US965484A - Magneto-generator. - Google Patents

Description

LA VERNE W. NOYES. MAGNBTO GENERATOR.

' APPLICATION FILED JAILZ'I, 1910.

965,484. Patented July 26, 1910.

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LA VBRNE W. NOYES.

MAGNETO GENERATOR.

APPLICATION FILED JAN.27, 1910.

Patented July 26, 1910.

2 SHEETS-SHEET 2.

LA VERNE W. NOYES, OF CHICAGO, ILLINOIS.

LIAGNETO-GENERATOR.

965,484. Specification of Letters Patent.

Applicati filed January 27, 1910. Serial No. 540,343.

To all whom it may concern:

Be it known that I, LA VERNE IV. Norris, citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Magneto Generators, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to magneto generators and has for its general object improved construction and rearrangement of component parts of magneto generators to simpllfy their formation and assemblage, a magneto generator constructed in accordance with my invention being highly eflicient in the generation of alternating current.

The generator of my invention is of particular service in supplying alternating current to spark plugs that enter into the construction of internal combustion engines, though I do not wish to be limited to the use to which the invention is put.

I will explain my invention more particularly by reference to the accompanying drawings showing the preferred embodi-li ment thereof as embodied in a two pole generator, in which Figure 1 is an end elevation of a magneto generator constructed in accordance with my invention; Fig. 2 is a view of the structure taken in the direction of arrow 2 of Fig. 1; Fig. 3 is a sectional View on line 3 3 of Fig. 2; Fig. 4 is a sectional view on line at 4 of Fig. 1, an induced circuit being diagrammatically indicated; Fig. 5 is a View in per spective of a nonmagnetic.mounting for two magnetic bodies which enter into the construction ofthe rotor and which serve to effect periodical reversal of magnetic'flux for the purpose of setting up alternating current. I

Like parts are indicatedby similar characters of reference throughout the different figures. F

The field portion of the generator is in the form of a compound permanent magnet a, the different elements of the compound. permanent magnet being desirably in the form of superposedlaminm. The compound permanent magnet isdesirably provided with-soft iron insctting polar extensions 7), also formed of lamina. anil-ii'iterleuvod with the component laminar of the com-pouml permanentmagnet, as illustrated most clearly in Figs. 1 and 3, suitable clamping mechanism 0 being employed to bind the interleaved laminae together, it being understood that the engaged faces of the interleaved laminae are preferably flat, smooth, bright and clean to eliminate reluctance in the magnetic circuit of the compound magnet where the compound magnet is joined with its soft iron pole pieces, while the contacting surfaces of the laminae of the compound magnet a, as well as the contacting surfaces of the laminae of the pole pieces I) may be rusty to reduce loss that would otherwise be occasioned by induction of eddy currents, as is Well known by those skilled in the art. k

In order to increase the areas of the pole faces, I desirably interpose pairs of laminae composing the pole pieces 6 between the laminae of the permanent magnet a, the laminae of the pole pieces being closely pressed together at their inner ends and fanned apart where they are interleaved with the laminae of the compound permanent magnet. By the preferred construction of the permanent magnet and the pole pieces described, said pole pieces and magnet have spaced apart portions that are in terleaved or intermeshed at their contiguous ends. The rotor that moves within the field of the permanent magnet includes, in the embodiment of the invention illustrated, a shaft d whose intermediate portion 6 is desirably of the construction illustrated in Figs. 1, 3 and 5, this intermediate portion having dovetail tenons f that engage corres onding mortises provided in the portions pf the rotor.

In the embodiment of the present invention illustrated, the portion a of the rotor is composed of nonmagnetic material and the portions are composed of laminae of soft iron which are maintained in assembled relation by riveting pins h. The bearings and 70 receiving the ends of the shaft cl of the rotor are carried by a body or structure Z of nonmagnetic material, desirably generally cylindrical in form and through diametrically opposite parts of which the pole pieces .7) project. The bearing 7.: may be an integral part of the body Z, the companion bearing being separably secured to the body Z. ,The body Z thus constitutes a housing for'the rotor and a support for its bearings and the soft iron polar extensions of the permanent magnet, this housing body maintaining the rotor and the magnet poles Patented July 26, 1910.

. proper relative positions to have the combetween the sides of the work circuit.

pound permanent magnet a secured thereto, the outer ends of the laminae of the polar extensions I) being spread apart to afiord spaces therebetween in which the laminae of the compound magnet a are received, diverged outer ends of the laminae of the pole pieces I) being located in close proximity to the housing Z. The structure illustrated 1ncludes a fixed or stationary laminated soft iron core portion on of U- shape whose base is surrounded by the induced coil n that supplies alternating current to the work circuit and the translating devices connected with the work circuit, a single spark plug 0 being diagrammatically indicated in bridge T e ends of the U-shaped core m are inturned and project through the housing or holding structure l in a plane at right angles to the plane occupied by the" pole pieces I), the housing Z firmly securing the inturned ends of the core m in place, said housing thereby supporting said core and, through the intermediation of said core, also supporting the induced coil n.

As the parts are illustrated in Fig. 3, the magnetic flux finds path from the upper (positive) pole of the permanent magnet across the air gap intervening between this pole and the contiguous soft iron laminated rotor segment 9, through this segment, thence acrossthe gap intervening between this segment and the contiguous end of the scribed in which the flux passes through the soft iron core m is reversed at approximately each quarter revolution of the rotor, there thus being impressed upon the work circuit an alternating electromotive force of two cycles per revolution of the rotor.

The housing or holding structure Z is desirably made by casting nonmagnetic metal into a mold in which the soft iron pole pieces 6 and the soft iron core m are secured in the relative positions they are to occupy in the completed structure. The cast metal, upon cooling, will very firmly grip the pole pieces 6 and the core m so that these elements'are very securely held in fixed relation with each other and with the bearings i is for the rotor. Two apertures are desirably formed in each end of the core on and each of the soft iron pole pieces Z),

through which apertures the molten metal flows to constitute shanks p which tend further to maintain the parts in their proper positions and also to prevent movement of the pole pieces and the core m in the respective planes of their laminae in the event of imperfect casting.

It is of course understood that the wind ing a is of such design that with a predetermined speed of the rotor, the requisite electromotive force is impressed upon the work circuit.

While the laminae illustrated are not very thick in proportion to their other dimensions, yet I do not limit myself to the thickness or thinness of the laminae and therefore use the expression in its broadest sense of superposed, piled or overlying layers of any selected suitable thickness.

I have herein shown and particularly described a magneto generator adapted to impress alternating elect-romotive force of two cycles per rotor revolution, but I do not wish to be limited to this relationship, nor to the type of rotor shown, nor to the precise details of construction shown, nor to a stationary inducing coil, as changes may readily be made without departing from the spirit of the invention, but

Having thus described my invention, I claim as new and desire to secure by Letters Patent the following 1. A magneto generator including a C0111- pound permanent magnet formed of lamina: spaced apart near a polar end and having a pole piece terminating in spaced apart laminae that are interleaved with the aforegaging and holding said pole piece wherethe aforesaid portions are not intermeshed. In wltness whereof, I hereunto subscribe my name this 26th day of January, A. 1).,

. LA VERNE W. NOYES. Witnesses:

G.'L. ORAGG, R. E. ATHERTON.

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