US778073A - Elevator hoisting mechanism. - Google Patents

Description

BEST AVAILABLE COPY Nb. 778,073. PATENTED DEC. 20, 1904.

H. ROWNTREE. I ELEVATOR HOISTING MECHANISM.

APPLICATION FILED MAR. 4, 1902. N0 MODEL.

GSHZJETS-SHEBT 1.

SEST AVAELABLE com H. ROWNTREE. ELEVATOR HOISTING MECHANISM.

APPLIUATION IILBD MAR. 4, 1902. H0 MODEL.

PATENTED DEC. 20,1904.

6 SHEETS-SHEET 2.

BEST AVAILABLE COPa 1%. 778.073. PATENTED DEC. 20, 1904.

H. ROWNTREB. ELEVATOR HOISTING MECHANISM. APPLZOATIONIILED MAE. 4, 1902. H0 MODEL.

l3 SHEETS-SHEET 3.

BEST AVNLABLE COP No. 778,073. PATENTED DEC. 20, 1904 H. ROWNTREB. ELEVATOR HOISTING MECHANISM. APPLIOATION FILED MAR. 4, 1902. N0 MODEL.-

6 SHEETS-SBEET 4.

T AVNLABLE O PATENTED DEG. 20,1904. H. ROWNTREB.

ELEVATOR 1101mm MECHANISM.

APPLICATION FILED MAB..4,1902.

NO MODEL.

6 SHEBTS-SHEBT 5 )yfid {15/1 BEST AVAQLABLE COPi No. 778,078. PATENTED DEG-{2.0, 1904.

I H. ROWNTBEE.

ELEVATOR HOISTING MEOHANISM. I

APPLICATION FILED MAR. 4, 1907. 7

N0 MODEL. 4 e SHEETS-SHEET e.

UNITED; I

A (-ORPORZ YIIQN OF ILLINOIS.

BESTAVAlLABLE com Patented December 20, 1904.

ILLINOIS, AssmNon 'ro Bemna'rr :oMPANr, or emeaeo, lLLlN()-IS,.

ELEVATOR HOISTING MECHANISM.

SEECIFICAIION forming part of Letters Patent 110.778.073, dated December 20, 1904. Applic-atioii filed March 4,1902. Serial No. 965%.

To (all within/H m. w/l./:/'r/z,: Be it known that I, Il Anou) Ron's'rnm-l, a a citizen of the United States, residing at Chie ago, in the countyof (look and State of illineis, have invented anew and useful Elevator i Hoisting .\'lechanism, of which the following i is a specification. i i

This invtntion relates to elevator hoisting mechanism.--

'lh'e object of the invention is to provide a construction of elevator hoisting mechanism which is simple and etlicient and wherein is included means controllable from any landing or tioor for starting the hoisting-motor in op- 5 oration and :uttomatically arresting'the same when the car reaches a predetermined stopping-point. j

A further object of theinvention is to provide means whereby when the motor-control l 0 nn-chanism is set from any floor to start the car upon its travel to any desired or predetermined stoppingpoint the particular floor to which the car is traveling or at which the car is at rest will be indicated at each l'looror point from which the motor is controlled.

A-fnrthcr object of the invention is to pro- I vide means whereby as the car approac-hes its predetermined st.op,-iing-point the motor will v automatically d crease its speed/s 39 A further object of the invention is to providea combined specdor motor controller and floor-controller.

A further object is to provide means cooperating with the motor controller means wherebywhen any door of the elevator-shaft or well b open all .the other doors are locked in closed posit-ion and the motor-controlling 5 means are also lUClUKl.

7 Other objcrts of the invention will appear t more fully hereinafter.

The invention consists, substantially, in the eonstruetion, combination, location, and ar-E rangement of parts, all as willbe more fully I hereiiialter set forth, as shown in the accomtapanying drawings, and finallypointed out in the appended claims. a

r Referring to the accompanying t lrawings,

. controller. Fig. 4isatview in transverse st.

I troller.

and to the various views andreference-signs appearingthereon, Figure Us a view in plan, somewhatdiagrammatical, of. an elevator hoisting mechanism embodying the principles of my invention. 'Fig. 2 is abrokenview in elevation, showing the application'of my invention and the means forcontrolli'ng the motor from any landing or stopping-point. Fig.- 3 is a broken view in end elevation; parts broken out, of the combined motor and floor tion of the samegi Fig. 5 is a view illustrat-- ing a modified form of means for controlling the motor from any desired floor or landing and embraced within the spirit and scope of my invention. Fig. (his a detached detail view in'plan of the switch for controlling the circuits. Fig. 7 is a side elevation of the same. Fig. 8 is a. broken detail view in section'on the line 8 8, Fig. 6, looking in the direction of the arrows. Fig. 9 isa' detail view in plan of a form of switch-operating mech anism located at a floor or et'mtrolling-point and by .which .the switch may be operated. Fig. 10 is a broken detail view of the same onv theline 10 10,'Fig.-9, lookingin thedirection otthe arrows. Fig. 11 isa broken detail view on the linell 11, Fig. 10, looking in the direction of the arrows. Fig. 12 is a broken detail view, somewhatdiagrannnal-ic, ol'a portion of the combined motor and floor con- Fig. 13 is aflbroken view, partly in elevation and partly in section, showing the application of'a combined door and motor controller locking means embraced in the scope of my invention. Figs. H5, 1:3, and H; are detail views in section, l igs. H and 15 being on the lines 14 l4 and l5 15, respectively; of Fig. 13 and showing relative arrangement of the combined door and motor controller lockmg means at the various lloors. Fig. 17 is a view in plan, somewhat diagranmnitic, illustrating the. circuit connections,parts being broke-doll. p

The same part is designated by the same reference-sign wherever it occurs throughout the several views.

5 geared to be rotated from the motor.

Beer avmmsrs Cops,

Referring to the accompanying drawings, 7 The strips A. and B are interrupted interme "A designates'a motor, which may be of any suitable type or construction. B designates the hoisting-drum; C, the car; D, the hoisting-cable, connected to the car and operating-over drum B. The drum B may be suitably geared to be driven from the motor-as, for instance, through the gear Ein a well-understood manner;

. IO The combined motor and floor controller may be of any suitable or convenient construction and arrangement. In the particular form shown, which I have found efiicient for the purpose, it comprises a drum F, siiitably A convenient arrangement is shown wherein drum F is driven through gears G froma' shaft H,

receiving rotation from the shaft othoisting drum B'as, for instance, through the intermeshing gears J. Y These gears should be so relatively proportioned as that a definite relation will exist between. the rotation of the controller-cylinder Fand the hoisting-drum B. For instance, during the travel of the car 5 from one extreme limit of its movement to the other the controller-cylinder should be given a definite and correlative number of complete rotations.

1 K designates a :holder frame or support 3 mounted to travel lengthwise with respect to the controller-cylinder F. The travel of this support or holder lengthwise of the controller cylinder should bear adefinite relation in speed and extent to the rotations imparted to said cylinder.

- Any convenient form of mechanism for imparting travel to the holder or support K may be provided. I have shown a simple arrangement wherein said holder, support, or ring K 4 is engaged by screw-rods L, driveln by gears M from shaft H. Mounted upon hetlder, ring, or support K are a series of arms N O P, corresponding in numberto the number of floors or landings at which the car is to stop. Carried by each arm N O P, but insulated therefrom, are a series of contacts marked, respectively, A B C D'ior arm N, A B G D for arm 0, A B C D for arm P, said contacts being also insulated from each other.

' 5 Mounted upon the peripheral surface of cylinder F, but insulated therefrom, is a series of conducting-strips A B C D, corresponding in number to the insulated contacts carried by the various arms. These contact- 5 5 strips are spirally arranged upon the surface of cylinder F, as clearly indicated in Fig, 1, and in length they-bear a definite relation to the length of travel of support or carrier K. These contact-strips are continuous throughout their entire spiral length. except that strip D,ata suitable point in its length,is broken and is cross-connected to strip C, as most clearly indicated in Figs. 1 and 12, and, similarly, 0on tact-strip C is interrupted intermediate its 5 length and is cross connected to strip D.

diate their length, their interrupted ends be-' ing directly connected across the gap in series with each other, asclearly shown in Figs. 1 and 12. The interruptions in these strips should be so relatively located as that the contacts carried by the" various arms N OP'will occupy a position over the interruptions when the car arrives at the floor or landing correspondihgthereto. Thus in the arrangement illustrated in Eig. 1 the arm 0 is in position over the interruptions in the cylinder-strips, and consequently the car is at the floor corresponding to the arm 0, the interruptions in the strips serving to break all the circuits con trolled by the contacts carried by said arm 0. Similarly, when the cal reaches the floor corresponding-to the arm N of the combined motor and floor controller the interrupted space in the controller-strips will be brought under the contacts carried by said arm N, so

as to break all the circuits controlled by said contacts, and so on throughout all the floors and contact supportingarms. In addition to the interruptions in the length of the contactstrips, as above explained, the strip A is in terrupted at various points on opposite sides of the floor-controlling interruptions, as indicated in Fig. 1, thes tions of said strip being connect-ed in sei'i s through resistances R. Similarly. contact-strip .O is formed in sec? tionsconnectedin series through resistances R on.one side of the floor-controlling interruption, and on the opposite side of said floorcontrolling interruption the strip D, to which said strip 0 is cross-connected, is formed into.

sections coupled or connected up in series with each other through the resistances R. At one end thecylinder F is provided with a series of conducting-rings A B (J D'. The ring D is in electrical connection through a wire or other conductor f with the contactstrip C at a point adjacent to the opposite end of the controller-cylinder.. Said conductor-ring D is also in electrical connection through wire with strip D at the end of the cylinder adgacent to ring D. Similarly,

IIO

ring (I is in electrical connection, as through.

wire f, with strip Gv and ring 13 is in electrical connection, through wire f, with strip B, and ring A is in electrical connection, through wire f, with the section of strip A next adjacent the floor-controlling interruptions therein, asclearly indicated. The rings A and B are respectively connected, through suitable brushes'G and wires-f f, to the terminals'of the motor-field windings, and rings CD are respectively connected through similar brushes G and conductors ff'", with the brushes of themotor-armature circuit.

Circuit 'is completed from a source of electrical pressure any suitable or convenient ance with the-principles of my invention I proposefto employ a switch which is controliao .switch.- In practice, however, and in accordl I g lable from any desired fioor or landing at which thc car' is to stop, or any suitable controlhng-po1nt,.and mymvention contemoperating the switch or for completing circuit tothelmotor and lioorfcontroller. I have shown a simple arrangement embodying these principles wherein I employ a switch (designated generally by reference-sign Q, Figs. 2, 6, 7, and 8) comprising an insulated plate S, upon which are mounted. conducting-strips E E respectively connected to the main supply and return wires. Mounted upon the insulated plate S are contacts a, 7/ c d, a 6 11", 11, t c (Pi-arranged insets corresponding to the contacts carried by the various arms N O P, &c. -E E are contact bridging-plates adapted to be moved over the sets or scries'of contacts a .11 c,. &c., to bridge the circuit therebetween and between the contact-strips Y 1" 1 Thus the bridging-plate E" when moved intoproper, position will bridge the space between strip E and contacts a 7/ or between said'sstrip E and contacts a t 'or strip E and contacts a 7', according to the position to which said bridging-contact is moved. Similarly,bridging-contact E may bridge the space between contact-strip E and either pair of contacts .0 (Z,@ (Z or 0 4 according to theposition to which said bridgingcontact maybe moved; As above indicated, each set of contacts, Z1, 6' a ll or a Z1 0 (Z or (fl/ 0 01 corresponds to a floor or landing for the car.

Consequently the position to which the bridging-contacts E E are moved controls the su pply of current to the floor-controller for any desired predetermined fioor or landing. I have shown a convenient arrangement for actuating the switch wherein said bridging-contacts E E are carried upon a lever E, mounted upon a shaft E said shaft being arranged to extend to or past each floor or landing, and

at each floor or landing said shaft may be provided with a lever E, by which said shaft may be rocked. and associated with each lever E may beadiai-platc E", carrying indications for the various floors or landings at which the car isto stop. "From this construction and arrangement it will be seen that the shaft E'f may be rocked from any floor or landing-place into position corresponding to any other floor or landing-place and that the switch-arm E" 'will be correspondingly rocked when any one of'saidlcvcrs is-manipulated. It will also be seen that the lever at each floor will indicate the position to'which the switch-lever is rocked, and consequently will indicate the location of the car, thus enabling me to predetermine the point, landing, or'fioor at which the car is to stop. If desired, the movements of the switch-arm E may be regulated by any convenient arrangement of (lash-pot, (indirated at E", 'Figs. 6 and 7.)

It is obvious that many other devices may BEST AvAiLAeLE COP;

is arranged to engage over pulleys or sprocliets on the shaft of switch-arm E and, similarly, over sprocket-wheels or pulleys at each floor or landing and to which sprocket-wheels or pulleys are connected pointers or operating-levers F, cooperating with dial-plates F", each carrying indications corresponding to the .various floors orlandings at which the car is to stop. It is obvious that many other forms'of construction may-be readily devised for effecting the proper actuation of the switch from any floor-ior landing, while at the same time indicating at each floor or landing the position to which the switchhas been actuated. 4

The various contacts carried by the dialnected to contacts B' B B, contacts 1/ I) b are respectively connected to contacts D D D", contacts c-c -c are respectively connected to contacts C" (J C, and contacts d (l -(l are respectively connected toconteicts A A A,

' The electrical operationwill' now be explained. It will be understood from the fore going description that with the combined motor and floor controller in the. position shown in Fig'. 1 the car is at the floor correspending to arm ()-that is, in the particular arrangement ill ustrated in thcd rawings thccar is at the second or intermediate landing of the three landings shown. Suppose, now, it is desired for the car to go from the second to the top landing or the landing corresponding to arm N. ltwill be seen from the foregoingde, scription that the-particularlandingto which the caristo proceed may, be predetermined from any flooror landingand the apparatusput in operation and controlled from any landing; 'lhcreforc the switch-arid l l" is manipulated so as to bring the bridging'contacts 1 E, l'cs]wcti\-'ely, into bridging relation between strip E'and contacts It I): and from strip l with contacts c d. .Thereuponcircuit is completed as follows: l lromthc main-supply -'strip E to bridging cont-act EZwberethe current will divide, one part; passing to contact 10', thence to brush B, giiilGl'lCO to contact-strip B throughout its length, connection f to ring B, connection $12, the motor-field, connection f ring A, wiref", the segment or portion of strip'A which is next .v 59, until the "-ue'xt'break "occurs, and so on,the

adjacent the interruption therein, thence through all the resistances R onone side of said interruption to contact A, to d of the switch, bridging contact E, and return-strip 5 E; The other part of the current, which divided-at bridging-contact E, proceeds as follows: From contact b'to contact D, strip I 1), through the cross connection at the interruption in the lengthofjsaid strip to to strip. Cf, through connection f, ring connection f, the motor; armature, connection f ring D, connection f to strip (3,, con:

tact C, c to return-strip Underthese conditions'the'motor starts up in the-direction;

Y r 5 determined by the di'rectien'of flow '0f current" through the circuits above indicated, thereby setting in rotation the hoisting-d rum- 3' and also imparting rotation to the controller-cylinder F, as above explained, and' the car prozd 'ceeds upon its travel, the various contactsIA'v B C? D'traveling along in constant contact with thefstrips'Af B C D, respectively; the

' entire current being carried through these strips and contacts, the'contacts carried by the'arms O P not performing any duty,- inas-I much as their-circuits are broken at the switch.

As the car approaches the'landing correspondeing to arm N,fand at which it is to stop, the

brush Cl, which'islin contact with strlpC,

=will ride over the successive breaks in said s strip'and cut into the circuit which includes said brush and strip successively, the resist 'ancesR thereby slowing down the motor grad-* J'ually as said brush Oapproache's the interruption in saidstrip or the point at which said strip is cross-connected 'to strip Di; Thus when said contact 0' is in the position indicated in Fig.- l there is "no resistance. in. the circuit. controlled thereby, and the-motor is 4Q-operatingatfullspeed 'When, however, said brush passes over the first break in said strip C, a resistance will be cut in which would slow down themotor to some extent, andthereafter- 4 I thernotor willrcontinue to travel at reduced specd but a uniform-speed of travel, until the next break is passed, whena further. re-

sistanceis cut in, thereby agailislow-ing down the motor -to a more greatlyreduced spe'ed,. and the motor'coritinuesat that reduced speed sp e being gradually reduced until finally the interruption in the circuit occurs," at which point all the circuits through the various con-y tacts A 'B' C D are broken, andthe-rnoto'r' is arrested and-the car brought to a stop at the strip'Al The current passing along wire f" from the 'field='has less resistance to pass through to reach brush A as sa1d br.ush appreaches the interruption or position correi sponding 'tothestopping-point. 1n the same fisf manner the operation can be -readily traced for any other stopping-point or landing for the car; but it is not believed necessary to specifically. trace out the various circuits for each landing-place, as they will" be readily In the operation of elevators it is desirable to. provide means for guarding against acoidents due\to carelessly leaving the elevator. shaft or well doors open In accordance with the-principles of my invention I propose to 75. provide means wherebywhen any shailgi or? Y we" door is open all the other Must-{well 3' as the motor-controller, are locked and reuiai looked as long as the particular door 'which is iopen-remains' open. Suh-i a result insures, martin thedoors must -be theta-ligament 'motoker r r snd. vfi ientibn also contemplates and -includefs fmeans wheiie.- by the doors at all landings'are'locked in'clbsed position {until the motor V-controlling are set to eausethecar'tols'fi l atla ny Patties lar-l'anding, 'and. 'then only the door-lock that particular landing isreleas'ed, 'sults may be accomplished. in many specifi ally different ways. -"As illustrative offondgo' form of mechanism foralccomplishiugthe-de- J Jf J, Each disk is providedwith'anotch16d K in the peripheraledge thereof; adapted to receive the edge of the door whenthe latter; is moved toward ope'nposition, The shaft J 7 will respectively'occupy a positionffovfer the doors when they; are closed to; orm -'.-'locks thelf for or, to prevent the same-from' ibeing opened until the notches Klare bro'ught into jbeso relatively arranged that] en the shaft Eis rocked into position riug-the notch' 1 o'fon'e disk, into placeto perm t its correspond- "disks are out of line'withtheir doora -as will be readily understood. In the-particular 'forin' of my, invention shown, to';wh1ch,-"however,

; my? invention is not to be e p1sy vertically-sliding doors. Thus whe'nfanydoor 1,2'0

is'open the edge thereof is receivedin the" notch of its correspohding disk, thereby locking shaft Eagainst rotatierrand also holding all the other disks in such positionas to-pre-' I From the foregoing descriptionit will observed that thecylinder F, with its associ ated strips spirally arranged upon the surfaces thereof, and the cooperating sets ofcoi tacts, the various corresponding to the 13g comprehended "by persons skilled in the jartl siredjobjects andasthelbestffomnin'vwhich I; 1

should be; so-f-relatively :positioned'with re- 5 f spect to the several doors thatth'edisks JJ'. 19S

proper, position for the doors" to.f-be" moved, n

and'the notches K of the variousdisks'should ing. door to openthenotch'esofi all the other.

vent any other door from being opened; j ,4 135.

BEST AVAlLABLE cor:

various floors at which the car is to stop, and the interruption in the contact-strips carried by the cylinder, together with the contactqings, constituteacombined motor, direction,

5 and speed controller, as wcllas a floor-controller, because the position of the interruptions in the conducting-strips with reference to the contacts'carriei l by the'various arms N 0 1, 620., determines. the point at which the motor-circuits are broken, and -conscq-uently the floor'or landingat which the car is to stop.' Accessories of the switch and the means controllable from any landing or stopping-place for actuating the switch or and floor controller-may be varied throughout awiderange in the specific details thereof without departure from the spirit or scope of the invention. It will also be observed that 2 my invention contemplates the provision of means whereby the motor may be put intooperation to move thecar without interruption from one end or limit of its travel to the other, .or itinay be so controlled thatthe car will stop at any predetermined intermediate stopping-point or landing. It will also be seen thatjmy invention contemplates the provision of automatic means independent of the stopping means for changing the rate of movemerit of the car as it approaches certain predetermined stopping-points, whether at the limits of its travel or intermediate points. it will also be seen that the means which effect a slowing down of the motor as the car nears the end of its travel, whether proceeding to the extreme limit of its'travel or to any intermediatestopping-point, arc actuated automatically by the hoisting-motor. .It will also be observed that the switch; which controls the 4 m0torcircuits is locked when any one of the elevator shaft orwell doors is open and that at the same time all the other doors are locked in their closed positions.

it is obvious that many variations and changes in the details of construction and arrangement would readily occur to persons skilled in the art and still full within the spirit and scope of my invention. therefore, to be limited or restricted to the ex- 5 act and specific details of construction and arrangement herein shown and described; but, Having now set forth the object and nature of my invention and a construction embodying the principles thereof, .what I claim as 5 5 new and useful and of my own invention, and

desire to secure by Letters Patent, is--- 1. in an elevator hoisting mechanism, a drum arranged to rotate synchronously with themovement of the car, conductors upon said 'drum arrangedin a pluralitv of independent rows or series, a brush lor each row or series, and means for connecting said brushes into the electric vi itgof the electric motor, as and for the p i me set forth. 5 2. .ln an elevator hoisting mechanism, a

I do not desire I 5 for completing circuit to the combined motor drum arranged to rotate synehronousb with the movement of the car, a plurality of conductors on said drum, .a. series of brushes eooperating therewith, a switclnjor throwing different sets of brushes into an electric cir cuit, and a mechanical c'onnection't'or operating said switch from different floors, as and for the purpose set forth.

- In an elevator hoisting mechanism, adrum arranged to rotate synchronously with 7 5 the movement of the car, a spirally-arranged conductor thereon having a cut-away portion, the conductor having a series of segments at each side of the cut-away portion and resistances interposed between said segments, as and for the purpose set forth.

4. in an elevator hoisting mechanism, a drum arranged to rotate synchronously with the movement of the car, a paiiof spirally-a1: ranged conductors thereon having a cut-away 5 portion, the conductors being cross-connected at said cut-away portion, and a pair of brushes contacting respectively-with the said conductors and lying in the electric circuit of the elevator-motor, whereby the motor is driven 9 in a direction to bring the gap in the conductors beneath the brushes, as and for the purpose set forth. 7

5. In an elevator hoisting mechanism, "a drum arranged to rotate synchronously with the movementof the car, conductors upon said drain, a plurality of sets of brushes con- 't-acting with said conductors and a single switch for throwing any desired set of brushes as and for the purpose set forth. V

(i. in an elevator hoisting mechanism, a drum arranged to rotate synchronously with the movement of the ear, conductors upon said drum, a plurality of sets of brushes con- 5 taeting with said conductors, and a single switch operable from any floor for throwing into the electric circuit of the elevator-motor,

any desired set of brushes into the electric circuit of the elevator-motor, as and for the purpose set forth. p

7. ln'au elevator hoisting mechanism, a

drum arranged to rotate synchronouslywith the movemcnt,of thc car, conductors upon said drum, a plurality of sets of brushes contacting with said conductors and'a single 5 switch mechanically operable from any floor for throwing any desired set of brushes into the electric circuit of the elevator-motor, as

ITO

and for the purpose set forth.

8. In an elevator hoisting mechanism, a 2 drum arranged to rotate synchronously with the movement of the car, conductors upon said drumfa plurality of sets of brushes con- -tar.ting with saidconductors and adjustably mounted upon an annular ring, whereby their 5 position with relation lto the drum may be adjustable, as and for the purpose set forth. Q 9, in an elevator hoisting mechanism, a drum arranged to rotate synchronously with the movement of the car, conductors thereon, 3

V saidfbrushe's andsa'id conductors, as and for i I eratihg with said conductors,.eachset coop field-circuit of the elevator-motor and the- 1 s5 sponding to the pitch of the spiral conductors.

over the resistances, and, actuating connec- 5 and means mechanically controllable from any 6 I 'r'rep'za and brushes cooperating with said conductors,

a verticalshaft adjacent tothe elevator-well, a switch controlled by said shaft,-and an ele-' vator-motor circuit made through said switch,

the purpose set -forth.-"

10. In an 'elevatorhoisting.;mechanism, a drum having conductors arranged in spiral form thereon, a series-of sets 'oflbruShes cooperating with a particulanconvolntihmof thespiral, an elevatorrmotor', andm'eansfor cutting the latter into an electric'circniiiahrough the said conductorsand'any desired set of I5, .the brushes, as a nd for the purpose setforth.

11. In -an" elevator'hoisting mechanism, a drain arranged to rotate synchronouslywith the movementfof the car, spirallyrari-anged condu'ctorsfthere'on, one pair included in the other in the armature-circuit, the latter conductors having cut-in resistance-segments, and

- brushes cooperatingwith thesaid conductors whereby the speedand direction of motionjof the purpose setfforth. I p a v 12. In an elevator hoisting mechanism, a drum arranged to rotate synchronouslywith the movement of'the car, spiral'conductors on 30 said drum, an'annnlar ringsurrounding said. drum, and supportinga series of sets of brushes, a pair of revolving lead-screws engaging nuts in said annular ringwhereby the latter is given an endwise movement correon the drum, as and for the purpose set forth.

13. In an elevator hoisting mechanism, a hoisting-drum, an electric motor therefor,and

a plurality of electric circuits including said 4 motor, and asingle electric switch for putting a any desired circuit in connection with the electric mains, as and for the purpose set forth.

14. In an electric hoist, a series of resistances in the motor-circuit,ia contact movable tions between the contact and the hoisting- -drum arranged to move the contact over the resistances and cut in resistance as the car or hoist nears the end of its travehas and for the Y ourpose set forth. V g I 15. In a hoisting apparatus, a motor, a con- ,roller therefor, said controller operating to break the motor-circuits when the car reaches a predetermined stopping-pointor landing,

floor or landing at which thepar is to stop for completingthe motor 'rfillClllllS to said controller, as and for the purpose set forth.

1 In an elevator hoisting mechanism, a

0 motor, a controller for the circuits of said mo-.

tor, connections between said motor; and controller for actuating the latter from the'former, said controller operating to automatically break the motor-circuits when the car 5 reaches any predetermined stopping-point,

E VAILAB LE C Q";

and means mechanically controllable from any landing for completing the motor-circuits to said contr'oller,,as and for the purpose set forth. '17, --In an electric hoisting mechanism, a motor," circuits; therefor, a reversingspeed' and fioorcontroller arranged in said circuits,

a switch forcompleting the motor-circuits to 1 said controller, and means controllable from" any floor or landing at which the car is'to stopfor actuating saidswitch, as andfor the P P 56 Set forth.

18; In an elevator hoisting mehtnimat motor, a-"controller, connections between said motor'and controller forroperatin githe. latter, 7 30', I

contact-strips carried bysaid controller and arranged inthe motor-circuits} seriesof i movable contacts cooperating with said strips,

means forautomatically moving saidcontacts coincidently with the movement of said con trdller, a switch fox-completing the motoi cirf cnits to. said contacts, and means controllable from any floor or landing for operating mitfthe motor-circuits to be broken when the car reaches a predetermined landing iorstop- 10o ping-point, a'switch for completingthe circuit of thejmotor to said contacts, and means controllable-from. any landing for actuating" said switch, as andfor the purpose set forth. 120, .In an el'evatpr hoisting mechanism, a control-cylinder carrying spirally-arranged contact-strips, ii hoisting-motor, said strips being included .in themotor-circuits, means actuated by saidmotorior rotating said cylinder,-"cooperating contacts arranged in sets, each set corresponding to a floor or landing at which the car is to stop, means for moving said contacts lengthwise of said cylinder coincident-ly with the rotation of the latter, and I means for completing the motor-circuits to 5 said contacts, as and for the purposesetforth,

21. In an elevator hoisting mechanism, a control cylinder having spirally arranged contact-strips, a hoisting-motor, said strips being included in the motor-circuits, cooperating contacts, means for moving said contacts lengthwise of said cylinder coincidently with the rotation of the latter, said contact-- strips being interrupted to cause the' motor-- circuits to be broken when the car reaches any .1 5

predetermined stopping-point, andmeans controllable from any floor or landing for completingthe motor-circuits to said contacts, as and for the purpose set forth.

an-elevator hoisting mechanism, a 39- motor, a controller-cylinder haying spirally- 'arranged insulated conducting: strips, said strips being included in the motor-circiiits and provided with interruptions, sets of cooperating contacts corresponding to the various floors. orf'landings at which the car is tostop,

:mea'n fer'inoving said sets of contacts lengthwise of the cylinder coincidently with the rotation thereof, whereby when the set of contactscorresponding to a particular floor at which the car is tost'oplreaches the interru pted portion of ssidstrips the motor-circuits are broken, and ineans controllable from any floor or landing for'completing the motor-circuit to said contacts, as and for the pnrposeset forth,

23. In an electric hoisting mechanism, a. motor, a controller for controlling the circuits of said motor and comprising a cylinder having spirally-arranged insulated conducting- BEST AVAILABLE CUP:

and means controllable from any floor or landing for completing the motor-circuits to said contacts, as and for the purpose set forth.

In witness whereof I have hereunto set my hand, this 27th day of February, 1902, in the presence of the subscribing Witnesses H ZAROLD ROWNTREE.

Witnesses:

E. (J. SEMPLE, E. DARBY;-

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