US738393A - Apparatus for remote control of electric motors. - Google Patents

Description

A PATBNTED SEPT. 8,1903. w. v. ASH. j APPARATUS FOR REMOTE CONTROL OF ELECTRIC MOTORS.

APPLIUATION.IIL'ED JAN. 2, 1902. v

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APPARATUS FOR REMOTE CONTROL OF ELECTRIC MOTORS.

APPLICATION FILED JAN. 2, 1903.

No. 738,393. PJAYIENTBDSEPTJ,1903. I

4 W. v. ASH. I

APPARATUS FOR REMOTE CONTROL; @P ELEUIRIO MOTORS.

APPLICATION FILED JAN. 2-, 19o a;.

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WITNESS-ES: JNVENTOR W, Q Wa-ltr V.Ash

' handle, and a second electromagnetic device iio. 738,393.

UNITED STATES Patented September 8, 1903.

PATENT OFFICE.

WALTER v. ASH, OF PERTH AMBOY, NEW JERSEY.

SPECIFICATION forming part of Letters Patent No. 738,393, dated September 8, 1903.

Application filed January 2, 1903.

To all whom it may concern.-

Be it known that I, \VALTER V. ASH, a citizen of the United States of America, and a resident of Perth Amboy, in the county of Middlesex and State of New Jersey, have invented certain new and useful Improvements in Apparatus for Remote Control of Electric Motors, of which the following is a specification.

The invention herein described belongs to that class which includes means for controlling electric motors, but more particularly it relates to starting and stopping and reversing a motor from a distance.

The organization comprising the invention consists of a rheostat, a handle therefor, an electromagnetic device for controlling said for controlling the current of said first device and a manual circuit-closer in circuit with the second-named electromagnetic device.

Figure 1 is a general view in elevation and partly in section with a diagram of the circuits for a series motor. Fig. 2 is a side clevation of the mechanical portion of the device, showing especially the spring for returning the handle to its central normal position. Fig. 3 is a diagram of the wiring, which will assist in the understanding of Fig. 1, the handle I being omitted, and some other mechanical parts, as the cord K, being omitted.

At 1 is the field-magnet of the motor.

At A is the armature with the leads A and A A.

2 and 2 are the binding-posts for the terminals for the field-magnet 1.

3 and 4: represent terminals adapted to be closed by the circuit-closer B,which is carried by the core 0 of a solenoid D, whichis adapted to actuate said circuit-closer against themtion of a spring E. This construction of the electromagnetic circuit-closer is contained in a cylinder F, and a similar construction 13 is for the purpose of closing the circuit of the main-line conductors G H through the larger solenoid 5, whose core throws the handle I of the rheostat for the starting of the mot-or, whose armature is A and whose field-m agnet is 1. To this end the core J of the solenoid 5 is attached to a cord K, whose other end is fastened to the handle I, so that when the core J descends the handle I will be thrown to the right for cutting out resistances L of the rheo- Serial No, 137,523. (No model.)

stat. The solenoid D, that is controlled from a distance, is also connected up to the main line conductors G and II in the following manner: The distant switch is S and the circuit, as will hereinafter be traced, includes the main-line conductors G and H and the solenoid D. The operation of the switch S to the terminal S for closing the circuit will start the motor, the opening of the said switch will stop the motor, the closing of said switch against the terminal S will reverse the motor, and by opening the switch again the motor will be stopped. It is evident that the switch S may be located at any distance from the rheostat. The switch is pivoted at the upper end at 8, so that the lower end may come in contact with the terminal S or S.

The current in starting from the main-line conductor G to the negative binding-post continues to the solenoid D and then to the single-pole double-throw switch,whose terminal is S, the switch being lettered S, and then a.

current goes to the other main-line conductor H, whereby the solenoid D is magnetized and the circuit-closer B closes the terminals 3 and 4, thereby causing the motor-circuit to be completed. The current from the conductor 11 flows through the field-magnet 1 to the binding-post 2, through the terminals 3 and 4, through the series magnet 5, through the resistances L, connecting the contact 6 in series to the fingers 7 on the handle I, (the contacts 6 being in the path of the fingers 7,) then to the contact 9 nearer the pivot M than the fingers 7 and located under the fingers 8 on the same handle, then to the plate 10, which is nearer the pivot M than the plate 9 and which is connected by the conductor N to the contact-plate 9 and which is located under the fingers 11, which are carried by the same handle, then to the fingers 11 and 12, to the plate 13, which is nearer the pivot H than the plate 10 and which extends to both sides of the handle I, which in this description is at its normal phase, and then by the conductor 0 to the negative binding-post, and so onto the main-line conductor G. This circuit excludes the armature A, but energizes the solenoid 5, which is in series with the fieldmagnet 1 and which by acting on the core J turns the handle I, together with the fingers 7, which action gradually excludes the resistances L. The fingers 11 and 12 make contact with the plates 13 and 15, which are in the path of the respective fingers 11 and 12, whereby the circuit is from the positive binding-post through the field-magnet 1 to the post 2, to the terminals and 4, through the solenoid 5 to the contactplate 6, through more or less of the resistances L to the contact-plate 14, which is in the path of the fingers 8, to the post A, to the armature lead A, through the armature A to the binding-post A A, to the plate 16, which is directly on the other side of the handle I from the plate 14, then through the conductor Q, which connects the plate 16 to the plate 15,and then through the fingers 11 and 12 to the plate 13, and then to the negative binding-post, and so on through the main-line conductors G and H. The motor-circuit may be opened again by openingthe switchS. The core J therefore rises and permits the spring R to push the handle I to its normal position, the spring being coiled around the hub of the handle I and one end resisted by a stop T on the base-plate U and the other pressing against a pin V, carried by the handle I. When the handle I reaches the first contact 6 and before any resistance is cut out, the armature is in circuit through fingers 8 and 11, making contact with plates let and 15.

The construction and operation for re versing the motor are similar to those for starting the motor, and the circuits and operation may therefore be easily understood from the drawings and adapted to motors with shunt or compound windings by those versed in the art. Those parts that are not lettered or described have nothing to do with the invention.

In order to modify the motion of the descent of the core J, which in effect is a piston, I provide Within the solenoid 5 a small port j with a spring-valve NV and an opening below the valve to the outside atmosphere through the screw-plug X, this detail acting as a cushion which will gradually yield.

I claim as my invention- 1. The combination of arheostat, a handle therefor, an electromagnetic device in series with said rheostat for controlling said handle, a second electromagnetic device for controlling the circuit of said first device, and an electric motor whose one element is in series with said rheostat and with the first device, the second device being in shunt to said element.

2. The combination of a rheostat, a handle therefor, an electromagnetic device in series With said rheostat for controlling said handle, a second electromagnetic device for controlling the circuit of said first device, a manual circuit-closer in circuit with the secondnamed electromagnetic device, and an electric motor whose armature is in series with said rheostat and with the first device, the second device being in shunt to said armature.

The combination of a rheostat, a handle therefor, an electomagnetic device in series with said rheostat for controlling said handle, a secondelectromagnetic device for con trolling the circuit of said first device, a manual circuit-closer in circuit with the secondnamed electromagnetic device, and an electric motor whose one element is in series with said rheostat and with the first device, the second device being in shunt to said ele ment.

4. The combination of arheostat, a handle therefor, an electromagnetic device in series with said rheostat for controlling said handle, a second electromagnetic device for controlling the circuit of said first device, a manual circuit-closer in circuit with the secondnamed electromagnetic device, an electric motor whose one element is in series with said rheostat and with the first device, the second device being in shunt to said element, and a pair of main-line conductors for supplying current to said devices and to said motor.

5. The combination of a rheostat, a handle therefor, an electromagnetic device for controlling said handle, a second electromagnetic device for controlling the circuit of said first device, a manual circuit-closer in circuit with the second named electromagnetic device, an electric motor whose one element is in series with the first device, the second device being in shunt to said element, a pair of mainline conductors for supplying current to said devices and to said motor, and two other de vices similar to the two first named, and similarly electrically connected up withsaid mainline conductors for moving said handle in the opposite direction.

6. The combination of a rheostat, a handle therefor, an electromagnetic device for controlling said handle, a second electromagnetic device for controlling the circuit of said first device, a manual circuitcloser in circuit with the second-named electromagnetic device, an electric motor whose one element is in series with the first device, the second device being in shunt to said element, a pair of main-line conductors for supplying current to said devices and to said motor, and two other devices similar to the two first named, and similarly electrically connected up with said main-line conductors for moving said handle in the opposite direction, the same manual circuit-closer controlling the current for both of the shunt-magnets.

7. The combination of a rheostat, a handle therefor, an electromagnetic device in series with said rheostat for controlling said handle, a second electromagnetic device for controlling the circuit of said first device, mainline conductors, a manual switch for controlling the current from said conductors for the second-named device, and an electric motor whose armature is in series with said rheostat and with the first device, the second device being in shunt to said armature.

S. The combination of a rheostat, a handle therefor, an electromagnetic device in series with said rheostat for controlling said handle, and a second electromagnetic device for controlling the circuit of said first device, the electromagnetic device consisting of a solenoid, a core therein movable up and down like a piston, and a spring-valve for a gradual exit of air from the solenoid.

9. The combination of a rheostat, a handle therefor, an electromagnetic device for controlling said handle, a second electromagnetic device for controlling the circuit of said first device, the electromagnetic device consisting of a solenoid, a core therein movable up and down like a piston, and a valve for a gradual exit of air from the solenoid, a second core and solenoid, and cords connecting said cores to said handle.

10. The combination of a rheostat, a handle therefor, an electromagnetic device in series with said rheostat for controlling said handle, a second electromagnetic device for con.- trolling the circuit of said first device, the electromagnetic device consisting of a solenoid, a core therein movable up and down like a piston, and a spring-valve for a gradual exit of air from the solenoid; a second core and solenoid, and cords connecting said cores to said handle.

11. The combination of a rheostat, a handle therefor, an electromagnetic device in series with said rheostat for controlling said handle, a second electromagnetic'device for controlling the circuit of said first device, a manual circuit-closer in circuit with the second-named electromagnetic device an electric motor whose one element is in series with said rheostat and with the first device, the second device being in shunt to said element, a pair of mainline conductors for supplying current to said devices and to said motor, and two other devices similar to the two first named, and similarly electrically connected up with said main-line conductors for moving said handle in the opposite direction.

12. The combination of a rheostat,a handle therefor, an electromagnetic device in series with said rheostat for controlling said handle, a second electromagnetic device for controlling the circuit of said first device, a manual circuit-closer in circuit with the second-named electromagnetic device, an electric motor whose one element is in series with said rheostat and with the first device, the second device being in shunt to said element, a pair of main-line conductors for supplying current to said devices and to said motor, and two other devices similar to the two first named, and similarly electrically connected up with said main-line conductors for moving said handle in the opposite direction, the

same manual circuit-closer controlling the current for both of the shunt-magnets.

Signed this 27th day of December, 1902. XVALTER V. ASH. [L. s] Witnesses:

J. M. LANNING, H. O. BISHOP.

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