed to position and support ,in proper relation to each other the normally stationary parts of our inductor alternator.

9 are clamp oieces or cleats arranged to bear againstthe outermost magnet section in the series, and 7 are bolts or screws extending through said cleats and into the. frame 4, and adapted to clamp or bind the said frame and permanent magnets together.

21 are pole pieces composed of a suitable member of punchings or laminae. A pair of these pole pieces is preferably usechassembled, one at either side of a suitable center piece or spacing piece 10 of nonmagnetic material, and suitably bolted thereto by means of bolts This nonanagnetic spacing piece 10 is suitably secured to the frame at by means of bolts or screws 6 and ll,'so as to hold the laminated pole pieces 21 in close magnetic contact with the ends orv poles of the permanent magnet sections.

As shown, each one of the pole pieces has three polar projections, the center one of which serves as a coil core, and is indicated as 12, the ones at either side of it being unwound and indicated as 12 and 12, respectively. A winding or coil 20 of insulated wire is slipped upon and suitably secured to the middle polar projection or coil core on each pole piece. The outer faces or polar faces of the . polar projections 12, 12', and 12, are suitably shaped to conform to the path of travel of a suitable inductor, hereinafter described. Thepolar faces on the polar projections 12, 12, are designated by 2, 2, respectively, and hereinafter referred -to as exciting polar faces, and the polar faces on the polar pro ections 12, are designated by 3, and hereinafter referred to as generating polar faces.

19 is an inductor, preferably formed of punching s or laminae of suit-able metal. This inductor is adapted to be rotated in either direction, so as to have one of its faces. pass over and closely adjacent to the polar faces of the polar projections on the pole pieces by 'mere mechanical clearance, or, in other words, as close to said polar faces as mechanical conditions will 'permit-. The said inductor 19 is connected with and car ried by a wheel or disk F, only part of which is shown. This wheel F maybe of any suitable construction, and may be the fly wheel of a motor, to the ignition apparatus of which, the induction windings of the generator are connected. The polar faces 2, 2', 3 and the face of the inductor which passes adjacent to them, are preferably shaped to the arc of a circle struck from the axis of the wheel F as a center.

" Normally the lines of magnetic force emanate in a scattered way from all sides of the magnet and for about one-half of its length from its free ends, and some of these lines of force emanate from the pole pieces. The inductor 19, when rotated in clockwise direction, first spans the exciting polar faces 2 and causes the concentration of a dense flow of magnetic lines of force, a substantial magnetic shorteireuit, between the polar projections 12 of the laminated pole pieces. The inductor then moves across the air gap between the exciting polar faces 2 and the generating polar faces 3 and causes a rapid and substantially complete diversion of the magnetic flux density, first concentrated across the exciting polar faces, into and through the coil cores 12 and across the gene ating polar faces, so as to establish a substantial magneticshort circuit across the generating polar faces. The inductor then leaves the generating polar faces, crosses the air gap between them and the exciting polar faces 2, and the magnetic flux density through the induction windings is rap-idly diminished, a substantial magnetic short circuit being established outside of them.

If the inductor 19 is rotated in anti-clockwise direction, it first concentrates the lines of magnetic force across the exciting polar 1 faces 2', 2, then across the generating polar faces, and then across the exciting'polar faces 2, 2. It will thus be seen that in either direction of rotation the inductor operates to bring about similar variations of magnetic flux density in the induction windings. This we have found to be of great importance where our electric generator is used with a reversible motor, as it insures-simi larly satisfactory ignition in either direction of rotation of the motor.

with an inductor alternator constructed in accordance with our invention, the inductor does not at any time move sutliciently closely to the limbs of the magnets themselves to draw or concentrate a dense magnetic flux across the limbs of the magnets above the poles thereof, but on the contrary,

we have so constructed and arranged the elements of an inductor alternator for ignition purposes, that the inductor in its operation tends only to draw or concentrate the magnetic flux emanating from the magnet oles at the said magnet poles, thereby tending to prevent the shiftin of the said poles and to overcome the ten eney of the said poles to shift, with the consequent loss of magneto-motive force by the magnets.

The elcctro-motive force is generated in the inductive windings 20, as in all dynamoelectric generators, by varying the magnetic flux density in the said windings. The inductor 19 operates to cause a very rapid varying of the -magn'etic flux density by first establishing a substantial magnetic short circuit, 1'. 6., by-coneentrating the mag netic flux at a point adjacent to but outsi e unwound polar of the induction windings, so that the magnetic flux density in the cores of said windings is practically zero, then quickly diverting the magnetic l'luxthrough thecoil cores, and then, practically instantly, establishing a magnetic short circuit outside of the coil, cores and causing the magnetic flux density in said coil cores to again drop to substantially zero. l

\Vith multi-cylinder motors, two or more inductors are used, there being one inductor for each cylinder, as will readily be understood, unless the periods of ignition of two or more of said cylinders occur at the same period of the stroke at alternate revolutions.

In any casc, an inductor must be provided and so arranged that it will pass over and span the generating polar faces when the ignition of a combustible charge is required. Also, when the motor is arranged fortwo or more ignitions, usually termed late, early, el (1., it may prove desirable to use one inductor for each of such ignitions, and to mount and hold stationary the permanent magnet and induction windings.

What 'we claim isl. in an inductor generator for ignition purposes, the combination of a permanent magnet, a pair of pole pieces each held in magnetic contact with one pole of said magnet and having three polar projections, a coil of wire in inductive relation to the middle polar projections on said pole pieces, and an unwound inductor movable relative to said polar prajcctionsto concentrate the magnetic flux emanating from the polesof said magnet first outside of saidv wire wound polar projections and between said pole pieces, then across said wire wound polar projections and then outside of said wire wound polar projections and between said pole pieces in rapid sliccession.

2. [u an inductor generator for ignition purposes, the combination of a field magnet, a pair of pole pieces each in magnetic contact with one of the poles of said field magnet and having three polar projections, two coils of wire, one in inductive relation to the middle polar projection on one pole piece and the other in inductive relation to the middle polar projection on the other pole piece, and an unwound inductor movable in either direction to concentrate between-said pole pieces the magnetic flux emanating from the. poles of said magnet, first across rejections, then across the said wound mid dle polar projections and then across the other unwound polar projections.

1}. In an inductor generator for ignition purposes, the combination of a permanent magnet, laminated pole pieces'in magnetic contact with'the po es of'said magnet, each" pole piece having a coil core and polar projectious with exciting polar faces on oppc site sides of said coil core, coils of insulated Wire in inductive relation to said coil cores, anti 2:. laminated uiuvouncl inductor mounted on a rotatable support.

4. In an. inductor "for ignition purposes, the combination of a permanent netic contact. with one of j id magnet, one 0:? said pole pieces carrying three polar pro ections having; po ar faces arranged in series in the are of u circle, a coil of insulated KVlTQ in inductive relation to the middle pole? projection cit saicl series, the polar psoject-ions at either side of said middle one being unwound, and on incluctor rotatable in either direction relative the polar faces of said polur projections to in tei'ini'ttently establish subs iutiul inu neticshort circuits between each one of suiu pols projections and the opposite polo piece.

6. In an inductor generator ignition purposes, the combination of it permanent magnet, u puirot pole pieces, each in mignctic contact with one of the magnet and having three polar projections each nrovidotl with polar faces, on. induction Winding on the iniclclle projection of: eeci one of sui pole pieces, and on unwound rotatable inrluctor shaped and C(HifilliKKl to the said polar on said pole pieces and ranged vlieu rotated in either direction to firstconcentrate the lines of insu netic force emanating from said, magnet poles between said pole pieces outside of suiti iiniuction windings, then rapidly to divert tlie mug];- netic flux through Stiltl induction winding-3;, 21ml then as rapidly divert soul magnetic poles of said flux outside of said induction windings, and. between said pole piece 7. In inductor generator for ignitiofi purposes, the combination of a lei-polar permanent ficlcl magnet, a pair of pole pieces, each held in magnetic contact with one o the-poles of said field magnet and in suitable relation to each other, and each having three polar projections, each of which terminates in e polar face, two'coils of Wire, each Wound in inductive relation on the middle polar project ion of each said pole piece, a movable unwound inductor, arranged to establish, bv its movements, a magnetic path through itself end alternately through the unwound pole; rojections and the Wound polar projections of the said pole pieces.

8. in. an electric generator, the combination of e field. magnet provided with pole pieces, three polar projections carried by one of said pole pieces, a Winding on the middle polar projection, and an unwound inductor adapted cyclically to short-circuit the magnetic fluxcutside of said winding, then (li--" vert the flux through said Winding, and then again clivert the fiuX outside the windin z 9, in an electric gejierstcl, the combinw tion of a field mugneupruviged with pole pieces, three polar projections carried by each of said. pole piecesQawind. on the middle polar projections, and on unwound inductor adapted cyclically to short-circuit the magnetic flux outside of seiclvintlings, then divert the flux through isaid, windings, antltlien again divert the flux outside windings. i

in. witness whereof We efiix our signatures, in the presence of witnesses. V

HENRY JOSEPH ?ODLESAK. TESLA. EMlL PODLESAK. Witnesses to the signature of Henry Joseph Potllesztk:

J. QEJBEK, J. ToirAsnK. Witnesses to the signature Podlesak LILLIAN B. SHERMAN, JOHN H. BONSALL.

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