US1201090A - Commutator. - Google Patents

Description

PATE "1 JOSEPH F. PARKER, OF MOILE, ALABAMA, VASSIGrK'B., BY DIRECT AND MESNE ASSIGN- MENTS, To rama.

I ldo'herebyV declare the following to be -a full, clear, and exact description of the invention,such as will enable others skilled in lthe art to which it appertains to make and use the same.

My present invention relates to improvements v1n commutators, and consists more 'particularly'in improvements and modifi-- cations of the device illustrated and described in my similarly entitled, co-pending application Serial No. 41127, filed July 21, 1915.

It is an object of the present invention to provide an improved commutator having all of the objects land advantages of my prior device illustrated in the application aforesaid, and which has been found to yield par'- ticularly excellent results on Ford automobiles; the several parts being arranged and constructed in such manner as to be adapted for application to the cam shaftof the motorl without alteration or change therein; al-

though it will be understood that the present invention may have a wider application and give good results on other types of cars.

Another object of the present invention resides in providing an improved commutator, the parts whereof will be inclosed in a Vcasing surrounding the engine cam shaft vor other engine driven shaft, and 'supported either therefrom or from the car chassis; said casing being provided with a removable front cover'plate to give ready access to the interior of the casing from the front thereof,v as found desirable in making adjustments and in substituting and renewing parts.

With these and other objects in view the invention consists in the novel details of costruction and combinations of parts more fully hereinafter disclosed and particularly pointed out in the claims.

In the accompanying drawings forming a -part of this application, and in which Similar reference symbols indicate correspond-- Specification of Letters Patent. Y

Application filed 1l' ovember 23, 1915. Serial N o. 63,108..

UNIVERSAL coarmn'rn'ron COMPANY, me., A conronnrroiv or ALA# l connur'naon.

Patented Oct. 10, 1916.

ing parts'in the several views: Figure plate partly broken away land showing the -interior of the casing of an improv'd com;

mutatorconstructed in accordance with the 1 is a-front elevatlonal view, With the frontbbverpresent invention. Fig. 2 is a central sectional View taken along the line 2-2 in Fig. 1; and Fig. 3 is a sectional view taken on the line 3-3 in F ig. 2.

Referring more particularly to the drawings, 1 designates a cam shaft, or other shaft, arranged to be driven from the internal combustion engine, and over which isv mounted a casing 2 for inclosing the various parts of the improved commutator; and which casing is preferably supported-from the chassis of the automobile in a manner not shown, as the same formano part of the present invention, it beingunderstood that such casing may be supported in any manner found desirable or necessary.

.On the cam or other shaft 1 is Xed an eccentric 3 formed withA a bearing 4 fitted on said cam shaft 1, and engaging a shoulder 20 on the shaft whereby the same is held to position. The eccentric 3 is also formed with a Iflange 21 embracing one side of a gear wheel 5 through a concentric opening in Whlch said eccentric 3 is rotatably fitted. A plate 22 conforming substantially to the shape of the eccentric liange 21 is securedto the eccentric 3`by screws, or other means, 23,. and embraces the opposite side of the gear wheel 5 for removably connecting said eccentric in place and to prevent possible disengagement therefrom during the operation of the dev ice.A This plate 22 is provided With a bearing 24, similar to the bearing 4, and extending oppositely therefrom, the samebeing perforated in registry with an opening inthe cam shaft 1' to receive a pin 25, whereby the plate 22 and eccentric 3 are connected to rotate with the cam shaft 1.

Over the end of the cam shaft 1 is fitted a washer 26 formed with a vflange 27 embracing the bearing 24, as advantageously shown in Fig. 2, and for positively preventing the pin 25 from accidental removal from enfr is threaded@ 1. The end ofthe cam receive a nut 28, which is screwed up against the washer 26 and binds the several parts av ring 7 of insulating material, wherein' v easing for adjustment 0f the parts, or for the removal and replacement of the same.

On the cover 31 is acentral forwardly projecting boss 32, hollow within to receive the end of the cam shaft 1 andparts thereof, Y

and formed With straight oute'i` faces which may be hexagonal, as shown, to provide av nut for engagement by the fngersor a wrench or other tool, whereby the cover ma be readily removed and replaced.v l

The teeth on the gear wheel 5 engage complemental teeth. on an internal gear 6 mounted Within the casing 2, and over which the gear wheel 5 is adapted to roll as the cam shaft 1 is rotated, Adjacent the internal gear 6, inthe casing 2, is also located are embedded a plurality of contact yplates 8 corresponding in number to the number of lcylinders of the engine.4 The contact plates 8 are here shown to be four in number, andere supported flush with the inner surface of the insulating ring 7 by the bind ing post screws 9. On the screws 9 are threaded the usual nuts 10 and 11, between which the leads tothe sparking devices 'are camped.

A drum 12 is secured in any suitable manner to the gear wheel 5, and is provided with a slotted rim for slidably receiving contact blocks 13, supported on the outer free ends of springs 15, secured by rivets or other suitable lmeans 16 to the interior ofthe rim ofA said drum.. The contact blocks are thus held normally projected, as will clearly appear from an inspection of Fig. 3, and the same are supported to yield when brought into engagement with the corresponding contact plates 8.

The circuit may be completed fromthe contact blocks 13 through they metallic 0r other circuit connections may be employed to complete the circuit, as maybe found desirable or necessary in practice.

The casing 2, as disclosed in Fig. 1,.is provided with the usual arm 17 for connection byl the spark control lever for shifting said casing in a manner and for a purpose well understood.

The gear wheel 5 and internal rack 6 are arranged to be so proportioned relatively,l

that the gear wheel 5 will include a number of teeth extending over one-third of its periphery corresponding to the numberA of teeth embraced within a quarter of the internal rack 7. This arrangement will operate to bring the three contactblocks 13 shown, successively into engagement with the four contact plates 8; said blocks 13 be+ ing` yieldingly pressed against the plates by the, springs' 15, as shown in Fig. 3, and which willinsure a good contact even after the contact blocks have been worn away to. a great extent.

'It yis obvious that those skilled in the art may vary the details of construction and arrangements of parts without de arting from the spirit of my invention, an therefore I do not wish 'to be limited to such features except as may-be required by the claims.

1. In an' improved commutator of the I character described, the combination with the motor cam shaft, of acasin tted thereover, a series. of concentrica ly arranged on said cam shaft, a. gear wheel having a concentric opening snugly receiving said ecgear wheel end having slots in the periphery thereof, spring means mounted withinv vcentrica drumsecured to rotate with said and arranged to slidably -proJect through l the slctsin said drum for successively engaging'said series of contact plates as lthe drum revolves, substantially'as described.

2. An improved 'commutator including an engine-driven shaft, an eccentric on said engine-driven shaft, a gear wheel mounted over said eccentric, a casing, anY lnternal gear withm' sa1d cas1ng arran ed 1n mesh with said first-named 'gear 4w eel, an iiisulating ring mounted in thecasingfto one sidel of said internal geer,' contacts ein-'- bedded in said -insulati'ng'iing`a11d Vill-elec trical connection with 'the s arlring devices.

ofthe engine, adrum'secure 'to rotatewith said gear wheel, and contact'biocks 0n Said.

drum for successively.A engaging the. contact plates in said insulating rihgsuhstantally as described. 5

3. 'In an improved ,commutator df the character described the combination withthe engine cam sha ofacasn'g supported thereabout, an insulating r'ing 1n' lsaid cat ing, series of concentric Contact plates em` bedded Hush in said ring'and4 in electrical connection. with the motor simrlxing' dewlces,

an internal gear disposed adjacent said im' sulatmg ring, an eccentric mounted to Ich@ with said cam shaft, a gear Wheel tted over said eccentric and in mesh to. ro11` around Within said internal gear, a drum supported to rotate with said gear Wheel, a series of spring-pressed Contact blocks carried by said drum for successively engaging said Contact plates, i removable front cover plate threaded into said casing, and a hollow boss on said cover plate for fitting the end of the cam shaft, substantially as described. i

In testimony whereof, I affix my signe ture.

JGSEPH F. PARKER

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