US1401571A - Magneto - Google Patents

Description

J. A. WILLlAMS.

MAGNETO. APPLICATION FILED rEB, 2. 1920.

1,401,571, v Patented Dec. 27, 1921.

3 SHEETS-SHEET l.

J. A. WILLIAMS.

MAGNETO.

APPLICAIION FILED FEB, 2, 1920.

1,401,571. I Patented Deu.27,1921.

SHEETS-SHEET 2- warren stares rarest assist.

JOSEPH A. WILLIAMS, CLEVELAND, OHIO.

MAGNETO.

To all whom it may concern":

Be it known that I, JosnrH A. WILLIAMS. a citizen. of the United States, residing at Cleveland, in the county of Quyahoga and State of Ohio, have invented a certain new and useful Improvement in Magnetos, of which the following is a full, clear, and exact description. i

This invention relates to magnetos, especially oflthe inductor crossed rotor type forming the subject matter of my prior Patent No. 854,321, granted to me on the 21st day of May, 1907. The principal object of the invention is to decrease the costv of manufacture of mag- .netos of the above-named type, and to provide a construction which is easy to assemblefwhich requires relatively little machine work and when assembled possesses to a high degree the feature of rigidity.

Further the invention aim to provide a construction which permits the use of a winding, large in diameter, i. 6.. radially or transversely considered, thus affording better space for insulation. I

Still further the invention aims to improve the facilities for oilingthe various bearings, andcto provide an oiling system wherein lubricant is supplied at one point only, is

conducted to, and amply lubricate's the bearings of both the rotor and distributor. The invention may bebriefiy summarized as consisting in certain novel details ofconstruction, and combinations and arrangements of parts'which will be described in the specification and set'fo'rth in the appended claims. V

Inrthe accompanyingsheets of drawings wherein I have illustrated the preferredembodiment of the invention, Figure'l is avertical and longitudinal sectional view of my improved magneto; Fig. 2 is an end. view looking toward. the distributer and circuit breaker end with. the circuit breaker cap broken away; Fig. 3 is a transverse vertical sectional view taken substantially along the line 3-3 of Fi-gr 1; Fig. 4: is a horizontal sectional view through the top part of the magneto, the section being taken substantially along the line 4 4 of Fig. 1; Fig. 5'

is aniend view of the rotor; Figs. 6 and 7 are erspectivegviews of the two parts of the ousin and Fig. 8 is a sectional view throug the housing member of Fin-. 7, the section being taken substantially al ong the Specificationof Letters Patent Patented Dec. 27; 1921.

' Application filed February 2, 1920. Serial No. 355,588.

line 7-7 of Fig. 1 looking in the direction indicated by the arrows.

ing to be referred to presently, this shaft carrylng a rotor having two active flux diverting or controlling portions 18 spaced axially of the shaft and separated bya reduced portion 18 whi'ch is surrounded by the stationary windings of the magneto.

These windings include a primary 14, and

a secondary 15 in a circular casing 16 fitted around the reduced portion of the'rotor and supported centrally in a two-part'housing,

the casing having at the top an upstanding neck 16 through which is carried a secondaryterminal '17 connected in the customary manner to a contact of the distribu ter rotor 18' having a sleeve or barrel-like extension 18 'journaled in a bearing 19. The distributer is rotated in the customary manner by gears 20 and 21, the" latter being on the rotor shaft 11, and the rotary parts of the distributer are inclosedin a distributer cap 22 normally secured in place by suitable clamps 23, and carrying the stationary distributer contacts.

One terminal of the primary 14 is carried axially at the bottom of the machine by a conductor 24, and at its outer end is con nected to the equivalent of a binding post screw 25, whose inner end is connected to a conductor 26 carrying a stationary circuit breaker con-tact the movable contact being :mounted on a-pivoted arm 27 shifted by a cam 28 on the rotor shaft. The circuit breaker pa'rts'including the contacts and arm '27 are carried by, and are removable as a unit with a cup-shaped casing member E29 fitting into'asuitably shaped part of one of the housing members, this casing member 29 being closed by a circular cap 30 which can be removed when the conductor 24 is disconnected and turned to one side. The cap 30 carries a spark advance or retarding arm 31 which can be rotated in the customary manner. The inner edge of this cap has at its inner'margin a series of uniformly spaced lugs which fit into notches" at the periphery of the breaker casing member 29, and the cap 30 can be initially positioned so that the advance and retardingarm 31 may be positioned on either side of the mag neto.

Coming now to the parts in which the present invention is more directly involved, I will first describe the construction of the housing. In this improved magneto the housing which completely incloses the rotor and windings and supports the rotor as well as distributer and circuit breaker is composed of two parts or members 32 and 33 which are fitted together, end to end, the adj acent ends of the two housing parts having a rabbeted joint formed by overlapping inter-fitting parts indicated at 34L in Fig. 1, and the meeting faces being at substantially the center of the magneto and being in a plane at right angles to the rotor axis. The housing member 33 has an extension 33 shaped to support and partially inclose the distributer and circuit breaker. These housing members which are formed of non-mag netic material such as brass, have cast integral with them, pole pieces 3% of magnetic material. Each housing member has two pole pieces similarly disposed in the upper half thereof, each pair being set ninety degrees apart and being, of course, completely separated by the non-magnetic material. By reference particularly to Figs. '6 and 7, it will be seen that the inner or adjacent parts of the two housing members have circular recesses 36 to accommodate not only the rotor but the casing 16 inclosing the windings, each side of the casing 16 being adapted to be seated against machined inset shoulders 23% of the pole pieces 3 as well as against shoulders 37 formed in the housing members. Between the pole pieces the top portions of the two housing members are notched out as shown at 38 (see particularly Figs. 6 and 7) so that when the two mem bers of the housing are fitted together there is formed a rectangular space of such size and dimensions as to accommodate the upstanding neck 16 of the windingcasing 16. By reference particularly to Figs. 1, 6. 7 and 8 it will be noted that the top portions of the housing members between the pole pieces are hollowed out, but this is not essential as it is done for the sake of lightness only. It is to be noted at this point that not only do the adjacent ends of the housing members engage each other, but the extreme ends of the two pairs of pole pieces carried by the two housing members respectively, are in engagement when the two housing members are fitted together so as to form in effect two continuous pole pieces which extend substantially the full length of the rotor.

The opposite sides of the upper portions of both housing members 32 and 83 have rectangular notches 39 to accommodate the lower ends of the magnets 10, 10, these notches extending inward to, and having their bases formed by the outer sides of the pole pieces 34, which outer sides are parallel, and are therefore engaged by the ends of the magnets when the latter are in position.

hen the two housing members are placed end to end in their proper relative positions and are fastened together by bolts 40 which are preferably tour in number, and extend axially through both housing members which are provided with suitable bolt holes etl shown in Figs. 5, 6 and '7, the mag nets 10, 1.0 can be placed in position by slipping their lower ends into the notches 39 over the outer faces of the pole pieces. When the magnets are in position they are spaced apart a distance slightly greater than the distance between the shoulders against which opposite sides of the winding casing 16 bear. in other words, the distance between the magnets, axially considered, is slightly greater than the space required to accommodate the windings and their casing. This pernits the use of windings of relatively large diameter, which is desirable in order that ample insulating space may be utilized between the turns or layers. In fact, the outside diameter of the winding casing may be substantially as great as the extreme width of the magneto.

When the magnets are placed in position as above described, they are held in their proper positions simply by a clamping band 42. (see Figs. 1, 3 and 4) which is slightly wider than the gap between the magnets and is fastened at its lower ends by screws or equivalent means 452 to opposite sides of the two housing members.

Before the magnets are placed in position, a casing or cap as is fitted onto the upper part of the two housing members to inclose the usual condenser 4%, the distributor connections and oiling tubes next to be described. This casing, which may be formed of sheet metal, is separated from the magnets whcn they are next placed in position by felt strips indicated at d5.

A further important feature of the invention resides in the provision for oiling the bearings. In accordance with the present in vention oil is supplied at one point only, this being at the top of the magneto. At this point there is provided a lubricant receiving cup or tube 46 which is normally closed by a cap 47, and which projects up through the top of casing 43, in the space between the magnets and through the magnet clamping strap 42. At its lower end the tube communicates with two tubes 48 and 49. One of these tubes 48 extends down to and communicates with a duct 50 in the end of the housing member 32, which duct leads to the bearing 12 supported in this housing member. The other tube 49 extends in the opposite direction from the tube 4-8 to the bearing 19 of the distributor. Below the distributei the bearing has a well 51 containing a wick, and leading from this well is a tube 52 which extends to the rotor shaft bearing 12 supported by the housing member 33. Thus lubricant supplied at one point located at the most convenient part of the magnetopasses by gravity to both the rotor shaft and distributer bearings which are all the bearings of themagneto that require lubricant.

. Having described my invention, I claim:

1. In a magneto, a housing adapted to support a rotor shaft composed of two members adapted to be fitted end to end with their meeting faces arranged transversely of the rotor axis, a pair of polepieces carried by each housing member, and magnets engagingsaid pole pieces.

2. A magneto comprising a housing adapted to support a rotor and composed of two members arranged end to end and having their adjacent faces transverse to the rotor axis, pole pieces cast integral with said housing members, and magnets having their ends engaging said pole pieces.

3. In a magneto, a housing, a rotor of the inductor type supported by the housing and inclo'sed thereby, stationary windings surrounding the rotor and likewise inclosed by the housing, said housing being composed oftwo parts fitted together end to end with their adjacent faces transverse to the rotor axis, said housing members each having a pair of pole pieces, and a pair of magnets having their ends engaging the outer faces of the pole pieces.

4;. In a magneto, a housing, a rotor of the inductor type supported by the housing and inclosed thereby, stationary windings surrounding the-rotor and likewise inclosed by the housing, said housing being composed of two parts fitted together end to end with their adjacent faces transverse to the rotor axis, said housing members each having a pair of pole pieces cast integral therewith, and magnets having their ends engaging the outer faces of the pole pieces.

5. In a magneto, a housing of non-magnetic material formed in two. parts arranged end to endwith their adjacent faces transverse to the rotor axis, a rotor supported by said housing, pole pieces cast integral with each housing member, each housing member 7 having on opposite sides notches which extend to the outer sides of the pole pieces, and a pair of magnets having their ends extending into the notches in engagement with the pole pieces.

6. In a magneto, a housing of non-ma-g-' netic material composed of two parts fitted together end to end with their adjacent faces transverse to the rotor axis, a rotor of the inductor type supported by the hous ing and inclosed thereby, said rotor having a reduced middle portion, primary and sec ondary windings, and an inclosing casing therefor surrounding the reduced portion of the rotor, the adjacent portions of the housing members being notched out to accommodate a portion of said casing, pole pieces cast integral with the two housing members and having their outer faces exposed at the sides of the housing members, and a pair of magnets having their ends engaging said pole pieces.

7. In a magneto, a housing of non-magnetic material composed of two members arranged end to end with their adjacent faces at right angles to the rotor axis, a rotor of the inductor type with crossed portions at right angles to each other and with a reduced middle portion supported and inclosed by said housing, windings, and a casing therefor surrounding the middle portion of the rotor, said housing members having pole pieces cast integral therewith and provided at their adjacent ends with notched out portions accommodating a portion of said casing, and provided on opposite sides with notched out portions exposing the outer faces of said pole pieces, and a pair of magnets having their ends fitted into said last named notches and engaging said faces of the pole pieces.

8. A magneto comprising a housing, a pair of permanent magnets, a rotor having hearings in the housing, a distributer having a bearing in the housing, and lubricant conducting means having a single inlet opening located between said magnets and extending to the bearings of both the rotor and the distributer.

9. In a magneto, a housing, a rotor having bearings in the housing, a distributer having a bearing in the housing, a pair of permanent magnets above the housing, oil conduct ing tubes within the magnets, and ducts extending from the tubes to the bearings of both the rotor and distributer, and an oil inlet at the top of the magneto between said magnets and communicating with said tubes.

10. A magneto comprising a pair of per manent magnets, a housing, and a rotor hav ing spaced bearings in the housing, and lubricant conducting means having a single inlet opening located between the magnets and extending to the bearings of the rotor.

In testimony whereof, I hereunto affix my signature.

JOSEPH A. WILLIAMS

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