US1252514A - Armature for ignition-dynamos. - Google Patents

Description

H. 3. VAN DEVENTER.

ARMATURE FOR IGNIHON DYNAMOS.

APPLICATION FILED Dc.2, 1914.

1,252,514. Patented Jag. 8,1918.

UNITED sTATEs PATENT oEEroE.

HARRY RANDOLPH VAN DEVENTER, OF SUMTER, SOUTH CAROLINA, ASSIGNOR, BY I MESNE ASSIGNMENTS, TO SPLITDORF ELECTRICAL COMPANY, OF NEWARK, NEW

JERSEY, A CORPORATION OF NEW J EBSEY.

ARMATURE FOR IGNITION-DYNAMICS.

Specification of Letters atent.

Patented Jan. s, 191s.

Application filed December 2, 1914. Serial No. 875,104.

To allwltom z't may concern:

.Be it known that I, 'HARRY RANDOLPH VAN DEVENTER, a citizen of the United States, residing at Sumter, in the county of Sumter and State of South Carolina, have invented certain new and useful Improvements in Armatures for Ignition-Dynamos, of ywhich the following is4 a speciiication, reference being had to the accompanying drawing.

My invention relates to dynamos for ignition purposes, and has for its object the provision on the armature of'a collector ring that is simple in construction and adapted to be stamped vand formed from sheet metal and securely held in place by stamped pieces of insulation.

A further object is t0` provide a collector ring assembly in which a minimum number of-parts are used and the necessity for hand ttmg is to a large extent eliminated.

Figure l is a view partly in section of a magneto generator, embodying my invention. Fig. 2 is a view partly in section of an armature head with the collector ring in place. Fig. 3 is a modication of Fig. 2. Like figures of reference denote the same parts wherever they are shown.

Heretofore, it has been customary to secure a piece of insulation to the armature head, this insulation carrying a plain ring, this ring being clamped in place by an outer insulating flange or being secured to the insulation in some suitable manner. In this construction, a suitable conductor is connected to the ring and brought through the end plate, from which it is insulated by a suitable bushing or thimble. Such a construction is open to several objections, such as the necessity of securing the insulation carrying the ring to the end plate, the necessity of a bushing through the end plate and the necessity of securing the ring to the insulation and the amount of hand fitting necessary.v

All of these objections are eliminated by my construction, the preferred form of which is as follows 1 denotes a stub shaft having a shoulder indicated at 2, against which is placed one or more metallic washers 3, which form a support for the washer of insulating material 4, which fits tightly on the shaft and which is of the same diameter as the inter-v nal diameter of the collector ring 5 which is placed over and against it, as shown. The hole through the collector ring for the shaft is of greater diameter than the shaft so that the collector ring is not in contact therewith, but is supported away from same by means of the insulation 4.

Against the back of the cup-shaped collector ring is placed the insulating washer 6 and against this the armature end plate 7.v

The projecting end of the shaft is now upset or otherwise securely riveted over 7 as indicated at 8, whereby all of the foregoing parts are firmly secured together to form the structure shown in Fig. 2.

While I have described the shaft 1 as having a shoulder, it is obvious that the washers 2, 3 and 6 together with the head 7 may be simply pressed on the shaft,r but the preferred construction is the employment of the shoulder 2 with the parts held together by the upset end 8. a

Fig. 3 shows `the modified form of the arrangement shown in Fig. 2 in which the flange on the collector ring is omitted same being simply a fiat perforated disk as shown in which case the contact brush 12 may be arranged to engage the disk horizontally as shown in Fig. 3 instead of vertically as shown in Fig. 1. Such an arrangement I deem within the scope of my invention.

To eliminate the necessity heretofore existing of bushing the end plate 7 and leading a wire therethrough to connect with the collector 5, I form an aperture in 7 adapted to accommodate a rearwardly extending tongue 9, which is preferably formed integral with the collector 5. The aperture in 7 is larger than 9 so the latter may pass without danger of contact, as 9 is rigid enough to be selfsupporting.

By reference to Fig. 1 showing `the armature with collector ring in place, it will be evident that one end of the winding 10 is connected to the frame of the armature at 11 and the other end of the winding, to tongue 9 and that the circuit extends from the collector ring 5 to the brush 12 to the terminal 13 and from there, 'to any suitable spark producing device, the circuit returning from said sparking device being completed through the frame 14 of the magneto.

It will be observed that there are no pins, screws, small insulating bushings or other members used in connection with this collector ring assembly; Furthermore that the Various parts are stamped and therefore of correct size in relation to eac-h other, so that they are easily and accurately assembled with a minimum of hand fitting.

And it Will bevunderstood that the magneto herein shown is merely for the sake of `illustratio'n'and that my improved collector ring assembly may be employed in any other form of magneto wherein a suitable terminal brush is supported in contact relation with said ring.

Having thus described my invention, I claim l. An armature comprising a core and Winding, an end plate secured to said Core, a shaft secured tol said end plate, and an insulated collector clamped to said shaft by said end plate.

2.' An armature comprising ay core and Winding, an end plate secured to said core, a shaft secured to said' end plate and an insulated collectorclamped to said shaft by said end plate and having an inwardly projecting integral tongue.

3. An armature comprising a 'core and Winding, and an end plate secured to said core, a shaft secured to said end plate, a flanged collector surrounding said shaft, an insulated disk between said collector said end plate, a second insulating` disk With- 'in the flanged portion of said collector serving to position the'same on said shaft, and means for clamping said disks and collector to said end plate, said means including a shoulder on said shaft. y

4. An armature comprising a core and Winding, an end plate secured to said core, a shaft secured to `said end plate, a collector rino surrounding said Shaft, insulating dis is on each side of said ring, and means for clamping said shaft, collector ring, disks, and end plate together, said means including a shoulder on said shaft.

5. An armature shaft having a bearing portion and a shouldered portion of less diameter than the bearing portion, a collector comprising a centrally apertured cup-shaped metallic member, insulating members on each side of said member, an end plate having a central aperture adapted to receive the shouldered portion of said shaft, and means whereby all of the 'foregoing elements are clamped together, substantially as described.

In testimony whereof I hereunto aliX my' signature in the presence of tWo Witnesses.

HARRY RANDOLPH VAN DEVENTER.

Witnesses:

EDNA B. IsLER, E. H. RHAME.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

' Washington, I). C.

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