US 917188 A
Description (OCR text may contain errors)
L. A. TIRRILL.
DYNAMO ELECTRIC MACHINE.
APPLICATION FILED NOV. 19, 1904.
Patented Apr. 6, 1909.
2 SHEETS-SHEET 1.
Leona By NORRIS PETERS. INC v LITHO Wasuwctuw D C L. A. TIRRILL.
DYNAMO ELECTRIC MACHINE.
APPLICATION FILED NOV.19, 1904.
Patented Apr. 6, 1909.
2 SHEETS-SHEET 2.
WWNESSE INVENTORI UNITED STATES PATENT OFFICE.
LEONARD A. TIRRILL, -OF LYNN, MASSACHUSETTS, ASSIGNOR TO GENERAL ELECTRIC COMPANY, CORPORATION OF NEW YORK. r
- DYNAMO-ELECTRIC MACHINE.
Specification of Letters Patent.
Patented April 6, 1 909.
Application filed November 19, 1904. Serial No. 233,466.
To all whom it may concern." 7 Be it known that I, LEONARD A. TIRRILL, a citizen of the United States, residing at Lynn, county of Essex, State of Massachw 5 setts, have invented certain new and useful Improvements in Dynamo-Electric Machines,
of which the following is a specification.
At'the present time there is a demand for electric automobile motorsj which, while of the same general style and of the same rating, are supported from the carriages upon which they are mounted indifierent manners.
Heret'ofore each different method of support employed has ordinarily necessitated a special type of form of motor frame.
One of "the objects of my present invention is the construction and arrangement of a -motor in which the largest possible number of standard parts can be employed, while at the same time the peculiarities of frame con- In carrying out my invention I secure auxiliary heads to the'ends of the annular field ring. The auxiliary heads employed are provided with arms or lugs, or otherwise shaped to adapt them to be secured to the supporting means: The auxiliary heads have secured to them heads or end members of'the inotorf are mounted.
With this construction the only special parts ordinarily needed in order to supply a motor adapted to be supported in any particular manner are the auxiliary headiplates. All the other parts of the motor can be stand- I ard parts:
' My invention also comprises certain novel features of construction and arrangement.
' The 'various features of novelty which characterize my invention are pointed out with particularity in the claims annexed. to andforming a part of this specification. a better understandin .of' my invention, however, reference may e had to the accomanying drawings and description in which .I iiave illustrate several motors equipped with my invention.
Of the drawings, Figure 1 is an elevation with parts broken away and in'section showing one form of electric automoblle motor equip ed with .my invention; Fig 2 1s 2.
art a l end view of the motor shown n Fig 1 Fig. 3 is an endelevation and Fig. 4 a side struction necessary for the different methods of motor support employed can be obtained.
in which the bearings for the armature shaft- For mounted bearing sleeves 19.
elevation of another form of automobile motor; Fig. 5 is an end elevation and Fig. 6 a side elevation of a third form of automobile motor; and Fig. 7 is an end elevation and Fig. 8 a side elevation showing still another form of motor equi ped with my invention.
Referring particu arly to Figs. 1 and 2 of the drawings, 1 represents the annular field ring of a four-pole automobile motor. To the interior of the ring 1 are secured four pole pieces 2 surrounded by suitable windings 3. i
The armature 4 of the motor and commutator'5 are secured to a sleeve'or quill 6 keyed to the armature shaft 7. The armature shaft 7 which is adapted to carry at its end 8 any suitable power-transmitting device, such as a gear, can be reversibly inserted in the uill 6 so that the power-transmitting end of t e shaft may be located at either side of the armature.
Against the ends of the field ring 1, which are machined for the purpose, are secured auxiliary or intermediate head members9 and 10. The member 9, which is shaped to inclose the commutator 5 and brush-holders of the motor, :is', provided with an interior radially-extending flange 11. Bolts 12 ing through this flange and ta 'ped into the end of the field ring 1 secure t he member 9 to the field ring 1. Bolts 13 passing through the head member-10 and tapped into the end of the field: ring 1 secure the member 10 in place.
Rabbeted circular openings are formed centrally in the heads or end members 9 and 10. Circular end members 15 substantially identical in construction fit in these openings being secured therein by clampin bolts 16 and plates 17. As is ,clearly shown the plates 17 bear against the outer surfaces of the end members 15 which are thus angularly adjustable with reference to the intermediate or auxiliary head members to which they are secured. The end members 15 are provided with suitable boxes .18 in which are The armature shaft 7 of. the motor is journaled in the bearsleeves 19.
n the construction shown in Figs. 1 and 2 each of the head members 9 and 10 is shown as provided with an integral lateral projection or arm 25. Bearings 26 carried at the outer ends of the arms 25,;which extend at one side of the motor proper are adapted to encircle a suitable support such as the axle of the-aw tomobile upon which the motor is mounted. In this construction perforated lugs 27 carried bythe field ring 1 form means through which the motor is supported from the other side. As ordinarily mounted, the lugs 27 and arms 25 are located in the same horizontal plane. It will be readily understood that when this is the case the heads or end members are given a quarter turn from the position shown so that the waste plugs 28 are directly below the armature shaft 7 In automobile construction a motor sus pension in which the motor is suspended by means oflugs, such as the lugs 27, and by projections such as arms 25 journaled on one of the axles of the automobile is .very coinmonly employed. 4
With motors such as shown in Figs. 1 and 2, the provision of motors provided with arms 25 of different lengths, shapes or dimensions, to meet the demand of different makers and for different styles, is very simple, necessitating only the making of a pair of intermediatehead members 9 and 10 for each style. All the other parts of the motor may be selected from standard parts in stock.
My method of motor construction can also be employed very advantageously in connection with other modes of suspension. For instance, in the form shown in Figs. 3 and 4, the upper side of each auxiliary or intermediate head member is provided'with a pair of apertured lugs 31 and 32, and the motor sus ension means engages these lugs.
11 the form shown in Figs. 5 and 6, the motor-supporting mechanism is secured to the ends of a pair ofdiametricallywpposed lugs 33 and 34 formed on each of the membars 9 and 10.
In the form shown in Figs. 7 and 8, the motor is cradled in straps or supporting members 35 and 36 which are bolted to the intermediate head members as shown in 37 and 38.
With all the various forms of motors shown and illustrated the only special parts reuired are the intermediatehead members, tough preferably with the form shown in Figs. 3 to 7 the lugs 27 shown in Figs. 1 and 2 are left off. This, however, is a very simple matter.
As is Well known to all those skilled inthe' art the annular field ring 1 may be cast with or without lugs from the same pattern.
As before stated, the bearing members 15 are substantially identical in construction.
Preferably, however, the bearing memberadjacent the ower-transmitting end of the armature sha t is provided with a somewhat larger bearin surface proper than the other bearing mem er. When it is desired to have the power-transmitting end of the armature shaft at the opposite side of the armature ing with its power 'transi from that shown in Fig. 1 the armature .shaft is reversed with respect to the quill 6 and the bearing members are interchanged.
It will be obvious to all those skilled in the art that my invention maybe employed with many different means of suspension from those shown, and that many variations may be made in the formainl application of my invention without departing from its spirit; and I do not intend the claims herein made to be limited to the construction shown more than is made necessary bythe state of the art.
hat I claim as new and desire to secure by Letters Patent of the United States, is,
1. In combination, an electric motor, comprising a rigid, self-sustaining field ring, intermediate head members secured to the ends of the field ring, heads secured to the intermediate members, an internal ro tating member formed with an axial opening to receive a shaft, a shaft adapted to be reversibly secured in said opening with. its power transmitting end at either side of the rotating member, bearings for said armature shaft carried by the heads, and supporting devices engaging the intermediate members, whereby the motor may be made of standard parts with the exception ofthe intermediate members.
2. In -an-electric motor, a rigid self-sustaining field ring, an intermediate head member secured to one end of said field ring, a head secured to the intermediate member, an internal rotating member formed with an axial o ening to receive a shaft, a shaft adapt-e to be reversibly secured in said openitting end at either side of the rotating member, a bearing for said armature shaft carried by said head, and a supporting device for the motor engaging the intermediate member, whereby the motor may be made of standard parts with the exception of the intermediate member.
3. In combination, an electric motor, comprising an external stationary member an internal rotating member formed with an axial opening to receive a shaft, a shaft adapted to bereversibly secured in said opening withits power-transmitting end ateither side of the rotating member, intermediate members secured to the ends of the stationar member, and bearing members, in which the shaft is journaled adapted to' be interchangeably secured in said intermediate .men bers.
quill or sleeve, an armature and a commutator carried thereby, a shaft adapted to be reversibly inserted in said quill with its power transmitting end at either side of the armature, and bearings for said shaft adapted; to be interchangeably secured in said heads or members.
5. In combination, an electric motor, comprising an external stationary member; an internal rotating member formed with an axial oFening) to receive a shaft, a shaft adapte to e reversibly secured in said opening with its power-transmitting end at either side of the rotating member, intermediatemembers secured to the ends of the stationary member, bearing members in which the shaft is journaled adapted to be inter- 10 changeably secured in said intermediate members, and supporting devices engaging the intermediate members.
In Witness whereof, I have hereunto set my hand this sixteenth day of November, 1904.
LEONARD A. TIRRILL Witnesses:
JOHN A. McMANUs, Jr., DUGALD MoK. McKILLoP.