US791464A - Electric-motor-controlling device. - Google Patents

Description

A. E. HANDY.

ELECTRIC MOTOR CONTROLLING DEVICE.

APPLICATION FILED SEPT. 19, 1904.

PATBNTED JUNE 6, 1-905.

Shrouds;

No. 791,464. Patented June 6, 1905.

UNITED STATES PATENT OFFICE.

ARTHUR E. HANDY, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO THE RHODE ISLAND ELEVATOR AND HACHIN E COMPANY, OF PROVIDENCE, RHODE ISLAND, A CORPORATION OF RHODE ISLAND.

ELECTRlC-MOTOR-CONTROLLING DEVICE.

SPECIFICATION forming part of Letters Patent No. 791,464, dated June 6, 1905.

Application filed September 19, 1904. Serial No. 225,084.

T all 1071107771 it y 0071067771" at right angles to that shown in the drawings Be it known that I, ARTHUR E. HANDY, a and establish the necessary connection to opresident of the city of Providence, in the county erate the motor at double the lifting capacity, of Providence and State of RhodeIsland, have as hereinafter more fully described.

5 invented certain new and usefulImprovements At is the solenoid-magnet, and F the rein Electric-Motor-Controlling Devices; and I ciprocating core thereof. On this core are do hereby declare that the following is a full, located two contact cross-bars Grand H. When 5 5 clear, and exact description thereof, reference the core E is in its down position, the bar G being had to the accompanyingdrawings, and engages the contact pieces c a and g g, mak- 10 to the letters of reference marked thereon, ingan electrical connection between each pair. which form a part of this specification. WVhen the core is in its up position, the bar This invention relates to anelectric-motor- H engages the contact-pieces v1 and v1, estab- 6o controlling device, and has for its primary lishing a connection between them. K is the object the construction and arrangement of motor-armature with a double winding and 5 an attachment to an electrically-operated elehas two commutators m and m. one at each vator whereby the torque of the motor may be end thereof. controlled from the car at will to increase or I do not wish to be confined to the exact 5 decrease the lifting capacity of the elevator. construction of switch shown and described,

The invention is fully set forth in this specias it may be varied to suit the various coniication and more particularly pointed out in ditions under which my apparatus is operated.

the claims. To enable others skilled in the art to apply In the accompanying drawings, Figure 1 is and use my invention, I will now more fully 7 a diagrammatic view illustrating one arrangedescribe the operation of the same. ment of mechanism for controlling the action It is found in the practical construction and 5 of the electric current to the motor. Fig. 2 operation of electric elevators to be desirable represents the two separate windings on the and often necessary for the motor to raise a armature. heavier load than it was originally designed Referring to the drawings, Ais the controlto carry at its maximum speed. In order to ling-handlelocated within the car and manipumake the machine do this, it has been cus- 3 lated by the operator. This handle is contomary with the old-style motor to have an nected through lever a with the disk B, which attachment of gearing similar to the ordinary disk is mounted to rotate on the fixed plate back gearing on a lathe, which is thrown in by C, and through connections (not shown) arhand and acts to increase the lifting capacity ranged to start and stop the car-operating moof the elevator. My improved construction 35' tor. Through this disk B is a slot or chanis for the purpose of doing away with the nel 6, made on the arc of a circle. Projectback gears and accomplishing the result elecing outwardly from one end of this auxiliary trically, controlling the lifting capacity of the 8 5 switch-bar D is the handle (Z, while the pin 6 elevator from the car, the essential features projects inwardly from the opposite end of of my invention being a device for increasing 4 said bar. the lifting capacity of an elevator by using a c and c are contact-pieces located on the double commutator-motor with two separate fixed plate C. windings on the armature, one-half of said IVhen it is desired to make a connection bewinding leading to one commutator and onetween the contact-pieces cand c, the hand-lehalf to the other. A simple and handy aux- 45 Ver A must be brought to the center or stop iliary switch D is placed in the car, by which position in order to bring the channel 6 in pothe motor-windings, through the action of the sition for the pin 0 to pass through it. The solenoid-switch E, may be made to run either bar may then be swung around to a position in series or parallel, thus causing the motor to capacity.

change from one-half the speed and double the pull to double the speed and one-half the pull, which changes are effected as follows: When the core of the solenoid-switch E is down in its ordinary running position, as illustrated in the drawings, the current enters on line and proceeds to the point r where the current is divided, one portion going to the contact-piece e, thence through bar Gr to contact-point a, thence up line 0" to contact-point z" and from 1" through line r passing through the commutator m and out through line 91 the other portion of the current going down line n, through commutator m, up line 71' to contact 2', down line i to contact g, across on bar Gr to 9, down line 7 and out. The armaturewindings of the motor are then said to be connected in multiple, and the motor will run with its maximum speed, but with one-half of its maximum torque, which is the ordinary condition under which the elevator is operated. When it is desired to raise a heavier load than can be done through the multiple winding, the direction of the current through the windings must be changed from multiple to series. To do this, the operator brings the starting-lever A to the central position, as shown in the drawings, and the motor is stopped. Then the auxiliary switch-lever D may be moved over to a position at right angles to that shown in the drawings, makinga connection between contact-point 0 and 0, and allowing the current to flow in through line 8 and 8, thus energizing the solenoid-magnet a, drawing up its core F, and bringing the contact-bar H into connection with the points c' and 11. The current will then enter through the line r, pass down line at, through commutator m, up line n to contact 6, across bar H to contact z, down line 1*, through commutator m, and out through line m when said winding will be run in series which gives it one-half the speed with double the pulling or lifting capacity. The development of footpounds in both of the above cases is the same, the result being full speed at one-half lifting capacity or one-half speed with double lifting My improved device for controlling the torque or pulling capacity of an electric motor is not confined to elevators alone, but may be operated on any mechanism which may require such a device. The motors may also be wound so that any desired increase of torque may be obtained.

' 'Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a device of the character described, an electric motor having two commutators and two separate windings on the armature, means including an electromagnet for changing the connection to the winding of the armature only when the main switch is in its off position so that said windings will run either in series or in multiple, to vary the torque of the motor.

2. In a device of the characterdescribed, an electric motor having two commutators and two separate windings on the armature, means including an electromagnet for controlling the flow ofthe current to said armature, so that said windings may be made to run either in series or in multiple, to vary the torque of the motor.

3. In a device of the character described, an electric motor having two commutators and two separate windings on the armature, an auxiliary switch, an electromagnet caused to be energized and deenergized by the movement of said auxiliary switch to move contact-bars into and out of connection, and control the flow of current to said armature, so that said windings may be made to run either in series or in multiple, to vary the torque of the motor.

4. In a device of the character described, an electric motor having two commutators and two separate windings on the armature, a switch for controlling the flow of the current to said armature, means whereby said switch can only be thrown when said motor is at rest, so that said windings may be made to run either in series or in multiple, to vary the torque of the motor.

5. In a device of the character described, an electric motor having a double winding and two commutators, an auxiliary switch, an electromagnet controlled in its action by the movement of said auxiliary switch to throw the windings on said armature from multiple to series and vice versa, means whereby said switch can only be made to make or break the connections to said magnet when the motor isat rest.

6. In a device of the character described, an electric motor having two commutators and two separate windings on the armature, an auxiliary switch, an electromagnet caused to be energized and deenergized by the movement of said auxiliary switch to move contactbars into and out of connection, and control the flow of current to said armature, so that said windings may be made to run either in series or in multiple, to vary the torque of the motor, means whereby said magnet can only be moved when the motor is at rest.

7 In an elevator-controlling device, an electric motor for actuating the elevator-car, said motor having a double winding and two commutators, an auxiliary switch located within the car, an electromagnet controlled in its action by the movement of said auxiliary switch to throw the windings of said armature from multiple into series and vice versa to vary the torque of the motor.

8. In an elevator-controlling device, an electric motor for actuating the elevator-car, said motor having a double winding and 'two commutators, an auxiliary switch located within the car, an electromagnet controlled in its action by the movement of said auxiliary switch to throw the windings of the armature from multiple into series and vice versa, means whereby said switch can only be moved to make or break the connection to said electromagnet when the motor is at rest,

9. In an elevator-controllingdevice, an electric motor for actuating the elevator-car, said motor having a double winding and two commutators, a controlling-lever within the car for starting and stopping the same, an auxiliary switch, an electromagnet controlled in its action by the movement of said auxiliary switch to throw the windings of the armature from multiple into series and vice versa, means whereby said switch cannot make or break the connection to said magnet, until said controlling-lever is in its central or stop position.

10. In an elevator-controlling device, an electric motor for actuating the elevator-car, said motor having a double winding and two commutators, a controlling-lever within the car for starting and stopping the same, a slot in said lever, an auxiliary switch, a projection in said switch to register with the slot in said lever only when said lever is brought to its central position, an electromagnet controlled in its action by the movement of said auxiliary switch to throw the windings of the armature from multiple into series and vice versa to vary the torque of the motor.

In testimony whereof I have hereunto set my hand this 16th day of September, A. D. 1904.

ARTHUR E. HANDY. In presence of HOWARD E. BARLOW, E. I. OGDEN.

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