US983976A - Motor-controlling device. - Google Patents

Description

G. E. CARPENTER.

MOTOR CONTROLLING DEVIGE.

APPLICATION FILED MAY 9, 1907.

2 8KEETSBHEET 1.

ATTORNEY',

Patented Feb. 14, 1911.

Ti mi N. w M,

G. E. CARPENTER. MOTOR UONTRULLING DEVICE. APPLIOATION rum) MAY 9. 1907.

Patented Feb. 14, 1911.

2 SHEETS-$313111 2.

5, I 2wwz WW1 M71991 ATTORNEY CHARLES E.

UNITED STATES agans? OFFICE.

canrnn'r'nn, on NEW Yank, N. Y., as'sronota 'ro cnT E'a-irniflmk. MFG. 00., or MILWAUKEE, Wisconsin, A ooarona'riolv or WISCONSIN.

ammomsomm DEVICE.

Specification 0! Letters Patent.

Application filed May 9, 1907. Serial No. 372,739.

Tatent'ed Feb. 14, "1911.

T 0 all whom it may concern:

Be it known that I. CHARLES E. CARPEN- i'nu, a citizen of the UnitedStates,:residing at New York, in the county of New York and State of New. York, have invented new and useful Improvements in Motor- Controlling Devices, of which the following is a full, clear, concise, ande'xact description,

reference being had to the accompanying a part of this specificathe switch can not be partially opened and maintained at this point, causing a continned and destructive are at the switch contacts.

For the purpose of illustrating my invention I have shown one embodiment thereof in the accompanyingdrawings,

In said drawings: Figure 1 is a front elevation of my motor controlling device. Fig. 2 a detail section showing the manner of mounting one of the switch members. Fig. 3 is a rear view of the magnets. Fig- 4 is a section onthe line 4-4 of Fig. 3, and Fig. 5

is a diagrammatic view of the circuit arrangement of the embodiment of my invention illustrated.

In the preferred embodiment-ofmy inven-' tion I provide a suitable casing 2,'which may be formed of iron or any other indestructible material, for inclosing the various parts of the controller, provided with a removable cover (not shown) to permit access to the in- .terlor thereof.

Suitable securing lugs 3 are provided at the top of the casing by which the same may be supported in position. The

lower end of 'the casing is provided with an opening through which extends a removable bushing 4, having an opening therein to accommodate the operating rod of the controller.

Mounted within the casing is a suitable panel or base 5,"which may be formed of slate, soapstone or like insulating material, and upon which the various operating parts of the controller are mounted. This base 'or. panel may be secured in position within the casing 2 by means of screws or bolts 6. The front face of the base or panel is provided with a plurality of pairs of contacts, 7, 8, 9, and 10. The pairs of contacts are arranged to be bridged by switch members 1.1, 12, and 13 which may take the form of metallic disks suitably'mounted upon and insulated from a vertically extending rod 14, which passes through the bushing 4, and at.

its lower end is connected with an operating pedal 15 of a sewing machine or the like.

The disks 11', 12 and 13 are loosely mounted upon the rod 14 and insulated therefrom by suitable insulating bushings 16. The disk 13 is formed of iron and is resiliently supported .in position upon the rod '14, upon a brass sleeve '17, and rests upon a-coiled spring 18 interposed between the bottom of the disk anda flange on the sleeve. The

coiled spring 19 bears against the top of the sleeve and 'a collar 20, secured upon the rod. The disk 12 rests upon the collar 20, and has interposed bet-ween it and a sleeve for the disk 11 similar to the sleeve 17,"'a coiled spring 21, whereby the disk is 'held in normal position. The disk 11 is mounted upon a sleeve and has a coiled spring 22 interposed between it and a flange on the top of the sleeve. A stop collar 23 -prevents thesleeve of the disk 11 from coming off therod. The. disposition of the disks upon the rod with respect to their contacts is such that \vhen the rod is moved downward the disk 13 will be the first 'to engage its contacts, The disk 12 will next. bridge the pair of contacts 9 and the disk 11-, which normally bridges the pair of contacts will lastly bridge its pair of contacts 8. When the rod 14 is raised, the order of opening of the switches will be inverse to their order of closing. Viz: the switch ;member 11 will open first, then th switch member 12 and lastly the switch member 13. This action is obtained by making the normal distance between the pair of contacts 8 andthe disk 11 greater than the normal distance between the pair of contacts 9 and the disk 12, which distance is reater than the distance between the pair 0 contacts 10 and the disk 13. The rod 14 is raised to normal position by a coiled spring 24 interposed between a. shoulder on the rod and a shoulder formed in the bushing 4.

The pair of contacts 10' are mounted upon projecting poles 25 and 26 of a pair of magnets mounted upon the rear of thepanel or base 2, suitable openings in the panel being provided to accommodate the poles 25 and 26 of the magnets. The poles are provided with windings 27 and 28, respectively, also mounted upon the rear of the base or panel 2. The opposite pole pieces 29 of the wlnd- 28 are preferably triangular in.

ings 27 and I shape with the bases of the triangle ad1acent and an air gap is formed between the pole pieces at the base of the triangles, electrically insulates the pole pieces but due to thesize of the pole pieces at this point,-

the resistance in the magnetic circuit caused-v fluence of the spring 24: moves the shoulder thereof into engagement with the bottom of "the sleeve 17 and kicks the disk 13 loose, when it will fly tip-under the action of thespring 18 to openthe circuit- This prevents holding the disk near the contacts-10- which would cause a continued are at this oint; The baseor panelQ is provided with suitable binding posts 30, 31, 3'2- and 33 by whichithe proper electrical connections may be made with the'motor andwith the supply mains; 1

The'ci-rcuit arrangement of the control-- ling device is more particularly shown the diagrammatic" view illustrated in F1g,--5.

As illustrated in this figure the binding post I 32 is connected by-the conductor 34; with the positive side 35 of the supply mains and thebiuding post 30 is connected by conductor 36 with the negative side 37- of the supply mains. One terminalof the armature 38 of the motor is connected by conductor 39 with the binding .post 31,-the opposite terminal thereof being connected by the conductor 40 with the conductor 36. ()ne terminalot the series field winding 41 of the motor-1s connected by conductor 12 with the binding post 33. the opposite terminal or said winding being connected with the supply main The shunt field winding 43 of the motor is connected between the positive side 35 of the supply main and the conductor36. One of the pair of contacts 7 is connected by conductor 4:4: with the binding post 30, while the opposite contact of this pair is connected by a conductor 45 with one terminal .of the winding 27. The binding post 31 is also connected by a-short. conductor 16 with the conductor 45, and with one of the pair of contacts 8. The opposite of the pair of contacts 8 is connected by conductor 47 with the binding post 32. One of the pair of con-- This tacts Dis connected with one terminal of the winding 27 while the other is connected by conductor 48, with one terminal of the armature resistance 49 and by-a short conductor 50, with the binding post 33. The opposite terminal of the armature resistance 49 is connected with one terminal of the winding 28 and one of the pair of contacts 10 is connected with the opposite terminal of the winding 28, while the opposite of the pair of contacts 10 is connected with one terminal of the winding 27.

Inoperation the r0d'14 is moved amen 'wardly, thereby moving with each of the dislrsi11, 12 and 13. The distance between the disk 13 andits pair ofcontacts 10 beingthe shortest, this disk. will bridge its contacts first and close the circuitfrom the positive side 35 of the line, through the seriesfield 41, by conductors 4Q, 50, and 48,

through the resistance 49, through the ivinding 28, across the disk 13, through the winding27, by conductors 15, 16 and39, through the armature and by conductor 40, to the negative side 37 of cthe line. The 'motoris thus started with the resistance in circuit,

A continued downward movement of the rod 14 causes the disk 12110 bridge the contacts contact 13 hasbeen closed.

49 and increases thespeed of the motonv A still furthendownward movement of the rod 1 1 will. move the disk 11 into engagement with the pair of contacts 8 thereby short circuiting the series field winding andthe motor will run at full speed. In stopping the motor .the rod 14 is permitteclto rise.

thereby first opening the switch 11, then the switch 12. A further upward .movement of the rod will not immediately open the switch 13 as the magnetic attraction ofthe pole pieces :25 and 26 will hold. the disle until the springlS has been compressed and the shoulder on the rod 14 kicks the disk open, when it will be snapped updthereby preventing the running of the motor on an are formed between the disk 13 and its contacts 10. When the switches reach their final or normal position, the switch 11 will bridge the contacts 7. closing a circuit across the terminals of the armature 38, and cansing the motor to stop quickly on accountof the dynamic brake action. I g

It is obvious that instead of the switch 11 being arranged to short circuit the series field winding, it can be arranged to control an additional section of armature resistanr if so desired. 1

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

- 1. In an electric SWllLClL in combination,

rigid stationary contacts, a movable. meln- 9, the coiled spring 19 permittingthis down-' -ward movement of said rod even though the I I The bridging of the contacts Qshortcircuits the resistance her, a rigid contact loosely mounted on said member and adapted to be moved thereby to bridge said stationary contacts, electro resp'onsive means for magnetically holding said contacts in engagement. and means adapted to haveenergy stored therein upon movement of said movablemember, to overcome the magnetic pull upon. said brid ing 3. In a switch, the combination with a movable "member, of a pan" of stationary cont-acts adapted to be engaged by said member and forn'iing the pole pieces of an electromagnet, and means adapted to have. energy stored therein for opening said switch, said contacts being adapted to'hold the switch closed until the energy is stored in said opening means.

4. In a switch, the combination with a inovable member, of stationary contacts adapted to be engaged thereby, said contacts forming the pole pieces of an electro-magnet and said switch forming the armature of said magnet and a spring adapted, when,

placed under tension. for. opening said switch, said contacts being adapted to mamtain the switch closed until the spring is placedunder tension.

5. The combination with a movable member, of a switch member movably mounted thereon, a coiled spring resili'ently supporting said switch member on said movable member andxadapted, when placed under tension by said movable member, to open said switch member, and an electro-magnet forholding said. switch member closed; until said coiled spring is placed under tension.

6. The combination with a movable rod, of a switch member movably mounted upon said rod, a pair of contacts adapted to be bridged by said switch member t1 I1(l f0lIl'l1llg pole pieces of an electro-magnet, saldiswitch member being adapted to form the armature thereof, and a coiled spring adapted, when placed under tension, to open said switchmember, said contacts being adapted to retain said switch member-in a closed position until the coiled spring has been placed under tension by said movable rod.

7. In a switch, the combination wvith a plurality of switch members, of means for successively operating said members, means adapted to have energy stored therein for opening one of said members at a predetermined time and an electro responsive device for retaining said switch closed until energy is stored in said opening means.

8. In a switch,- the combination with a plurality of switch members, of means for successively operating the same, a plurality of stationary contacts arranged to be engaged by said switches, the contact of one of said switches forming a pole piece of anelec tro magnet, and means adapted to have energy stored thereln, for opening sa1d switch, said energized contact being adapted to hold saidswitch closed until the energy is stored in said means. i

9. The combinationwith a movable mem ber, of a plurality of resiliently mounted switch members carried thereby and adapted to be s ficcessivelyoperated by said movable member, a spring adapted to be placed under tension for opening one of said switches and an electromagnetic means for retaining said switch closed until said spring is placed under tension. I r

10. In a switch, the combination with a mOVH-blGIYIBIHbQI'M of a plurality of switch members carried thereby andadapted to be successively operated by said member to bridge a plurality of pairs of contacts. one

pair of said contacts forming the pole pieces of an 'elect-ro-magnet, and a spring adapted to be placed under tension for opening theswitch member of said contacts, said contacts being adapted to retain said switch member closed until the spring is placed under tension.

r 11. The combination with a motor of a switch for controlling the-same comprising a movablemember and a plurality of switch members resiliently mounted thereon and adapted to'be successively operated by said movable member, the first of said switch members being arranged, when closed, to complete the motor circuit, the second of said switch members being arranged when closed to change the circuit relations of said motor to increase the speed thereof, and the third of said switch members being arranged when closed to change the-circuit arrangements of the motor to still further increase the speed thereof said third switch member adapted, when the switch is open. to close a circuit across the terminals of the armature, whereby'the motor will act as. a dynamic brake. 1

12. In a'motor controlling switch, in com bination, a longitudinally movable member,

a plurality of switch members carried thereby and adapted to be successively operated by said movable member, the first of said switches when closed being arranged to complete the motor circuit, the second of said switches when closed being arranged to out outthe armature resistance of said mo tor and the third of sand switches being arrality of stationary contacts arranged in pairs,the pair of contacts first engaged bythe of contacts a movable member, a plurality of switch members carried thereby and adapted to be successively operated by said movable memher to vary the speed of the motor,-'6ne of said switch members, when the switch is open being adapted to complete a circuit" across the armature terminals to cause the motor to act as a dynamic brake. 5

.14. The combination with the motor, of a switch fol-"controlling the same. comprising a movable memberanda plurality of switch memberscarried' thereby, and successively I operated by" saidv movable member,'the' first of said: switches being adapted when closed to complete the motor circuit, the second of said switch members being adapted when closed to change'the circuit relations ofthe motor to increase the speed thereof, the third of said switch members being adapted, when in one position, to further change'the'cin cuit rentiohsnrthe motor to further increase tlie speed thereof, and whenin another' position when the remaining switches are opened tocompl'etea circuit-across the armature teiininalsto cause the 'motor to act as a dynamicfbrakei" I I 15. In a switch, the combination with a base, a/rod'l'o ngitudinally movably mounted thereon, a contact carried thereby, a Sta-- tionary contact'mounted on said base form ing the polepiece'ofan electroma'gn'et, said rOdadapted to close I the contacts when' .moved in one direction,- and means to quickly break contact whe'n'the rod returns ton'ormal position.

16. In' longi tudi witch, "the combination with a l movable member, a plurality iently mounted thereon, a plurality of stationary intacts'ada'pted to be successively. bridge y the-contacts on the movable member, twoof said stationary contacts forming the'pole piecesof an electromagnet,- and a spring adapted, when placed under tension, to quickly open the last contact held by the polesof the electro-' ma-gnet.

17. In a switch the' combination with a supporting frame,'of alongitudinally movably mounted member in said frame, a spring tending to return said member to its initial position, a plurality of contact disks loosely mounted on said member, springs interposed between said contact disks, a plumovement of the member forming'the pole pieces of an electromagnet, and a. spring adapted to quickly open the pole contacts QiL'In-a' motor when the member is returned toinitial posiframe adapted toreceive' one end of said movable-member, a spring the socket tending to keep said member in its initial position, a pluralityot contacts arranged in pairs on said frame and insulated therefrom,

a plurality of resiliently mountedswitch members on said movable member adapted to successively engage the contacts, the pair of contactsfirst engaged byt-he movement of the member forming-the polepieces on an electromagnetyand means adapted to have energy stored; therein to; quickly open the switchmember held by the electromagnet.. 19. In a motor controlling device, in com-- bination, a movable member, a switch resiliently' mounted upon said movable member and adaptedto be actuated thereby to close the motor circuit, and means actuated by said member upon continuous movement thereof ito'vary 'themotor speediat will after'the Y motor circuit has been closed by said switch.

20. In a motor controlling device, .in comfbination, a movable member having a plurality of switches resiliently mounted thereon' for controlling the continuity of the "motor circuit and'the speed-pf the motor,

said member upon continuous movement beingadapted to successively close. said switches to first close the motor circuit and.

thereafter vary thespeed of the; motor at.

her, a switch resiliently mountedthereon and adapted to-be actuated thereby/co close the motor circuitand means adapted to be ops. erated'upon continuous movement of saidoperating member-to vary the speed of the motor at will. I

22. In a motor controlling device, in com;

'bina'tion, a longitudinally movable member, a plurality of switch contacts, certain of the same being resiliently mounted upon:'said member, cooperating stationary contacts for said switch contacts, said switch contacts to controlling device, in com- 'bination, a slidably mounted operating mem-- control the continuity of the motor circuit v and the speed of the motor, said member being movable to first close the motor circuit and upon continued movement to vary the speed of the motor at will.

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

CHARLES E. CARPENTER.

Vitnesses: v

' I. J. HORTON,

ROBERT LEWIS AMns,

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