US1016460A - Starting mechanism for electric motors. - Google Patents

Description

J. J. WALSER.

STARTING MECHANISM FOR ELECTRIC MOTORS.

APPLIGATION FILED JULY 30, 1910.

1,016,460, Patented Feb. 6, 1912.

COLUMBIA PLANOGRAPH (20.. WASHINGTON. D. c.

UNITED STATES PATENT OFFICE.

JOSEPH J. WALSER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE GOSS PRINTING PRESS COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

STARTING MECHANISM FOR ELECTRIC MOTORS.-

Specification of Letters Patent.

Patented Feb. 6, 1912.

Original application filed October 11, 1909, Serial No. 522,128. Divided and this application filed July 30,

To all whom it may concern Be it known that I, J OSEPH J. WVALsER, a citizen of the United States, residing at Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Starting Mechanism for Electric Motors, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to starting mechanism for electric motors. As is well known, it is necessary in starting an electric motor to turn on the current very gradually if in jury to the apparatus is to be prevented.

It is the object of my invention to provide new and improved mechanism by which by the movement of. a lever quickly to fullspeed position the controller of an electric motor may be moved gradually without further attention on the part of the operator to turn on the current. I accomplish this object by the means shown inthe drawings and hereinafter specifically described.

That which I believe to be new will be set forth in the claims.

This application is a divisional application, having been divided out of an application for patent on variable speed driving mechanism, Serial No. 522,128, filed by me on October 11, 1909.

The drawing is a side elevation of one form ofmy improved device.

indicates a part of a frame, on which is located a controller 11, connected with line wires 12, and connected by wires 13 with an electric motor 14.

15 indicates a lever pivotally mounted on the framework 10 on a bracket 16.

17 indicates an arc-shaped rack at any of three points along which said lever 15 is adapted to be set as hereinafter described by means of a latch 18, preferably being adapted to be set as indicated at either full-speed position, a moderately low-speed position, or at olf position,that is, in a position such that no current is delivered to the motor, as will be understood.

192O indicate blocks mounted in a cylinder 21 with a spring 22 interposed between them and tending to hold them at the limit of their movement apart, the block 19 being fixed in one end of the cylinder and the block being slidable therein but prevented from withdrawal therefrom. 23 indicates a rod connecting said block 20 with the lower end of the said lever 15.

24 indicates a rod connecting the block 19 with the lower end of an arm 25 depending from a sleeve 26 journaled upon a shaft 27 one end of which is secured in a bracket 28 depending from the framework 10, the other end of said shaft being adapted to be supported in any appropriate manner.

29 indicates an arm rising from the sleeve 26, its upper end being pivotally connected to an intermediate point of the rod 30, one end of which rod 30 is pivotally connected to the lower end of the controller arm 31, the other end being connected to a piston 32 adapted to slide air-tight in a dash-pot 33 secured in any appropriate manner on said framework 10, there being an opening 34 in one end of said dash-pot for the passage of air.

35 indicates a sleeve secured in position on the rod 23 by means of a set-screw, rising from which sleeve is an arm 36.

37 indicates a sleeve mounted on a shaft 38 secured in a bracket 39 depending from the framework 10, from which sleeve 37 depends an arm 40 provided with a pin 41 extending into the path of the arm 36 as it is moved with the rod 23 as hereinafter described.

42 indicates an arm rising from the sleeve 37, pivoted to the upper end of which is a rod 43, the lower end of which rod is pivotally connected to the lower end of an arm 44 which is rigidly secured to a sleeve 45 mounted on a shaft 46 suitably secured in the framework of the machine.

47 indicates a perforated lug secured to the lower surface of the sleeve 26, through which lug extends a rod 48 one end of which is pivotally connected to the arm 40.

49 indicates a collar located on the rod 48, and 50 indicates a coiled spring on the rod 48 between the collar 49 and the lug 47.

51 indicates an arm extending substantially horizontally from the collar 45, having a hooked end 52, adapted to engage a notch 53 in the upper surface of the sleeve 26 as hereinafter described.

1th the parts in the position shown in the drawings, with the lever 15 latched in full-speed position, the controller arm 31 also stands in full-speed position and the motor of course is actuated by the full current available. If it is desired to bring the motor to a slower speed of operation, the lever 15 is to be moved to the right to the slow-speed position, this movement of the lever drawing the arm 25 to the left, and the arm 29 to the right, moving the rod 30 to the right and consequently moving the controller-arm also to the right to the slowspeed position. The same movement of the lever 15 will of course have moved the arm 36 to the left so as to permit the spring 50 to move the arm 40 to the left, the arm 43 to the right, the rod 43 downward and to the right, the arm 44 to the right, and the hooked end 52 of the arm 51 downward into engagement with the notch 53 as soon as the sleeve 26 is turned sufficiently to permit of it, the parts being so arranged in the construction shown that the hooked end 52 en gages the notch at just the end of the movement of the lever 15 to slow-speed position. If thereafter it is desired to stop the motor entirely, the lever 15 is moved to the off position, moving the controller-arm also to the off position and stopping the motor. This can be done at one movement from the position shown in the drawings, if desired, without setting the lever 15 at the slowspeed position. With the parts in'oflt' position, the square face of the notch 53 is of course a short distance to the right of the hooked end 52 of the arm 51.

When it is desired to start the motor again, the movement of the lever 15 to the slow-speed position causes the controllerarm 31 to be moved to slow-speed position, in which position the parts are left if desired. This movement of the lever of course again brings the sleeve 26 into such position that the hooked end 52 of the arm 51 engages the notch 53. lVhen the lever 15 is moved then to the full-speed position, the arm 51 prevents the rotation in a counter clockwise direction of the sleeve 26, but .the lever is forced to the left to full-speed position by reason of the spring 22 being interposed between the blocks 19-20 in the cylinder 21, said spring being of course compressed by this operation. Just before the lever 15 reaches the limit of its movement to full-speed position, the arm 36 is brought into contact with the pin 41 of the arm 40, rocking the arm 40 to the right against the action of the spring 50, rocking the arm 42 to the left, moving the rod 43 and arm 44 to the left, lifting the arm 51, and releasing the hooked end 52 from the notch 53 in the sleeve 26. The compressed spring 22 then operates to move the arm 25 to the right and the arm 29 to the left, this movement being accomplished against the action of the dash-pot 33, as will be readily understood, and the movement of the rod 30 and the controller-arm 31 to the left to fullspeed position is accordingly slow and regular as is desired.

What I claim as my invention and desire to secure by Letters Patent is,

1. In combination, a motor, a controller therefor, a lever, connections between said lever and said controller whereby a partial stroke of said lever moves said controller simultaneously into slow speed position, said connections including a spring interposed between said lever and said controller and adapted to be compressed by the further movement of said lever and by its resiliency to move said controller into high speed position, means for preventing the operation of said spring to move said controller into high speed position until just before said lever reaches the limit of its stroke, and means acting against said spring to cause said controller to be shifted gradually by said spring to high speed position.

2. In combination, a motor, a controller therefor, an intermediate lever by the movement of which said controller is moved into high speed position, a hand-lever, resilient connections between said two levers, a catch adapted to preventthe stroke of said intermediate lever to move said controller into high speed position, and means actuated near the end of the stroke of said handlever to release said catch.

3. In combination, a motor, a controller therefor, an intermediate lever by the movement of which said controller is moved into high speed position, a rod pivotally connected to said intermediate lever, a cylinder secured thereto, a second rod slidably mounted in said cylinder, a compression spring interposed between said rods in said cylinder, a hand-lever to which said second rod is pivotally connected, a spring-seated catch adapted to prevent the stroke of said intermediate lever to move said controller into high speed position, and means carried by said second-named rod adapted near the end of the stroke of said hand-lever to release said catch.

4. In combination, a motor, a controller therefor, an intermediate lever by the movement of which said controller is moved into high speed position, a hand-lever, resilient connections between said two levers, a bellcrank lever adapted to catch and hold said intermediate lever against turning to move said controller into high speed position, a spring tending to hold said bell-crank lever in engagement with said intermediate lever, and means actuated near the end of the stroke of said hand-lever to release said catch from said intermediate lever.

JOSEPH J. VVALSER. Witnesses V. H. DE BUSK, M. A. HUNTER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, .D. G.

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