US765460A - Motor-controller. - Google Patents

Description

No. 765,460. PATENTED JULY 19, 1904. H. H. CUTLER.

MOTOR CONTROLLER.

APPLICATION FILED JAN. 30, 1901.

N0 MODEL. 2 SHEETSSHEET 1.

No. 765,460. PATENTBD JULY 19, 1904. H. CUTLER.

MOTOR CONTROLLER.

APPLIUATION FILED JAN. 30, 1901.

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PATENT OFFICE.

HENRY H. CUTLER, OF MILIVAUKEE, \VISCONSIN.

MOTOR-CONTROLLER.

SPECIFICATION forming part of Letters Patent No. 765,460, dated July 19, 1904.

Application filed January 30, 1901. Serial No. 5,306. (No model.)

To all whom it may concern.-

Be it known that I, HENRY H. CUTLER, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a certain new and useful Improvement in Motor-Controllers, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to a motor-controller, more particularly a system of controlling motor-driven pumps by means of variations of pressure of a confined liquid or gas, although my invention is equally applicable to other purposes, as will readily appear to any one skilled in the art.

In accordance with my invention in the embodiment thereof which I have shown herein to illustrate the nature of my invention I provide a pressme-regulator responding to the variations of pressure of the fluid and adapted, through the agency of electrical means, to control the electric motor used for driving apump or other device.

I have illustrated my invention in the accompanying drawings, in which- Figure l is a view thereof, showing the circuits in diagram. Fig. 2 is a detailed view of the pressure-regulator. Fig. 3 is an end view looking at one end thereof. Fig. 4: is an end view looking at the opposite end. Fig. 5 is a partial top view. Figs. 6 and 7 are detailed views of the rocking switch-arm.

Like characters refer to like parts in the several figures.

The diaphragm a is clamped between two castings or disks (0 a, rubber bushings a a being interposed between said diaphragm and the respective disks. Resting upon the diaphragm is a standard 6, carrying a rod 5, having at the upper end a knife-edge adapted to engage a V-slot in a bar 6 inset into the lever 0. The lever c carries at the end a bar 6 having knife-edges adapted to engage a V-slot in a steel bar I), carried upon an arm a, mounted upon the disk 6/. An adjustable screw or stop 0' limits the downward movement of the lever 0, while a screw 0 carried upon the standard 0 limits the upward movement of the lever c. The fluid is admitted to the under face of the diaphragm a through a pipe d. The lower disk a is formed integral with a part a, which is adapted to be screwed to the transverse bars (Z (Z by means of the screws d d".

Upon the free end of lever 0 is carried an arm 0, extending at right angles and carrying in the end a plurality of holes 0 Mounted opposite the arm 0" is a bracket a, carrying a portion 0', extending at right angles and provided with a slot c In the face of the part a are a pair of V-slots a e, and a U-shaped piece of metal f is provided with a knife-edge upon each of its members, said knife-edges being adapted to rest in said V-slots. Resting between the members of the U-shaped piece f is a coiled spring f, one end being connected with said piece f and the other being passed through one of the holes 0 in the arm 0. The U-shaped piece f, which constitutes a switcharm, carries in the end a carbon rod or contactf The switch-arm f rocks about the knife-edges carried thereon and when in the lower position engages a carbon contact or brush f mounted upon the standard f*, and when in the upper position engages an adjustable stopf The brush f may be adjusted in position relatively to the standard f to limit the downward movement of the switcharm. The brush f is electrically connected with a binding-post f, and a binding-postf is electrically connected with the bracket 0.

With the parts in the position shown in i Fig. 2 an increase of pressure beneath the diaphragm a causes lever 0 to move upward, rocking upon its pivot, and moves upward the arm 0*, thereby raising the end of the spring f. When the end of the spring f has been carried above the center of support of the switcharm f a sufficient distance to overcome the weight and friction of the arm f, the said arm f will be suddenly thrown upward against the stop f thereby separating the brushes f and f and opening the circuit therethrough. Likewise a decrease of pressure beneath the diaphragm permits the arm 0 to descend, and when the end of the spring has been lowered sufiiciently the switch-arm f is rocked, due to the tension of the spring, and is thrown downward to carry the carbon brushes. into contact.

The binding-post f 7 is connected by a conductor 2 with one end of the winding 9' of a magnet the other end of said winding being connected by a conductor 3 with a carbon brush it, normally resting against a carbon block it, carried upon a lever 71?, pivoted at if. The resistance it" is interposed between the brush it and the lever 7L2. From the lever A a conductor 1 extends to a binding-post Z: and thence a conductor 5 extends to one side of the supply-circuit.

The binding-post f is connected by a conductor 6 with one side of the winding Z of a magnet Z, the other end of said winding being connected with a lever m, carrying upon the end a carbon block on, normally engaging a brush m The brush m is connected by a conductor 7 with binding-post Zr. From binding-post 7a a conductor 8 extends through the field-windings 0 0 of the motor 0 and thence by the conductor 9 to the opposite side of the supply-circuit. The conductor 10 extends from conductor 9 to conductor 6. From conductor 9' the circuit extends through the armature 0 of the motor, thence by a conductor 11 'to the binding-post k and by the conductor 12 to the contact-arm p of the rheostat. The end of the contact-army) is adapted to travel over a series of terminals 19' 12, between which are connected the resistancecoils p 19 One end of the resistance is connected by a conductor 13 with contact '1" and by a conductor 14 with contact 0*. Contact 7 is connected by a conductor 15 with a bind ing-post is. The binding-post 7c is connected by a conductor 16 with contact 0 and when magnet g is energized the contacts 9* and r are adapted to be closed together through contact-arm 97 The contact-arm p of the rheostat is connected by conductor 17 with contact T and the spring r carried upon the contact-arm, is adapted to bridge together contacts 1" and o when contact-arm p is in po sition to remove all of the resistance from circuit. The dash-pot s is connected with contact-arm p to regulate and control the movement thereof. When the contact-arm p is in the lower position shown, an insulating-block 23 engages the end of lever 7L thereby closing together brushes it and it to short-circuit the resistance if. When the contact-arm p is movedto cut out any of the resistance, the block t is moved away from the lever b and the brush it drops away from brush it, thereby connecting resistance if in circuit.

The operation is as follows: Assuming that the pressure beneath the diaphragm has fallen to the lower predetermined limit, the clownward movement of arm 0* causes the brush f to be thrown into contact with the brush f Circuit is thus closed from conductor 9 over conductor 10, binding-post f brushes f f binding post f conductor 2, winding g, conductor 3, brushes it and /t,conductor 4, and conductor 5 back to opposite side of the supply-circuit. Magnet g is thus energized,there-' by moving arm r into contact with contacts and r Circuit is thus closed through the fields 0 0 of the motor, thence by conductor 8, conductor 15, contact 1", contact r contact 9 conductors 16 and 5 to the opposite side of the supply-circuit. Circuit is also closed from conductor 9 overconductors l0 and 6, winding Z of magnet Z, brushes m and m conductor 7, contacts 9*, T and r conductors 16 and 5 to the opposite side of the circuit. Magnet Zis thus energized and attracts its core Z which is connected with arm p. The contactarm is thus caused to move over the terminals 12 to cut out the resistance The motor is thus gradually started in motion. When the fluid-pressure beneath the diaphragm rises above the prearranged Value, the ascent of the arm 0 causes the switch arm f to be thrown upward, thereby separating brushes f and f The separation of brushes f and f opens the circuit through magnet 9, thereby permitting the contact-bar r to fall, thus opening the circuit through the motor. The circuit through magnet Z is likewise opened and the contact-arm p and core Z descend, due to their own weight. The variation of fluidpressure is thus caused to operate the switcharm f to thereby control the circuit through the motor-controller. The brushes f and f instead of serving to control the relay-magnet g, as shown, may be included directly in the motor-circuit. This, however, would necessitate the employment of larger contacts, and I preferably,therefore, employ the contacts f and f for operating a relay, which in turn controls the motor-circuit.

The function of the brushes h and /L is as follows: Should for any reason the contactarm 9 stick in its upper position and fail to descend to the lower position, the brushes Z1, and it would remain separated, and the circuit through the winding g when brushes f 2 and f are closed together would include the resistance 7t, and the resistance of the circuit would thus be so great that the magnet g would not be sufliciently energized to raise the bar r When the arm 3) is in its lower position, however, the brushes h and h are in contact, and the resistance 7L4 is short-circuited. WV hen the arm 19 is raised, the brushes it and h are separated; but the current flowing, due to the presence of resistance if, is suflicient to maintain the bar 1 in its upper position, although it is not sufiicient to lift the same into that position. The pressure at which the lever 0 moves may be adjusted by moving the weight back and forth. To adjust the range of the device, the stops f and f may be varied in position. Thus if a long range be desiredsay to open the circuit when the pressure rises to eighty pounds and to close it when the pressure falls to sixty-the stops f and f would be adjusted to permit a long movement of the arm 0 before moving switchthrough said relay, substantially as described.

arm On the other hand, if thera nge be, say. between sixty-five and seventy-three pounds the stops f and f would be moved closer together, so that the switch-arm would be thrown by a much shorter movement of the arm 0*. By this adjustment of the stops any desired range may be obtained. It will be noted that the brush f which forms one of the stops, may be adjusted in the bore in the standard f and held in any adjusted position by a set-screw and the adjustable plate shown, which has a slot permitting adjustment beneath the head of the screw. When the rheostat-arm 19 reaches the uppermost position, it strikes the small arm m at the upper end of the lever m of the usual short-circuiting switch and rotates said lever, so as to separate the contacts m and of, thus removing the short circuit around the usual resistance commonly employed with self-starters for cutting down the strength of the current through the solenoid after the same has completed its working stroke. This resistance m is illustrated in dotted lines in Fig. 1 and is usually mounted upon the rear of the baseplate and suitably connected with the terminals of the shortcircuiting switch. This short-circuiting switch and associated resistance are old and well known in the art and form no partof the present invention.

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

1. The combination with a motor and a resistance therefor, of a relay controlling the circuit through said motor and resistance, and a device responsive to fluid-pressure for controlling the circuit through said relay, substantially as described.

2. The combination with a motor and a resistance therefor, of a relay controlling the circuit through said motor and resistance, a device responsive to fluid-pressure, and an oscillating switch-arm controlled by said device and serving to open and close the circuit 3. The combination with a motor and a resistance therefor, of a relay controlling the circuit through said motor and resistance, a fluid-pressure device having a prearranged range of movement, and switch-contacts operated by said device at the respective ends of its range of movement, substantially as described.

4. The combination with a motor and a resistance therefor, of a relay controlling the circuit through said motor and resistance, a device responsive to fluid-pressure and having a prearranged range of movement, and a switch-arm adapted to be rocked in opposite directions at the respective ends of said range and controlling the circuit through said relay, substantially as described.

5. The combination with a motor, and a resistance therefor of a relay to control the circuit through said motor and resistance, a fluid-pressure device having adiaphragm, and an arm moved thereby, a switch-arm and a spring between said fluid-pressure arm and the switch-arm adapted to be moved by the frame to opposite sides of the center of the support ofthe switch-arm to cause the latter to oscillate, said switch-arm being adapted to control the circuit through said relay, substantially as described.

6. The combination with a motor and a resistance therefor, of a relay controlling the circuit through said motor and resistance, a device responsive to fluid-pressure, and a pivoted switch-arm moving between stops and adapted in one position to close, and in the other to separate, a pair of contacts and arranged to be rocked by said device, said switch-arm serving to control through its contacts thecircuit of said relay, substantially as described.

7. The combination with a motor, and a resistance therefor, of a relay controlling the circuit through said motor and resistance, a switch-arm having a knife-edge pivot at its end, and a device responsive to fluid-pressure for controlling said switch-arm, said arm being adapted to open and close the circuit through said relay, substantially as described.

8. The combination with a motor and a resistance therefor, of a relay controlling the circuit through said motor and resistance, a rocking U-shaped switch pivoted at the ends of its two members, a coiled spring located between the members and having one end secured to the switch, and afluid-pressure device adapted to move the other end of the spring to, opposite sides of the pivots thereof, said switch being adapted to control the circuit through the motor, substantially as described.

9. The combination with a motor and the starting resistance therefor, of a relay for controlling the circuit through said motor and resistance, and a second resistance adapted to be included in circuit with said relay when the starting resistance or a part thereof is removed from circuit and to be cut out when the starting "resistance is in circuit, substantially as described.

10. The combination with a motor and the starting resistance, of a relay for controlling the circuit through the motor and for controlling the starting resistance, a second resistance in circuit with said relay, and means for removing said second resistance when the starting resistance is in circuit, and for inserting the same when the starting resistance is not in circuit, substantially as described.

1.1. The combination with a device responsive to fluid-pressure, of an oscillating switcharm mechanically connected therewith to he suddenly operated at the opposite limits of movement of the responsive device and having a knife-edge pivot at one end, and a motor controlled by said arms, substantially as described. v

12. The combination with a device responsive to fluid-pressure, of a U-shaped switch having a knife-edge pivot at the ends of both members, a spring located between the members of the switch and secured at one end thereto the other end of said spring being connected with said fluidpressure device to be moved on opposite sides of the pivots of the switch, and a motor controlled by the switch, substantially as described.

13. The combination with a device responsive to fluid-pressure, of an arm adapted to be moved thereby, a switch pivoted at one end, a coil-spring secured to said switch at one end, the opposite end of said spring being secured to said arm, and means for adjusting the connection of said spring and arm so as to vary the movement of the switch relatively to the responsive device, substantially as described.

14. The combination with a diaphragm responding to fluid-pressure, of a lever operated thereby, a laterally-extending arm fixed to said lever, a switch located upon a support, a spring extending between said arm and switch and adapted to be moved to opposite sides of the center of its support to cause the same to rock in both directions, and a motor controlled by said switch, substantially as described.

15. The combination with a diaphragm responsive to fluid-pressure, of a lever, a support for the lever at one side of the diaphragm, a bar connected with the diaphragm and pressing against the lever, knife-edge pivots between the lever and the support and bar, a switch controlled by said lever, and a motor operated by said switch, substantially as described.

16. The combination with a casting having a supporting-bracket formed thereon and a hollow portion adapted to be connected with a fluid-pressure system, of a second casting adapted to be secured upon said hollow portion, a diaphragm extending between said portion and secured at the edges thereto and adapted to respond to the fluid-pressure, a supporting arm or arms formed upon one edge of said second casting, a lever having a pivotsupported in bearings in said arm or arms, a standard carried by the diaphragm and bearing against the said lever to vibrate the latter in accordance with the variation of the fluidpressure, suitable stops mounted upon the opposite side of the casting to limit the vibration of the lever, a switch controlled by the lever and a motor controlled by the switch, substantially as described.

17. The combination with a device responsive to fluid-pressure, of a lever operated thereby, a weight carried by the lever and adjustable along the same, a snap-switch controlled by said lever, adjustable stops between which said switch operates, and a motor and a resistance therefor having their circuit opened and closed by the switch, substantially as de scribed.

18. The combination with a device responsive to fluid -pressure of a lever controlled thereby, a weight adjustable along the lever, a switch operated by said lever, said switch having a pivot-bearing at one end and adjustable stops between which the outer end of said switch operates, and a motor and resistances therefor having their circuit controlled by the switch, substantially as described.

19. The combination with a device responsive to fluid-pressure, of a lever operated thereby, a rocking switch controlled by the lever, a pivot for one end thereof, adjustable stops between which the other end of the switchoperates, and a motor and resistance therefor having their circuit controlled by the switch, substantially as described.

20. The combination with a device responsive to fluid-pressure, of a lever directly controlled thereby, adjustable stops between which said lever operates, a rocking switch controlled by the lever, the end of said lever being arranged to move on opposite sides of the fulcrum of the switch, a flexible connection between the lever and the free end of the switch, and a motor controlled by the switch, substantially as described.

21. The combination with a device responsive to fluid-pressure, of a lever operated thereby, adjustable stops between which the lever operates, a weight carried by the lever and adjustable along its length, a switch controlled by the lever, and a motor controlled by the switch, substantially as described.

22. The combination with a device responsive to fluid-pressure, of a lever operated thereby, adjustable stops between which said lever operates, a switch controlled by the lever, adjustable stops between which the switch operates, and amotor controlled by the switch, substantially as described.

23. The combination with a device responsive to fluid-pressure of a lever operated thereby, adjustable stops between which the lever operates, a weight carried by the lever and adjustable along its length, a switch rocked by the lever, adjustable stops between which the lever is adapted to rock, and a motor controlled by the switch, substantially as described.

24:. The combination with a device responsive to fluidpressure, of an arm operated thereby, a switch comprising a U-shaped memher, a support having a portion adapted to be secured to a suitable base and a portion at right angles thereto, said latter portion being provided with a slot and having upon each side of the slot a V-shaped groove, knife-edges formed upon the ends of the two members of the U-shaped switch and fitting within said V-shaped grooves, a spring located between the two members of the switch and extending through said slot, one end of the spring being secured to the switch and its opposite end to the arm, whereby when the arm is moved past the center of the pivots, the switch is rocked in the corresponding direction, and a motor controlled by the switch, substantially as described.

25. The combination with a motor, of means for varying the speed of said motor, a relay controlling the'circuit through said motor, and a device responsive to fluid-pressure for controlling the circuit through said relay, substantially as described.

26. The combination withamotor, of means for varying the speed of said motor, a relay controlling the circuit through said motor, a device responsive to fluid-pressure, and an oscillating switch-arm controlled by said device and serving to open and close the circuit through said relay, substantially as described.

27. The combination with amotor, of means for varying the speed of said motor, a relay controlling the circuit through said motor, a fluid-pressure device having a prearranged range of movement, and switch-contacts operated by said device at the respective-ends of its range of movement, substantially as described.

28. The combination with a motor and means for starting the same gradually, of a relay for controlling the circuit through said motor and means, and a resistance adapted to be included in circuit with said relay when the said means is removed from circuit and to be cut out when the said means is in circuit, substantially as described.

29. The combination with a motor and means for starting the same gradually, of a relay for controlling the circuit through the motor and for controlling the said means, a resistance in circuit with said relay, and means for removing said resistance when the said means is in circuit, and for inserting the same when the said means is not in circuit, substantially as described.

30. The combination with a motor, of a controller therefor, an electromagnetic winding for automatically actuating said cont-roller, a relay controlling the circuit through said n10- tor and said winding, and a fluid-pressure device for controlling the circuit through said relay.

31. The combination with a motor, of a controller therefor having a resistance adapted to be included in the circuit of said motor, an electromagnetic winding for automatically actuating said controller, a relay for controlling the circuit through said motor and said winding, a fluid-pressure device for controlling the circuit through said relay, and a second resistance arranged to be included in circuit with said relay when said first-mentioned resistance is removed from circuit, and to be cut out when said first-mentioned resistance is in circuit.

In witness whereof I have hereunto subscribed my name in the presence of two witnesses.

/ HENRY H. CUTLER.

Witnesses:

FRANK W. SMITH, T. E. BARNUM.

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