US850872A - Motor-controller. - Google Patents

Description

0.872- I PAT-ENTED APR. 16, 1907. A. PEDERSEN.

MOTOR GONTROLLER.

APPLIUATIOH FILED 0.16, 1906.

UNITED STATES PATENT OFFICE.

ADOLPH PEDER'SEN, OF CLEVELAND, onto; ASSIGNOR TO THE VAN nonu- ELLIOTT ELECTRIC COMPANY. OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

moron-coarseness- Specification of Letters Patent.

Patented April s, 1907.

Orlglnel lpplicafiori'flled 8eptember1i!,1904, Serial a. 221,053. mammal-imam August is. 1905. Serial In. 214.398.

. To all whom it may concern Be it known that I, ADoLPn Pnnnnsnu, a

I citizen of the United States, and a resident of Pin the claims.

Cleveland, county of Cuyahoga, and State of Ohio, have invented a new and useful 1111-.

provement in Motor-Controllers, of which the following is a specification, ,the principle of the inventionbein herein explained and thc'best mode in whic I have contemplated applying that principle, so as to distinguish it om other inventions.

My invention relates to :mechanism for controlling the operation of electric motors.

Reference need scarcely bej'made to the fact that one of the chief difficulties in using an electric motor where a variable load is en- The annexed drawings the following description set forth indetail certain mechanism embodying the invention, such dis closed means constitut'- but one of various mechanical forms in winch the principle of the invention may be used. V In said annexed drawings, Figure Impresents a planiyiew of my improved motorcontroller in its casing. LFig. 2 represents a horizontal cross-section of the same as cut by a plane passing through line 2 2, Fig.4. Fig. 3 represents a vertical cross-section thereof as cut by a plane passing through line, 3 3,

' 4'; and F g. 4 represents a vertical cross- 1 .'pr9vementin.elect1icallycpem' 5 f 19,04; However,-

section thereof as cut by a plane passing through'iine 4 4, 1.8111112.

' sub'cct-matternf application has. been out-ofm'y rior application for: United- '-;Letters item; for an im-, ted portable eswiia filed September 19-, m1 m o ro l Ihwsh ne pmwularlr designates the casing 'tion of the controller to is attached to casi suited for use on electricallym' ted portable drills because of its aim Katy and lightness is equally well adapted or use in numerone other situations where it is desired to provide a small, compact, and cfiicient controlling mec i In the form of my improved motor-controller shown in the accompan wings, A

within which the controller is contained, and B a handle rotatably attached thereto. In thelparticular applicae situation above referred tocasing A would either fonn a part of or be attached to the motor-casing M, Figs. 3- and 4, and handle B would referahly be one of the handles whereby t drill IS manipulated. The inca'sed controller, as shown in the figures just referred to, is secured to the motor-cas' substantially directly over one of the po e-pieces P of the motor-field. Themanlxar in which handle B a P8813 Ill The inner end of the p ameter to fitin the bore of a boss A, pro ectfrom the casing A, and the portiono the handle extending within the is still further reduced, so that an'oflset b is armed,

ggxlich 0131 8101118 aformed witgn the bone see an is against' sin ledge" b means ofkeys b, fitted in boss A",'so as ti) register inn groove bfencircling handle B.

Secured to handle B, so as to fitover and cover boss A, is a sleeve B, provided with a bottom flange b, which has formed in its peripheriy anotch b, Fig. 1., out upon the are of a circ e. Adjacent to this sleeve B is the knob G of switch C", 2, d to revelsethe current through the motor which it is desired to control. Knob C is rovided F 4. ndle 1s of reducdg di' with a circular bottom flange c, which has a etc is thus formed, y means of which it is evi ant that the operation of the rave switch C is prevented except when handle occupies a certain position, such than being etennined by the location 0 notch b on flange b'.' The object of thhu'rangement' will appear in whatfollows.

.MrmntedonflmendofthehandleBwhich disks from each other. Disk to contact with one, two, up to all of a series As has been state of contacts k, mounted upon an insulatin block K and permanently connected wit each other through suitable resistances (not shown) interposed one between each pair of contacts except the first, to whic L of the motor-circuit is connecte "As will be readily understood, the. vcircuit connections are such that by rotating disk E with contact member E the circuit is first closed, when the first two of contacts is are joined, and the resistances are then successively out out, so that when such member line wir is m contact withall of contacts k the full current is allowed to ass through the motor. (i disk E is rotatable upon handle B,and it, normally held in its off position+'i. e'.', sqtharlrthe circuit is brokenbymeans of a coil-spring E which encircles washer wand is attached at one end to casing Aandat: the other to such disk E. Rotationof disk E from such normal position, so as to connect the circuit and successively cut out the interposed resistances, iseflected by rotation of disk D, which is connected with disk E by means of a form of'catd'i.v This catch comprises a flat spring (I, Fi L2 and 4, attachedto the under side of dis D, and bears on its free enda pin (1', which projects up through an apertured far. enough to engage an aperture e in disk -E when the two disks occupy the proper relative positions. Thus by turning the handle B and disk D attached thereto until pin (1- is brought into register with aperture e indisk E such last-named disk becomes also ,rotatively attached to handle B and can be rotated to turn on the current as desired.

Passscrewed into the pole-piece P, adjacent to the controller, soas to have itsupper end. lpath oftravel of l 1n roximity to the sp rin dais disk D is rotate is an iron member Such construction, it will be observed, will render this member P m etic when pole-piece 'P- is magnetized of current throu h the motor-fiel y locating member I sothat in d'. will be di- ,rectl above-it when the dis E has been rotate thereby to its -onfpositionitis evis dent that -u n-the attractionjof magnetic member? ecomin'g sufficiently strong pin in such disk:

through the motor-casing M and b the llow ger the motor, the member- P xufiion' such "conditions being for use in d will be drawn released and, under the influence of spring E, be returned to its ofl position. This 'will occur whenever the magnetic flux ofthe motor reaches a certain predetermined amount gaged by the flexibility of spring d.

The mechanism. of m 1m roved motorcontroller having been t us described in detail, it only remains to indicate its mode of operation. Normally the disk E is in the off position. To turn the current on, handle B. and thereby disk D, must be rotated until pin (1 engages aperture e, whereupon disk E also becomes connected with handle B, so as to rotate therewith, and can accordingly be turned to connect the circuit'and to successively cut out the resistances placed between contacts 7c until the full current is flowing through the motor. By turning-the handle in the opposite direction one or more of such resistances can be replaced in the circuit. To reverse the current, the handle has to be turned back until the circuit is broken before the notch bin flange b will be positionedto permit therotation of knob C of reversingswitch 0. Such 're'versin switch is securely locked-from turning-atal other positions of the handle B.- v

' .If, while the current is on for any reason such current becomes so strong as to endansimultaneously becomes sufiic'iently magnetized to attract toward and disk E be thus pin d to itself, and thus automatically turn the current; off in the manner already .set

forth; It is thus seen that with my controller in use a workman cannot reverse the cur rent through the motor without first turning the current off. Neither can he continue using the motor underv conditions that render 'itliable to be burnt out, for immediately approxnate'd e currentis automatically turned 0 At the same time the current is capable of manualcontrol as well so long as suchibounds of safety are not overstepped." The simplicity of the device and thefp'rotectionof its parts from any interference adapt .my controller erative.

I I wish particularly to point out that Ihave provided 9. ve convenient arrangement whereb. one ,of the handlesyutilizedfor moving an the drill or other machine is also utilized for operating the controller, al-

' though obviously separate handles might be used for these two oses that the operative can in no. way

the mainarmature circuit, have been utilized of the motor-field.

plish ux or force the machine. *tothe work over and above its adjusted ca-- pacity, and'that whereas heretofore separate andindependent means; such as a solenoid in 1 the hands of an nexperienced opler comprising a movable contact member,

and manually-o erable means adapted -'to move said mem er and controlled by the magnetic, flux of such motor. I

3 The combination with an -electric circuit and a motor therein; of a cut-out switch comprising a movable contact member;

means adapted to retain the same normally in a predetermined position; and means adapted to move said member to and retain the same in any other desired position, said latter means being controlled bythe magnetic flux of such motor and adapted to have its operative and. inoperative conditions changed from one to t e other only when such flux reaches a predetermined maximum.

4. The combination of an electric circuit and a motor therein a cut-out switch comprising a movable contact member; means ada ted to retain the latter normally in its oi position; and means'adapted to move k trolled quantity;

said member to and retain thesame in any other position, said latter means controller by the magnetic flux of such motor, and adapted to bechanged from an operative to an inoperative condition only when such flux reaches a redetermined maximum. 5. The com ination-with an electric circuit and a motor therein; of a motor-controller comprising a movable contact member, means adapted to retain thejsame normally in a predetermined position, and manuallyoperable means adapted to move said member to and retain the same in any other de' sired osition', said latter means being con by the magnetic flux of such motor.

6. The combination with an electric circuit and a motor therein; of a motor-controller comprising a movable contact member, means adapted to retain the same normally in a predetermined position, and manually- 'operable means adapted to move said member to other positions, said latter means be-- ingrendered inoperative when the magnetic fluxof such motor reaches a predetermined 7. The cuit and a motor therein; of a motor-controller corpprising a'movable contact member adapts to normally occupy its "0 position, a manually-operable member adapted to move said contact member to it's on position, and retain said member in said 0- sition, said manually-operable member being combination with an electric cirrendered ino rative to retain said contact member in said on position when the magnetic flux of such motor reaches a predetermined quantity.

8: The combination with an electric circuit and a motor therein; of a motor-controller comprising a manually-operable member, a movable contact member, and means adapted to operatively. connect said two members and controlled by the magnetic flux of such motor.

9. The combination with an electric circuit and a motor therein; of a motor-controller comprising a manually-operable member, a movable contact member, means for bolding the latter normally in its olf" position, and means adapted to operatively connect said two members and actuated to disengage when the magnetic flux of such motor reaches a predetermined quantity.

' 10. The combination with an electric circuit and a motor therein, of a motor-controller com rising a movable handle, a member fixed t ereto, a movable contact member adapted to normally occupy its oil' )Sltion, and means ada ted to connect sait two members and contro ed by the magnetic [but of such motor.

11. The combination with an electric cir-- cuit, and a motor therein; of a motor-controller comprising a manually-operable member, a movable contact member adapted to normally occupy its off position, and means adapted to connect said two members whereby said contact member may be moved to other positions, said means being controlled by the magnetic flux of such motor.

5 r 12. The combination with an electric cirand a motor therein; of a'motor-controller comprising a movable handle, a member fixed to said handle, a contact member movable on said handle, means tending to retain said contact member inits o position, and means automatically operated to connect said contact member with said first named member, whereby said contact member may be moved to its on position, said latter means being electrically'controlled.

13. The combination ofan electric circuit and a motor therein; a motor-controller comprising a movable contact member; means ada o position; and other means automatira ally operated to e c with said member, said latter means being manually operable to move said member to any other desired position and retain the same therein, said former means being rendered operative and said latter means inoperative only under the condition of an ove oad in the circuit.

14. The combination with an electric circuit and a motor therein; of a motor-control ler com rising a mannallEe-operable member, a mova lo contact mcm r, and means car+ ried by and movable with said'manually-opted to retain the same normally in its manu member, both 'of said a IIIOVIL 4o ler com a mova le-contact member, means adapted, retain said-contact member ma.'

erable-member, and adapted to be automat-' ically operated to connect the latterwith said contact member, said means op erativel controlled independently of said operable member. 15. T e combination with an electric'circuit and a motor therein; of a motor-controller com a manuall -operable member a mova le contact mem 1', means adapte 10 to nonnally retain the latter in a redetermined posit on, and meanscarrie byand movable with said manually-operable member, and adapted to be automatically operated to. connect the latterwith said contact means opera tively controlled independently of said manually-operable member.-

16. The combination with an electric cir cult and a motor therein; of amotor-controL. 2o ler com rising a manualllyesoperable member,

a move le contact mem r, and means carried by and movable with said manually-ops 'erable member, and adapted to be automatically operated to connect the latter with said 25 contact member, said means being electric-- ally controlled.-

' 17. The combination with an eIectric c'iI- lercomgrising a manually-operable member, le contact member, -means to normally retain the latter in a mined position, and means carrie movable with said manually-operable mem cuit and a motor therein; of a motorcontrol redeterher, and adapted to be automatically oper- 3 5 ated to connect the latter with said contact member, said latter means electrically controlled. f 18. The combination with an electric circuit and a motor therein of a motor-controla manually-operable member,

to normally predetermined position, and means carried y and movable with saidmanually-operable' member, and adapted-to be automatically operated to connect the latter with said con tact member whereby the latter may be moved to other positions, said operative connection' broken to allow said first-men- 5o tioned means-to become operative when a predetermined electrical condition is attained.

19. The combination with an electric circuit and a motor therein; of a motor-controller comprising a manually-operable. member,

a movable contact member, and movable means adapted to be automatically operated, under the condition of no load in the circuit,

to connect said two members, and adapted to retain said connection exceptunder the condition of an overload in the circuit, whereby said contact member maybe moved in either direction, and retained in any desired position, said means in'g adapted to be elecadapted by and whereby said contact member may be moved 7 5 to-and retained in its on position, said means being adapted to be electrically operated to break such connection between saidtwo members.

21. The-combination with an electric cir- 8o cult and a'motor therein of a motor-controller com rising a manuall -operable member, a movable contact mem er adapted to normally occupy. itsoff position, and mechanicall- -operated means adaptedto be au- 8 5 tomatica 1y 0 erated, when said contact member is in its off position, to connect saidtwo members, whereby saitl contact member may be moved toand retained in its on position,

under the condition of an=overload in the cir-' cuit, to be electrically operated to break suchconnection between said two-members. I '22.- The-combination with an electric circuit and a motor therein, of a motor-control- 5 ler comprising a movable handle, a member fixed to said handle, a contact member movable on said handle, means adapted tobe-mechanically o erated to connect said two members an break such connection.

' 23. The combination with an electric cit-- cuit and amotor therein, of a motor-control-l fler comprising a movable handle, a member fixed to said handle, a contact member mov- 105 ablev onsaid handle, means tending to holdsaid contact member in-its ofi osition andmeans adapted to be mechanica 1y 0 erated to connect said two members where y said contact member may be moved to its -on no position, and to: be electrically operated to reak such connection.

24. The combination with an electric circuit and a motor therein, of a motor-controller comprising a manually-operable member, 1 15 a move lecontac t member adapted to open and; close said-circuit and to output aresistance therein, means ad apted to normally retain said contact member in a predetermined position, and means, controlled 1:17 the mags r 20 netic flux of said motor, mounte upon said first member and adapted to operativel nect said contact member with sai member.

confirst 25; The combination with an electriccir- I2 5 cuit and 'a' motor therein, of a.motor-contr0l-' ler comgrising. a manuallv-operablemember,- a mova le contact member-adaptedto open perated' to break the connection beor adapted to norsaid -means being adapted,

to be electrically operated to rooand close said circuit and to cut out a resistance therein, means adapted to normally retain said contact member in a predetermined position, and means, mounted on said first '5 member, adapted normally to engage said contact member, whereby said contact member is operatively connected with said lirst member, and to be actuated to disengage said contact member when the magnetic flux of 1 said motor reaches a predetermined quantity.

26. The combination with an electric circuit and a motor therein, of a motor-controller comprising a movable handle, a member fixed to such handle,-a contact member-mow r 5 able on said handle, a spring adapted to normally retain said contact member in its oli position, and a catch on said first-named member adapted normally to engage said contact member and to be disengaged therefrom when the magnetic flux of such motor reaches a predetermined quantity.

27. The combination with an electric circ'uit and a motor therein, of a motor-controller comprising a movable handle, a member fixed to such handle, a contact member movable on said handle, a spring adapted to normally retain said contact member in its off position, a catch on said first-named member adapted normally to engage said contact member, and a magnetizab e member connected with a pole-piece of such motor and adapted when the magnetic flux in such polepiece reaches a predetermined quantity to disengage said catch from said contact. mem- 3 5 ber.

28. The combination with an electric cir cuit and a motor therein; of a motorcontrol-- ler comprising a manually-operable member, a movable contact member adapted to open and close said circuit and to cut out resistance therein, means adapted to normally retain said contact member in a predetermined position, and means automatically 0 erated to connect said two members, sai latter means being electrically controlled to be-rendered ino erative only under the condition of an over oad in the circuit.

29. The combination with an electric circuit and a motor therein; of a motor-controller com rising a manually-operable member, a move )le contact member adapted to open and close said circuit and to cut out resistance therein, means adapted to normally retain said contact member in a redetermined position, and means mounte on said first member and adapted to be automatically operated to connect the latter with said contact member, said latter means being electrically controlled to be rendered inoperative only under the dondition of an overload in the circuit.

30. The combination with an electric circuit and a motor therein; of a motor-controller comprising a movable handle, a member fixed to said handle, a contact member movable on said handle, means tending to retain said contact member in its off position, means automatically operated to connect said contact member with said. first-named member, said latter means being electrically 7o controlled to be rendered inoperative only under the condition of an overload in the circuit, and a reversing-switch interlocked with said handle so as to be operable only when thelatter is in its off position.

31. The combination with an electric circuit and a motor therein; of a controller member therefor, a retractile spring adapted to throw said member into its off position, a handle, and means for connecting the latter and said member, said connecting means renderin said spring inoperative, a predetermined quantity of flux in such motor rendering said connecting means inoperative and said spring operative. I 5

32. The combination with an electric circuit and a motor therein; of a controller member therefor, a movable handle, a member fixed to the latter, a spring-actuated lockin -piece secured to said fixed member and adapted to engage said controller member, and a retractile spring connected to the latter and adapted to actuate the same to assume its of position when said lockingpiece is disengaged therefrom, the actuation of said locking-piece being controlled by the magnetic flux of the motor.

33. The combination with an electric circuit and a motor therein; of a movable controller member therefor, a handle,'a springactuated catch carried by the latter and ada ted to engage andv disengage said control er member, a retractile spring arranged to throw the latter into its off position when said catch is disengaged, and a magne- 5 tizable member connected with a ole-piece of the motor-field,.said catch being ocated in the ma etic field of said magnetizable member an iorming an armature for the latter.

34. In devices of the general character described, the combination of a motor provided with a suitable casing; a ,controller comprising a .movable contact member, manuallyoperable means adapted to move the latter off and on as desired, said latter means 5 being inoperative only under the condition of an overload in the circuit, and means adapted to throw said contact member auto.- maticall to its off position under such overloa and a casing for said controller I20 mounted upon said motor-casing.

35. In devices of the general character described, the combination of a motor provided with a suitable casing; a controller-casing mounted upon said motor-casing; a movable I 5 handle for holding and guiding the tool; a

contact member within the latter normally operatively connected to said handle; and connecting means within said controller-casing for said handle and contact member I3 adapted to be actuated to release independently of the handle operation; and automatic means for throwing said contact member, when so released, to its off position, said contact member, when so released, being incapable of any manual operation or of any.

interferencewith its movement to its off position.

36. In devices of the general character de-.

scribed, the combination of a motor provided with a suitable casing; a controller-casing mounted upon said motor-casing; a movable handle for holding and guiding the tool exsaid contact member, when so released, to its off position, said contact member, when so released, being incapable of any manual operation or of any interference with its movement to its oil' position.

37. In devices of the general character described, the combination of amotor provided with a suitable casing; a controller-frame mounted upon said motor-casing substantially directly over a pole-piece of the motorfield; and a movable contact member mounted upon said controller-frame and controlled by the magnetic flux of the motor-field.

38. In devices of the general character described, the combination of a motor provided with a suitable casing; a controller-casing mounted upon said motor-casing substantially directly over a pole-piece of the motorfield; a movable handle for holding and guiding the tool extendingexteriorly from within said controller-casing; a contact member within the latter; means tending to hold said contact member in its off" position; and means normally operatively connecting said handle and said contact member, a predetermined quantity of magnetic flux in the motor-field actuating said latter means to disengage said contact member.

39. The combination with an electric circuit and a motor therein; of means for automatically breaking said circuit when the magnetic flux of the motor reaches a predetermined quantity.

40. The combination of an electric circuit and a motor therein; means for automatically breaking said circuit when the magnetic flux of the motor reaches a predetermined quantity," and manually-operable means for closing the break in said circuit made by said antomatically-operating means.

Signed. by me this 3d day of August, 1905.

ADOLPH PEDERSEN.

Attest: v

JNO. F. ()BERLIN, G. W. SAYWELL.

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