US2230007A

US2230007A - Magneto generator

Info

Publication number: US2230007A
Application number: US141943A
Authority: US
Inventors: Edward B Nowoslelski
Original assignee: Bendix Aviation Corp
Current assignee: Bendix Aviation Corp
Priority date: 1937-05-11
Filing date: 1937-05-11
Publication date: 1941-01-28
Anticipated expiration: 1958-01-28

Description

Jail 28, 1941- E. B. Nowosn-:LsKl 2,230,007

MAGNETO GENERATOR Filed May 11, 1937 3 Sheets-Sheet 1 INVENTOR. Olmes/s: fdwa/fd.

. TORNEY.

Jam 28, 1941- E. B. NowosIELsKl MAGNETO GENERATOR Filed May l1, 1937 3 Sheets-Sheet 2 INVENTOR.

Jan 28, 1941- E. B. NowoslELsKl 2,230,007

MAGNETO GENERATOR 3 Sheets-Sheet 5 Filed May l1, 1937 l INVENTOR. fda/715665. /lmuosllelki/ BY MR/imi? Patented Jan. 2s, 1941 A '2,230,007

yUNITED STATES ra'rlsmV OFFICE MAGNETO GENERATOR Edward B. Nowosielski, Sidney, N. Y., assignor to Bendix Aviation Corporation, South Bend, Ind., a corporation of Delaware Application May 11; 1937, serial No. 141,943

s claims. (c1. 1v1-i269) The present invention relates to a magneto chamber 2, a breaker mechanism chamber 3 and generator and more particularly to an ignition a distributor mechanism chamber 4. generator for n'iulti-cylinder4 internal combusl Two

groups

5 and 6 of circularly arranged tion engines. 'arcuate permanent magnets (Fig. 4) are flxedly It is an object of the present invention to promounted in the ends of the generator chamber 5 `vide a novel form of, high tension magneto which 2 with

pole pieces

1 and 8 interposed between the lis emcient and reliable although small and light adjacent like poles .of the

magnets

5 and 6, said for its output capacity. pole pieces extending radially inward and being It is another object to provide such a device formed with arcuate surfaces 9 and II. Pole l0 which is capable of producing eillciently a large pieces 'i and 8 of like polarity are connected by I0 number of sparks for each revolution of vthe bolts I2 traversing the end partitions I3 and I4 driving shaft. I of the generator chamber for maintaining the It is a furtherobject to provide such a de- -parts in assembled relation. vice which employs a plurality 0i small nxed The generator chamber is formed in two secmagnets, the ux from which is caused t0 com.. tions joined as indicated at I0, and an induction l5 bine and reciprocate through/he core of a, stacoil I5 is mounted in the central portion theretionary coil a plurality of times for each revolu- Of. being rigidly held in D0Siti0l1 by the Clamping .tion of a rotor. action of the bolts I2.

It is another object to provide such e, device A drive shaft I6 is journalled at I'i andi in v which 1S readily adaptable for use ln connection the partitions I3, I4 and carries rigidly keyed 20 with engines having various numbers of cylin.. thereon in any suitable manner as indicated at ders. I9 and 2| an inductor member comprising a It is another'objeef; to provlde Such a device laminated cylindrical core member 22 traversing which ls completely enclosed and shlelded ln a the induction coil I5, and lamlnated c1rcular substantially smooth and symmetrical casing. pole* members z3 and 24 xedpn @he ends 0f the 25 It ls another Object to provide such a device core and having arcuate prolections 21 and `2B ln Whleh the' magnets and con are stationary, adapted to cooperate w1th the pole p1eces land the reversals of ux being secured by rotation s of 'the permaqent-magnets In 'the arrange' of a comparatively light rotor, and the magnetic ment illustrate@ m Flg' 4' there are eight Perma' circuit through vthe coil being completed by magnent magnets m each '

group

5 and 6 and ac' 30 netic conductors surrounding the coil, thus incordmgly elght

xed pole membes

1 and 8 creasing the inductive effect thereon. gllrege; roclrllasclluagmjole pahrmbltsfoiigvgggigutanan tions 21 and 28 respectively, which projections of each pole member are accordingly adapted 'to 35` liuon mth the accompanying drawings in simultaneously cooperate with the fixed pole Fig. 1 is a vertical substantially mid-sectional pieces of hke pma'nty' The projectlons 2T of view of apreferred embodiment of the invention; pole member z3 are staggered rotaly with respect tothe projections 28 of pole member 24 40 lil 22 ifamsgeclfm taken substantlany on the whereby when theI pole member 23 is in induc- 40 tive relation with the xed pole pieces 'i of one Fig' 3 is a' Sectlon taken Substantlauy on the polarity, the pole member 24 is in inductive reune of Fig- 1; lation with the xed pole pieces 8 .of the oppo- F1g- 4 1S a detail m Perspecmve 0f the elements site polarity. Closed magnetic circuits are thus forming the magnetic circuits 0f the device? provided for the flux from all the permanent 45 Fig. 5 1S a detail in DeXSpectiVe 0f an element Y magnets, said flux flowing 'in one direction 0f the megnetl Inductor; through the core 22 of the rotor and returning Fig. 6 1s a detail in perspective 0f one 0f the through the exterior path formed by the bolts permanent magnets employed: and l2 surrounding the induction coil as indicated Fig. '7 is a detail in perspective of one of the by the arrows in Fig. 4. 50 fixed pole pieces interposed between said mag- The breaker chamber 3`of casing I contains nets. breaker mechanism indicated generally by nu- Referring rst to Fig. 1 of the drawings, there meral 29, and drive shaft I6 projects into said is illustrated) a generally cylindrical casing I chamber and carries a. cam 3| xed thereon for comprising three chambers, namely a generator operating the breaker mechanism. The breaker 55 gli mechanism is connected to the primary winding' of the coil l5 by a conductor 32, and the breaker points are shunted by a suitable condenser 33 in the usual manner.

Distributor mechanism indicated generally by numeral 3Q is mounted in the distributor chamber i of the casing and comprises a distributor rotor 35 journalled as indicated at St in the casing and provided with a conductor Si electrically connected to a central electrode 38 and arranged to cooperate at its ends with a plurality of output electrodes 3Q and All. The central electrode Sii is connected by a conductor i2 with a high tension cable @3 coming from the secondary winding of the induction coil i5. The electrodes Sill, 39 and il and conductor d@ are preferably molded in a cup M of suitable dielectric material which is retained in the chamber l by any suitable means as indicated at (l5.

The distributor rotor 35 is actuated by the drive shaft i6 through reduction gearing of such ratio as to adapt the'- device for the particular engine installation contemplated. Thus, inthe embodiment illustrated, the device is adaptedfor the ignition of a fourteen-cylinder engine. There are accordingly seven electrodes 39 and seven electrodes 4l, and gearing is provided whereby the distributor rotor is driven at a ratio of 4:7 with respect to the drive shaft.' As here shown, this is accomplished by mounting an external gear i6 on the drive shaft in position to mesh with an internal gear i'l journalled as indicated at All in therchamber and fixed to the rotor i5 by means of a cap screw B8, the proper timing relation between the gear and distributor rotor being secured bysvuitable means such as a dowel 39.

In the operation of the device, rotation of drive shaft i6 causes the

inductor rotor

22, 23, 263 to rotate therewith, causing the pole shoes 2l, 2a thereof to cooperate'alternately with the xed pole pieces l and il of opposite polarity. The ux of the permanent magnets 5 and t is thus caused to reciprocate through the core 22 of the inductor member eight times during each revolution of the drive shaft and thereby induce currents corresponding thereto in the coil l 5, the magnetic circuits being completed through the bolts l2 surrounding the coil and thereby augmenting the inductive effect therein. The cam 3l operates the breaker mechanism 29 to lopen and close the primary circuit-of thecoil in the usual manner, and the secondary impulses so generated are conducted by the cable d3 to the distributor rotor 35. Since the rotor 35 is geared to make one revolution while the inductor is making one and three-` quarters revolutions, there will be fourteen impulses generated for each revolution of the rotor, which accordingly serves to properly distribute the same to the spark plugs of the engine to be ignited. f

It will be readily understood that this arrangement is very flexible as respects adaptation for various engine installations, since it is merely necessary to change the distributor cap and/or vary the ratio of the

reduction gearing

46, 41 in order to use this device for the ignition of engines having various numbers of cylinders. The numbers of permanent magnets used may also be varied widely without changing the basic design of the device, inasmuch as neither the magnets-nor the coil rotate, the only rotating element being the inductor which is of simple `design, symmetrical and easily balanced.

Although but one embodiment of the invention has been shown and described in detail, it will be understood that other embodiments are possible and various changes may be made vin. the design and arrangement of the parts without departing from the spirit of the invention as de- 5 'lned in the claims appended hereto. What is claimed is:

l. In a magneto, a sectional casing, a plurality r of magnets arranged therein in spaced annular groups, an induction coil interposed between said l groups coaxial therewith, a drive shaft traversing concentrically said coil and magnets, an inductor rotor xed on said shaft arranged to conduct the ux from said magnets through said coil, and a plurality of bolts arranged about the pel riphery of the coil forunifying the casing and serving as a return path foi-the flux traversing the coil.

2. in a high tension ignition magneto for internal combustion engines, a plurality of arcuate magnets arranged in spaced annular groups with like poles adjacent, fixed pole pieces between said poles and extending inwardly therefrom, a xed induction coil -lccated between said groups of magnets coaxially therewith having a. hollow core, and a rotary inductor of highly permeable material comprising a cylindrical portion traversing said core, and pole members at its ends arranged to cooperate with said fixed pole pieces.

3. In a high tension ignition magneto for internal combustion engines, a plurality of arcuate magnets arranged in spaced annular groups with like poles adjacent, xed pole pieces between said poles and extending inwardly therefrom, a lxed induction coil located between said groups of magnets coaxially therewith having a hollow core, and a rotary inductor of highly permeable material comprising a cylindrical portion traversing said core and circular pole members at its ends having pole shoes arranged so that each pole member cooperates with a group of pole pieces of like polarity, the arrangement being such that the two pole members simultaneously cooperate with groups of pole pieces of opposite polarity.

d. l'n a high tension ignition magneto for internal combustion engines, a plurality of arcuate magnets arranged in a pair of coaxial spaced annular groups with like poles adjacent, lxed pole pieces between said poles and extending inwardly therefrom, a xed induction coillocated between said groups of magnets coaxially therewith having 'a hollow core, a rotary inductor of highly permeable material comprising a cylindrical portion traversing said core and circular pole members at its ends arranged to cooperate with said xed pole pieces, and means forming a yreturn path for the flux traversing the inductor. A

5.k In a high tension ignition magneto forinternal combustion engines, a. plurality of arcuate magnets arranged in a pair of coaxial spaced annular ygroups with like poles adjacent, xed pole pieces between said poles and extending inwardly therefrom, a xed induction coil located between said groups of magnets coaxially therewith having a hollow core, a rotary inductor of highly permeable material comprising a cylindrical portion traversing said core and circular pole members at its ends arranged to cooperate with said fixed pole pieces, and a plurality of bars of highly permeable material arrangedperipherallyto said coil connecting pairs of said pole piecesl of like polarity ln said groups.

6. In a. high tension magneto generator, a cas'.- ingcomprising threevv substantially cylindrical 75 chambers arranged end to end. one chamber containing generating means including a coil, iixed magnets, and an inductor causing the ilux from the magnets to reciprocate through the coil; 5 breaker means `in the second chamber including a cam; distributor means in the third chamber including a rotor, a conductor traversing the breaker chamber transmitting the output of the coil to the distributor mechanism, a shaft journalled in the casing carrying and rotating the inductor and cam, and gearing connecting the shaft to the distributor rotor for driving it in 5 timed relation to the inductor and cam.

EDWARD B. NOWOSIELSKI.