US1162521A - Magneto. - Google Patents

Description

1 E. SHERIFF. .mmNU'o. APPLICATION FILED NOV. 27. l9l 4.

1,162,521 Patented Nov. 30, 1915.

4 SflEETS-SHEET 1.

. -q H I I MIIZQSSES: 7 a III/E]? 0r J E. SHERIFF.

MAGNETO.

. APPLICATION FILED NOV..27| 1914.

1 ,1 62,521 Patented Nov. 30, 1915.

4 SHEETS-SHEET 2.

J EfSHERlF F MAGNETO.

APPLICATION FILED NOV.27. 19H.

Patented Npv. 30, 1915. 4 SHEETS-SHEET 4- whatever be the speed with which the mag- I plane in which Fig. 1 is taken. Fig. 3 is- .a transverse section in the plane of the line STATES PATENT OFFICE.

.7 ED snnmrr, or-UNIoNnILL, nnw'mnsnx, nssrenon 'ro'aoxrenrmxnmnnor 'nnw'yonxn. Y.

mAeNnro.

Specification a: ne'er- Patent.

Patented N (W. 30, 1915.

Application filed November 27, 1914. 1 Serial No. 874,239;

To all whom it may concern:

' ,Be it known that I,-J ED snnnlrnja'citi zen of the United States,'and resident of Union Hill, in the county .of Hudson and State ofNew Jersey, have invented a new and useful Improvement in Magnetos; "of which the followingis a specification.' I.

My'lnyentlon relates to a magneto, and

a more particularly to a magneto adaptedt'or use. in connectlon with an explosiveengine to explode the charges of compressed neto is rotated. g s

A further object is to provide a magneto in which the spark may be advanced or re tarded any number of degrees; and a still further object is to-provide a magneto which shall produce a spark of longer duration.

A. practical embodiment of the invention is represented in the accompanying drawings in which,

Figure 1 is a central section through the magneto, the plane passing through the north and south polesof-the permanent ring magnet, showing by means'of arrows, the flow of the magnetic current. when the parts are in the positionshow'n by full lines and by means of dotted arrows the flow of the magnetic current when the parts are in the position shown by dotted lines, to wit: a half revolution from the position shown in full lines. Fig. 2 is a central longitudinal section in a plane at right angles to the A-A of F 1, looking toward the left as the drawing is held. Fig. 4 is a-transverse section in the plane of the line B-B of Fig.

1, looking toward the ;right as the drawing is held; Figs. 5 and 6 are views of opposlte ends in elevation. .-Fig. 7 is a view in detail elevation, of the toothed wheel for trans m'itting current from the coil to the segments, and Fig. 9 is a new in detail showing in end elevation, the armature, the ends of the pole pieces,'the plates at the opposite sides of the armature in whichjthe armature is mounted, and showing the insulation around the ends i w of the 'polepiec'e's-in section, the viewbe ng taken ln-the plane of the line C"C of Fig.1. r A permanent, magnet'in the form of a ringis represented by 1; Itis supported at its opposite ends; by caps of non-magnetic material, denoted respectively by. 2 and 3. One

' 8, serves to hold a ring of wiregauze- 9 in position between theflange of the bean mg 5 and the hub of the .cap 2. The trun nion Amay be connected witjh'the engine shaft, not shown, m' any';well known or approvedmanner, for causing the magneto torotate in harmony with the engine shaft. The cap 3 at theopposite end of the permanent magnet 1,1 is provided with a IhOllOW hub 10, whlch rotates in .a suitable bearing 11, m. the inner wall of a cup-shapedjpors tion 12, of an endYframeffixed to and ex'-.

tending at right angles from the base' frame U-shaped pole pieces 13 and14 are at tached at their middle portions, the one tothe north pole of the permanent magnet 1,

and the other to the southpoleof the per manent magnet, the branches of said U shaped pole pieces extending toward one another and terminating, as clearly shown in Y Fig. l, a distance apart sufiicient to permit.

the opposite endsof the. armature tovibrate a predetermined distance between them.

' Attheir extreme ends, the branches of the pole pieces extend a short distance outwardly, as shown at 15, the shape of said ends being shown clearly in Fig. 9. These ends of the pole pieces are insulated from the non-magnetic caps 2-and 3.

The vibrating or rocking armature is denoted as a whole by 16. It is of laminated construction, the different laminae being held in juxtaposition'by means'of transverse rivets l7. A spindle 18 extending transverselythro'ugh the armature, has its opposite'ends tapered as shown, and seated in tapered sockets 19, 20, in side plates 21, 22,-.which side plates have their endsextendedinto re cesses in the inner ends of the hubs of the loo caps 2 and 3, into which recesses also'the projections 15 on the branches of the pole pieces extend, the endsofithe s de plates a from the hubs- -ofth 2 22, being refer shown n Fi 9,. '1

ends of the-1pc of vibration of plates 21, projecting 22, are provided w flanged pieces 21*,

'ieces, are

like the insulated 1P pieces. Theaxis 'rmature 16,'is transaverse to and passes-through the axis tion of the-permanent magnet 1. The side ith inwardly 22*, through of rotawhich suitable insulated fastenings extend to hold the plates together.

armature At one end, the

16 has welded or otherwise suitably secured thereto, a conthe pole pieces 13, 14. This coi An annular coil 26 o necting piece '23, which may be of steel, the neck of whi h the said neck piece the socket 24.

f fine wire surrounds the armature 16, and side plates 21, extends outwardly to "the interior faces of l is provided 22, and

on its exterior with siiita'ble insulation. It

27, whichconnects grounded by means of a connecting piece the coil with the cap 2,

4 and the current is led therefrom at the opposite end of made fast to which passes,

. end of the coil and along wi the cap 3, into of the' springs cated on the face of a flange the coil by means of a wire 28, through the insulation at the thin the hub of electrical contact with one 29. The springs 29 are lo- 30, on a disk of insulating material 31, the said disk being mounted thereon,

of springs 29., which -33 to yield toward the flange to hold it inment of the rim 33 away from the under the pressure of springs permit limited -by the engagement of the with abutments, such as shownin Fig. 1, on material 31. is provided with a along the bottom tervals, there are The outer of which at holes 36 for the reception the the end of the hub of the cap '3, by means of screws 32. The disk 31 has in yielding adjustment, an

cting material, th

(1 to the flange 30 terialby means the rim 30, and tendthe desired position, the moveflange 30, the springs 29, being springs the abutment 34, disk of insulating face of the rim 33 n annular groove 35,

of the teeth 37 on a wheel 38.

In the outer edge 12, a distributer rim 40, engages a walli lformed on is re 39 o mounted to rotate by and secured to the distri 41, or other ,well known or appr One wall of the V- haped por the inner face of. t and the said rim 40, toge of he rim of means 0 a corresponding tained in by means of an frequent inthe cup f insulating material is buter 39, by pins 'oved means. tion of the tapered he rim of ther with position and annular ring 42, screw threaded on its exterior and screwed into the interiorly screw-threaded outer edge of the cup "12.

On the inner face of the distributer 31, there is seated a ring 43, of conducting material, said ring 43 being subdivided into four segments denoted respectively by 44, 45, 46, 47 insulated from one another and provided with a series of holes 48, for the reception of the teeth 37 on the wheel 38; see Fig. 4. The line of holes in the seg-' mental ring 43, is opposite the line of holes in theyielding ring 33, and the segmental ring 43 is spaced from the yielding ring 33, the diameter of the toothed wheel 38, so that as the ring 33 revolves together with the being connected with its particular cylinder in the proper order of explosion, and for this purpose, each segment is connected to the exterior of the plate 39, by a plug 49 of conducting material, which in turn is connected by awire 50, with one terminal within the cylinder, the opposite terminal on the opposite side of the spark gap, indicated at 51, within the cylinder, being connected by a wire 52, with the'cup 12,'as its ground connection.

To short circuit the current, when'it is desired to cut it off from the cylinders,an insulated plug 53 is set in the wall of the cup 12, its inner end projecting into as close proximity as may be to, without touching the ring 33, as clearly shown in Fig. 1, an this plug is connected by a wire 54, with one contact piece of a switch 55, the switch being connected by a wire 56 with the ground wire 52.

For reversing the flow of the magnetic current at each half revolution of the permanent magnet 1, a plug 57 is provided, passing centrally through the plate 39, of insulating material, and provided at its inner end with a hollow cylindrical portion 58, which surrounds the roller 25, hereinabove referred to on the end of the piece 23, attached to the end of the armature 16. The said roller is permitted a free movement within the cylindrical portion 58, in the direction of the vibratory movement of the armature 16. The roller 25 has engaged with one side thereof, a tappet 59, which latter is secured to a band spring 60 which surrounds the cylindrical part 58 of the plug 57, the said teat having a limited 1 full lines Fig. 1,

movement back and forth through the wall of the said cylinder 57. Thismovement of the tappet, is not quite equal to the distance between the axis of rotation of the magnet 1, and the center oft-he roller 25, when the armature is in contact with two d agonally opposite branches of the pole pieces, as shown in Fig. 1. It, therefore, follows that when the armature 16 is bodily rotated, together with the magnet 1, and assuming it to be in the position shown in y it will gradually depress the teat 59,- the spring 60 yielding until the teat has reached the limit" of'its outward movement through the wall of the cylinder 57, and the further rotation of" the magnet with the armature 16, will force apart the armature 16 and "the diagonally .located branches of the pole pieces with which it is in contact. and the magnet l, having now nearly completed a half revolution, the "armature will be free to .vibrate into contact with the other diagonally opposite branches of the pole pieces and into this position it will be promptly thrown by the pressure of the spring-actuated tappet 59, just as soon as thereis a separation between the ar1nature' and the pole pieces with which it was previously in contact. It is to be understood that the tension of the spring 60 is not quite suflioient to force a separation between the armature and the pole pieces with which it is in contact, but as soon as this separation is made, the tension of the spring will complete the vibratory movement of the armature with great promptness and the flow of the magnetism will then take place as indicated by dotted arrows, Fig. 1, viz: in a reverse direction from that in which the magnetic current flowed when the armature was in the position shown in full lines, Fig. 1. The same operation and reversal of flow of the flux or magnetism, will again take place at the next half revolution of the permanent magnet 1, and so on. A

, spark gap between the terminals 61 and 62, is provided for takmg care of over-charge,

the terminal 62 being grounded to the cap 3.

. The rim 10 has attached thereto, a lever arm 63, see Fig. 2, for rotating it, and hence ,the segmental ring 13, and plug 57, carrying the tappet 59, to advance and retard the spark as may be desired. The rotary movement of the rim 40, and hence the segmental ring 43, is unlimited save only by the testing of the cables connected with the several plugs and provided these cables are made sufficiently slack, it may be given a com- ,plete revolution and the parts brought back into the same relation as when it started its rotary movement. The toothed wheel 38, keeps the connection at all times complete between the yielding rim 33 and the segments of the ring 13, and the yielding rim 33is, in turn, at all times in electric connecacross the 1u'mp1ng by tion with the coil through the wire 28, and the springs 29, which connect the said wire with the yielding rim 83. i

It has been found in practice thatthe structure hereinabove explained produces an intense spark of long duration, this long duration of the spark being due, as applicant believes, to the fact that the magnetism produced in the coil is opposed to the magnetism in the armature at the time ofthe break in the metallic magnetic circuit, and this opposition is continued by the reversal of the Jnagnetiocircuit in the armature'so that when the spark is produced by breaking the closed magnetic circuit through the armature,which introduces a high potential surge in the coil, the current is maintained spark gap after the primary the opposition of magnetisms hereinabove mentioned. Applicant further believes that in the successful ignition of compressed charges of gas in the larger cylinders in common use, there is not only ignition required, but detonation, or at least semi-detonation, and hence the value of a long continued intense spark for this purpose. a

Itis-obvious that changesmight be resorted to in the form and arrangement of the several parts without departing from the spirit and scope of my invention; hence I do not wish to limit myself strictly to the structure herein shown and described, but

\Vhat I claim is:

1. In a magneto, a permanent magnet, a coil and pole pieces mounted to rotate together and a vibrating armature mounted to rotate with the aforesaid elements and located, in cooperative relation to the pole pieces.

2. In a magneto, a permanent magnet in the form of a ring, a coil of annular form located within the ring magnet, pole pieces between the coil and permanent magnet and a vibrating armature within the annular coil, the several elements being connected to rotate together.

3. In a magneto, a permanent magnet, a coil and pole pieces in fixed relation to one another and mounted to rotate and a vibrating armature having its axis of vibration transverse to and passing through the axis of rotation of the aforesaid elements.

In a magneto, a rotating permanent magnet and coilin fixed relation to each other,- U -shaped pole pieces extending between the coil and permanent magnet with their branches directed toward the axis of rotation ofthe permanent magnet and a vibrating armature mounted to rotate with the permanent magnet and having its opporotary permanent magnet, coil and pole of the pieces, of a rotary armature mounted to vibrate and mechanical means for separating the armature from its contact with the pole pieces and causing it to vibrate.

6. In a direct current high tension magneto, the combination with a rotary permanent magnet, coil, pole pieces and armature,

of. means for positively moving the armature and thereby reversing the flow of the magnetic current during a revolution of the magnet.

7. In a magneto, a rotating permanent magnet, a coil, pole pieces and armature, the said armature being mounted to vibrate between the pole pieces, a spring-actuated yielding piece supported independently of the rotary armature, and a piece connected with the armature and bearing on said yielding piece for separating the armature and the pole pieces with which it is in contact as the armature rotates.

\ 8. In a magneto including a permanent magnet, a coil, pole pieces and a rotary armature mounted to vibrate between the pole pieces, a piece having a limited yielding movement under spring-tension in a direction laterally with respect to the axis of r0 tation of the armature and means for plac ing the armature under the control of the said piece having the yielding movement, for positively separating the armature and the pole pieces with which it is in contact.

9. In a magneto including a permanent magnet, coil, pole pieces and rotating armature, the said armature being mounted to vibrate between the pole pieces, a springactuated piece having a limited movement in a direction lateral with respect'to the axis of rotation of the armature, and means for placing the rotary armature under the control of said yielding piece, the said yielding piece serving to positively separate the armature and pole pieces with which it is in contact during the rotary movement of the armature. and the said yielding piece further serving to vibrate the armature into contact with the opposite pole pieces.

10. In a magneto including a permanent magnet, coil, pole pieces and rotating armamature mounted to vibrate between the pole pieces, a roller attached to one end of the armature, and a spring-actuated tappet mounted in position to engage the roller, the said tappet having a limited movement transverse to the axis of rotation of the armature of less extent than the distance between the center of said roller whereby the said "armature, and the pole pieces with which it 1s in contact will be forced apart during the revolution of the armature.

. 11. In a magneto including a rotary permanent magnet, coil, pole pieces and armature, a rim in electric connection with the coil and connected to rotate with the coil, the said rim being provided with a series of perforations, a ring separated into segments insulated one from another and provided with a series of perforations corresponding to the aforesaid series of perforations in the rotary rim,a toothed wheel held in position between the rim and the ring by the engagement of its teeth in said perforations and adapted to conduct the current from the rim to the segments and means for adjusting the segments in different rotary positions.

12. In a magneto including a rotary permanent magnet, coil, pole pieces and armature, a perforated rim electrically connected with the coil and secured to rotate with the permanent magnet and coil, a perforated ring separated into insulated segments and mounted in rotary adjustment opposite the said. rotary perforated rim and a toothed wheel held in position by the engagement of its teeth with the said perforated rim and ring for, transmitting current successively to the segments.

13. In a magneto including a rotary permanent magnet, coil, pole pieces and armature, and a rim fixed to rotate with the magnet and coil and in electric communication with the coil, a r'ng separated into insulated segments and held. in constant electric communication with the said rim, an annular rim insulated from said segmental ring and an annular seat in which said rim is mounted, the said rim being provided with a V- shaped external surface and the said seat being provided with a tapered surface for engaging one side of the V-shaped portion of the rim and an annular retaining ring arranged to force the rim into the desired bearing contact with its seat.

In testimony, as my invention, I have signed my name in presence of two witnesses, this seventh day of Nov. 1914:. J ED SHERIFF.

lVitnesses:

M. MonAmsLL, FRA w w Jacons.

that I claim the foregoing

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