US942382A - Motor-controller. - Google Patents

Description

A. KIMBLE.

MOTGR CONTROLLER. APPLIUATION FILED snP'n'r, 1909.

' 942.382,- v Patented Dec. 7,,1909.

n e u v drawings, in which:

v UNITED STATES PATENT OFFICE.

AUSTIN KIMBLE, OF .CHICAGQ, ILLINOIS ASSIG-N'OB TO KIMBLE ELECTRIC COMPANY, OF CHICAGO, ILLINOIS, A COR?ORATION GE ILLINOLQ.

MOTOR-CONTROLLER.-

To all whom it may concern:

Be it known that I, A STIN K1MBLE,a citizen of the United States of America-and a resident of. Chicago, county of Cook, State of Illinois, have invented certain new and useful Improvements in Motor-Controllers, of which the following is a specification.

The main objects of this invention are to provide an improved controller for starting, stopping, reversing and regulating the speed of a single phase alternating current commutating motor; to provide an im rovedcontroller and support adapted to term a part of the motor frame structure; and to provide an improved construction in which all the functions of the controller, are performed by one moving structure without connecting links or reversing switches.

A specific construction embodying'this invention is illustrated in the accompanying Figure 1 is an interior end elevation of the end frame of a motor with the controller assembled thereon. Fig. 2 is a sectional View taken on the line AA of Fig. 1.

- In the construction shown, the supporting end framel is in the usual form of the end 'and reversing lever (3 which is directly secured to the ring There are also mounted on the vring 3 four symmetrically placed brushes, 7, 8, 1), and 10. The brushes are mounted on studs 11 which are integral with the bracket 12, which'is in turn, mounted on, but insulated from the ring The brackets are secured to the ring 3 by means of bolts 13 which'are also insulated from the ring 3. The brushes 7, 8, 9, and 10 are shown diagrammatically to engage a commutator which is represented by a dotted circle 14.

The brush 7 is electrically cross connected to the brush 8 by an insulated conductor 15.

In a similar manner,- an insulated conductor t6-connects the brush 10 with the brush 9.

i The brush 7 is supported by two bolts 13 which also secure a spring-actuated contact Specification of Letters Patent.

swin -actuated contact 17.

Patented Dec. 7, 1909.

Application filed September 7, 1909. Serial No. 518,346.

17 which extends outwardly from the center of the machine. In a similar manner, the brush 9 is directly connected to a similar Between the segments 18, 19, 20, and 21 and the end frame is placed insulating material which is made flush with thebearing surfaces of the segments. The metal segments 18 and 19 are electrically connected through the conductor 28 with a short binding post 22 which is mounted on, but insulated from, theend frame 1. In a similar manner, the segments 20 and 21 are electrically connected to a binding post 2 1- by means of an electrical conductor 25.

The binding post 26 is designed to be connected to the line and to one end of the usual stator windings, the opposite end of the stator windings being connected to the post 22, the other end of the line being connected to the post 2%. The four metal contact seg ments are mounted on the frame, concentrically with respect to the axis of the motor and l sated so as to be engaged by the spring- actuated contacts 17, 17.

The controller and mounting as shown form the end frame of astator. One of the line wires is brought into the post 20 which is connected in the usual way to one end of the stator Winding by a wire 27 which passes through the insulating bushing 28. The opposite end of the stator winding 29 is brought out of the frame 1 through the insulating bushing 30 and is connected to the post 22.

in operation when the speed regulating and reversing lever (3 is in its vertical or middle position, one spring-actuated contact 17 engages the insulating block which is between the n'ietal segments 18 and 19, and the other spring-actuated contact 17 engages theinsulating block between the metal segments 20 and 21, which results in an open circuit. W hen the lever (5 is advanced toward the left, as in 1, the spring-actuated eontacts 17, 17 the same time engage the metal contacts 18 and 20 respectively. The circuit is then closedfrom the post 22 to the segment 18, through the metal contact 17, across the usual rotor, through cross-coin nected brushes to the other spring-actuated contact 17 engaging the metal segment 20 which is connected to the'line post 24. In this position the armature will rotate in the direction opposite to the motion of the lever.

and upon its the lever is advanced, the brushes will reach a more advantageous position as regards speed, and the motor will increase inspeed unti the metal contacts reach the full range of their motion which corresponds to the position of the brushes for greatest torque. When the lever is reversed, the spring- actuated contacts 17, 17 will still engage the metal segments 18 and 20, but the angular position of the brushes will be changed, gradually reducing the speed until the spring actuated contacts 17, 17 again rest upon the flush insulating blocks between the adjacent ends of segn'lents 18 and 19, and Q0 and 21 respectively, and open the circuit. This corresponds to the position of the brushes at which there is no tendency of the rotor to turn in either direction.

The type of motor for which the controller which is herein shown and described is particularly designed, is a four-pole, alternating-current commutating motor, of such construction that to speed is controlled by ting the brushes. The brushes are so located. and the electrical connections are such that when the lever (3 is at elther l mit the motor and there is a corresponding re-.

duction in the current, hence when the circuit opened. by the passage'of the contact members 17 off fromthe contact segments tl the contact F no arcing, as the current will have been reduced to i minimum before the contact is broken. ovement of the lever 6 beyond the vertical position carries the contacts 17 into engagement with the other set of contact segments, and causes the motor to run in the reverse direction.

segments, there will be little or 1e insulated segments between Although but one specific embodiment of this invention is herein shown and described, it Will be understood that numerous details of the construction shown may be altered or omitted, within thescope of the following claims, Without departing from the spirit of this invention.

It. Ina motor, the combination of an end cap for the stator frame, a shaft bearing carried by brackets on said cap, a brush holder ring rotatably mounted on said cap concentric with said shaft bearing, brush holders mounted on said ring and adapted to hold brushes in position to bear upon a con'unutator'located between said shaft bear ing and said ring, contact members mounted on the inner face of said ring and extending into the spaceinclosed by said cap, a series of stationary contacts mounted within said cap in position to be successively engaged by said contact members through the rotation of said ring, and means for rotating said ring.

2. In a motor end cap, the combination of an annular disk, flanges integral with said disk for attaehingit to a motor frame, a

groove in one face of said disk, a ring seated in said groove, removable means for retaining Sflldl'Hlg shdably in said groove,

, brush holders mounted on the outer face of said ring, contact members mounted on the inner face of said ring, and extending into the space inclosed by said cap a series of stationary contacts mounted'within said cap in position to be successively engaged by said contact members through the rotation of said ring, and means for rotating said ring. Signed at Chicago this 3rd day of Sept. 1909.

AUSTIN KlMBLltl.

itness'es CUcnxn A, RUMMLER, EnwiN li-nctrs.

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