US1829873A - Aerial haulage or cable-way mechanism - Google Patents

Description

Nov. 3, 1931. F. w. REILLY ET AL ,8

AERIAL HAULAGE OR CABLE WAY MECHANISM Filed March 5, 1950 2 Sheets-Sheet 1 R INVENTOR Ffaunk \A/zmd Rel? 5 BY Ddvnanr Q. Shea ma. E g

' ATTORNE;

Nov. 3, 1931. F. w. REILLY ET AL 1,329,873

AERIAL HAULAGE OR CABLE WAY MECHANISM Filed March 5, 1930 2 Sheets-Sheet 2 INVENTORS Fran k \A/an'd Rd H ATTORNEY Patented Nov. 3,1931 I HEA A I ORA'IIYON or PEnnsgnvAmA 7 [Our invention relates to, aerial tramways or abl ways, t princ p Purp e- S1 t provide a .new, simplified and greatly tim proved. mechanismlor arrangement for; w proper control and support vof the hoislpon:

fal il'r p n e o in.

a To thisendithe priiicipalfeature ofthe its physical embodiment .con-

V sists in airope or cable directed or traveling in c ence a support ofr' carrier; line for the hoist onfall' rope. :The hoist rope-and support acontinuous circuit and called for convene V rope :both pass over at'lea-st two'doublefgrip sheaves, one located on the head tower and the otherion the carriage, sothat both ropes V b will simultaneously "drive, or be driven by 1 the respectiye sheaves with the result that in effect the weight ofthe -fall1rope'between the carriage and thehfead tower is counterbalancedor, as otherwisefstated, any tendency to 'movefeitherfrope or-eitherdquble grip :sheavein either directionlis accompanied by anlequal tendency to move theother rope in 1 thesamelldirection withthe resultthat slack in the fall rope,:greater than any predeter-c mined, necessary or desirable amount, is pre- I" rented, and the fall hlockmay bepositively loweredwith no or 'a light load, even when I the carriage isat the maximum distance from the head tower (or at any. intermediate dis tance); 1 s l lVithoutmeans' for supportlng the. hoist line, when the carriageis at a considerable I distance from the head tower the line will sag down between the carriage andthe head tower unless there 1s, a considerable load sus I pended from the fall block hook; Converse- ,el down ofits own accord because of the pull tower.

lywhenthe fall block is lightiit-will not travin the hoist ropecaused its spanning the distance between the carriage vand the head In accordancelwith:previous'practicdin most cableways oflany cons derable length ,the hoist lineand frequentlyother lines are supported betweenthe carriage and the head tower vby means of smallfidlers which rest on thetraclr' cable and areequipped with small wheels-"for the support of the hoist line. h e ler 9 a uallyl. ;all d, .f 1l r p .vals still another system the carriersare -arranged "to travel on the track cable and: are

one-quarter, one at maintain a somewhat re I rmnsgw nasmnzioee nmmceen rnnnnssnn, AND DELI/[AR cpsnnnimimor i nimoisyhsaenb'To wrnninmsronr'wmnnorn COMPANY; noon: 4 c

" Y AEni'AL HAU AGE-on cAnnn-wnvmncnrnmsmt Application-filed Marcus, 1930. "seen no; 433,278.

carriers, areldistributed at intervals'as the i '7 carrige travels outward from the head tower,byvarioiis devices. In one arrange ment the separate fall rope carriersare' connected together by pieces of chain 1 When the carrier] isad acent the tail. tower; the

chains are all taut; when the c'arrier is adj a; cent the head tower the carriers are brought close togetherand the chains hang down.

This system or arrangement is objectionable 3 becauseof thechains hangingdown-into the Workingarea, or swinging and 'tangling toetheras "the -carriage moves outs-from the head t mer. ,In another arrangement the carriers,v are, distributed by aro'pe placed above" the track cableiand fitted with steel buttons ofvarying sizes spaced at regular intervals; each carrier has "an eye. of suitable sizeto engage a'particular button and is removed from its attachmentto-the carriage by contact with'this buttoni'; In another sys tern the mechanism" attach d, to the carriage and ,driven by one of the track sheaves mechanically depositsthe carriers at inter.-

I riven at varionsspeeds by one of the. run- I ning lines. Thus, one carriage; may run at one-half and one at threeot the carriage and thus 'gular spacing. I

, All'of the above mentioned arrangements quarters the speed involve-a multiplicity of small parts and su-pport or carrier line running over double sheaves which also carry. the fall rope, as

above stated, in effect balances the pull on the hoistline caused by the span between the can 1 riage andthe head tower, andeliminates this resistance to the'free downward movement of the fall block. Thus, the pull on the hoist line caused by the span between the carriage and theihad'to'wer is-resisted by the carrier line andonly'results in corresponding pull in the carrier line instead of restraining the free movement ofthe fall block. By the balancing-,efiect also, any sag-in the fallrope beyond a desired or predetermined amount is prevented in all positions of the carriage.

Additional important features.- of the in-g vention'include construction or arrangement of the double sheaves to'liave the same contact or grip on thesupport line as on thehoist line {or conversely, so that pull on either. line is'communicatedwith equal force. to the'other y' he h v s-fi 1 Us practi allynecessary in 'c'aloleways and other wire rope drives, in many cases, in order to increasethe. amount of transmitted from a wheelfto arope or vice versa, to provide mechanism on the Wheel or sheave. Thecfomrnon form of grip wheel contains jawsset in recesses'around the wheel rim. 7 The radial-pressure ofthef rope acting against the aws, whichare connected in the form '1 of toggles, multiples the pressure j'exerted'against the rope and has the" same 'efie'ct as increasing the coefiicient of I friction. V The grip wheels employed on an I aerial tramwayare usually of'largediameter,

" W hile'in' the broad "anditispraticableto I finlthes r'large wheels. It is not desirable to ropes: and the corresponding lsi s gr pr ng jaw employ such large diameter wheelsin the carriage and headworks oiia cablewa y, and it is diflicult or unsatisfactoryto employgripping jawsinwheels of small diameter because it is impracticable to make .thejaws narrow 'enouglrto forinf'a nearly circular contour, and the jaw'typeof gripping wheels is also I more-expensive .to'manufacture'in small jdik ameters, and for other reasons.) 7 1 tion any suitable form of gripping wheel,

or doublegrip sheave for'pos'itive-and equal-' iz ed traction effect onboth the carrierand tall ropes, might be employed, the inventionincludes as a preferred arrangement double groove or grip wheels of novel and improved character employing a'plurality 10f annular rings instead of grip jaws, and

designed to provide ample and equalized traction engagemenuas'between each of two I groove-form ing members, on the wheel. These double wheels or sheavesconforml to several featur'es or design which are of greatimportance, or essential to proper oper ti n ofthe ipresent' fall rope support arrangement or system." It'- is importantor essential that the groove for'the' hoist line and the groove for the carrierline be at the same radius from the I center 1 of the grip I wheel. If variation tractive force er aspect of thei inven- "tem, embodying the, invention in should exist in the radius of thesetwo ropes v it is evident that one will travel faster and farther than the other. This effect would be continuous in the same dire'ctionband would eventually greatly decrease :the stress on one of the ropes and" greatly increasefit nonthe'other. In thepr'esent construction orarrangement ofthe fall r'ope support sheaves, asfully'lexplained in the d'e'tailedv description, provision is made for equal gripping or traction and equalradius at all times of-both ropes on the double sheaves, and by means entirely novel and "distinctfrom the grip j awarrangemcnt. i V To sustain or support the; hoist line with a constant force, eliminate necessity for adjustment inthe includes means for" applying constant tension to the-carrier line. For this purpose the sheave at'the tail tower which supports the bend of the carrierline remote from the head tower, 'isfmounted in -Va' movable cradle or slide, and 1s connected .to a counterweight suspended near or w thin the" "tail tower. "This counterweight places the carrier line under desired uniform or understand that many variations may be made without departing from the principles disclosedand we contemplate the employment Y of any structures that are properly within the scope of the appended-claims.

Fig. l'is a side elevation, largely diagram- 110 inatic, of a cableway' oraerial haulage sysone form; I "Fig. 2 isja side elevation of the carriage andadjacent parts; and Fig. 3 is a diagrammatic,perspective view explaining the course or direction of certain "of theropesorlines; k v 1 I In Fig. 1, 1 is a head tower and '2 the tail tower, supporting the track rope or cable 3,

towers-are guyed or braced in any known or suitable way. The carriage 4 is supported to travel on the track ropeby any known or the ends ,of which I are anchored, and the length of the carrier line to Y 'compensate'for stretching-etc, the inven:

tion also preferably constant tension and thus causes the'hoist suitablewheel'or'truck arrangement such as 5.." .The carriage supports'the ,fa-ll block 6 through the fall or'hoist rope 7 The carriage is traversed between the' tower's by an 'outhaul rope or line 8 connected to the carriage at 9, passing over a' sheave 10011 the tail tower, under guide pulleys'in the car- 1 I rige', over:sheav 12611 the head tower, down" 3 through2the tower andabout sheave or pulley '1'3 't'ofthetraversing or traction drum of the '7 drivingmechanisfl' (-not shown) ,and inhaul' rope for line lemmin directly from" the" carriage to sheave on the head tower then:

down through the tower and guided as by pulley or sheave :16 tohthe' traction drum,

- 01f;pulley-23v to' the hoisting drum. a. WAS; soiardescribed jthe construction 20 th drawings for illustrative convenience,but'. actually the" distance betweenthe towersLmay; T be oftheorder of 1000 or1'150Oorn1orefeet,.

The fall rope maybe; rigged fin therc'arriage inanyl known or suitable'way. A-s showmit iscOnnected tothezblOGk 6 at. 18, runs over;

azsheave 19: in the carriage,- then. around the; fall block 'sheave':20,upward therefrom and V over asheaveQIin thercarria e,"a-nd then "1 and-goverasheave 22 in the head tower and a down through the tower and about af'sheave;

substantia-lly' parallel to the ot erlines, to

arrangement of parts may:v be as usual; I I J hje, towers are "shown close together in and the invention is especially advantageous i -e e where'the e p c g i rel t ely V-Igr'eat,torreasons that willappear, although o e; t.; -not l m e ci u h cases an i I maybe employed withisgnaller. distance of tower; spacing down to; any .reasonable minimums; I

? en 'the distancebetween towersisrelatively great,,when the carriage is run out half -wayor more v oraclose to the tail tower, the weight of theffa-ll rope: between the head tower and the carriage is increased fcorreiieed ng' y a d n e 1 f S i-emi means, and especially, when there 1 is no load or only a light. load on the'fall H hook, the

weight, of the lin isfg'IfQaterthanthat of the fall'bloc k and it l-will sag raise the fall 7, block to the, carriage;ilit is impossible; also in suchicasesto lower .thelblock, since. letting out the fall ropewill result only in increas- 'ing. the length of the depending loop befftween the. head tower and the carriage. To

overcome this iclifiiculty the expedients briefly rearea to early abovehavebeen'iemployed or," proposed,'such 'expedients or means cono v v a number of fall rope carriers-w th means for 'siS'ting principally ,in ithe 'fprovision of a distributing or spa-cingi them and involving 7 the complications and L disadvantages also briefly beforementioned;

I The invention provides new and improved I *ilie i' 'fle s en r ll 'ng or; supp t ng t e f rope between the: carriage" and? the p head swam such m l rf het eee re ee O slack in that stretch of therope is prevented,

i 9 thei diiferenc es inweight applied at, the fall block'fare compensated f0r, and'fall rope car- 'riers of types heretofore: known and their accompanying disadvantages {are eliminated. j

improved means for controllingthe fall rope may be referred td as afzillrope support or Ica-rrier, by -:analogy .to' previously? I known devices in its generalresult or. fund;

tion-,.- that-is,-to sup ortv or. eliminate unde sired ,sa-gin thefall' line, although'in physical,

organization and operative functions: it is entirely different vfrom such previous devices or arrangements, 'and 'ma-y therefore be more correctly referredto asfall rope controlling or compensating means, or more, specifically, wlth reference to, its principal physical'ele-g inent, a fall ropecontrolling or compensating 1ne.- This controlling, compensating-or support: mg hne 30 isdirected andtravelsin a continuous'circuit between the, head 'and;,xtailtowers and through the carriage; Thus,,beginningat the head tower, it, passes aboutan,

idler sheave 31- thereon, up; and over a second,

groove insheave 22 which also has a groove ,for the fall rope-as above stated; then out-' ward and througha second groove in sheave.

.2l in-the carriage which also has a groove for the fall rope as before stated, then down and under a sheave 32 in the carriage, out ward toward the-gtail toweriand abolut a sheave 33 thereon, then inward toward tthe head tower, through the carriage (being' guided'byidler pulleys 34 therein), andso' back to the-head tower and about idler 31, completing-the controllingropecircuit.

The pulleys 21'and 22-are above'referredto as double groove pulleys eafch carrying both the .fall [rope and the controlling or-support line. In the broader aspect of the invention the two'lines at eithergthe tower or the car-' I" riageymay pass over independent pulleysor sheaves mountedonlthefsame shaft and con nected to-rotate' together; but in a preferred arrangement for reasons; sufiiciently stated sheave at identicalspeeds and without slip page. Each ofthe sheave structure's 21"and 22, supporting both -the fall line 'andj the compensating line may therefore in a' more limited aspect be considered to beof the forin .or structure disclosed in said companion ap; plication, but since such v a sheave structure is capable of otherusesgit is not'speciiically claimedwherein except in connectionwith otherfeatures of the present combination.

;In' what is probably the simplest arrange. ment the'fs'tretches of the fallrope and supporting or compensating line between the head 'towerfand' carriage are horizontally paraI1e1 anda-re shown approximately so in Fig; 1', but 'forexplanatory purposes the 'fsill ,1 line- 7 7 is showna's located slightly ab'ove' the adjacent stretch of the compensating' line 30. Fig;- 2 explains. better-thanthe small scale showing of Fig;-1, the locations, coursesor directions of :the various ropes or lines in' adjacent the carriage, and: the perspectivediagram, Fig; 3, still better explains the 1 cations or arrangements of thefall rope and I matjically in -Fig. 3gas each consisting oitwo sheaves connectedto rotate together. This is a compensating line an d' especially'those parts of these'lines which are in the upper part of theihead' tower; andextend between the head 7 tower and the carriage, and also parts of the lines located in ithe carriage and; with re spectto which l'is not so clearly'readable onfaccount of its small scales, The sheave structures 21 and QZarerepresented diagramfor. the sake of illust'rative clearness, since;

although the two sheave arrangement is *feasa ible, the double grip sheaveconstruction or r r gement as.elsewhere described is usually-f preferable.

JVhile, as'above stated, anarrangement in which portions of-the supporting or compeneating line and ofthe fall rope between the head rtowerfand carriage are adjacent and horizontally parallel,fisone of the simplest and most practical-, thi's-is notlessent ial, since the portion of the'Jsup'port or compensatingline-between" the head, tower and carriage niightbe longer than the corresponding pon' tion-of the=fallllrope,- and directed in adiiferent course, so longras the supporting 'liiie is properly" engaged with the: double grip sheaves or their equivalents, runs in 'a continuous circuit and is otherwise arranged to produce the herein; described controlling. or

compensating effect. .t

-In. operation',-iwhen. the carriage. is at any considerable" distance from the head tower, or nearithe tail tower, as represented in Fig,

- '1,Ethelweight of the fall rope between the head tower and carriage is greatly increased, and as" above stated there. is a tendency for it to sag, and with any-ordinary, or light load, or no load onthe fall block'the latter.

would be pulled up to the. carriage This sagging of thefallrope is however, resisted initially: by the compensating" line, since assuming the carriage to be held stationary by its-traversing lines, the tendency to sag will take effect in a tendency to grotate sh-eave' 21 clockwise, as viewed in Fig. 1;; but" this rotary impulse-applied to the sheave is immediately communicated: to the compensating line which. thereupon "tends Y to rotate sheaVeQQ-atthe head tower in the. same directioneandsheave 22 simultaneously applies an equal pull to the fall rope or in other ord's,-the weight of the fall rope and its tendency-to move is substantially compensated andthe weight. of the fall block even with a; light loadfor no load is-sufiicienti to pretent. ging; s t t e. fal aline e ward movement-of the blockii Simil'arly-,'} under stated conditions, -that5 is, with thezcarriage wellout from the head tower ahd no load or alight loadi'on the bloek, if-it is desiredto lower the block} the "fall line .Y is slacked. 'ofi:

at the hoisting drum. Neglecting the; weight of the falliline downward in the head tower from sheaveu22, and the weight of the fall block, there: will evidently be any imin'ediate' tendency of theropeito sag b'etweenLSheaVes 21 and. 22 "with: accompanying -I'OtatlOIllj0f sheave 21 clockwise andsheave 22 counter clockwise ;Y but such rotlation I as positively prevented by thecontrol tline;"3O", and the tall rope cannot sag between the tower and the: carriage to any greater degree-than the'simi ,lar stretch of the-control line. The fall block may then be positivelyloweredso long as its weight a is greater than that .ofjtll'e down stretch ofthe' fall ropev inithe he'ad tower;

A's otherwise described,'the weight of; the

;fall block becomes a positive motiveforce tending to rotate sheave 2l"and' thereup'on the control line between l-that sheave and sheave 22 will positively rotate the E latter andtake up fthe-rd own stretch-Zof;thefifall rope at thesame rate; that it "travels'between sheave 22a-nd sheave2l andover theljatteri 7 It will he-understood that there maybe a normal sag in any or? all of the? lines or ropes due to their weight. whenfprope'rly tensioned, jand inreferring to' elimination of sag or slack it is "only intended to indicatethat there is prevention of such sagging beef yond "a predetermined or normalfainount'; As sufficiently explained ab ove it is; desir able to. maintain constanttension on thesup port or contreningiine 3O, td'compen ate for variable stretching of the ropes", to support the hoist line with constant ;E orce,"to 'fliminate necessity for adjustin'ent "infthe length of i'the compensating line, "etc. For these reasons sheave 3 3, carrying the compensating line at the tailtower, is mounted one; inojvable support v or slide 40 which in the present example arranged to reciprocatein guides t i gh flathew i 1 wh h may be, varied or adj usted ,as 'de'si'red', suspended within thetower onf'a rope 43; 'connected'to slide 40' and guided by sheaves, or pulleys 44 and 45,'the latter beingso located as to provide .amplefoutwa'rd travel of the slide and'sheave 33totake upanyreason ableamount of slack.

9 tion with towers, a trackway, a carriage runin its entirety operates with the-traction Iine and has additional movement withthe fall line whens'raising .or lowering the fall block. Q Whenever the. fall: line is slacked off or: pulled in to lower or raise thebloclgthe compensatinglinemwill travel in the. same dire tionJ and 1 atthe' same speed as the fall rope 7 through the'carriage.Therefisfam ":other method in "which-the end of theifall Qinrope away from theihead'tower isoon'ricted at a fixed point on the tailtowemthe; rope being rove through the carriagesheaves. in

aknown way, as understood inthe-art; The

present" inventionv :.wi1-1" properlycooperate with'either modeofreeving the fall rope, to

v produce the desired; results; above set forth,

as will be 7 understood; by? skilled 'persons without furtherexplanation. is r V We claim n way or theslilre, in eornbina tion with a track.cahle,--a: carriage, carriage traversing means,- a :hoist, rope, 'extending e .7 v,

riage, a fall ropecompensatmg line running to and operated from one endiof the cableway andloadrec'eivingimeans on the hoist rope, a controlling-line movabl'y supported in a continuous circuit and unconnectedlat'erally to r the .hoistrope which i' is free throughout to 1 run divergently from the controlling line, and-means.driv nglyinterconnecting theeon- 1 "trolling line and hoist linezwherebythe coni unloaded.

f 'oount'erbalanc'es"forces acting on: thehoist' trolling linebalanc'es pullion' the free stretch otthe-hoist line, prevents undesired sagging thereof, and effects posi tive descent of the load receiving Ineans when relativelylight or 2 2. "In 'aqcableway or thelike, oornbina ning on the trackway, ah'oist rope running .from one of the towers to the carriage and'a' fa l: block onthehoist rope below the earriage, a hoist rope-compensatinglinesup ported; and guidedin a continuous circuit between. the I towers and adjacent the .carriage, the hoist rope and compensating lineebeing free throughout. for vrelative, separation in I hoisting and lowering otthe fallblock,and i 9 Ineans by v iq p l en mp n line is drivingly connected to the hoist rope and.

ropev between the c arriagef and tower, prevents saggingofthefiall rope beyond a pre; determined 'aniount" and'perrnits descent of the fall' block when 1 relatively or un loaded. 1' 3. In a ca'bleway orthelike, in combine tion with towers, a track cable: betweenithe i j towers,af earriagerunning o'rrthe cable, car-5 riage traversing mang ihoist rope r unning g 'from-Lone, of the towers tothe carriageand a fall 'blooko'n'fitlie" hoist rope below the parriage,' a hoist rope'bompensating line sup- }ported and? guided 'a 1 continuous circuit between. thei'towers'rand passing through the carriage, the hoistrrope and compensatlng 5 line being substantially adj acen't, :paralle and unconnected to each other from-the block to the tower at the operating end of the cables way-,: and means by which the compensating line; is interconnected with the hoist rope in When the carriage 'isqsof positioned that the 7 free stretch of the'hOistrope is relatively ong. W T T 4. iAnaer'ial haulage system eomprisinga head tower, a tailTtower, a trao'kway between the towers, a carriage running on thetrackway, a, sheave 'structure'in the head tower don:

I sistinglsubstantially otialdouble groove sheave, another substantially similarsheave structurein the carriage, a fallv rope running through one'groove of each of: said'sheaves and a fall block on the fallropebelowthe-car? in the? other grooves of said sheaves, and additional means supportin "the compensating line in a continuous circuit-between the tow "ers, whereby forcesacting on the fall rope between the. head ptower'and 'carria'gel are compensated, sagging is prevented and posi tive descent of the" fall block is effected with light or no load, 5: An aerial haulagesysteni comprising-a head tower, a tail tower, a tra ckway between the'tow'ers, a carriage running on the'track- Way, a" sheave structure'in the headtower consistingsubstantially of double groove sheave, another substantially similar sheave structure in the carriage, a fall rope running through one groove of each of'said' sheaves and afall' block on the-fall rope below the carriage, a fall rope compensating line running in the other grooves of said'sheaves, an

idler-sheave'on the tail' tower, the compensatingInIeJrunning also aboutthe idler sheave and beingd reoted in a continuous eireuit be"- tween theitowers and through the carria e,

; whereby forces acting'on the fall' rope e tween-thehead tower and carriage are bonipensated, sagging-is prevented and positive descent of the -fa1l block with light oreino load'i's efiectedf 5 I x '6. Afnsaerialhaulagesystein comprising a head-tower, a tail tower, a traclrway between "the towers, a carriage running on theftraekway, a double grip groovesheave in theh'ead tower, a double" grip groove sheave in the carriage fall rope running through the tower and' from the tower to the oarriage'and "engaged ijnone ofthe grip; grooves of each of the said double grip groove sheavesja. fall block-on thefall rope below the carriage, an idler'sheave thetail tower, and a fan rope the towers. a Y

compensating line running through the other "grooves ofsaid double grip-groove sheaves 3 and :over the idler sheave in ithettail-itower' and directed in a continuous circuit between '7.]A11 aerial haulage system comprising a head; tower, a tail tower, a trackway between V the towers, a carriage running on "the track- I way-,a double grip groove sheave in the head tower, a double grip'groove sheave in the carriage, a fall; rope running through the tower and from the tower to the carriage and engaged-in one ofthe grip grooves of each ofv the said double grip groove sheaves, a fall 7. i block on the f'all'rope-below the carriage, an

idler sheave in the tail tower, a fall rope compensating line running through the other grooves of said double grip groove sheaves and over'th'e idlerjsheave in the-tail tower 1 and directed in a continuous circuit between thetowers, Land means for tensioning the compensating.line.v

8; aerial haulage system comprising a head tower, 'a"tailtow er, a trackway between the towers,a carriage runnihgorithe track- .way, a double grip groove sheave inthe head tower, a double grip groove sheave in the V carriage, a fall rope-'runningvthrough the tower and-from the towerto-theic'arriage and engaged'in one ofthe grip grooves of eachof the said double grip groove sheaves,a fall block on the fall rope below the carriage, an idler sheave in the'tail" tower, a fall rope compensating line running through the other grooves of said-double grip groove sheaves and. over the idler sheave inthe'itail tower and directed infa continuous circuit between *the'towers, said idler sheave being mounted in a fmovable support, and means counter "'4O weighting"the sheave support to? tension an jit -ake up slack in thecompensatingrline, .9. An aerial haulage system comprising a head-tower, atailtowena trackway between i the towers, a carriage running on'the track- 3,475 adoubleigrip groove sheave .in the head tower," a 'double grip groove sheave in the carriage, a fall rope runningithrough -the towerand from the tower to the carriage and engaged in one 'ofthe grip grooves of each 0f the said doublegrip groove. sheaves ,ia fall block on the fall rope below the carriage, an =id1er sheave in the tail tower, a-fall rope compensating' line runningfthrough the other grooves of said double grip groove sheaves '5 andfover-the idler sheave I in-the-tailf tower sand directed inra' continuous circuit between -the-towersyand another, compensating line" idire'cting'pulley inthe head-tower f- 10.; A cableway comprising a headgtower, tail tower, a track cable between thei towers, arriage; running on the tra'ck cable,..a'

sheave stru-cture in the head tower consisting substantially ofta'double groovesheavafan other substantially similar sheave structure 31191 1?fie iri figai llrope r nninathmugh one: groove ofeach of sheaves, a tall blockon the fall rope belowthe carriage, and a 1 fall ropeicompensating or supporting line running in the other grooves of said sheaves, and additional means supporting the compensating line in a continuous circuit between the towers, whereby forces acting on the rope between the head tower and carriage are compensated, sagging. is" prevented and positive descent ofthe fall block with' light or no load is efi'ected. 74 p 11. A 'cableway comprising a head tower, a tail tower, atrack cable between the towers, a carriage running on the track 1 cable, a sheave structure in the head tower consist- 'ingisubstantiall v of a double groove. sheave,

' and being directed in a continuous circuit between the towers and through the carriage, whereby forces acting on the; fall rope between the headtower'and carriageare compensated, saggingyis-prevented and positive descent of the fall block with light' or no load is effected. 1 p 12. cableway comprising aheadtower, a tail tower,- atrack cable between the'towers, .a carriage running on thetrack cable,axd0}1- ble grip groove sheave in the head'toweix-a doublegrip groovesheave in the carriage, a fall rope running up through thetower and from the tower to the carriage and' engaged in one of the-grip grooves of each of the said double grip groove sheaves, a fallblock on the fall rope below the-carriage, an i dler sheave in the tail tower, and a fall ropecompensating line running through the other grooves of, said double grip; groove sheaves and over the idler -sheaveinthe tail tower and directed ina continuous circuit between thetowers) 7 ;.13. Jcableway comprising ahead tower. a tail tower, a track cable between the 'towers, a carriagerunning 'on theftrackcablea double grip groove sheave in thehead tower,

sheave in the tail tower, afall rope compensating line running through the other grooves 5 of said double grip groove sheaves and over the idler sheavein the tail tower and-directed .in a continuous circuit, between thetowers,

said idler sheave being mounted in a movable support, and. means counterweighting the A in the compensating line.

[ in one of the'grip grooves of each of the grooves of said double gripgroove, sheaves 15. A cableway including head and tail 7 i towers, atrackway, a carriage running on the 2 block thereon below the carriage, and fall mechanism in the head tower and in the car 7 grooves connected: to rotate together, t

of the fall rope is restrained from undesired v I trackway, a carriage thereon, carrlagetrav- ;riage, a load-supporton the fall line below i the carriage,acompensating line physically -free and independent of the fall 'ropeand fi inthe carriage. e

" ,dfl Of February, 1930. t

sheave support to tension andtake up slack 14. A cableway comprising a head tower,

V .a tail tower, a track cable between the towers,

' 5 a carriage'running on the track cable, a dou- I ble grip groove sheave in the head tower, a double grip groove sheave in the carriage, a fall rope running upthrough the tower and from the'tower to the carriage and-engaged said double grip groove sheaves, a fall block on the fall rope below the carriage, an idler sheave in the tail tower, a fall rope compensating line running through the other and over the idler sheave in thetail tower and directed in a continuous circuit between the towers, and another compensating linedirecting sheave in the'he'ad tower. I

'trackway, and carriage traversing means, in comblnatlon therewith a fall rope running from the head tower to the carriage and a rope controlling means including as principal essentials a fall rope compensating line directed in acontinuous course between the towers and through the carriage, and sheave V riage respectively, each said sheave mechamsm consisting substantially of two rope e stretches of the fall rope and compensating V 35 line betweenthe tower and carriage being engaged respectively c in corresponding 7 grooves of the two sheave mechanisms whereby the compensating line and said stretch of the fall rope are interconnected, said stretch 2 sagging, and loweringof the tall block is definitely effected when relatively light or V unloaded. I

16. An aerial haulage system comprising a ersing means, a fallropeext-ending fromone 1 end of the trackwayto and through the carmovable in a continuous circuit between the ends of the trackway, and rotary connecting 1 means between the fall rope'and compensating line near one end of the trackwayand Signed at Chattanooga, Tennessee, this 15th day of February, 1930 f FRANK WARD REILLY. I Signed at Chicago, Illinois, this 19th day ,7

DELMAR c. SHERMAN.

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