US816806A

US816806A - Electric traction-elevator.

Info

Publication number: US816806A
Application number: US28777005A
Authority: US
Inventors: Axel Magnuson
Original assignee: Otis Elevator Co
Current assignee: Otis Elevator Co
Priority date: 1905-11-17
Filing date: 1905-11-17
Publication date: 1906-04-03
Anticipated expiration: 1923-04-03

Description

No. 816,806. PATENTBD APR. 3, 1986K A. MGNUSN. ELECTRIC TRAGTON ELEVATOR.

APPLGATGl FILE) HOY, 17,

2 SHEETS-SHEET 1.

WITNESSES:

MW/fm.; a"

ATTORNY No. 816,806. PATENTES R. 3, L903.

MAGNUSGN. ELECTRIC TEACTIN ELBVATOR.

APPLIG'l YILED X0?. 17, 1905.

2 SHEETS-"SHEET Z.

f www? WITNESSES:

TTRNE? the function of which is to automatically more a contact 01 over a set of stationary contacts 92 and to thereby short-circuit an .opposition element 28, which is shown as a de tia-connected resistance connected in the rotor-circuit of the motor and to the contacts 01 '02. This movement may be accomplished in many ways*t"or example', by an electromagnet 93 attracting its core 95 when to its windinfy 94 is energized. The core 95 may be normally held in raised position by means of a spring 96.

100 designates a source of alternating-current supply, which after passing through a transformer 101 and a main-line switch 102 passes to various parts of the apparatus, as will be pointed out in the description of the operation of the invention.

The magnetic Sheave (shown in Figs. 3 and zo 4) is constructed of two

side pieces

31 and 32 of magnetic material, such as iron. These are of similar construction and may be secured together by means of bolts 33. The completed structure is preferably in the form z5 of 'a sheave or pulley having rims 34 34 and grooves 35 on its outer periphery. It may be seen from the right-hand portion of Fig. 4 that these grooves are upon projections which are alternately upon side 31 and 3o upon side 3:2. For example, the portions 35A and 35B are integral parts of the side portion 32, while the portion 35C is an integral part of the side 31. Directly back of each of these portions is a circular lug, such as 35 that shown at 35 in Figs. 3 and 4. Around each of these lugs is placed a Winding 36, and these windings may be connected by conductors 36 and 36B to collector-rings 37 and 3S on one side of the sheave 30. Brushes 4o 37A and 38A may be arranged to bear upon these collector-rings. These brushes may be supported by an arm or bracket 39, which is attached to aportion of motor 20. A manually-operated switch 16 is shown in the elevator-car 10. It comprises a pivoted lever 17 and two

stationary contacts

18 and 19.

A conductor 103A is connected tothe mainline conductor 103 `and to the pivoted lever 17. Now if an operator moves pivoted le- 5o ver 17 so that it comes in contact with stationary conta-ct 18 a circuit is closed thereby from main-line conductor 103 through conductor 103, switch 16, conductor 18^ to and through magnet-winding 73 and conductor 104A to main-line conductor 104. The Circuit which is thus completed will connect magnet-winding 73 across two of the mainline conductors, and it will `be energized thereby. It will then raise core 7'2 and its 6o connected parts, so that movable contacts 74 and 75 will be clcsed against the

stationary contacts

76 and 77, respectively, and the switch-arm S5 will be moved oil ot' stationary contact 30 and onto stationary contact SS. Aain-line conductor 103 will thus be closed to motor-terminal 22 through

contacts

76 and 74 and conductor 22". The central main-line conductor 104 is perinanentl connected to the central motor-termina 23. Main-line conductor 105 will be connected through contacts 'iand 75 and conductor 24-jk to the other motor-terminal 24. Winding 55 is connected to motor-terminals 22 and 23, sothat when the motcr rcceives current from the line brake-magnet .33 will be energized and will attract its core, and thereby draw brake-shoe 51 away from the brake-pulley 50 against the compression ol' spring 52. After the reversing-switch A has been operated in the manner just described the motor will receive current from the source of supply 100, the brake 50 51 will be released, and the motor will begin to rotate in one direction. At the same time generator 40 will' rotate in the same direction and it will generate .a current proportional in strength to the speed of the motor 20. When it rotates in one direction-for example, to the left-the friction of its brushes 43 44 upon comn'iutator 40A will cause them and the yoke 42, which supports them, to move over to the left until they strike a ainst stop 43". If the generator rotates' in tie opposite direction, it will carry brushes 43 44 and the yoke 42, which su ports them, in the opposite direction until)the yoke strikes against stop-piece 44, In this manner the current enerated by the generator 40 will always low through its series ield 45 and the conductors 43 and 44B, which are connected to it in the same"`direetioi1, regardless of the direction of rotation of the generator.

The current from generator 40 will be led through conductors 43E and 44B to various parts of the apparatus, as I will now point out. The conductor 43B is connected to the brush 38 of magnetic sheave 30 by means cf a conductor 38B. A circuit is completed through the various windings 36 of this` magnetic sheave out through brush 37 and through conductor 37H back to the other lead 44B from generator 40. The circuit through windings 36 is arranged to pass around one of said windings in one direction and through the next of'said windings in the opposite direction, and so on, so that the various scctions which these coils-excite will bc encrgized with opposite polarities. It may be seen, therefore, that the current generated by generator 40 will energize the magnetic sheave 30, so that thc latter will have a nnignetic attraction for the rope or cable 11,

which passes over its magnetically-polarized sections. Another circuit from generator' 40 'passes through conductor 43" tothe lower end of tnagnet-winding 9-1; thence through conductor 01^ to the stationary contat-ts h and S7. Switch-arm S5 is now restingr upon `stationary contact Si". and a circuit is closed thereby through conductor 35" to conductor ICO v48 will thus be energizedi bg aPP y 44B, and thence back to generator 40. Consequently the current passing through magnet-winding 94 will energiric ma'Q'net 93 and cause the latter to move the sli in Contact 94 over stationary contacts 92 an( to thusv` short-circuit the resistance 28, which is connected in the roller circuit by motor 2G through slip-rings 25, 26, and 27. The magnet 93 may be arranged to more contact 91 an amount proportional to the voltage generated by generator 40, which, as has been shown, is proportional to the speed of motor 20, This has already been described fully in my prior ap lication before referred to, and hereforewil not be more fully described ere. i

As the rope or cable 11 is driven b magnetic sheaves 30, it is evident that asft e motor 20 rotates its motion will be imparted through rope or cable 11' to the elevatorcar 10.

When it is desired to stop motor 20l and elevator-car 10, the operator may bring bachYY the lever 17 of switch 16 to ita central tion, when the magnet 70 will become Y ergized and will allow the movable contacts 74 and 75,130 drop away from the stationary contacts 7 6 and 77. The current Wi'llthe'refore be cut off the motor 2) and from brake' magnet 53. The brakcwhoe 51 will thin-'e-n fore be ap lied by spring 52 to brake-pulley and' cause the motor and thecar to come to rest. At the same time contactarm'85 will be moved onto etetireneQ Acontact' 86 and a circuit will be coseti erely from generator 4f) through condctor' and conductor 43 to the lower end'of'tngi, net-'winding 49, through conductor 49, :stationarycontact S6, switch-arm 85, conductors 85* and 44B, back to generator 4G. Magnet the cnn-ent of enerator 40 and wil rake-shoe 47 to rake-.pulle 46 with a pressure proportional to the spec of the motor 20. If the operator had moved opposite-direction, so that it carne in contact with stationary contact 19, magnet 69 would have been energized and would have raised its core 62.and closed the contactswhich it controls. The main-line current would have then been Aclosed to motor 20 in the opposite direction and its rotation would have been op osite to that reviously described.

t is evident that the reversing-switch may be manually operated by means of the handle 84;' but the operation of the various parts would be in thisfcase similar to that above described.

While .I have shown one form of motorcontrollng systems in combination with my present-invention, it is a plicable aswell to many other -orms of e crater-controllers, and 'I therefore do not limit myself tothe specific system herein shown and described." "I have shownumy magnetic sheave 30 coneheave and the lever 17 of switch 16 in the' sheave and the car, and a generator connected to run with the motor and conneeted'to the Winding. a i

3. An electric 'motor, a magnetic eheave arranged to be driven thereby, said sheave A comprisin sections along its peri her arranged to Vc'alternately magnetize wit o posite polarties, a. car,` a cable connecting t e the car, anda generator connect ed to run with the motor and arranged to energize the sheave.

i" '4. An electric motor, a magnetic sheazve Yarranged to be driven thereby, said sheave having two side pieces, each of which forms a rim and carries upon it alternatel -project- 'ing portions which for-mits per-ipY ery, saidV portiol being arranged to be alternately 'magnetized with o pcste polar-ities, a car, a cable connecting tlie' ehearfel and the car, and a generator connected-to 'run with the motor .and arranged to ener izo the sheave.

An electric moo'r, a magnetic sheave arranged to bedriren thereby, said sheavel 'havingltwo side pieces, each of which forms a rim and carries 'u' on it alternately-projecting portions which gorro its periphery, awinding for each of said portions, a car, a. cable connecting the sheave andthe car, and a generator connected to run with the motor-and arranged to energize thclsheave. i'

6. An alternating-current motor, a magnetc'sheave arranged to be driven thereby, a 'carga cable connecting the sheave and the car, and a direct-current generator connected to run withithe motor and arranged to energize theehcev.. 7.An alternating-current motor, a startin-vtch therefor, a magnetic sheave arranged to be driven therebv, a ear. a cable connecting the sheave and t e car, and a direct-current generator connected to run with the motorv andar-ranged to energize the sheave. i

8. An alternating-current motor, a reversing-swtch'for the motor, a magnetic shcave arranged to be driven thereby, a car, a cable connecting the sheave and the car, and a'direct-current generator connected to run with the motor 'and arranged to energize the Ysheave.

YAn alternating-current motor, an electrically-actuated reversing-switch for the motor, a magnetiosheave arranged to be driven roo therein'. n can a cable cannet-ling the `s'heave and the ear. and a direct-current generator connected to rnn with the ntntor and ar ranged lo enetgiz't` the aheave.

itl. \n alternating-current motor, an eleclVieillir-actttated revetzsing-switeh therefor. a :n.ignetitl l"heave arranged to heoriven thereh v. a ear. a cable connecting the `sheave and the ear. a directcurrent generator connected to rnn with the niotor and arranged to energize the sheave. and meansl for operating the reversing-switeli from the car.

1]. Analternating-current motor, a brake for the inotor. a niagnetie `sheave arranged to be driven by the niotor. a ear. a cable connecting the sheave and the car. and a directeurrent generator connected to run with the motor and arranged to energize the slieave 1j). An alternating-current motor. an electrirallv-aetnated reversing-switch therefor, an electideally-actuated brake for the motor, a niagnetic sheave arranged to be driven by the inotor, a ear, a cable connecting the sheave and the car, a direct-current generator connected to run with the motor and arranged to energize the sheave and lneans for o `ierating the reversing-switch and the brake roni the car.

' 13. An alternating-current motor, a magnetic sheave arranged to be driven thereby, a ear` a cable connecting the car and the sheave, a direct-cnrrent generator connected to run with the motor and arranged to generate a voltage proportional in .strength to the speed of the motor, said voltage being arranged to energize the shcave.

14. An alternating-current motor, a niagnetic sheave arranged to be driven thereby. an opposition element in the motor-circuit, a ear. a cable connecting the car and the sheavc, a direct-current.generator connected to run with the motor and arranged to generate a volt age proportional in strength to the speed ,f the motor, said voltage arranged to energize the sheave, and means actuated by said variable voltage for automatically cutting the opposition element out of the motor-circuit.

15. An alternating-current motor, a magnetic sheave arranged to be driven thereby, an opposition element in the motor-c1rcu1t,a car.

. a cable connecting the car and the slieave, a

direct-current generator connected to run with the motor and arranged to generate a voltage proportional in strength to the speed of the motor. a brake applied b v the variable voltage in stopping.- -Said voltage being arranged to energize the lheave` and ineans actuated b v said variable voltage for autoxnaticallv cutting the opposition eletncnt ont of the xnotor-eircnit.

Hi. An eleetriel niotor, a magnetic shcave arranged to be driven thereby. a car, a cable nl' magnetic material connecting the sheave and the ear and a generator connected to run with the motor and arranged to energize the sheave.

17o An electri(I niotor. a magnetic sheave arranged to lie-driven thereby, a car, a countet'weight, a eahle of magnetic material running on the sheave and connecting the car and the eounterweight and a generator con-` nected to rnn with the motor and arranged to energize the sheave.

1S. An alternating-cnrrent motor, a inagnetic `aheave arranged to he driven thereby, a reversing-switch for the mot-or, an opposition element in the inciter-circuit, a car, a cable connecting the ear and the sheave, a direct -current generator connected to run with the motor and arranged to generate a voltage proportional in strength to the speed of the motor, said voltage arranged to energize the sheave, and an electroresponsive device actuated by said variable voltage for automatically cutting the opposition element out of the motor-circuit.

'19. An alternating-current motor, a mag-A' netio sheave arranged to be driven thereby, an electrically-actuated reversing-switch for the motor, an electrically-actuated brake for the niotor, an opposition element in the Inotor-circnit, a car, a cable connecting the car and the' sheave, a direct-current generator connected to run with the motor and arranged to generate a voltage proportional in strength to the speed of the motor, said voltage arranged to energize the sheave, an electroresponsive device actuated b v said variable voltage for automatically cutting the opposition element out of the motor-circuit and manually-operated circuit-closer for operating the reversing-switch and the brake.

20. An alternating-current motor, a magnetic sheave arranged to be driven thereby, an electrically-actuated reversing-switch for the motor, an electrically-actuated brake. ar

vice actuated by said variable voltage for au-V tomatically cutting the op osition element out of the motor-circuit an a car-switch arranged to control the movement of the motor.

21. A motor, a magnetic sheave arranged to be driven thereby, a car, a cable connecting the sheave and the car, and a generator connected to run with the motor and arranged to energize the sheave.

"9 A motor, a magnetic sheave arranged IOO IOS

IIO

amasar B to be driven therebyrsgid sheve com rising;s terweivht and a gneraor connected Ato run sections' alpnits periphery arrange" .to be g with t a motor and arranged to energizuthe alternately maggntized Wlth opposite p0 sheave.

larties, a, carfa, cable connecting the shcave l In 'testimony whereof I have signed my IKS Vand the car, and a, generator connected to Rm name to this specification in the. presence of with the motc'g'und arranged to energize the two subscribing-witnesses- *hemf AXEL MAGNUSON.

23. A motor, a, magnetic sheave arranged i to be driven thereby, a, car, a. counterweight, Witnesses: a cabe of magpetic material running over the JOSEPH E. CAVANAUGH, 1 ERNEST W. MARSHALL.

shear@ and comc'tng the car sind the court