US1115921A - Magneto-generator. - Google Patents

Description

L. J.,PLINT. MAGNETO GENERATOR.

APPLICATION FILED MAY 17, 1911.

1, 1 1 5,921 Patented Nov. 3, 1914.

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J Qq -zzmwJ rzi/ 121W 5 2% L. J. FLINT.

MAGNETO GENERATOR.

APPLICATION FILED MAY 17, 1911,

1 ,1 1 5,921, Patented Nov. 3, 1914-.

v 1 2 SHEETSSHEBT 2.

By 2. J0

UNITED STATES PATENT OFFICE.

LOUIS J. FLINT, OF CHICAGO, ILLINOIS, ASSIGNOR TO GRIP NUT COMPANY, A CORPO- RATION OF ILLINOIS, OF CHICAGO, ILLINOIS.

To all whom it may concern Be it known that *1, Louis J. FLINT, a 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 lVIagneto-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.

This invention relates to apparatus for producing electric sparks for the purpose of igniting explosive charges, particularly in the case of internal combustion motors.

The object is to improve upon the constructionshown and claimed in my co-pending application, Serial No. 581,195, filed September 13, 1910, in the manner of forming the casing for the device, and in arranging the magnets which excite the armature, as well as in the manner of making the distributer.

Another pbject is to provide the interrupter with means whereby it may be, re-

assembled by a person unacquainted with adjusting such devices, so that the original adjustment may be retained.

Further objects will be recognized by those skilled in the art in the arrangement of parts and construction hereinafter described. Figure l is a central vertical longitudinal section of my. device; Fig. 2 is a sectional View on line 22 of Fig. 1;Fig. 3 is a sectional view on line 33 of 1; and Fig. 4 is a sectional view on line 4+4 of Fig. 1.

Throughout the specification the same reference character denotes the same element.

Referring more particularly to the draw- I ings, 1 is a base -on which the device is mounted.

\ 2 is an octagonal casing or box of nonmagnetic material, having .caps or closures 3 and 4 at its ends, which provide bearings 5 and 6 for the shafts ofthe machine. The driving shaft 7 drives the armature shaft 8 through gear device 9, This device comprises a ring 10 rotatably mounted in a cylinllrical extension 11 of the closure '3. Mounted within the ring 10 are bevel gears 12 which mesh with corresponding gears 13 on the shafts 7 and 8-. When the ring 10 is stationary these gears drive the shaft 8- in a way that is apparent. However, if it is desired to change the angular relation of shaft 8 with respect to shaft 7 1n order to i Specification of Letters Patent. Application filed May 17, 1911. Serial No. 627,646.

j advance or retard the MAGNETO-GENERATOR.

Patented Nov. 3, 1914.

sparking points of the device, this is readily accomplished by shifting the ring 10 by means of its handle 14. Also if shaft 7 is stationary by shifting handle 14 a spark can be produced for starting the engine from standstill without the use of the batteries ordinarily employed for this purpose. (lo-axial with the shaft 8 is the shaft 15 These shafts carry the plates 16 and 17 respectively. Between the plates 16 and 17 are mounted the cores 18- 18 of the armature of the machine, the cores being carried directly by bolts passing between the plates-16 and 17.

The cores l8 carry primary and secondary armature coils 20 and 21 respectively. Carried on the shaft 15 is also the distributer 22. This distributer has a somewhat different appearancethan that in my'co-pending application, No. 581,915, above r ferred to, but operates upon the same principle. The present design, however, admits of a better insulation ofthe distributing points frcmone another, and alsoallows the angle between the distributing points of these separate cylinders to be rately adjusted.

The body of the device 22 is formed of ebonite or hard rubber and is intended to be molded in a manner well known to those who are accustomed to work in this material. The ebonite structure is indicated as insulating material in the drawing. within which are the various distributing elements 23, 24, 25 and 26. In the device for use with a fourcylinder motor there will necessarily be four of these distributing members and it is pecessary in assembling to set or adjust the members at anangle of 90 degrees to each other. This is done by drilling holes in the members 23, 24, 25 and'26 at points which are 90 degrees from each other, and passing a rod or pin 27 through the holes. The distributing members area them assembled on tllle shaft 15 and the ebonite, molded around 15 em. I

Attention is called to Fig. 4 as illustrating this portion of the device. Cooperating with members 23, 24, 25 and 26 are contact points 28 which are connected to the individual cylinders in a manner that will be apparent: These points 28 rest on collars 29 which are formed'in the. ebonite, the diameter of the collars being equal to that of the distributing members, so that the points easily and accu- .do not vary their position in making and breaking the circuit. Within the shaft 15 is an insulating sleeve 30 within which in turn is a rod 31. 31 is connected to one side of the armature coils while the other side is connected to the shaft 15 or to the frame of the machine which serves as ground. At the end of the shaft 15 are mounted two spring parts 32 and 33, insulated from each other by the washer 34. The parts carry at their ends contact points and 36. Spring 32' connects withrod 31 as ShOWn at 32. while spring 33 is in contact with shaft 15. Mounted on the cap 4 inthe plane of revolution of the springs 32 and 33 is a disk of, insulating material 37 having projecting prongs 38 -38.

Referringto Fig. 3 it will be seen that as the springs 32 and 33 revolve they will be separated by the prongs 38 at fix gd points in the revolution. It will be obvldus from what has been said that during the major part'of the revolution of the springs they will be in contact, thus short circuiting the primary coil of the armature through shaft 15 and rod 31. But when the contacts 35 and 36 are separated by prongs 38 the primary circuit of the armature will be opened and the voltage allowed to build up to produce a spark for igniting the charge in one of the cylinders. The ring 37 is set in such a position that the primary circuit is thus opened at the same instant that one of-the distributing members comes'in contact with its point 28. The springs 35 and 36 are clamped in position by the nut 39. It is a valuable feature of my device that I provide a fiber pin 40 which passes through the springs 32 and 33 into the end of the shaft 15, so that when the device has been adjusted to give the spark at the position of maximum efficiency, the springs may be taken apart, for inspection by an unskilled person and reassembled with the assurance that they will be placed in the same position as when adjusted at the factory.

f A condenser 41 is connected toreduce the sparking at the contact points 35 and 36,

according to the usual practice; This condenser is carried Within an outer cap 42 attached 'to the cap 4. In the device shown in the drawings the condenser is wound upon an interior nut 43, which is attached to the cap 42 by means of nuts such as 46 and insulated from the cap 42 by the fiber washer 46 One side of the condenser is connected to the frame by the conductor 44, thus connecting with the grounded spring 33. The other side of the condenser connects with the member 43 through the conductor 45 and thence through 43 to the brush47 which is in contact with the nut 39 which bears on the spring 32. The conductor 45 in practice is placed inside the cap 42, but is shown diagrammatically in Fig.1

as passing through the cap 42'and connecting with the nut 46. The magnets for exciting the armature are carried on the exterior of the box 2 and are shown in end View in Figs. 2 and 3. These magnets are numbered 48-48 and extend parallel to the shaft of the machine. As the arrangement shown is for a four-cylinder motor the magnets are arranged so that north and south poles almature, thus producing two complete electric cycles per revolution, providing four points on the voltage wave at which sparks may be produced. The magnets however, are removably attached to the casing by screws so that if it were desired to use the device with a two-cylinder enginetwo north poles would be placed adjacent to each other producing a bipolar field, and consequently only one electric cycle 'per revolution.

It will be observed that the magnets are placed exactly 90 degrees apart, so that the peaks of the waves will also be 90 degrees apart and the spark for each cylinder can be taken at a maximum point of the voltage material pole pieces 49 are cast lntegrally with the case so as to furnish a path of low magnetic reluctance for the magnetic lines coming from the magnets.

in a different manner in this application from that'in my copending application Serial No. 581,915. In the former case such insulating material.v In the present case, however, it will .be seen that each contact point 28 is carried by a block of insulating material 50, which is threaded into an individual opening in the case 2. Within the block 50 is a socket connection 51 for making connection with the wire leading to the cylinder, 51 being in contact with 28. In this way any particular contact point may beremoved for inspection without disturbing the others, while the maximum of insulation is provided and the device is very cheaply manufactured, since in this design the insulating blocks 50 may be molded in place.

It will be understood that, while the arrangement shown and described herein is the preferred form of my invention, changes andrmodifications may be made therein without departing from the spirit of myinventions comprised within the scope of the appended claims.

What I claim is: Q 1. In device of the class described in combination, an armature structure, two coils wound upon said armature. structure,

each coil subtending an angle-of 90 degrees ternate around the circumference of the ar-' sockets were embedded in a single piece of tion, and that I contemplate all modifica and two south poles adjacent to each other,

wave. Since the case 2 is of non magnetic H It will be pbserved that the contact points and connectmg sockets for making 'connec-. tions with the separate cylinders are formed magnets secured to octagonal, faces of said case.

3. A high tension ignition system, comprising an armature, field magnets coiiperating with said armature, and an interrupting device connected in the circuit of said armature, said device being provided with means for indicating its proper position with relation to said armature.

4. A. device of the class described, comprising an armature, field magnets for said armature, a shaft carrying said armature, an interrupting device carried by said shaft and a pin passing through said device into said shaft.

5. The combination of an octagonal case provided with inserts of magnetic material,

said inserts forming certain of the octagonal faces of said case, and magnets-secured to the outer sides of said inserts.

6. A device of the class described, comprising an octagonal caseand forming octagonal faces thereof, magnets, pole pieces embedded in said case and means for attaching said magnets to the faces formed by said pole pieces.

7. The combination of an octagonal case, of inserts of magnetic material forming alternate faces of said case, and magnets secured to the outer surfaces of said inserts.

8. A magneto generator comprising in combination, two pairs of permanent magnets mounted 90 degrees apart, an armature provided with two magnetically distinct cores cooperating with said field magnets,

and coils wound on said cores.

In witness whereof, I hereunto'subscribe my name this 11th day ofMay, A. 1)., 1911.

LOUIS J. FLINT. 4 Witnesses:

A. LYDA JONES, HAZEL JONES.

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