US1108439A - Motor-controller. - Google Patents

Description

Fati-med L APPLIOATIQN .FILED MAY 4 1998.

UNITED sTATEs 'PATENT oFnioE.

ALBERT J. Homoiv, or WHITE PLAINS, New vomi, As'sIGNon To TEE cUTLEn- HAMMER MFG. co., or MILWAUKEE, WIscoNsm, A concurren or wis- CONSI'N.

MOTOR-CONTROLLER.

i Spocication. uf Letters Patent.

Patented Aug. 25, 1914.

To all whom t may concern.'

Be it known that I, ALBERT J. HoRToN, a citizen of the United States, residing at lVhite Plains, in the county of `Westchester and State of New Y ork, have invented new andv useful Improvements in Motor-Controllers, of which the following is a full, clear, concise, and exact description, reference beingr had to the accompanying drawing, forming a part of this specification.

My invention relates to improvements in speed controllers for electric motors It applies lmore particularly to speed controllers that are automatically operated.

The object ot' my invention is to provide means whereby the controller may be set to canse the motor to operate at different pre-determined speeds.

Other objects of my invention will hereinafter appear.

In accordance with the preferred forni of' my invention, I provide a speed controller with means for adjusting the same to cause the motor to operate at different predetermined speeds.

The accompanying drawing illustrates one simple form of my in vention. which I have worked out in practice. Ot'l course. other forms may be developed.

The views in the aceoinpanyiimr drawings are as follows: Figure 1 is a general view of the controller, parts thereofl being shown in section. Fig. 2 is a detailed vieu of the adjusting pin. Fig. 3 is a view of thc adjusting; screw for the dash pot. i

As I have already said, in v invention may be embodied in various different forms.

, The one which is illustrated in the drawing has been selected as a simple illustration ot my invention. I shall inf-.v proceed to describe the device which is illustraucd in the accompanying drawing. it, ot course, being' understood that various changes may be made therein in practice.

The partsI of the controller are preferably mounted upon a base l. rl`he arm or switch Q. is pivoted upon a pin 3 protruding from the base l. This arni is adapted to sweep over a series oi contacts A'lconnected to an armature resistance and also a series of contacts G connected to a field resistance 7. The arm first passesl over the contacts 4, and then over the contacts 6. lhile the ariu is passing over the contacts 4 it also engages a segg-nient 8, and while it is passing over the contacts G engages a segment a. Ihe downward movement of the arm is limited by a pin 10 mounted upon the base 1. The arm 2 is operated by' ay solenoid having' a winding 11, and a movable core 1Q. The movable core is connected to the arm by means of an insulating link 13, 'which is pivoted to said arm and to the lower end of the said movable core. he solenoid winding is Wound upon an insulating spool 14,. which is mounted within a magnetic frame 15, secured to the panel 1. The winding is held in place in the frame by means of'a non-magnetic tube 16, which is insert= ed through a hole in the bottom of the frame 15, and passes upward through the windinr and ts against a shoulder in a recess in the upper part oft the frame. This tube is held in place by means of ascrew 17, threaded in the lower part of the frame, and having its head bearing against the lower end of the non-magnetici tube. The movable .core 12. slides within the non-magnetic tube. Within the upper end of the tube is an adjustable stationary core 18, which serves as a stop for limiting the upward movement of the movable core. and

which always magnetically seals with the same at the limit of `its movement. The stationary core forms part of the magnetic circuit, and, as aforesaid` serves as a stop For the movable core. The stationarycore is supported by an arm 19, pivoted upon a pin 20. The central portion of vthe arm is provided with an opening Q1 through which extends a tube 99., which 'is threaded into the stationaryv core. The upper 'end ot the tube Q2 is provided with a lange Q3, which bears upon the upper portion of the arm 19. The outer end of the arm 19 is provided with a sliding; pin 24 which is adapted to enter in one of the series of holes 25 in a curved bar 26 mounted upon the panel 1. The pin Q1 is pressed inwardly by a springl 27. It will be observed that the arm 19 may be set in different positions by inserting the pin in different holes in the bar 9.6. Ii" the position of the arm 1S) be thus changed, obviouslyT the position of the stationary core 18 will be changed, and` hence the upward limit of the movement of the movable core will be variedl The arm 19 may be, therefore, set to adjust the device so that the arm 2 will st o at any desired position. Through th stationary core 18 and the tube 22 passes a non-magnetic pinv 28, the upper end of which is provided with a head 29, that bears upon the flange 23. To a lug 30 on the arm 19 is pivoted a switch 31, the free end of which bears upon a contact 32, mountedA upon the panel 1. The purpose of this switch is to short circuit a resistance when it engages the contact 32. Then the movable core is raised by the winding, it strikes the pin 28, which in turn opens the vswitch 31,`which causes a resistance to be inserted in the circuit of the winding 11. The structure is such that this function will be accomplished irrespective of the position in which the stationary core may be set. The switch arm 2 is connected to the piston of a dash pot 33,v which is pivoted upon the base 1. The dash pot is provided with an adjusting screw 34 for adjusting the rate of travel of the dash pot. Of course, the dash pot may be of various forms. For convenience of illustratiml have illustrated the screw 34 as provided with a V-shaped slot in its side.

.For the purpose of convenience of illustration I have diagranigiatically illustrated one arrangement of circuits that may be used with the controller. Of Course, various circuit arrangements may be employed. I shall now proceed to describe the operation of the controller. Assume that the arm 19 is set in the position shown. If the main line switch 35 be closed, current will iow from the positive -linc through conductor-36, through switch arm 2, resistance 5, conductor 37, motor armature A, conductor 3S, to the negative line. Current will also iiow from the switch arm 2 to contact segment S, thence through conductor 39, and field F of the motor to the negative line. The closure ot the main circuit will also close the circuit through the solenoid, which circuit extends from the conductor 36, through conductor 10, winding 11, conductor 4-1, conductor 42, arm 19, switch 31, contact 32, conductor 43 and conductor Llto the negative line. The solenoid will raise the movable core 12, thereby moving the switch arm 2 upward, and removing resistance 5 from the armature circuit. When the movable core strikes the stationary core, the switch arm 2 will stop. lith the arm 19 in the position shown in the drawing, only part of the armature resistance will be cut out, and hence the motor will be operated at a slow speed. The core 12 will operate the pin 2S as it approaches the stationary core, which pin will open switch 31. The resistance 45 will then be inserted in the circuit of the winding` 11, and this circuit will extend through the conductor 40, winding l1, conductor 41, conn ductor 4G. resistance 45 and conductor 44 to the ne ative line. If it be desired to set the contro ler for the motor to operate at a higherV speed, the arm 19 may be raised so as to raise the stationary plunger. rl`hen the movable core will be permitted to rise higher and draw the switch arm 2 over more of the contacts 5. The arm 19 may be set so high as .to permit the switch arm to pass first over -the contacts at and then over the contacts G, in which event, after the armature resistance 5 has been removed from circuit, the switch arm will insert the resistance 7 in the ield circuit, as it passes over the contacts G, thereby raising the speed of the motor to its highest degree. It will be observed that I have pro-vided an automatic speed controller which may be set to limit the operation of the motor to any desired predetermined speed. I

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

1. The combination with a solenoid operated speed regulator, of means associated therewith to limit the movement of said regulator at will to obtain any.' one of a number of different predetermined speeds oi the motor, the operating solenoid having a -inovable .plunger arranged Ato always magnetically seal when the regulator reaches the limit of its movement.

2. The combination with a speed controller for electric motors, oi an operating solenoid having a relatively stationary core,

and a movable core connected to said connectcd to said controlling member, a sta` tionary core within said winding, one of said coresbeing adjustable relative to the other for limiting the range of movement of said controlling,r membciyto cause the motor to operate at different predetermined speeds.

Ja In combination, a speed controlling rheostat, a solenoid having a stationary core and a movable plunger. said movable plunger being connected to the movable element of said rheostat, said stationary core being arranged to serve as a stop ior said movable plunger, means for setting said stationary core at different positions to vary the range of movement of the movable element of said rheostat.

The combination with an electromagnetically operatedspeed controller, of means for adjusting the same at` will to canse the motor to operate at a predetermined speed,

and autonnltitarlly operated means for reducing the lionY of current through the operating magnet after the controller has been operated.

G. In a controller tor regulating the speed of elect ie motors, the combination witha controlling` member, of an electromagnetic winding, a movable core with in said winding and connected with said controlling member, a st tionary core within said Winding serv- `ingas a stop for Saidy movable core, o ne of said core-s beingadjustable relative to the other to limit the movement of Said con,- trolling member, and meaneA for reducing the non' of current through Said winding when said controlling` member has reached the limit of its travel,

7. In combination, a speed controlling rheostat, a solenoid having a stationary core and a movable core, said movable core being connected to the movable element of said rheostat, said stationary core being arranged to serve as a stop for said movable core, means for setting the Stationary core at dijferent positions to vary the range of movement of the movable element of said rheostat, and means for reducing the How of current through said solenoid after said rhcostat has been operated irrespective of the position ot said Stationary core.

S. ln a controller 'for regulating the Spoed of electric motors, the combination with a controlling member, of a solenoid having a movable plunger connected with said conw trolling member, and a stationary plug serving as a stop for said movable plunger, a switch adapted to be operated by said plunger upon reaching.r ita final position, a re sistance for said solenoid controlled by said switch, and moans for adjusting the position of said plug and said switch to cause the motor to operate at diilerent predetermined speeds.

f). In a yepeed controller for electric motors, the combination with a. controlling member. a solenoid havinga movable core connected with said controlling member, and an adjustable plug tor limiting the movement ot said movable core, a lever supporting said adjustable plug, means -lor locking said lever in di'llerent. positions, a switch carried by said lever. a resistance for said solenoid controlled by Said switch, and means actuated by said core upon reaching its final position for opening said switch.

l0. Vln a speedcontroller for electric motors. in eonibimition` a resistancin a controllingv i'nen'iber therefor. a solenoid having a relatively stationary core and a movable core connected to said ctmtrollingmember for operating` the same. and means including! saitl relatively stationary core for limiting the movement oft said controlling mem# ber and va rying the range ot movement thereof at will to cause the motor to be automatically brought u to any one of a number of dilterent nedetermined speeds, said movable core an said stationary core being adapted to always magnetically seal when said controlling member reacties the limit of its movement.

ll. ln a Speed controller for electric motors, in combination. an 'armature resistance a field resistance. a single. movable member for controlling both oi said resistances, a solenoid for operating saidcontrolling member, said solenoid having a vrelatively stationary core and a movable :ore connected to Said controlling member, and means including said relatively stationary core for limiting` the movement of said movable core electromagnet, a movable core and a St(- tionary core mounted therein, said movable core being connected to said `controlling member. aid stationary core being arranged to limit' the movement -of said' movable core,

and means For adjusting one of said cores relative. to the other `for varying the range of movement ot said controlling member.

13. The combination with a speed controller tor electric motors of an operating solenoid having a relatively stationary core and a movable core connected to said controller. means includingT said relatively stationary core for limiting the movement of said controller and varying:y the range oi movement thereof. said movable core al ways abuttingl against said stationary core upon energization of said solenoid, and means t'or autonnlticallrT reducing the How of current through said solenoid upon said movable core reaching the limit' of its movement.

1,4. ln a speed controller tor electric motors` in combination. a resistance. a controlling element therefor, an operating Winding having a relatively stationary core, and a movable core connected to said controlling element. means including said relatively Stationary core `for limiting the mo'vei ment ot said movable .core and varying the range ot movement thereof at nill to cause said resistance to be varied to obtain any one of a' number of differenty predetermined v l speeds ot the. motor upon energization of,

said winding, and a switch adapted to be operated upon said controlling element reaching anv predetermined final position, to insert resistance in circuitwith said Winding` to reduce the flow of current therethrough.

151 In a speed contoller for electric motors, the combin'iition, with n controlling member, of a/ solenoid Windinghzrzingiu movable Cyr/e connecteclffwith"said Q'ontroli lnodffieinber, an adjustable plug Within said Wgizding for limiting the movement of said movable core, and an adjustable lever supporting said plug and adapted to be locked indifferent positions to cause said plug to stop said plunger in any one of a number of different positions io cause themotor to operate at different predetermined speeds.

Inu/Witness whereof, I have hereunto subscribed my name in the presence of two Wtnesse's.

ALBERT J. HORTON.

fitnessesz W. C. MARGERSON, BEATRICE MIRVIS.

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