US1030013A - Dynamo-electric machine. - Google Patents

Description

H. H. RALSTON.

DYNAMO ELECTRIC MACHINE.

APPLICATION FILED MAY 31, 1907.

1,030,01 3, Patented June 18,1912.

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I-IOVV'ARD I-I. B ALSTON, OF NORIVOOD, OHIO, ASSIGNOR TO ALLIS-GI-IALMERS GOIYIEANY,

A CORPORATION OF NEW JERSEY, OOBSEPANY, A CORPORATION OF OHIO.

AND THE BULLOCK ELECTRIC MANUFACTURING DYNAMO-ELECTRIC MACHINE.

Specification of Letters Patent.

Application filed May 31, 1907.

Patented June 18, 1812. Serial No. 376,479.

To all whom it may concern:

Be it known that I, Ilowann H. RALSTON, citizen of the United States, residing at Yorwood, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Dynamo-Electric Machines, of which the following is a full, clear, and exact specification.

My invention relates to means for fasten ing the commutator necks to the commutator bars of dynamo-electric machines.

In the construction of commutators for dynamo-electric machines, the commutator necks or leads have generally been fastened to their respective commutator bars by soldering, riveting, or both before the commutator is assembled. This method of procedure, however, is sometimes not feasible in large machines, for it is sometimes necessary to ship a commutator with the commutator necks or leads unattached. In such cases it is necessary that some means be provided for readily attaching the commutator necks to the commutator segments after the commutator is assembled.

It is the object of my present invention to provide such means.

My invention therefore comprises certain novel features which will be apparent from the description and drawings and will be particularly pointed out in the claims.

Figure 1 shows a commutator segment with a fragment of a commutator neck attached thereto; Fig. 2 is an end view of the arrangement shown in Fig. 1; Figs. 3 and I show two intermediate posit-ions through which the commutator neck passes as it is being attached to the commutator segment; Fig. 5 is a partial end view of the assembled commutator; and Fig. 6 is an isometric View of the locking key.

The armature end of each of the commutator segments 10 is slotted at 11, and two pins 12 extending across said slot are put in place. The commutator necks or leads 18 are fornnd with notches let, notch 15, and slot 16 as shown.

After the commutator is assembled, the commutator bars or segments being supported in any desired or usual manner, the commutator necks may be attached at any time. Each of said necks is inserted from above into the slot 11 of one of the commutator segments, as shown in Fig. 3, and

is forced first down ard and then toward the armature end of the commutator into the position shown in F 4, with the notches l4 fitting over the pins 12. A key 17 of approximately tie same thickness as theslot 11 is then forced into said slot between the neck 13 and the solid part of the commutator section 10, as shown in Fig. This key holds the neck 13 firmly against the pins 12. ll hcn the key 17 reaches the position shown in Fig. 4, a leaf spring 18 fixed in a saw kerf therein springs out into engagement with the notch 15. as shown in Fig. 1, to prevent the key from being moved outwardly from any cause whatsoever. To improve the electrical connection between the commutator segment 10 and the neck 13, solder may be run into the slot 16 in said neck, spreading thence to the engaging surfaces of the neck and the segment.

Many modifications may be made in the precise arrangement here shown and de scribed, and all such which come within the spirit and scope of my invention I aim to cover in the following claims.

hat I claim as new is 1. In combination, a commutator bar slotted at one end, a commutator neck fitting into said slot, and means also fitting into said slot and arranged to engage said neck and a wall of said slot to lock the neck in place in the slot, said means in cluding a resilient portion adapted to prevent the withdrawal of said means when once inplace.

2. In combination, a slotted commutator bar, a commutator neck adapted to be inserted in the slot in said bar, and a resilient member for locking said neck in place and being adapted to fit in said slot between a wall of said slot and said neck.

3. In combination, a slotted commutator bar, a commutator neck adapted to be inserted in the slot in said bar, a member for locking said neck in place, said member including a latch for preventing said locking member from being withdrawn after it is once in looking position.

t. In combination, a commutator bar slotted at one end, a pin extending transversely across said slot, a commutator neck provided with a notch arranged to fitover said pin, .and a locking member for holding said neck against said pin.

- against said pins,

5. In combination, a commutator bar slotted at one end, pins extending transversely across said slot, a commutator neck providedwith notches arranged to fit over said pins, a key for holding said neck and means for preventing the withdrawal of said key when once in place.

6. In a commutator, a plurality of commutator bars, a plurality of commutator necks arranged to be connected to said bars after the latter are assembled, and means for locking said necks in place relatively to said bars and preventing the withdrawal of such means when once in place.

7. In a commutator, a plurality of slotted commutator bars, a commutator neck for each bar arranged to be inserted in the slot therein after the commutator is assembled, and non-withdrawable locking means for holding said necks in place relatively to said bars.

8. In a commutator, a plurality of slotted commutator bars, a plurality of commutator necks adapted to be inserted in the slots of the respective commutator bars after the latter are assembled, and a plurality of snap keys fitting into said slots for locking said necks in place relatively to their respective bars.

9. In a commutator, a plurality of slotted commutator bars, a plurality of commutator necks arranged to beinserted in the slots of the respective commutator bars after the latter are assembled, a key for locking each of said necks in place relatively to its bar, and means for preventing the withdrawal of said key when once it is in place.

10. In combination, a commutator bar having a radial, longitudinal slot, a commutator neck adapted to be inserted into said slot, and a member which, when inserted radially into said slot after said neck has been inserted, locks said neck in place.

11. In a commutator, a plurality of com mutator bars, each having a radial, longitudinal slot, a plurality of commutator necks arranged to be inserted radially in the slots in their respective bars after the commutator has been assembled, and resilient means for locking said necks in place relatively to said bars.

In testimony whereof I afiix my signature in the presence of two witnesses.

HOIVARD I-I. HAL STON.

Witnesses GEO. B. ScHLnY, FRED J. Kinsey.

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

Washington, D. C.

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