USRE9836E - sawyer - Google Patents

Description

8 8heets8heat l.

W. SAWYER,

Assignor to Tim EASTERN ELECTRIC MANUFACTURING Co.

DYNAMO ELEGTRIG MACHINE.

Reissued Aug. 9, 1881.

3 8heets8heet 2.

DYNAMO ELECTRIC MACHINE.

Reissued Aug. 9,1881.

P, n w .i W u J @M S a m H "B .1. 1 W H k m 1 3 Sheets-Sheet 3. W. SAWYER,

Assignor to THE EASTERN Emc'rmc Mnwmc'rumna co.

DYNAMO ELECTRIC MACHINE.

Reissued Aug. 9, 1881.

Fns a m/ E min r Sway w a EU 1 0 all it maly cbhcern:

UNITED STATES WILLIAM SAWYER, OF NEW YORK,

[PATENT a -m.

.ASSIGNOR To THE- EASTERN ELECTRIC MANUFACTURING COMPANY, OF MIDDLETOWN,JCONN.

oYNA'Mo-ELECTmc MACHINE.-

' srncrrrcs'rmn forming part of Reissued Letters Patent No. 9,836 da ted As t 9, 1981.

l Original No. 221,245, dated-May 1s, 1 880. Application ft reissuc'filed Aim! 26, 188i.

,Be it known that I, WILLIAM SAWYEB, of New York, in the county of New York and State of New York, have invented certain new and useful Improvementsin Dynamo-Electric Machines; and I'do hereby declare the following is a full, clear, and exact description of the invention, that will enable others skilled in the art towhich it appertains to make and u'se-the same, reference being had to the accompanying drawings, and to the letters ofreference marked thereon,which form a part-of this specification. My invention relates to dynamo-electric niachines; and it consists, first, in a hollow arma-' .ture-shaft, the openings through which terminate at each end'of the armature and open into a water-chamber -at the armature ends; sec

ond; in an armature-shaft hollowed throu h its center'to the opposite ends of the arina ore, and provided with end openings for the ingress and egress of the water, and middle openings for the passage of the water-into and. out of water-chambers at each end of Y the armature;

third, in a dynamo-electric machine in which through openings around thearmature; fourth, in the water-chambers ,at each end of the 'armature, formed by a water-tight cap attached to the ends of thearmature, and provided with that it is deemed superfluous to enter into aminute description of the same. "The great difficulty with all such generators of. electricity is their-liability to heat, and thereby to greatly increase their resistance, if not to burn the insulating materialin which the wires are incased.

The principal object of my. invention: is to prevent this electrical heating.

boltedto the back piece, 1K, and P isthe wirewound armature. i

The drawings are intended to represent what "Referring more particularly to the drawings, I

P Pare the two limbs of an electro-magnet is known as the new Siemens machine, in a so far as the magnet and its armature are concerned, D D being the rotating insulated commntators,and Q Q the brushes on studsS, heldto their bearings by springs R, from which the current is taken, T being the magnet-coils' I have not deemed it necessaryto show the method of electrically, connecting up the machine, for'the reason that I do notconfine my one, and does not consist innany particular part 'ofanydynamo-machineelectricallyconsidered. The shaft 0, workinginthe bearingsH in the ofisets from the magnet back piece, K, is

caused to rotate by a belt (not shown) passing over pulley U, as will be comprehended with "out further description. the water for cooling the armature flows into chambers at. the, armature ends and thence In, other. dynamo-machines cooling of the partshas'been attempted mainly'either by running water through the shaft'or by rotating thearmature in water. The latter method is.

for several readily appreciated reasons objectionahle, and in the former the non-conducting material incasing the wires being aneqnally good non conductor of heat, the eflici'ency of the device is questionable. Radiation by means "F of great exposure of surface has also been attempted; but this, too,has its objections, principally on account of the increased power required to drive the machine.

Through the armatureB, Fig. 2, I ashaft, C, hol1owed, as shown; so that the'part passing directly through the armature. from end to end-is solid. At the armature ends the shaft has two ports, J J, entering into waterchambers E, formed by attaching a water-tight cap, E, to the ends of them-mature,- and having its central part forming a collar to .pass

around the shaft 0. This cap E is'm'ade water-tight by anyof the well-known devices for that purpose. The armature is perforated. throughout its length by holes F, enteringintothe water-chamber E, just described. )An j opening, G, admits water, which is carried t'o the shaft 0 throug the annular-space M, and flowsalong the hollowed space N to the. ports J, where it flows into the chamberE, and, traversing the perforations F, is conveyed around the armature and discharged into the opposite chamber, and leaves said chamber by way .of the ports J, andagain reachesth'e' hollow shaft upon the opposite side of the armature,- and isconducted ofi' through the annularspace M and exit tube-Gf. To close the endsof the sha'ftjl employ screw=caps L. To make the water-joints of the journal bearings tight I employ the screw-capsH', packed with cotton waste or, other like material, I. 'The'resu'ltof the constant passage of water through the per forations F is to cool the armature, (and I remark that I may cool the magnet-P in the same manner,) and thereby to prevent undue heating; but as, owing to the nonconducting character of the insulating covering of the wire with which the-armature is wound, the outer layers (shown in Fig. 4) would not becoo'lcd bythe waterpassing through the armature, I

have resorted tothe device shown in Figs. 3;

and 4;,thesame being U shaped pieces of copper or other metal,0,- screwed or pinned to,or

' in any other mannerheld to the armature B,

inth'e spaces of which'are woundthe wiresW.

Being a good-conductor, these U -shaped pieces rapidly convey the heat generated in all the layers of the wire tothe armature, whence it is carried off by the flowing water. I do not,

1' :"however, in'this application claim the heatconducting pieces 0, as that feature of the in-' vention is to be made the subject-of a separate patent.-

Having thus fully described myinvention, what I claim as such, and desire to secure by Letters Patent, is-

arm'ature-shafhthe openings through which ends, substantially as described.

1. In a dynamo-electric 1'nachiue, a hollowed terminate at each end of thearmature'and open into a water-chamber at the armature :55 forth.

.' water-tight chambers at each end of a perforated armature,as described, and a hollow armature-shaft having inlet and outlet ports, so that the water for cooling the armature may 56- traverse the armature-shaft to a water-cham- T-ber at "one end of the armature, thence through the-armature-perforationsto'a water-chamber and exit-tube at the opposite end of "said arma as and for the purpose set 'ture, substantially 2. Adynamo-elec'tric machine-provided with,

3. A dynamo-machine'l1aving awater-eham-e bet at each end of the armature, formed by a water-tight cap attached to the armature ends, and having a collar surrounding the armatureshaft, substantially asdesc'ri-bed. I

4. A dynamo-electric machine having waterchambers at each end of the armature, and a hollow armature-shaft provided with openings near its outer ends for the ingress-and egress of the water, and ports near its center for the passage of the water .to and from said waterchambers, substantiallylas' described, and for the purpose set forth.

" 5. Adynamo-electricmachineh'avingan armature provided with a circular series of longitudinal perforationspassing entirelythrough the armature near itsouter surface, whereby a running stream'of water may pass through said perforations and around the body of the armzatture, substantially as and for the purpose 6. Ina dynammele ct ric machine, .the combination of an armaturehaving perforations for the passage of a stream of water, with water-a tight caps E, substantially and for-the purpose set forth. T v 7 7. In a dynamo-electric machine, the combination of an armature, B, a hollow shaft provided with an opening at one end of said armature and another opening at the otherend of said armature, 'with twoor more openings, F, through said armature, substantially as shown and described.

8. A dynamo electric machine provided with capsat each end of the armature, forming water-chambers, said water-chambers expanding to-a greater size at the pointsor ends of the v armature than thesize of the ingress and egress openings, substantially as shown and described.

9. A dynamo-electric machine having a hollow armature-shaft with inlet and outletports, and a'- perforated armature, the perforationsopening into water-chambers of greater size than said perforations, substantially as shown and described. i

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

WM. SAWYER.

' Witnesses F. W. Hinton, WORTH Oscoo'n.

IOO

Images