US1270967A - Armature for dynamo-electric machines. - Google Patents

Description

F. N. MIZER.

ARMATURE FOR DYN AM0 ELECTRIC MACHINES.

APPLICATION FILED NOV. 8,1916.

Patented July 2, 1918,

u WASHINGYDN. 0 cv UNITED STATES PATENT FRET) N. MIZER, 0F ELYRIA, OHIO, ASSIGNOR TO THE GARFORD MANUFACTURING COMPANY, OF ELYRIA, OHIO, A CORPORATION OF OHIO.

ABMATURE FOE DYNAIEO-ELECTRIG MACHINES.

Application filed November 8, 1916.

To all whom it may concern:

Be it known that I, FRED N. MIZER, a citi- Zen of the United States, residing at Elyria, in the county of Lorain and State of Ohio, have invented certain new and useful Improvements in Armatures for Dynamo- Electric Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will onable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in armatures for dynamo-electric machines,

and more particularly to armatures whichare to be rotated at a high angular velocity, such for example, as are employed in certain types of electric automobile horns and the like. In the particular use which I have mentioned and also many other uses, the armatures of dynamo-electric machines are subjected to constant jarring and shaking, which tends to loosen or dislodge parts of the built up armature. Sometimes, as in automobile horns, this jarring and shaking takes place at the same time that the armature is rotated at high velocities, exaggerating the tendency to loosen and dislodge the parts. For example, in the use which I have mentioned-that of electric automobile horns, these forces are all acting at the same time to disarrange the construction of the armature.

One of the objects of my invention is to provide an armature which will serve where high velocity is employed, where the armature is jarred or shaken in use, or where all these agencies are at work, to perform the armature functions without the armature parts being disarranged or tornapart. This and other objects of my invention, as well as the invention itself will be better understood from a description of an embodiment of my invention.

Figure 1 is an armature of a dynamoelectric machine showing an embodiment of my invention in elevation, with a portion of the binding cord cut away.

Fig. 2 is a longitudinal section through a part of one end of the armature of the embodiment shown in Fig. 1.

Fig. 3 is an end view of the portion of the Specification of Letters Patent.

Patented July 2, 1918.

Serial No. 130,116.

embodiment of my invention shown in Fig. 2.

Fig. 1 is a detail view of an element em ployed in the embodiments shown in Figs.

1, 2 and 3.

Referring now to the drawing and to the embodiment of my invention shown therein, at 5 is shown the armature shaft which here consists of a shaft proper 6 and a sleeve 7 thereon. For convenience of manufacture the particular embodiment illustrated is made in the manner shown, though it will be obvious to those skilled in the art that the parts 6 and 7 may be one. At 8 is shown the armature and at 9 are shown armature windings which terminate at 10. The section 7 of the armature is provided with commutator recesses 11. In the embodiment shown the end walls 12 of these recesses are tumbled or drawn in, as shown at 13, so that the opening 14 thereof is restricted at the top and smaller than at the bottom 15. The recess is lined with insulating material 16, which in general follows the contour of the walls of the recess. The commutator segments are shown at 17 and fit within the recess, the insulating lining being interposed between the walls of the recess and the commutator segments.

At 20, 20 are shown circuit connectors provided with relatively short limbs 21 which extend under the commutator seg ment 17. The commutator segments are provided with recesses 23 for the reception of the limbs 21. The connectors 20, 20 are provided with relatively long limbs 22 which extend along the end of the commu tator slots between the ends of the commu tater segments and the insulating material and are folded over the armature shaft, as shown in Fig. 1, fitting tightly thereagainst. A. cushioning material, such as a plurality of cords 25 may be employed between the armature shaft and the limbs 22 of the connectors 20, 20. The end 10 of the armature winding is connected, as shown at 30, to the limb 22 of the connector 20 and these parts are bound tightly to the armature shaft by suitable means, such as by threads 31 wound around the armature shaft over the ends 10 of the armature windings and the limbs 22 of the connectors. This particular structure is better illustrated in Fig. 1. The cushioning material 25 will yield before the electrical partswhen they arethusbound down and prevent any injury thereto;

The connectors are preferably made rela' tively thin, as shown in the drawing, soasto make a snug fit" with the various parts and to cooperate with them without making an unsightly structure,

It will be seen that the parts will remain in position and th'e electric connectionsbe maintained, even though thearmature is rotated at a high veloclty of speed, and even though 1t 1s 1arred and shaken whenso ro tated. The elements employed are easily;

and cheaply constructed and assembled, and when so constructedand assembled-the re sultin structure is neat in appearance as well as eflicient and durable.

I have shown this particular embodiment of'my invention and the details employed therein for the purpose of I better describing. my invention and not that I w1sl-1-'to-be limited thereto, as it will be apparent to those skilled in the art'that numerous and extensive departures may be made from the form and details thereof, without departing from the spirit'of the invention.

I claim: 1. In an armature for dynamo-electric machines, the combination of an armature" shafthavinga plurality of recesses'therein, each of "which :is provided with a 'top open ing and end walls tumbled in to restrict the said top opening, linings of'insulatingzmwterlallfor sald recesses, Va commutator seg.'-

ment in eachrecess within said lining, each segment provided with arecess inaon'e end* and electric conductor connectors, one for each commutator segment, .each connector having 7' a short-limb extending underits associate commutator scgmentand'into' the recess under the end thereof, said connectors being provided with relatively long limbs extending each along one of theends ofthe commutator slotsand insulated from the walls of said slots by aninsulatingilining,. said long limbs being adapted to be folded over along the armature shaft, armature windings connected one to each o-f'said long limbs of said connectors andthreads-wound" around said armature shaft over the-long limbs of said connectors and the-ends of the armature windings attached thereto binding the long limbs of the connectors and the ends of the armature windings attached thereto to the armature shaft.

2. In an armature for dynamo-electric machines, the combination of an armature shaft provided with commutator segment slots, commutator segments in said slots, insulating material lining said slots, insulating-the segments: from the shaft, circuit connectors each provided with two limbs, one

linrb-of 'each of said connectors extending:

under one of said commutator segments, the other limb of each'of said connectors extending along the .endof its associate commutator segment and being folded" over along the armatureshaft, armature windingsyone connected to each ofsaidconnectors-'and-means to bind the endsiof 'saidar -mature windings and thefolded'over porarmature winding connected to the flexible; portlou of the commutator and means to bind the fiexibleportion of the connector and the end of the armature windingfto the armature shaft.

4:. In an: armature for dynamo-electric machines, the combination of an armature shaft, a commutator segment connected to and insulatedfrom said'shaft, a circuit'connector'connected at one end to said segment and'folded awayfrom saidsegment along.

said-shaft, an armature winding. connected to said connector and means to bmd the .end

of the connectorfolded-alongsaid shaft and the end of the armature windingito'the armature. sh aft.

In witness whereof, I- have hereunto signed myname this 6th day of November,

1916.-- 1 V V FRED N MIZER; Witnesses-z r J OHN PEHRssoN, L. PVVALIQ'U'ET.

Copies of this patentmay be obtained forfivercents each, by addressing the Commissioner of-Patents,

Washington, D. G. r

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