US1175350A - Hoist operating and controlling system. - Google Patents

Description

E.FB|EDLAENDER. n Hols OPERATING AND CONTROLLING SYSTEM.

n APPLICATI'ON FILED APR. 23, 1913- l v 1,1 (5,350. Patented Mar. 14,@916.

' 4 sHETsmsHEET 1'.

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man

UTNSSQS y H vINVENTQH u W/W E. FRIEDLAENDER. HOISTYOPERATING ANDCONTROLLING SYSTEM.

' APPLICATION FILED APR. 23, ISIS. l1'?5350. K Patented Mar. 14,1916.

4 SHEETS-SHEET 2.

FIG. 2

FIG.3

INVENTOR E. FRIEDLAENDER. Hofs OPERATING AND coNTHoL'LrNG SYSTEM. APPLICATION FiLED APR.23, l9i3.

Patented Mar. M, 1916.

4 SHEETS-SHEET 3.

FIG. 5

wemsssas mwN-ron vK/Qwyb/ fm V5.FRmDLAENDEw HOIST OPERATING AND CONTHOLLING` SYSTEM.

APPLICATION FILED APR. 23. 1913.

, lgl'a PfIIenIed Mar. 14,1916.

4 SHEETS--SHET 4.

INvENToR WETNSSES UNITED STATES iA'riiN'r onirica.

EUGENEFRIEDLAENDER, OF BRADDOGK, PENNSYLVANIA, ASSIGNOR T0 WESTING HOUSE ELECTRIC &. MANUFACTURING COMPANY, A CORPORATION OF PENNSYL-l VANIA.

To all 'whom t may concern.' y l lie it known that I, EUGENE' -FRIEDLAEN- man, a citizen of the United States, and resident of Braddock, in the county of Alleglieny and State of Pennsylvania, have invented certainiiew and `useitul Improve ments in Hoist Operating and Controlling Systems, of which the following isa specification:

My invention relates to the construction and arrangement of .means for regulating and controlling the operation of electric motors," employed in actuating hoists, elevators,

, .and the like, and, although not restricted to suoli uses, the invention more particularly relates to the construction andl arrangement ot means employed in regulating and controllingthe operation of motors for skip `lioists, forming part of the equipment of such selected distanc`e whereby the hoist is lautomatically vcaused to travel through a selected.. distance and whereby the speed of the hoist is varied in redeterininedpor" 'ons of its travel through Another 'Object of my inventionA is to pro` vide a. hoist operating and controlling system whereby, after the apparatus vis set in motionfthe bucketsor cars'of the i skip 'hoists are automatically causedV to moverst slowly and at a gradually accelerating speed, then at maximum speed and tothen gradually slow down, and are always brought to rest or` stopped inthe same position at each end of the travel independently of and without reference to fluctuations in the weight of the successive loads on the hoist, tothe hoist operator or to the supply of current to the, driving motor. y

A further object of the invention is'u to provide a hoist operating and controlling system having novel means whereby the ap-y paratus is rendered inoperable or the direction of travel 'is reversed or by which the hoist is caused to stop with entire safety at any point in the length of travel.'

A still further object of this invention is HOI'ST OPERATING AND CONTROLLING- SYSTEM.

Specification of Letters Patent.

to provide a hoist operating and controlling system having improved means whereby. the

operation of the hoistdriving motor is regu-y lated and controlled in case oi'. an overload or when the power is shut off, or in the event of accident to the motor or the mechanism connecting the motor and skip buck ets or cars.

Still other objects of rny` invention will become apparent as the co-acting mechanical and electrical features of the invention are hereinafter more fully described and claimed.

lei'erring to the accompanying drawings forming part of this specification and showing inyiinproved autoinatic'operating and controlling system as applied for use on the double skip hoist of a' mechanically charged blast furnace, Figure l is a plan illustrat ing the manner in which the automatic controller and the safety cut-out are mechanically connected to the skip hoist driv- Patented Mar. 14, 1916. Application led April 23, 1913. Serial No. 763,072. A

ing mechanism. Fig. 2 is a side elevation,

on an enlarged scale, showing the construction of the automatic 'controller and the connections thereto 'forming part of my invention. Fig. 3 is a sectional` endl elevation of the controller, the section being taken on the line IIIMHI of Fig. 2. Fig. 4 is a scctional side elevation of my'improved conf troller as connected to the skip hoist, the

section being taken on the line IV-V of Fig. 1. Fig 5 is a sectional end elevation on the line V-V ot Fig. .4 showing the construction of the weighted swinging arms and the quick-break switches forming part of the controller mechanisni.- Fig. 6 is a sectional end elevation ofthe apparatus shown in Figs. l r'to 5, the section being taken onthe vline VI-V of Fig. 4. Fig. 7 is a planshowing, diagramniatically. the wiring system and arrangement of switches and re lays formingpart of' this invention. Fig. 8 is a Adiagrammatic plan showing one arrangement of gears connecting the drum shaft and the automatic controller in accord ance with my invention. Figi) is a similar diagrammatic lplan showing one arrangement or gearing for connecting the safety cut-out with the drum shaft in accordance with this invention.

In the accompanying drawings the jnumeral 2 (see Fig. l) designates one end of the. rope drum of a motor driven double skip hoist having an automatic, mechanically actuated controller 3, a mechanically operated safety cut-out 4 and a manually controlled operators switch 5 that 'are operatively connected in accordance with my invention.

The hoist shown being a double skip hoist, a load will he lifted b v a skip car or bucket when the rope drum 2 is rotated in either direction.

Theropewinding drum 2, upon which the hoisting ropes arc coiled and uncoiled in operating the hoist, has a shaft 6 which 1s 'rotatably mounted by its ends in pedestal hearings i' (of which but one is shown) and the construction of the drum, not f0rming part of this invention, isnot further described.

Theend ot' thev drum shaft (lwhich projects through the bearingl 7, has al spur driving pinion 8 keyed or otherwise secured thereon which meshes with and drives an idler spur gear rotatably mounted on a stub shaft 10, which is secured to and projects from the side of the pedestal bearing 7.

' The spin' gear D is connected to and drives 13, which projects through a spur pinion 11 on the shaft 10 which, with the gears S and f) forms the reduction gear mechanism operatively connecting the spur gear 12 to the drum shaft 6, the gear 12 being mounted to rotate on the controller shaft 13 when the rope drum 2 is moved.

The controller shaft 13 is rotatably mounted by one end in a hushed dead-eye bearing 14 which is conveniently formed in the pedestal bearing 7, and is located below and to one side of the axial center of the drum' shaft 6. A

The opposite end of the controller shaft the hushed opening in the stand 15 forming part of the controller, is provided with a double arm 16, keyed or otherwise secured thereon to rotate ov oscillate with the shaft 13. is provided on opposite sides of its pivotal center with a 'series ot electrically connected contact Hngers 17, 18, 119 and 2O and 21, 22,

23 and 24 which are positioned at separated intervals in the length thereof and engage with the faces ofthe series of segmental contacts on the controller in-a manner to be described. Also keyed to the shaft 1,3, at an intermediate point in the length of the shaft is a wheel 25, (see Figs. 4 and 6) having removable lugs 26 and 27 cured on its periphery.

are made adjustable to being made in the length These lugs, which enable varlatlons adj u stably se.

switchesare closed, by metal disks 46 andv one side near the 'on the end of and rotating with the drum shaft 6. The wheel 25 is also provided with lugs 429 and 30 which extend outwardly on periphery of the' wheel and are arranged to engage with the lugs BLand 32 located on the side of swinging weighted arms 33 and 34 which are pivotally secured by one end to turn on thev shaft .13 between the wheel 25 and the frame or stand 15'of` the controllerl 3. The

arms 33', 34 are, bv

engagement with the respectivelugs 3l4 and 32, caused to lift or swing when the wheel 25 is moving through certain arcs or portions of its rotary movement. l

Secured to a boss 35 on the inner face of the controller stand 15, is 'a stop' 36 having faces 37 and' 3S which are arranged to be engaged by thevend faces'39 and 40 of the weights on the swinging outer ends of the arms 33 and 34 and thereby limit the downor oscillatory pathsV of ward swinging mo"ement of these arms in these nick-break switches being arranged to brea z the control circult 1n bringing the skip cars orbuckets to a stop at theend of the upward and downward travel thereof.

The pairs of pins or contacts 42--43 or are engaged, when the quick-break ,47 which. are arranged to bridge the gap The arm 1G of travel of the skip cars or buckets, engage with the lug 284 on the side oi' the spur gear wheel 12, so-

that the wheel 25 is caused to turn on its` axis in either of opposite directions when the gear 12 is actuated through the medium of the gears 9 and 10 and the gear 8 secured vlevers or arms between the adjacentpins in each pair, a

disk being rotatably secured in the fork of the bifurcated outer or swinging end of each. of the levers 48 and 49. Each of the atone end tothe insulatingmaterial 41 and isprovidedfat an intermediatev point 'in its length with a projection or lug 50 positioned to be engaged -by the bent outerzend '51 or 52 of the swinging levers or arms 53 and 54 also pivotally secured at oneend to the insulating material' 41. Stops 55 are provided on the slab or sheet of insulating material 41 to limit the downward swinging movementof the arms 53 and 54. The varms 53 vand 54 alsohave lugs 5() and 57 respectively at intermediate points in their lengths which are adapted to bel engaged by the end of cap 48 and 4 9 is pivotally secured los bolts 58 and 59 respectively. The bolts 58 and 59 are adjustably secured in screwthrg'aded holes in the lugs 60 and 61 on the side `of the weighted swinging end of the weighted leverA arms 33 and 34, and locknuts 62, 62 on each bolt serve to hold the cap-bolts 58 and 59 vin adjusted position Aon ther arms 38 and 34.

As willbe seen by reference to Fig. 5, the' point of engagement between the cap-screw 58 andV lug 56 and the cap-screw 59 and lug 57 on the respective swinging arms 53 and 54 is at a point located between the middle of the length and the pivot end of these arms and is, therefore, closer to the pivot end than to the swinging end thereof.A Also the point of engagement of the bent end 51 of the swinging arm 53 and bent end 52 on the arm 54 with the lug` 50 on the forked arms 48 ,and 49` is similarly between a point in the middle of the length of these arms and the` pivot end thereof so that .when the slowly moving weighted arms 33 and 34 engage with and operate to actuate the arms 53, 48 or 54, 49, the movement of the disks 46 and 4.7 on the ends of the arms 48 and 49, owing to the compound leverage, is veryV quick. (The ratio shown is 15 to 1.)

Mounted upon the" bosses 08 on the front side of the` frame 1-5 of the controller 3 is the annular face 64 of the controller, which is lf'orrriedv of insulating material and. to which is secured the series of segmental me' tallic contacts engaged by the spring pressed u lingersk 17, 18, 1 9, 20 and 21, 22, 23, on the. ann 16 of the controller. '.lhefinsuloting material -forming the annularface 64 of' the controller (see Fig. 7) is provided with a series of metallic contacts 65, 66,y 67, 68, 69, 70, and 7l, 72,73, '74, 75 and-76 which are' arranged in two sets, one `vfor the upward and one for the downward movement of the skip car or bucket upon the skip hoist and are engaged by the' spring pressed lingers on the swinging controller arm 16. (Wlhena double skip is employed,I the two sets of contacts will, in effect, operate each to control the -upward movement of one skip car or y vered while the other is being lifted.)

sxcket, asin such `case one skip car will be '.i ",Referringnow to Fig.' 7 which shows,

ildiagrammatically, the motor, switchboard,

@eared controller `8, safety ,cut-out'4 andv nperators switch .5, the numeral-7 7 designatos the manually operated kknife-switch by which the positive and negativeline conductors 78 and 79 leading from the power house or` generator are connected to the. switchboar 'i A removable safety nlug 80 Ais provided which is in circuit with the knife switclb which connects the 4cont-rol circuit to` the negative conductor 79 oli the main circuit, and m'dinarily the plug remains in position until such time as it is desired to inspect or f repair the skip hoist mechanism. In such? cases, the` removal of the safety plug prevents possibility of the apparatus being started through the medium of theiopera# tors switch 5 and possible ,injury to the perposition.

son or persons working on the apparatus."

Provision 1s made for locking the plug out with a'padlock.

The circuitof the hoist motor, the armature winding of which is indicated at 92, comprises overload relays 8l and 82 having hinged contact members 83 and 84, respectively, which control the supply of current to the motor'in a manner to be later described.` The relays 81 and 82 are provided with any suitable or usual trigger mechanism' (not shown) to retain them in an open The trigger mechanism is controlled by reset coils 8,5 and 86 which, when energized, operate in a well known manner to `permit theclosing of the relays. The reset coils and 86 are controlled by the operators switch 5and are arranged to be energized only'when the switch handle is in its ed position. c k i Reversing switches 87, 8,8, 89and, 90lare arranged in pairs and are mechanically conneeted in order that each .pa-ir may be actu ated by a singlemagnet coil.` The respective 4,

pairs of switches are mechanically intcrlockedby a pivoted lever 91 to insure that only one pair of switches may be closed at one time.

A sectional starting resister 99, which is in series relation with the motor armature' winding 92, is controlled by an electromagneticl switch 103 and series lockout switches 104, 105 and 106 which operate successively to shunt sections of the resister. The magnet coil of switch 103 is controlled 'by a series lockout relay 100.

A resister 93, which is employed for dynamicbrakingand is adapted to be connected in shunt relation to the motor armature by normally closed switches 94 and 95, is controlled by electromagnetic switches A96 and 97. The switch` 96 is controlled by a series lockout relay 98 which is adjusted to operate when the current is. below a rela tively .low predetermined value. The switch 97 is controlled by thelautomatio controller lose almost at the end.

the relay 107, operatesto cutout or shortcircuit the series ield .101 and thus connect the'armature 92 directly to the negative line conductor 79 of the main circuit through the, circuit breaker'102.

The operating coils of the circuit breaker 102" and of the reversing switches 87.-'-88 or 89-90 which operate in pairs are connected through the contactsS and 84 of the over# load relays 81 and 82, tliekcontact 1090i" the shunt field protectiverelay .113, the slack rope switches 110 andzlll," and the safety plug 80 to the negative line conductor 7 9, so that opening of any one offthese will render the .circuit breaker 102 and reversing switches 87-88 or 89-90 inoperative, causing them to drop out and open the main circuit, the further operation of these switches being made impossible until thecontrol circuit through the `coils tliereoitL is aOairi closed or completed. :a

The shunt field 112 of the motor is connected to the line conductors 78 and 79 of the inaiii circuit through the coil of a .shunt field protective relay 113 so thatpt is always energized when the main knife switch 77 is-closed, as is also the coil of the shunt field protective relay 113. In

ycase of an open circuit in the shunt field 112, the shunt field protective relay 113 will become denergized, and its contact 109 will open the control-circuit through the operating coils of the circuit breaker 102 and the reversing switches 87-88 or 89-90 and cause the circuit breaker 102 and reversing switches 87-88 or 89u90y to open the mainv circuit. v

A magnetic brake 114, which eoacts with any suitable member of the apparatus is arranged to set by gravity whenv its magnet coil is not energized. The circuit of the brake magnet coil is controlled by m'agnetic switches 115 and 116 so that when the switches are closed the brake is released. The operating coils of the switches 115 and 116 are in turn controlled by an auxiliary contact on the circuit breaker 102 'and the upper auxiliary contacts on the reversing switches 87 or S9, so that wheny 4the circuit breaker 102 and a pair of the reversing; switches 8788 or 89-90 close, the brake 114 is released, and when eithei' of these switches opens, the switches 115 and 116 open and allow the brake 114 to set, and assist in stopping the motor.

As shown in Fig. 7, the operators switch 5 has an operating lever 117 provided With two contacts 118 and 119, and has a series of stationary `contacts 120 and 121 which aro arranged to be connected together by the contact 118 and like contacts 122 and 123 arrangei'l to be connected together by the contact 110 when the switch lever 117 is thrown into the up or hoisting position. This switch 5 is 'also piovidedgvith stationary contacts 12eand 125 positioned to be engaged by the lever contact/.118, and contai-.ts 120 and 1227 positioned to beuengaged b v the lover Contact 119 when the switch lever 117 is thrown into the down position, or position to reverso the direction of the inotor and drums from the case just referred to above. In addition there are tivo stationary contacts 128 and 129 on the operatoi"s switch 5, that are positioned t0 be connected bv the Contact 118 when the levei' 117 is iii the vertical position shown,

so as to cause there'set coils 85land 86 of the overload lrelays 81l and 82 to. be energized and reset they overload relays in the manner described-above, after these relays have been tripped by a predetermined excessive value of current through the main circuit.

The automatic geared controller 3 is provided with stationary contacts 65, 66, 67, 68, 69 and 70 connected together at difterent positions of the movable arm 16- b the electrically connected Contact fingers 1 18, 19 and 20, (which are conveniently shown in the diagrammatic representation as a single, long, solid Contact) are provided to' operate the magnetic switches in proper order when the hoist is run in the other direction.`

The quick-break switch'46 is connected to the contact 69 ofthe geared controller 3 and the quick-break switch 47 yto the contact 75, these switches opening the controlcircuit to the magnetic switches at the end of the travel of the hoist. l

The safety cut-out 4, which is connected between the geared controller 3 andy the switchboard, is also provided with stationairy contacts 130, 131 and 132, 133, the pairs of contacts being arranged to be connected to complete the control circuit for the revereineswitches 87, 88, 89 and 90 and the circuit breaker 102 by engagement of the contacts 134-and 135 on the mechanically 'Iii operated :11111136 forming part of the safety cut-out 4.

The arm 136 on the safety cutout 4 is fixed to the U-shaped bracket 137, which is counteriveighted to normally move land yieldingly hold the arm 136.in its vertical position. The bracket 137 is pivotally mounted on a shaft 138 which is rotatably mounted in bearings on the side of the pedestal bearing 7. The inner end of the shaft 138 has a spur gear 139 keyed thereto meshinar with and actuated bythe spur pinion 140 on the stub shaft 140 which projects from the side of the pedestal bearing 7. Also mounted on the shaft 140 andfrotated by the gear 140 is a spur gear 141 meshing with and driven by the spur gear l42'keyed on the drum shaft 6 between the end of the drum 2 and adjacent end of the shaft bearingir 7. (See Figs. 1 and 9).

The shaft 13S has a screw-threaded porico 1,175,1sou 5,

tion of the shaft 138, one on eachside of the nut 143 are clamped in position thereon so as to .rotate with the screw 13S. The nuts 1441 and 1115 engage with the nut 143 and, through the U-shaped bracket` 137 connected to the nut 143, rock the nut andthe bracket 137 and thearm 16 on the safety cut-out, which is connectede'to the bracket 137 A to operate the arm 16 and move it from its vertically depending position at the end of each hoisting and loweringoperation of theskip.` The gears 139, 140, 141 and 142 a're of such size as-will rotate the screw threaded portion 138? `of the shaft 138 so as to move the nut 14,3 lengthwise on the shaft 1B i and cause it to engage with one or another ofithe nuts 141 and 115, depending ou the direction oi? vmovement of the skip, to operate the arm 16' o'l the safety- .cutmut .-l. The distance between the nuts 14,14 and 145 is adji'lsted bynnclamping and moving these nuts on vthe shaft 13S for the rer'iuired amount, which differs with variations in the height olf the skip hoist or, what is `the same thing, the length of travel ot' the ship car.

The operation of a skip hoist equipped with my improved .operating and controlling mechanism will now be described: It is assumed that in starting the apparatus in operation the skip car orfbuclret of the hoist is positioned at the bottom of the skip track. (With a double skip, one skip car will always be located atthe bottom when the other is at .the top of the skip hoist track.) The switches all being thrown into open position, except mechanically closed switches 94 Aand 95, and overload relays 88 and di` and the swinging arm o r lever 117 of the operators switch 5 being positioned in the vertical or oli" position as at C in Fign 7, the Swinging arm 16 of the automatic, mechanically actuated, geared controller 3 is held in position A by' engagement ol? the lug 27 on tl'iewheel with the lug 2S on the spur gear 12} and the arm 34 is held in the raised position shown in Fig. 6 by engagement oi' the lue; Won the wheel 25 with the lug 32 ot' the weighted arm 34, and the mechanism connecting `the rope drum shaft 6 with the safety cutsout lis adjusted uiltil the swinging; arm 136 of the cut-out is inposition at B, Fig. 7. Thcsai'ety plugrSO .is then inserted in place and the main switch 77 is closed. The shunt field winding 112 is energized -by a circuit extending from the i-)ositivc side of switch 77 through the coil otoverload relayl 81, conductor 14.6, coil oi', relay 113 and shunt field winding 112V to the negative side of the line. The

coill et' relay 11,3 is thus energized to cause switch member 1,09 to bridge `its coacting contact members. The reset coils 85 andi 86 ot' the overload yrelays 81 and 82 are en4 ergized by a circuit extending from the positive side of the switch 77 through conductor 147, contact members 124, 128, 118

`and 129 olf ope'rator`-sl switch 5, conductor 148 and coils 85 and S6 in parallel to the negative side of the line. The lever 117 ot' the Operators switch 5 is then actuated tov the upl position indicated by C* to conf neet contact members 12()m and 122 tol contact members 121 and 123. The control. cir cuits comprising these contact members are thuscompleted-through the controller 3 and the safety cut-out 1. A circuit is completed which extends vfrom the positive side of switch 77 through the conductor 117, contact members 1241, 120, 11S and `121 of switch 5, contact member 67 of controller 3, contact members 132, 135 and 133 of cutout h@conductor 150, auxiliary contact member 151, coil o t' reversing switches 87 and r88, conductor 152, coil ot' switch 102, contact members 81 and S3, switch member 109, slack-rope switches 110 and 111, con` ductorkll) and safety plu!r 80 to ther negative side of the line. reversing switches 87 and S8 are closed by the energization of, the circuit just de-y scribed. Current then traverses a circuit extending from the positive conductor 78 through. the switch 77, the coils ol" relays 81 and 98, reversing' switch S7, armature winding 92, reversing switch j8,.relay 100, resister 1)1), series field winding 161, switch 102 and loverload relay 82 to the negative side ofl the line. rSimultaneously with the closing of the switches 87 and 88, an auX- iliary contact member 153 on the switch 87 closes a circuit ior the coils of switches 1.15 and 116 whichextends from thc switch S7, which is connected to the positive side of the line above described, through con.- tact` member y15S-l, conductor 154, coils' of switches 115 andv116 in parallel, conductor .155, auxiliary contact member 156 ot switch 102, contact members Si and 823, lswitch member 1.01), switches 11() and111, conducterminal.` The switches 115 and 116r then close to complete, thecircuit of the coil oi* the electroina,( gnctic` brake lli i which is thereupon releasedto permit the rotation of the mieter shalt. A circuit i;4 also completed from the positive teri'ninal of switch The switch 16., and i l ltor 149 and salfetyplug 80 to the negative iis I 77 through,conductor 1-l7, contact members i 124, '12,()` 118k andv 121 of switch 5, .contact members 67, 17 and 680i controller 3, contact ircinbers 123,11), 122' and 126 of switch 5, conductor 157, coil of dynamic braking switch 94, conductor 158, contact member 156, switchmembers 84; and 83, switch memi ber 109, switches and 111,' conductor 149 and safety plug 8O to the negative terminal of switch 77. Thecoilci dynamic braking' switch' 9,5 is alsoconnected to the positive sidelof `the 4line through rthe auxiliary contact member 159i which.fistnowr liiritsposition corresponding to theclosed position of switch 88. The dynamic braking switches are accordingly opened Vto remove a shunt` circuit for the motor'armature which in'- cludes the dynamic braking resister 93. The

. motor then Starts and is accelerated automatically' by the successive operationof relay 100 and switches 103, 104, u115 andl06. When the current through the coil f lockout relay 100 fallsbelow a predetermined switch 103 then closes to shunt a section of 33 ,ing

thelresiste'r 99. The closing ofv switch 103 completesthe circuit cf thecoil of series lockout switch 104 and the latter operates to short circuit` a second section of the resister 99 when the current falls below a redetermined value. The switches 105 an 106 operate in a similar manner to complete a short circuit for the resister. rslhe switch 106 closes the circuit of the coil of relay 107 which, in turn, operates to close the circuit ofthe 'magnet coil of switch 108. 4The latter then' short circuits the series eld wind- After the motor-is started, ,its continued movement causes the rope drum 2 to rotate so ,as to Wind the hoist rope upon the drum 2, andthe movement of the drum shaft 6 transmitted through the gears and connect# ing mechanism to the arm 16 of the geared controller 3, permits the arm 16 to be moved by the wei hted arm 34 which is engaged with the w eel 25, until the arm 16 is in its horizontal position as at A1. 1' (Fig. 7.) This arm.16 is then held in such position by the weighted arms 33-and 34, until by continued operation of the drums thev weighted arm 33 is engaged and moved by the lug 29 on .the slow y rotating wheel 25, which is actuated by rotation of the rope drums and drum shaft 6 in the shaft bearings 7. At the same time that the' arm -16 of the geared controller 3 begins to move from its position A, the connecting gearing releases and-permitsthe swinging arm 136 onthe safety cut-out 4 to fall or swing by gravity, until in the operative position B1, in which position the arm 136 remains until just after the arm 16 of the geared controller v3 has passed its position A3. (Fig. 7.)

When the ski car reach a 'predetermined point in alblast furnace oist, usually about l5 feet fromwthe limit of`trayel, the

v switches, which movexn lug 26 on the wheel 25 is engaged by the lug 28 on the gear 12, which causes the shaIt 13 to recontinue its rotative movement and carry with it the arm 1 6 of the controller 3, the lug 29 of the wheel 25 engaging with lug 31 on the arm 33 and causing the arm 33 also to rotate on `the shaft 13, and when the arm 16 reaches the position A2, the control circuit through the coils of the mechanically closed switches 94y and 95 is opened, allowing these switches to close and placing the shunt through the resistance 93 around the armature '92. At

the same time the vclosing motion, of the" switches 94 and 95, through their auxiliary contacts 160 and 161, opens the control circuit through the coils of the switches 103 and 108, which drcp open and cause all of the startingresistance 99 and the series field 101 to be again inserted in series with the armature 92. As the motor and drums continue to rotate, but at a very much slower rate, the armature .shunt through resistance 93 is automatically decreased in two steps, one under the control of the'shunt switch 96 which is actuated by the lock-out relay- 98, and the second step-.by the switch 97 which is actuated through the contact 70 of the geared controller 3 'when the arm 16 reaches its position A4, this movement reducing the rotation of the motor to a very slow or creeping speed, which continues until, when ther arm 16 reaches its-position A, the quick-break switch 46 is opened by engagement of the `cap-bolt 58 on the arm 33 with the lug 56 as has been described, opening the control circuit through the op eratin coils of the reversing switches 87, 88 an the circuitbreaker 102. so as to disconnect the motor' from the line, and o en the control circuit through the coils of the switches and 116, so as to permit the shunt brake 114 to set.

The brake 114 1s assisted in stopping lthe motor by dynamic braking on,v the shunt 'field 112, which effect is obtained as long as the motor is rotating by reason of the vfact that the mechanically 'closed switches 94 and 95 maintain the shunt around the armature 92.

The arm-136 of the safctycut-out 4 must be set to operate just after the controller warm 1G has passed the position A3. Should,

for any reason, the controller 3 be inoperative, the'safety cut-out 4 will open the control circuitthrough the operatin coils of the reversing switches 87, 88 and t e circuit breaker 102, and cause these switches and the circuit breaker tojopen and disconnect the motor from the line, set the shunt brake,

and to set and at the same time denergize the coils ofthe mechanically closed switches 94 and 95 so as to release and close these t places the slinnt f swedynanis around the -armv'atr' iso the contact (3S) on the controller 3, While the arm lo is traveling from its position A3 to position A?. l i

ln operating the hoist to lower the lifted skip car, the operator simply reversesthe o] crator`s'switch 5 andthe above described c vcle is repeated, the only diiierence being tlial the opposite end of the controller arm 1o and the opposite side of the controller 3 and lsal'i.t vcut-out i become effective.

The motor may be stopped at any point in the travel by bringing the lever 117 of the operato|"s switch 5 into position C, (or the oli' position) this position of the arm disconnecting the motor from the line and permitting the mechanically closed switches 9G and J7 to close, and causing dynamic bralc` ing on the shunt 'ield 112 which assists the shunt brake. '.lhe motor may be again starlcd in either direction by moving the .lever 1.17 oi' operator-s switch 5 to the proper position. i

llu the `event ol' an overload, or shoulda ground occur on either sideof the line, the overload relays 8l and 82 will open the circuit breaker 102 and the reversing switches HT. HH, and the shunt brake 1.1/1 will set, dynamic braking on the shunt iield being obtained in the same manner as has just been described. hllovement ot the operators switch lever '.l i7 to the oil' position at C will then cause resetting ot the overload relays. Should the shunt lield circuit open, the shunt lield relay 113 will openthe control circuit through .its contact 109 ycausing' the circuit breaker 102 and the reversing switches 87, SSto open the main circuit and the shunt brake 111i will set. The Ashunt field is maintained continuously aslong as the loii'l'e switch T7 is closed so as to insure at l all tiinesdynaniic braking of the motor. As the circuit breaker 102 is opened simultaneously with' the reversing switches 87, 88 or SS). 90, additional safety is ,aiiiordedr in case one ci the switches should stick and fail to open.

'ilieadvantages of my invention will be apparent to those, skilled in the art.

` .means of my improved mechanically ope'- atod emit-roller and mechanically operated` satety cnt-out' the heist operations are performed without the necessity of regulation of the hoisting speed by the operator. The electric connections to the controllerV and cut-out and the mechanical connection between the controller and cut-:outvvith the hoisting drum cause the" motor to start slowly `and travel at a gradually accelerating speed through the desired part of theI R travel of the skip car, to travel at a maxi-"l mum speed for the desired part ot the travel, and to gradually slow down and tocoine to a stop ,at the desired point. I

The arrangement ot' magnetic and mechanically closed switches and relays shown prevents the possibility of damage by reason of failure .of current supply or of breakage to the hoist operating mechanism. y

Modifications in the construction and arrangement of the parts may be madewithout departing from my invention.

I claim: 1. In a hoist operating and* controllingv system, a controller electrically connected to regulate and control the operation of the hoistmotor and comprising a swingingconshaft operating member, means actuated by the vhoist driving mechanism for intermit tently turning said member and adjustable means connecting `the member turning means and stil member *whereby angularturning movement of the member turning means relative to that of the member is aried In a hoist operating and controlling systenna 'controller electrically connected to regulate and control the operationof the hoist motor and comprising swinging contactanm, a shaft for turning the arm, a shaft operatingl member, means actuated by lhehoist driving mechanism for intermittently turning the said member, and a swinging arm arranged toengagethe said member and therebv hold the contact arm stationary during portions of the movement o1l the member turning means.r A.

4L. In a hoist operating and controlling system.l a controller electrically connected to regulate and control the operation` of the hoist motor and conmrising a swingingcontact arm,y a shaft for turning `the arm, a

shaft operating member, means actuated by 4limit the movement oil" the swinging arm in one direction. l. l -l p 4f5. In ay hoist operating and controlling system, 'a controller lelectrically, connected to regulate and controlthe operation ot the hoist motor and comp'isingua.swinging con tant arm, a Shait 0.;,11I`Il1ll'g.- l

means actuated by shaft operating member,

hoist driving mechanism for mterm1tthe tently turning said member and a plurality of swinging arms arranged member and thereby hold the contact arm stationary during portions of the movement of the member turning means.

6. ina 'hoist Operating and controlling system, a controller electrically connected to regulate and control the operation of the hoist motor and comprising a swinging contact arm, a shaft for turning the arm, a

shaft operating member, means actuated by the 'hoist driving ,mechanism for intermittently turning said member, a plurality of swinging Weighted arms arranged to engage said member and thereby hold the contact arm statonar y during portions of the movetact arm, a shaft for turning ment of the member turning ln'1eans,`a1d va stop to limit the Vmovement of ailms in one direction. Y ,y 7. In a hoist operating and controlling s stem, a controller electrically connected to regulate and control the opera ion of the hoist motor and comprising a sw iging conhe arm, a shaft operating member, means ctuated by the' hoist driving mechanism for intermittently turning said member, a swinging arm Y arrangedyto engage said member and thereby lh old theeontact arm stationary during portions of the movement of the member turningmeans, and adjustable means connecting the arni'andsaid member whereby the relative angular movement of said arm and said member is varied.

8.111 a hoist operating and controlling system, a controller electrically connected 'to regulate and control the operation of the hoist motor and comprising a swinging cony tact arm, a shaft for turning the arm, a shaft operating hoist driving mechanism for intermittently turning said 'member, a plurality of swinging Weighted arms arranged-to engage said member ,and thereby hold the contact arm stationaryl during portions ofthe movement of said member turning means, and adjust` able means connecting the weighted arms and said member whereby `relative angular movement of the arms andY said member -1s varied. Y 3" 9. In a hoist operating and controlling system, a controller electrically connected to regulate and control the operation of'the hoist motor and comprising a swinging contact arm, a controller havingaplurality of contacts engaged by the contacts on the contact arm, a shaft for turning the contact arm, a shaft operating member, a spur gear having means en aging with and 1ntermittently rotating sind member, said gear being operatively .connected to and actuated by the hoist driving motor, a Weighted arm arm-shaft and arranged to to engage said i" the swingingmember, means actuated by the mounted on and turning with' the almeno switch electrically connected to the motor tcontrol circuit and arranged to be opened by said swinging arm in predetermined positions ofsaid arm.

w 10. In a hoist operating and controlling system, a controller electrically connected to regulate and control the operation of thelioist motor and comprising a swinging contact arm, a controller having a plurality of contacts engaged by the contacts on the contact arm, a shaft for turning the contact arm, a shaft operating member, a spur gear having means engaging with und intermittently rotating said member, said gear being operatively connected to and actuated by the hoist driving motor, a swinging arm pivoted on the arm shaft and arranged to be lifted by said member, a quick break switch, a compound lever for opening lsaid switch, and means on the counterweight arm to engage said levers and open said switch.

11. In a hoist operating and controlling system, a controller electrically connected to regulate and control the operation of the hoist motor and comprising a swinging contact arm, a controllerhaving aplurality of contacts engaged by the contacts bn the contactarm, a shaft forturning the contact arm', a shaft operating member, a spur gear having means engaging with and intermittently rotating said member, said gear being operatively connected to and 'actuated bythe hoist driving motor, a swinging arm pivoted on the arm shaft and arranged to-be lifted by said' member, a quick break switch, a

12. In a hoist operating and ,controllingl system, a controller electrically connected to regulatey and control the operation of the hoist motor andcomprising a shaft having a controller arm fixed thereon, contacts on said arm'engaging the series of segmental contacts on the controller face, a wheel shaft, a spur gear rotatable on the arm shaft 'having means intermittently engaging with and turning the wheel and shaft, means for turning said spur gear, and a 4swinging arm pivoted on the shaft and arranged vto be lifted by said wheel, and to hold the controller arm 'stationary during portions of the wheel turningmovements.

13. In a hoist operating and controllingV system, a controller electrically-connected to regulate andcontrol the operation of the hoist motor and comprising a shaft having a controller arm'tixed thereon, contacts on said arm engaging the series of segmental -contacts on tliecontrbller face, a Wheel mounted onandsturning with the shaft, a

spur gear rotatable on the arm shaft having means intermittently engaging with and4 turning the wheel and shaft, means for turning said spur gear, and a pair of oppositely 'extending swinging counterweight arms pivoted on the controller arm'shaft and arranged to be lifted by said quadrant, and co-acting to hold the controller arm stationary during portions of the wheel turning' movement.

v 14. In a hoist operating and controlling system, a controller electrically connected to regulate and control the operation of theA hoist motor and comprising a shaft having a cont-roller arm fixed thereon, contacts on said arm engaging the series of segmental contacts on the controller face, a wheel mounted on and turning with the shaft, a. spur gear rotatable on'the arm shaft having means` intermittently engaging with and,

turing the wheel and shaft, means for turning said spur gear, and a pair of oppositely extending swinging arms pivoted on the controller arm sha-ft and arranged to'alternately engage with and be lifted by said #wheel and co-acting to hold the controller arm stationary during portions of the wheel turning movement, y

15. In `a hoist operating andcontrolling system, a controller electrically connected to regulate and control the operation of the hoist motor and comprising a shaft having a controller arm fixed thereon, contacts on -said arm engaging the kseries of segmental contacts on the controller face, a wheel mounted on and turning with theshaft, a spur gear rotatable on the arm shaft having means intermittently engaging with and turning the wheel and shalt, means for turning said spur gear, a swinging arm pivoted on the' shaft and arranged to be lifted by said wheel', and to hold the controller m stationary during portions of the'wheel turning movements, and adjusting means bletween the arm and wheel wherebythe 2'lifting movement of the arm by the quadrant is varied. l

I 16. In a hoist operating and controlling system, a controller electrically connected to regulate and control the operation of the hoist motor and comprising a shaft having a controller arm fixed thereon, contacts kon contacts on the controller face, a. `wheel mounted on and turning with the shaft, a spur gear rotatable on the arm shaft having means intermittently engaging with and turning the wheel and shaft, means for turning said spur gear, andA adjusting means between `the spur gear and wheel whereby the turning movement of Athe wheel hy the spur gear is varied.

17. In ay hoist operating and controlling mechanism, a controller comprising a shaft having a controller arm mounted thereon, a wheel secured on said shaft to rotate therewith, agear wheel having means engaging' with and rotating said wheel, swinging weighted arms loosely mounted on said shaft karranged to engage with and move the wheel and shaft to swing and hold the controller arm, and quick-break switches 4gage with and be moved to disengage the disk and pins land open the switch by conqtact with the engaging swinging arm.

18. In a hoist operating and controlling mechanism, an electric controller compris-v ing a face having segmental contacts thereon, a swinging arm having contact fingers operatively engaging the segmental contacts, a shaft on which said arm is mounted to rotate therewith, a gear wheel rotatably mounted on the shaft, a' wheel secured on and rotating said shaft having means engaging with and turning said shaft and controller arm thereon, said gear wheel and `said wheel having coacting means whereby the wheel is moved by the gear wheel, and oppositely yextending counterweighted arms engaging with and yieldingly holding said .wheel and arm against movement while said rotary movement.

gear wheel is moving through part of its In, testimony whereof I have hereuntoset y my hand.

' EUGENE FRIEDLAENDER. Witnesses: A.G. LIMBAGHEB,

JAMES SCHWEINBERG.

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