US374778A - Albeet f - Google Patents

Description

(No Model.)

- A. F. UONGDON.

- ELECTRIC GENERATOR AND MOTOR. No. 374,778. Patented Dec. 13, 1887.

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' UNITED STATES PATENT OFFICE- ALBERT F. CONGDON, OF PHILADELPHIA,"PENNSYLVANIA, ASSIGNOR OF TWO-THIBDS TO ISAAC SOHLIOTER AND GEORGE E. VIOKERS, BOTHOF SAME PLACE.

ELECTRIC GENERATOR AND MOTOR.

SPECIFICATION forming part of Letters Patent No. 374,778, dated December 13, 1887.

Application filed March 26, 1887. Serial No. 232,544.

1c and electric motors, designed with the view,

mainly, of increasing the efficiency of the machine and of facilitating repairs to the armature in case of accident.

In the accompanying drawings, Figure 1 is' I vertical section of a dynamo-electric machine embodying myimprovements. Fig. 2 is a vertical section at right angles to that shown in Fig. 1; and Fig. 3 illustrates in perspective View the armature shaft and sleeve on which the armature is to be mounted.

E and E are the field-magnets, the cores 6 of which are bolted at their outer ends to the usual iron frame, F.

In electric generators or motors as heretofore constructed it has been usual to carefully finish the contact surfaces of the ends of the cores and the frame, so that when bolted together a good metallic contact will be obtained. In order to get a good metallic contact with- 0 out the necessity of finishing the parts, I form in the outer end of each core one or more grooves or recesses, and on the frame corresponding projectionsf, as shown more fully in Fig. 2. By this means I get an increased ex- 3 5 tent of contact-surface between the frame and the ends of the cores of the field-magnets,and

do not need to finish the projections or grooves.

The extension of parts of the frame (namely,

the projectionsf) to points within the convo- 0 lutions of some of the field-magnet coils is also an advantage I find. Between the poles of the field-magnets rotates the armature A, which is of the drum-wound style.

The bodyof the armature consists of a num- 4 5 ber of sheet-metal plates or disks, spaced, if

desired, as hereinafter described, and mounted on a shaft, S, which turns in suitable bearings,

D D, secured to the pole-piecesor frame of the v machine. Overthesedisksare wound the usual (No model.)

wires in any desired way. In order that the shaft of this armature may be removed readily, in case of breakage or other accident, and without disturbing the body of the armature or wires wound thereon, I construct the armature and mount it on the shaft in the following manner: The sheet-metal disks a, forming the body of the armature, are mounted on a sleeve, B, Fig. 3, and are spaced apart by blocks a of paper or other suitable insulating material, the end disks of the series being preferably castings with flanges e, as shown in Fig. 1. On one end of the sleeve B is a nut or collar, 1), and on the other end is to be screwed a nut, b, so as to clamp the disks forming the body of the armature on the sleeve. The above with its nuts thus is the sole means of holding the disks together, and the use of additional bolts is dispensed with. Vithin the annular flange of each end piece is fitted the tube G, (G,) and on the longer of these tubes is mounted any suitable form of com mutator 0. Over the armature thus constructed can then be Wound the wires,with their terminals connected to the segments of the 60111- mutator, the winding holding the tubes G G in place. Through the sleeve Bean be inserted the shaft S, and in order that the armature above described can rotate with the shaft a' key, 8, on the latter fits into a longitudinal slot, 8', Fig. 3, in the sleeve B, and preferably into corresponding notches in the metal disks of the armature. Theslot s in the sleeve B does not extend quite to the end on which the retaining-nut b is screwed. In order to retain the shaft in place a distance piece or sleeve, T, is slipped over one end through the tube G, and the shaft is drawn up until the end of the key 3 reaches the end of the groove 3 in the sleeve B. The sleeve T is then secured to the shaft by a suitable set-screw, t, and after the shaft of the armature has been adjusted to its bearings the belt-pulley is seeured'to the shaft. In case of breakage or injury to the shaft, all that is necessary to take the shaft out without disturbing the body or winding of the arma- 5 ture is to remove the belt-pulley, free the distance-piece T from the shaft, remove the bearing D, and pull the shaft out, as will be readily understood on reference to the drawings.

Openings p are formed in the spaced disks to for the free circulation of air through them and the coils, this circulation being facilitated by the open tubes G G at the opposite ends.

I claim as my invention- 1. The electric generator or motor having recesses in the ends of its field-magnet cores, in combination with projections on the frame adapted to said recesses and extending to points within the field-magnet coils, substantially as set forth.

2. The combination of the disks and winding of a drum-wound armature and a sleeve on which the said disks and drum-winding are mounted, and which is the sole means of clamping the disks, with ashaft keyed to said sleeve and removable therefrom without disturbing the winding, all substantially as set forth.

3. The combination of the disks and winding of an armature, tubes at the ends over which the winding passes, and a commutator mounted on one of the tubes, with a removable shaft passing through said tubes, all substantially as specified.

4:. The combination of the disks and winding of an armature, and a sleeve 011 which they are mounted, with tubes at the opposite ends, over which the winding passes, a keyed shaft passing through the said sleeve, and a diso tance-piece, T, all substantially as specified. In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ALBERT F. CONGDON. Witnesses:

WILLIAM D. CONN-ER, HARRY SMITH.

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