US898370A

US898370A - High-tension magneto.

Info

Publication number: US898370A
Application number: US35264807A
Authority: US
Inventors: Edward B Jacobson
Original assignee: PITTSFIELD SPARK COIL Co
Current assignee: PITTSFIELD SPARK COIL Co
Priority date: 1907-01-16
Filing date: 1907-01-16
Publication date: 1908-09-08
Anticipated expiration: 1925-09-08

Description

PATENTED SEPT. 8, 1908.

E. B. JAOOBSCN. HIGH TENSION MAGNETO. APPLICATIQN FILED JAN.1G,1907.

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No. 898,370. PATENTED SEPT. 8, 1908. E. B. JAGOBSON' HIGH TENSION MAGNETS.

APPLIUATION'II LED JAN.16, 1907.

E SHEETS-SHEET 2 FATENTED SEPT. 8, 1968.

E. B. JACOBSON.

HIGH TENSION MAGE ETO.

gruonlon FILED JAN. 16, 1907.

4 SHEETSSHEET 3..

FATENTED SEPT. 8, 1908. AOQBSON HIGH TENSIDN MAGNETO.

AM I r 4 SHEETS-SEEET 4.

LGATiON FILED JAN.

Q w mu w il' i Jud H EDWARD B. JACOBSON, OF PITTSFIELD, MASSAUHL'SETTS COIL COMPANY, U)? Pl'lTSFlliLl), MASSACHL'M HIGH-TE NSION MAGNE T0.

N0. seasro.

Application filed January 16,

Specification of Letters Patent.

Patented Sept. 8, 1908. 1907. Serial No. 352,648.

To (ZZZ whom it may concern: 1 Be it known that l, EDWARD B. .liiconsoN, a of the United States of America, re l sw ne; at Pittslicld, in the county of Bork a 'e and State of Massachusetts, have in- Vented neu and useful inmrovemcnts in iligh iension Magnetos, of which the l'ollown is a specification. I Tnis invention relates to imprwemcnts in l electric generators of the t 'pe known as Inagl neto-generators for pro ucing alternating currents of high voltage, and is designed par- I ticularly for igniting the charge of an internal combustion engine Where it is highly desirable and absolutely necessary that every char e should be thoroughly ignited in order to obtain the best results.

The object of the invention is therefore to provide a magneto electrical generator that will successfullyignitc the combustible charge Without failure.

intention consists broadly in combintfith series permanent magnets of a magneto a rotatable screen composed of magnetic and nonuncgnetlc portions by which the hues of force that pass from one pole piece to another can be directed from the soft iron pole pieces through the windings of the armature, and also in providing means for suitably rota ing this screen whereby the electro-1uotive force generated in the armaone he suitably varied.

Further details of the object and nature of invention will be fully set forth in the deof the invention.

' LWlIlgS forming part of this appl1 we 1 is a vertical longitudinal ew or the generator in a vertical sing through the of the armau, end the secondary shaft and distributor re hanism. Fig. 2 is a sectional elevation is dotted line 22 of Fig. 1 through the iiis'trih'uter contact ring and distributor. 3 is an end elevation of Fig. 1 showing the mute and break mechanism after the re more of the housing therefor, also showing the Std 13R88O0I1t1Ct-plitt8. Fig. 4 is a vertical. transverse sectional View of the magneto on the line 4---4t, Fig. 1, showing the two windings on the armature, the cylindrical screen, end the condenser. Fig. 5 is a dia g .in'nistio View of the wiring of my magneto. .EL 6 38 a perspectiveyi'ew or the armature 5 core and screen the screen being indicated as made of separate pieces.

Referring to those drawings in detail, a and b designate the series of permanent magnets, the magnet being preferably shorter than tho magnet a. The lower end of the magnets (1. rests on the uppcrsurl'ace ol the base-piece c.

d designates the soft iron polo pieces that are permanently secured to the magnets a and b by any suitable means, as by machiuescrews.

The base-piece c is secured to the polopieces (1 by .nioans of the bolts (:1. The threaded openings 6' provide means for fixedly securing the machine to a permanent support.

f designates a bridge picco, preferably made of aluminium, and mounted on the upper end of the polo-pieces (I, as indicated at the point 1. total ably mounted within the polo-pioces (l is a cylindrical shell or screen i which composed of magnetic and non-magnetic material,- the portion 2' being 11011- nnignetic and the portion magnetic, as soft iron or steel. The screen or shell h is provided with a handle It so that the same may be readily rotated. Mounted on the bridgepice fis a condenser 76 of suitable capacity 80 and contained within the housing is.

m' designates the armature having two windings n and 0,-n being the primary winding, and 0 the secondary Winding.

0 designates suitable binding or insulating material. v

The right-hand end of the armature m is provided with a spur gear p for engagement with another s )ur mounted on a suitable rotating shaft of the motor, the gear 3) being of such diameter that the rotation of the armature shaft may be accurately timed in relation to the movements of the engine pistons, as readily understood. The lefthand end of the armature m is n'ovidod with 9.5 a metallic sleeve (1 that is rigidly fastened to the armature head 1". sleeve g is a bushing 8 material, as fiber or rubber, and mounted Within the bushing is a metallic cylindrical brush-holder tfor receiving the carbon brush u and compression s )ring '21 for maintaining the brush u extende w designates one terminal of the high tension winding that is connected with lo secondary windings oi the armature at one Mounted within this made from insulating end, and to the metallic c. 'lindrical brushholder t at its other end. The sleeve g and the shaft at are suitably mounted in ballbearings, as designated at y, of any approved design.

z designates a collector ring secured to the periphery of the armature and insulated therefrom by means of the ring 2. terminal of the rimary winding n is con nected to this ring, as designated by the numeral 3, and the other terminal is connected to the "condenser and grounded, as will be described.

4 designates a carbon or other suitable brush bearing on the collector ring 2 that is incloscd within the metallic cylindrical casing 5, which is internally threaded at its outer end and provided with a closing plug (5.

7 designates a compression spring for imparting to the brush 4 the requisite tension or pressure which engages the ring 2.

The metallic casing 5 is electrically connected to the condenser is by means of the wire 8. The metallic cylindrical casing 5 is also electrically connected to the advance contact-plate 19, engaging which is an advance brush 20 (preferably carbon) mounted within the metallic cylindrical casing 21 which is provided with a closing plug 22 and a compression spring 23, the latter serving the purpose of holding the brush 20 in good electrical contact with the advance contact plate19.

24 designates a supporting plate for the metallic cylindrical casing 21, and also provides supporting means on the upright part 24 for the contact screw25,said supporting means being designated by the numeral 26,

and held in place on the plate 24 by the screw 27. Rotatably mounted on the supporting plate 24 is a make and break lever 28 y means of the pin 29, the lower end of the lever 28 being provided with an anti-friction roller 30 that engages a make and break cam 31 mounted on the armature shaft w. The upper arm of the make and break lever 28 carries the ordinar platinum contact point 32 which engages t 1e opposite contact-point 25. 33 is a tension device for engaging the lower arm of the make and break lever .28 for placing suitable pressure on the lever. 'lhis tension device is adjustably mounted in the lug 34, as shown.

In order to vary the time of the spark, the plate 124 on which the make and break lever 28 is mounted is rotated. 'lhis rotary movement has the effect of moving the roller 30 either towards or away from the make and break cam 31 on the shaft 1:, according to whether the operator wishes to advance or retard the spark. At the same time that the plate 24 is moved, the brush 20 moves or slides upon the advance contact plate 19.

Mounted in

roller bearings

35 and 36 is a secondary shaft 37 that is geared to the pin- One seasvo ion 38 on the armature sleeve g by means of the gear 40 which carries a plate 41 of insulating materiai to which is secured the distributer 42 which is made of some suitable insulating material, as hard rubber. Extending through this distributer 42 and about onehalf way through the plate of insulating material 41 is a metallic cylindrical brush-holder 43 in which is mounted the compression spring 44 and brush 45 that normally engages a on -shaped metallic contactiece 46 mounte on the 11 per end of the exible transfer plate 47 whic is secured to the insulated distributer contact ring 48 b r means of the screw 49. The transfer piate 47 extends below the ring 48 and carries at its lower end another cup-shaped metallic contact-piece 50 similar to the oneat its u per end, and with wh ch-the brush a normal y engages. The distributer arm 42 also carries a brush-holder 51 which is electrically connected to the brush-holder 43 see Fi l and contains a com ression spring 52 and brush 53 which norma y is in contact with the inner surface of 48, as shown. Mounted within the distributer contact-rin 43 and fiush with the inner surface thereoi are the distributer contact pieces 54 which are electrically connect ed to the sectional ring 55 that is secured to the distributer contact ring 48. The terminals of the cables 56 are connected to the sectional ring iece'55 whereby the current from the brus 53 can flow in succession through the contact-pieces 54 to the cables 56, as the distributer 42 is rotated.

Referring to Fig. 5 which is a diagrammatic view of the wirin'g,-57 desi ates the usual spark-plugs that are screwe into the casing of the combustion cylinders. The

wires 58 shown connected to the plugs 57 and to the wire 59 in reality re resent the grounder framework of the mac nne.

6O designates a wire connected with one terminal of the condenser 7c and the other terminal with the ground or framework of the machine. This wire is also connected to the primary winding n and to the secondary winding 0 of the armature, as shown. As the armature rotates, the current is generated in the rimary winding 'n and passes from the brusi 4 through the advance'contact-plate 19, brush 20, contact-points 25 and 32' (when the same are closed) through the wire 59 (framework of the machine) wire 60, to the op osite terminal of the condenser k to charge tie same, and when the contact oints 25 and 32 are 0 en, the condenser 7a will be discharged in t ie opposite direction through the wire 60, primary winding n, in-

the insulating ring thumb-nut 65 for convenience in removing terminal of the the same, as readily understood.

In the operation of the machine, it should be stated that the roller is not in contact with the cam 31 most of the time so that the contact points 25 and are closed, and that just at the moment "that the contact points are separated the condenser is discharged and he spark produced.

What I claim, is

1. An electric generator having in combination an armature )rovided "with two windings in inductive relation to each other, compound field magnets, condenser included in the prim winding, a make and break mechanism in the primary, spark terminals, a distributor mechanism interposed between the secondary winding and one of the spark terminals, and an electrical conncction extending between the other spark terminal and the secondary winding, and means for varying the magnetic ilux thrcughthe armature whereby the electro-niotive force produced may be varied, said means including a rotatable screen, the cylindrical surface of which is composed entirely of magnetic and non-magnetic material and having unbroken outer cylindrical surface, as described.

2. An electric generator having in combination an armature having primary and secondary windings thereon, field magnets, a collector ring carried by the armature, one primary connected thereto, the other terminal of tie primary being grounded, a second ground connection connected to the collector ring, a and break mechanism interposed bet-ween the collector ring and the second ground connection, the secondary windin hardng ter minal connected to a spark-ping end its other terminal grounded, and means ior varying the magnetic llux through the arn'iature whereby the electroqnotive force produced may be varied, said means including a rotatable screen, the cylindrical surface of which.

is unbroken. from end to end,

3. An electric generator having in combe nation, a compound iield magnet, an armature provided with. prin'iary and secondary windings, an armature shaft, a secondary shaft operatively connected to e armature shaft, a dist-ributer connected to s, terminal of the secondary vJi .dirq a contactpiece adapted to be n v -1 3 en eged 0y toe testimuter, spark terminal connected with contaet-piece, an electrical connection tending between the spark terminal and the exthe other terminal of the secondary, a collecter,.

t'ac', as described.

4. A magneto electric generator having in combination an armature mary and secondary windings, a rotatable screen interposed between the pole pieces and the armature, said screen eing composed of magnetic and non-magnetic material -whereby the inductive effect of the field on the windings may be changed, a condenser connected in the primary winding, means opcrativcly connected to the armature shaft for electrically connecting the sec ondary winding to the external circuit, conducting devices interposed between the external circuit and the pe'imary and secondary windings, a make and break mechanism included in the circuit of the primary, the niche and break device including a rotatable supporting plate, and an upright, as: 24, forming a part thereof, alever pivoted to the supporting plate and provided with a roller at one end, a cam for engaging the roller, and acontact-point and brush "arried by the upright, the brush being electrically connected to the. primary, as described.

5. An ele rtric generator having in combination an armature, a shaft therefor provided with primary and secondary windings, a secondary shaft operatively connected to the armature shaft, a make and break mechanism included in the primary circuit, means for ad ancing or retarding the operation of the make and break mechanism, a distributcr carried by the secondary shaft, elecral connec 'ns between the external cir cuit and the primary and secondary windings, a condenser connected to the external circuit, and'means for varying the magnetic ilUX through the armature whereby the elec tie-motive force induced in the secondary may be varied, the distributor com n'ising a nah-holder electrically connected to the :lary winding, a second brush. iohlcr in electrical connection with the sec ondery, a sectional ring connected to the ere provided with pri-' nets, an arinature, primary and secondary wmdlngs thereon, a rotatable screen located between the ma'gnet s.and armature and com posed oimagnetie'itnd non-magnetic materials,' the nonmagnetic material being formed from a single integral piece and having an opening in which is fitted the magnetic 'iece fiuslrwith the outer surface of the cylin er, and means for rotating the same,

. whereby the flux through the armature may be varied, as described.

7. A magnetic electric generator having in combination a series of permanent magnets, one end of the armature being provided with a sleeve, a bushing of insulating material Inouhted Within said sleeve and carrying a metallic cylindrical brush-holder, the same being electrically connected to the second- EDWARD B. JACOBSON.

Witnesses:

HIRAM B. WELLINGTON, Jr., HIRAM WEITLINGTON.