Патент USA US3086242код для вставки
"April 23, 1963 ' 4- J. E. NIXON 3,086,232 METHOD OF‘ AND APPARATUS FOR SPINNING CABLES FOR SUSPENSION BRIDGES ‘Filed Oct. 12, 1960 5 Sheets-Sheet 1 April 23, 1963 J. E NIXON . 3,086,232 METHOD OF AND APPARATUS FOR SPINNING CABLES FOR SUSPENSION BRIDGES Filed Oct. ‘12, 1960 5 Sheets-Sheet 2 Aprll 23, 1963 ‘ ' J. E. NIXON 3,086,232 METHOD OF‘ AND APPARATUS FOR SPINNING CABLES FOR SUSPENSION BRIDGES Filed Oct. 12, 1960 5 Sheets-Sheet 3 G Aprll 23, 1963 J. E. NIXON 3,086,232 METHOD OF‘ AND APPARATUS FOR SPINNING CABLES FOR SUSPENSION BRIDGES Filed Oct. 12, 1960 5 Sheets-Sheet 4 April 23, 1963 3,086,232 J. Ev NIXON METHOD OF AND APPARATUS FOR SPINNING CABLES FOR SUSPENSION BRIDGES Filed Oct. 12, 1960 5 Sheets-Sheet 5 N q. ('0 v Q M A V. I Q 7 ‘ice “nited States 3,086,232 Patented Apr. 23, 1963 i 2 3 (P86 232 will be a dead wire extending from the anchorage at the far end of the bridge structure. METHDD OF AND All’PARATUS FOR SPINNENG When the carriage reaches the initial end of the bridge CABLES FOR SUSPENSION BREDGES John E. Nixon, Langhomc, Pan, assignor to The Colorado Fuel and Iron Corporation, Denver, Colo., a corpora structure it will be passed around a suitable turnaround tion of Colorado Filed Oct. 12, 1960, Ser. No. 62,134 27 Claims. (Cl. 14-23) track of the same character as is provided at the tar end of the bridge structure. The new wire which has been laid may be adjusted as to length, as by the technique dis closed in said pending application, and the measured length of wire may be anchored by a strand shoe, or the This invention relates to a new method of and appara 10 like, at a point adjacent that at which the initial end of the wire was anchored. The same cycle of operations may tus for spinning or laying the wires for parallel wire sus then be repeated as many times as required to lay out suc pension cables vfor bridges and the like. 'An important cessively a suf?cient number of dead Wires to form a ‘aspect of the invention is the elimination of the necessity strand of the ?nal cable. In the conventional manner, of carrying across the bridge structure loops of wire, in volving (a dead wire and a live wire, from a supply drum 15 strands may be adjusted and set in the towersaddles and additional strands may be produced and similarly set to at one or each of the ends of the bridge structure, in ac cordance with the conventional prior practice. It also eliminates the necessity of winding great lengths of wire on large supply drums and transporting these large drums complete the ?nal cable. The wire which is carried across the bridge structure, in the manner described above, may be delivered to the 20 site of the bridge at each anchorage thereof in coils weigh to the site of the bridge. ing about 360 lbs. ‘each. The tram or carriage is prefer The present invention involves the spinning or layingv ably adapted to carry three such coils from which the wire into a strand of the ?nal cable of only a single, dead wire is successively payed out in the course of travel of the upon each passage of a carriage across the bridge struc carriage across the bridge structure. At each end of the ture. Also it enables the use of only comparatively small coils of wire as the source of supply in the course of lay 25 latter, provision is made for adding new coils of wire to the carriage to replace those which have become exhausted ing the wires, such coils being light enough to be mounted in the course of travel of the carriage across the bridge on the carriage which traverses the bridge structure. It structure. In adding such new coils to the carriage the has been found that this greatly facilitates the laying of outer, free end of one coil is connected with the inner, ' the required number of wires to form a suitable strand for the cable and reduces the cost of the operations re 30 ‘free end of the last coil remaining on the carriage and the inner, free end of the coil so connected is connected to quired for the completion of a suspension cable. the router, free end of the next coil added to the carriage, . This is a continuation in part of applicant’s pending ap Such connection of the free ends of successive coils may plication Serial No. 772,238, ?led on November 6, 1958, and now Patent No. 2,971,255. In that application, which is primarily directed to carrying across the bridge struc ture loops of wire having a dead wire and a live wire, a novel mode of adjusting the various wires to the proper length is disclosed. The mode and means for adjusting the length of the various wires, as disclosed in said appli cation, may be used to advantage in connection with the present invention. But this invention is concerned pri be provided by nipples or ‘ferrules of the character dis closed in said pending application, these serving to pro vide a juncture between the connected free ends of the wire having a tensile strength at least as great as that of the wire itself. As in the conventional practice of forming parallel wire suspension cables for bridges, the wire employed may suit ably have a diameter of .196 inch. ‘If three coils of such wire are applied to the carriage, each coil weighing 360 lbs., the total length of the wire available on the carriage individual wires ‘entering into a suspension cable are laid. will be approximately 12,000‘ feet. This is usually more =T-he term “dead wire,” as used herein, should be under stood .to mean a wire which has its free end anchored at 45 than adequate to provide for the laying of a wire com pletely across the bridge structure from one anchorage to one end of the bridge structure and which does not shift the other. If a greater length of wire is required ‘for this bodily in a longitudinal direction as it is laid across the purpose, the carriage may be adapted to receive, say, four bridge structure. A “live wire” on the other hand, is one coils of wire to ‘avoid the necessity of adding rurther coils which is continuously being drawn from a source of sup ply to form one leg of a loop, the other leg or branch of 50 to the carriage at any point other than the two anchor ages. which is held stationary adjacent the source of supply and marily with the procedure and apparatus by which ‘the ‘In such an operation the live The carriage employed in accordance with the present Wire is carried forwardly at twice the speed with which the dead wire is being laid. invention is of special construction and has a relatively thus becomes a dead wire. Under the system contemplated by the present inven tion the wire supply, as stated above, is in the form of coils which are carried across the bridge structure in the course of laying a single wire. The free end of the wire being laid is anchored at one end of the bridge structure and the supply coils are carried across the bridge struc ture by a suitable carriage or tram. When the latter reaches the .far end of the bridge structure, it is passed around ‘a suitable turn-around track and is then carried back to its starting point. The original length of wire long downwardly extending frame of lightweight but strong construction. At its upper end the frame is pro vided with a truck member having pulley-like wheels adapted to ride along the top of a track strand of suitable tensile strength to carry the required load. The above mentioned frame structure depends vertically from the 60 truck. Since the track strand must be laid along a path substantially parallel with the desired catenary form of the ?nal cable, it will be understood that the truck men tioned will sometimes be inclined upwardly in the direc tion of travel and sometimes downwardly in the direction ?rst carried across may be suitably adjusted as to length 65 of travel. The frame structure mentioned, on the other hand, always remains in a vertical position so that the in accordance with the method disclosed in said patent coils oat wire will always be directly below the truck. and it may be anchored at the far end of the bridge struc ture at its properly adjusted length to conform with the desired catenaries of the ?nal cable. On the return of and will serve to maintain the latter in a balanced con dition on the track strand. the coil carrying carriage toward the initial end of the 70 For the purpose of moving the truck with its coil carrying frame across the bridge structure, an endless bridge structure another wire to be incorporated in a strand hauling rope is provided. Readily disconnectable clamping will be payed out from the coils on the carriage. This 3 3,086,232 means may be employed for connecting the vertical frame structure to the hauling rope and to release said structure from the hauling rope at desired points in the path of movement of the truck. Such connection and release of the clamping means is preferably effected automatically. Means are provided at one of the anchorages for driving the hauling rope continuously at a desired speed. The 4. taken, a substantial amount of preparatory work will have been done in connection with the construction of the bridge. Thus, suitable towers will have been erected along the course of the bridge structure to carry the suspension cables. Also, considerable construction work will have been performed at the anchorages at the two ends of the bridge structure. When this preliminary work has been completed, a pair of track strands 11 and 11’ will be laid across the various supporting structures, including the hauling rope passes around turn-around sheaves at eac anchorage and the arrangement is such that one branch of the looped hauling rope travels in one direction and the 10 tops of the towers at the opposite sides of the main channel other branch travels in the opposite direction. This en over which the bridge is to extend. These track strands ables the connection of the coil carrying frame structure will be caused to follow substantially the contour of the catenaries to be assumed by the suspension cables. They riage, consisting of said frame structure and the truck, will, however, be disposed somewhat above the path to from the initial end of the bridge structure to the far 15 be assumed by the cables. At each end of the bridge struc end and for similarly connecting the ‘coil carrying struc ture the track strands 11 and 11’ will be de?ected out ture to the opposite branch of the hauling rope for draw wardly and downwardly about sheaves 11a and their ex ing the carriage from the far end back to the initial end treme ends will be ?rmly anchored at 12 and 12' by strand of the bridge structure. shoes or the like. Throughout their major portions the An important feature of the invention involves the 20 strands 11 and 11' will be parallel and spaced a suitable provision of special means for carrying the coils of wire distance apart, say, four or ?ve feet. to one branch of the hauling rope for drawing the car on the carriage structure in a manner to permit turning of the coils as the wire is payed out therefrom and also in a manner to apply a suitable tension of, say, 100 lbs. to the The strands 11 and 11' are adapted to provide tracks along which a coil carrying structure, indicated gener ally at 13 in FIGS. 1 and 2, may be moved. For this wire as it is being laid. Special braking means adapted 25 purpose a truck or tram having a pair of sheave-like for automatic application and release, as the carrige passes Wheels 14 is mounted at the upper end of the structure certain points in its path of movement, are provided. 13. The details of this construction will be pointed out Another special feature of the coil carrying structure more fully hereinafter. Movement of the coil carrier is that it includes a readily expansible and retractable along one or the other of the track strands is brought drum arrangement which facilitates the application of new 30 about through a hauling rope 15 which is of endless con coils. Thus, when new coils are to be applied to the car riage, the diameter of the coil carrying drum is reduced and after the coils have been applied, the diameter is in creased so that the coils are ?rmly held in place on the drum and rotate with the latter. Other advantageous features of the invention will ap pear from a detailed description of a preferred embodi ment of the same which will now be given in conjunction with the accompanying drawings, in which: FIG. ‘1 is a schematic view in plan showing the hauling cable, the track strand, the turn-around rail and related parts at one end of the bridge structure; FIG. 2 is an elevational view showing the general relationship of the parts disclosed in FIG. 1; FIG. 3 is a transverse view through the layout shown in FIG. 1 taken along the line 3—-3 of FIG. 1; FIG. 4 is a transverse view taken along the line 4-4 of FIG. 1; FIG. 5 is a side elevational view of the carriage with struction and has two branches or courses which extend across the bridge structure. At each end of the bridge, the hauling rope is provided with looped turn-around por tions. One course of the hauling rope is disposed directly beneath the track strand 11 and the other course is dis posed beneath the track strand 11' in the regions in which these track strands are parallel. As indicated in FIGS. 1 ‘and 2, the hauling rope at the left anchorage of the bridge structure is passed beneath a series of hold-down sheaves 16 and then around a sheave 17 having its axis disposed at an appropriate angle to direct the hauling rope outwardly and downwardly. The rope then passes around- another sheave 1.8, mounted to turn about an angularly disposed axis, and it extends beyond this in a horizontal plane to a sheave 19 and across to another sheave 20 from which it extends horizontally to an angu larly disposed sheave 18', another angularly disposed sheave l7’ and plurality of hold-down sheaves 16' which serve to lead it into a position directly beneath the track its depending frame structure carrying the coil receiving 50 strand 11'. Between the sheaves 19 and 20, any suitable drum and related parts; means may be provided for driving the hauling rope. FIG. 6 is a sectional view taken along the line 6-6 For this purpose there is shown a sheave 21 driven by a of FIG. 5; motor 22. Suitable reduction gearing may be provided between the motor and the shaft carrying the sheave 21. in section, taken along the line 7-7 of FIG. 6; 55 Any appropriate means is provided for creating the de FIG. 8 is a schematic view showing a reservoir for sired frictional contact between the sheave 21 and the compressed air and a valve system for controlling the hauling rope to enable the application of an adequate brake on the coil carrying drum structure; pulling force to the latter. For this purpose a suitable FIGS. 9, 10 and 11 are schematic views, in section, length of the rope may be forced into good frictional en showing the brake controlling valve in three different 60 gagement with a substantial arc of the pulley 21 or the positions; rope may be given one complete turn about this pulley FIG. 12 is a view, partially in plan and partially in hori— which should then be suitably grooved to accommodate the‘ turn of the hauling rope. zontal section, showing a clamping device mounted on the coil carrying structure and adapted to connect the As will be explained more ‘fully hereinafter, the coil same with the hauling rope; carrying structure 13 is provided with a releasable clamp FIG. 13 is a view, partly in elevation and partly in for gripping the hauling rope 15 so that the latter will vertical section, of the clamping device and the adjacent haul the carrier across the bridge structure. As the car portion of the frame structure; rier reaches an appropriate position in the region of the FIG. 14 is a longitudinal sectional view through the hold-down sheaves 16, means may be provided for auto clamping device and supporting structure, taken along the matically releasing the gripping device so that the carrier line 14-14 in FIG. 12; and may then be shifted by hand or any other suitable means FIG. 15 is a transverse, sectional View through the around the turn-around loop. A rail 23 is provided at clamping device, taken along the line 15-45 of FIG. 12. the turn~around along which the wheels 14 of the carrier It will be understood that before ‘the laying of the wires 13 may roll. This rail is suitably supported on the struc for the suspension cables of a suspension bridge is under 75 ture 19 by arms 23a provided at approximately spaced FIG. 7 is a detail view partly in elevation and partly 5 points. The rail has two parallel extensions at the right end thereof (FIG. 1) terminating ‘at points 2.4 and 24’ which are disposed close to the parallel portions of the 6 their opposite ends, these plates being in turn welded to the frame members 29. Two plates 34 and 35 (FIG. 6) held in spaced relation by collars, or the like, are secured ‘by bolts 36 to the cross-members 31 and 32. track strands 11 and 11’ and provide a continuation of The plate 35 preferably bulges outwardly toward the the track formed by the strands. As the carrier 13 reaches right (FIG. 6) and at its center carries a sleeve 37 the point 24, the wheels 14 of the carrier will ride off (FIGS. 12, 13 and 14) which also extends through a of the track strand and on to the rail 23. Similarly, on similar opening at the center of the plate 34. Sleeve the opposite side, as the carrier, on its return movement, 37 is secured by welding, or the like, to the two plates reaches the point 24' of the rail 23, the wheels 14 will ride off of the rail and on to the track strand 11’. 10 34 and 35. Within the sleeve 37 is rotatably mounted As shown in FIGS. 1, 2 and 3, there is positioned, ad a rock member having a disc-like portion 38 at its right jacent the loop of the rail 23 in the region in which the end which cooperates with the right end of the sleeve coil carrier 13 is shown, a turntable 25 mounted on a 37 and the adjacent face of the plate 35 (FIG. 14). A vertical standard 26 and arranged to be turned about the portion 39 of the rock member having a slightly re axis of the latter either by hand or by suitable power 15 duced diameter is journaled for rocking movement with means. Coils of wire of the character to be mounted on in the sleeve 37. A further reduced portion 40 of the the coil carrier 13 may be applied to the turntable 25 rock member extends toward the left into the space be either at the position A or the position B. When the coils _ tween the frame members 29. A snap ring 41, or the are so mounted by a workman, with the assistance of like, serves to retain the rock member 38, 39, 40‘ against suitable hoisting and shifting mechanism, onto a project 20 axial movement in relation to the sleeve 37 but permits ing arm portion of the turntable 251, the latter may be turning movement in relation to the latter. Extending rotated to carry the coils into position C(FIG. 1). At outwardly from the face of the portion 38‘ of the rock this point the coils will be alined with the drum on the member is a hook having two branches 42, as best seen coil carrier 13 and may be applied to the latter either in FIG. 12, which extend over the top of and are adapted manually or with the assistance of appropriate lifting and 25 to ‘grip the right side of the hauling rope 15. A co pushing means. As the new coils are applied to the coil operating clamping element 43 having a portion arranged carrier 13, an operator stationed at 27 and provided with to ride over the top of the hauling rope and a portion a nipple press draws the inner free end of the last coil 43a arranged to grip the left side of the hauling rope on the coil carrier toward the station 27 and also draws (FIG. 14) is carried by a slidahle rod 44. The latter the outer free end of the next adjacent coil which has 30 is screw-threaded at its left end 45 and secured in a been applied to the coil carrier at station C and connects screw threaded socket of a link 46 which is slidable these free ends together by a suitable nipple or ferrule. within a cylindrical cavity 40a in the rock member. The inner free end of the ?rst coil applied to the carrier As best shown in FIG. 15, the portion 40 of the rock is similarly connected with the outer free end of the member has two llat sides with which cooperate respec second coil applied to the carrier, and if a third coil is 35 tive parallel arms 48 and 49 of a lever 47. The arms being applied, the outer free end of its wire is connected 48 and 49 are pivotally connected with the portion 40 to the inner free end of the second coil that has been ap by means of screw studs 56]‘. At its left end the lever plied. The coil carrier 13 is now in condition to be 47 has a cross-member 51 provided with a vertically shifted around the rail 23 and on to the track strand extending opening therethrough in which is mounted a 11’ at the position 24’. At this point, or at a slightly rotatable disc 52. The latter is journaled by a pin 53 earlier point in the region of the sheaves 16", the clamp within the opening of the cross-member 51. When the ing means on the coil carrier may be operated to grip lever 47 is in its horizontal position, as shown in FIG. the hauling rope 15 and thus start the return movement 13, the two jaws 42 and 43 of the clamp serve to grip of the coil carrier to the initial end of the bridge struc the hauling rope 15, causing some de?ection in its con ture. As has been stated, the structure illustrated in tour, as shown in FIG. 12, and thus insuring a v?rm grip. FIGS. 1 and 2 is duplicated at the initial or right end This will result in movement of the coil carrier along of the bridge structure, but in reverse relationship so that the track strand at the rate determined by the speed the same procedures may be followed at that end when of movement of the hauling rope. It should be noted the coil carrier has been carried across, and the latter is thus prepared for return to- the left end of the bridge 50 that in the course of movement of the coil carrier across the bridge structure, the frame members 29 will always structure for a repetition of the same cycle. Referring now to FIGS. 5, 6 and 7, the construction extend downwardly in a vertical direction from the shaft 3t). On the other hand, the track strand 11 and the of the coil carrier is shown in greater detail. The sheave hauling rope 15 will sometimes be inclined downwardly like wheels 14 are shown as riding upon the track strand 11. These wheels are carried by a frame comprising two 55 and at other times upwardly in the direction of move ment of the coil carrier. This necessitates turning of side members 28 having bolts 14a extending therethrough the rock member 38, 39, 40 in relation to the sleeve which serve as journals for the wheels 14. Spacing sleeves 37. The members 44 and ‘46 will likewise turn with or other means serve to hold the frame members 28 in the rock member. It will be seen that the relationship properly spaced relation. Depending from the frame members 28 and arranged to turn ‘about a horizontal axis 60 of the various parts is such as to permit this. When it is desired to release the clamping jaws 42, in relation thereto are .frame members 29 of the coil 43 from the hauling rope 15, the lever 47 may be shifted carrier, these being suitably of I-beam construction. They upwardly into the position shown in FIG. 14. When this have welded thereto a pair of plates 29a adjacent their is done, the clamping jaw 43' will be retracted by virtue upper ends, and a sleeve 2% is welded to these plates. The sleeve 2% is journaled upon a hollow shaft 30 ?xedly 65 of the connections now to be described. On a stud 54, extending through suitable openings in the arms 48 and carried by the frame members 28. If desired, the shaft 4? of the lever 47 and held in ?xed relation thereto, is 30 may be ?xedly carried by the frame members 29 and rockably mounted one end of a lever 55 the opposite arranged to turn freely in relation to the frame members end of which‘ is forked and pivotally connected by a 281. Suitable means are provided for preventing rela tive axial movement between the shaft 30 and both the 70 stud 56 with a ?attened portion of the member 46. Thus, a toggle linkage is provided which, upon upward move— members 28 and the sleeve 2%. ment of the lever 47, serves to shift the member 46 Some distance below the shaft 30 two, cross-members toward the left (FIG. *14) and thus draw the clamping 31 and 32 (FIG. 5) are suitably secured to the frame jaw 43 toward the left. When it is desired to re-con members 29. Cross-members 31 and 32 may be of channel construction and may be welded to plates 33 at 75 nect the coil carriage with the hauling rope 15 the lever 3,086,232 7 47 may be returned to its horizontal position or to a position slightly below the horizontal so as to produce a desired locking action. Operation of the lever 47 may be manually e?‘ected but it is preferably operated automatically as the coil carrier reaches certain predetermined positions. This may be accomplished by providing an angle member 57 8 one of the frame members 29. A spring 72 surrounding the piston rod 68 normally serves to rock the bell crank lever in a counterclockwise direction (FIG. 7) to tighten the brake band 65 and thus apply a braking force to the drum 64. This braking action is such as to apply a ten sion of about 100 lbs. to the wire being delivered from the coils on the coil carrying drum in the manner to be (FIG. 6) having an appropriate sloping top surface explained. The actual force applied to the hauling rope which is engaged by the disc 52 when the coil carrier 15 by the motor 22 must exceed the desired pulling force reaches a position in the region of the sheaves 16 (FIGS. to be applied to the coil carrying frame by an amount 1 and 2). It will be understood that the disc 51 rides su?icient to overcome the frictional resistance to the up the slope provided by the angle member 57 and thus movement of the hauling rope. Thus said pulling force shifts the lever arm 47 from the position shown in full must be in excess of, say, 100 lbs. lines to that shown in dotted lines in FIG. 6. Similarly, When the coil carrying unit is in the region of the tum when the coil carrier is shifted around to a correspond— 15 around loop at either end of the bridge, it is desirable to ing position on the opposite side of the looped rail 23, release the brake so that the coil carrying drum may be i.e. in the region of the sheaves 16', the bottom face of rotated relatively freely. For this purpose provision is another angle member 58 may be engaged by the disc made for the introduction of air into the cylinder 70 in 52 and the surface of angle member 58 which is so a manner to move the piston 69 toward the right (FIG. engaged may slope downwardly in the direction of the 7) and thus overcome the action of the spring 72. Air movement of the carrier so as to force the lever arm 47 back to the full line position shown in FIG. 6. The frictional resistance to the movement of the lever arm 47 should be su?‘iciently great to cause the same to re main in any position into which it has been shifted. This is to avoid the accidental return of the lever from the clamp opening position shown in FIG. 14 as the coil carrier is shifted around the loop formed by rail 23. As shown schematically in FIG. 6, the hauling rope 15 is preferably ‘guided at appropriate points along its ‘ course, as at the tops of the towers, by a pair of sheaves 59 and 60. These should have such a peripheral con ?guration as to permit the jaws ‘42 and 43 of the clamp to pass between the sheaves. If desired, one of the sheaves of a pair may be spring urged toward the other so that the passage between the sheaves may be readily increased somewhat as the clamping jaws pass through. for this purpose is introduced through a pipe 73 from a compressed air storage tank 74 carried by the frame members 29. The delivery of air from the reservoir 74 to the cylinder 70 is controlled by a valve 75, which may suitably be a “Barksdale” four-way air valve. It has a control lever 76 for rotating a valve element 77 (FIG. 10) within the housing of the valve 75. Nor mally, the element 77 is held by spring action in the posi tion shown in FIG. 10 and it is restored to that position whenever the operating handle 76 is released. When the valve is in the position indicated in FIG. 10, it blocks off communication with all of the lines entering the valve structure. Thus, a line 80 extending from the reservoir 74 is closed off at the valve. Also a line 81 extending from the cylinder 70 into the valve is closed off at the latter. When the valve element 77 is turned in a clock~ wise direction through an angle of, say, 45°, into the position shown in FIG. 9, a passage 78 in the valve ele Referring now to FIGS. 5, 6 and '7, the frame mem bers 29 extend downwardly below the cross-member 32 ment serves to connect line 80 with line 81 and thus and in this lower region converge toward each other. 40 permits the delivery of air under pressure from the stor At their lower ends any suitable arrangement may be age tank 74 to the cylinder 70. Preferably a valve 82 provided to inter-‘connect the two frame members and is provided in the line 81 to meter the air delivered to provide for the support of a coil ‘drum and brake struc— the cylinder 70 and thus prevent a too rapid release of ture. Thus, there may be welded or otherwise secured the braking force of the band 65 upon the brake drum 45 to the frame members 29, adjacent their lower ends, a 64. After the brake has been released, the handle 76 reinforcing member 61 having a transversely extending may be released and returned under the spring action cylindrical support 62 which extends through a passage mentioned to its central position in which the valve will provided between the members 29 at their lower ends be restored to the condition shown in FIG. 10. This and projects a substantial distance toward the right (FIG. 50 will serve to retain the air under pressure in the cylinder 6) from the latter. A plate 61a (FIG. 7) may also be 70 and thus hold the brake in released condition. welded to the lower ends of the members 29 on the op When it is desired to restore the braking action upon posite side thereof from the member 61. This provides further support for the member 62 which is, in effect, a the drum 64 the valve element 77 may be turned in a is mounted on a plate 71 welded or otherwise secured to preferably provided automatic means for operating the counterclockwise direction into the position shown in stationary shaft that carries the coil drum and a brake 55 FIG. 11, by the appropriate movement of the lever 76. drum associated therewith. The brake drum has a sleeve When in this position, the line 81 extending from the or hollow shaft 63 which is journaled upon the member cylinder 70 is connected by the passage 78 of the valve 62. A brake drum 64 is keyed to the hollow shaft 63, element with a discharge line 83. The latter is prefer as indicated in FIG. 7. As will be explained, the coil ably provided With a metering valve 84 to further retard carrying drum is also secured to the hollow shaft 63 so the discharge of air from the cylinder 70 and thus bring that it and the brake drum rotate in unison. A brake about a slow and gentle application of the braking action. band 65 surrounding the brake ‘drum 64 has one end con It will be noted that when the rotary valve element 77 nected with the outer end of an arm of a bell crank lever is in the position of FIG. 11, the line 80 extending from 66 pivotally mounted on a stud 67 ?xed to two cross reservoir 74 communicates with passage 79 in the valve members 67a welded to the frame members 29. Bell 65 element but the opposite end of this passage is closed crank lever 66 preferably has two parallel side members off by a plug 85. If desired, the passage 79 can be of the same con?guration, which are spaced suf?ciently omitted from the rotary valve element 77. to accommodate the ends of the brake band and are inter Provision is made for recharging the air reservoir 74 connected in any suitable manner for movement as a at either end of the bridge structure. For this purpose single member. The opposite end of the brake band is 70 a pipe 86 extending from the reservoir is provided with connected with an extension of the pivot stud 67 of the a quick attachment fitting 87 by which a line from a bell crank lever. An upwardly extending arm of the larger source of compressed air may be connected into latter has connected therewith a piston rod 68 extending the reservoir 74 to build up its supply of compressed from a piston 69 Within an air cylinder 70. This cylinder air. Also at each end of the bridge structure there is 1 3,086,232 9 . 10 valve 75. Thus, as shown in FIGS. 1 and 6, there may be provided an angle iron frame 88 which may be in a tubes 90 of the right hand group (FIG. 6). A quick connection ?tting 109 disposed‘ centrally of the mani region below the sheaves 16 (FIG. 2) adjacent the region fold 107 provides for the connection of a hose line from in which the angle member 57 is located. Member 88 has an upwardly sloping surface which will serve to rock introduce air under pressure into each of the six cylin the arm 76 upwardly, or in a ‘clockwise direction, as the ders 101 and thus causes the pistons therein to move coil carrying frame is drawn toward the left, and will thus bring about delivery of air under pressure into the cyl radially outwardly from the axis of the shaft 63 against any suitable source of compressed air. This serves to the action of the springs 103. In this way the diameter of the coil retaining drum is increased to the desired ex inder 70 to release the ‘brake. On the opposite side of the turn-around loop in the region of the sheaves 16' an 10 tent to grip the inner surfaces of the coils and hold the latter against turning relative to the drum. When it is angle member 89 may be provided, this having a down desired to retract the various segments of the drum a wardly sloping bottom surface adapted to act upon the manually operable valve 110 on ‘the manifold may be lever 76 and rock the same downwardly, or in a counter opened to release the air from the various cylinders 101 clockwise direction, to bring about restoration of the 15 to the atmosphere. The springs i103 will then retract brake action. _ the segments to the desired extent and the valve 110 will Secured to the sleeve or hollow shaft 365, toward the then be closed by the operator. It will be understood right of the brake drum 64 (FIG. 6), are six pairs of hol that the expansion and contraction of the drum in the low cylinders or tubes 90, these being spaced at 60° in manner explained will take place at the station designated tervals around the shaft 63. They may be secured to the latter in any suitable way, as by welding. At its outer 20 C in FIG. 1. It has been found desirable, in a construction adapted end each of the cylinders or tubes 90 receives telescopic to carry three coils on the segmental drum, eaolr coil ally a hollow cylinder or tube 91. This arrangement is weighing 360 lbs., to provide the air cylinders 101 with such that the radial length of the arm formed by each a bore of 3" thus providing an effective area on the piston set of tubes 90 and 91 may be lengthened or contracted. Adjacent the outer ends of the tubes 90 of each set, i.e. 25 of 7.07 sq. inches. The stroke of each piston may suit the right hand and left hand sets (FIG. 6), there is welded to the outer surfaces of the tubes a ring 92 to assist in ably be 1% inches. Air supplied to the cylinders under a pressure of 90 lbs/sq. inch will provide each cylinder with the capability of exerting 635 lbs. of force on the segment connected with the piston. This is more than the same radial plane from the axis of the shaft 63 there is 30 adequate to take care of the weight of the three coils mentioned since at least two segments will be effective at ?xedly mounted the mid-point of a segment of the coil any time to exert the desired lifting component of force. carrying drum. As shown in FIG. 5, there may be six such Preferably, however, the drum is so positioned at the segments. Each comprises a front, ?at, plate-like member time it is at station C that one segment will be at the top 93‘ and a rear, flat, plate-like member 94 welded to the outer face of the related tube 91. The member 94- has 35 of the drum, as shown in FIG. 5, so that this segment will exert its force upwardly while the two adjacent seg a plurality of radially extending reinforcing ribs 95 maintaining the tubes in their ?xed radial positions. At the outer ends of each pair of tubes 91 whose axes are in welded to the plate 94 and also to an outwardly extend ing portion 96 of a segmental member 97‘ which is adapted to support the coils of wire which are indicated in broken lines. Each of the members 93 has a plurality of laterally extending ears 98 providing pivots for arms 99 which may be swung into the full line position shown in FIG. 6 or downwardly into the broken line‘position shown. Any suitable means may be provided for locking the arms ments will exert a substantial upward force. A housing 111, preferably formed of lightweight, non corrosive sheet metal, is preferably provided over the brake drum and the brake operating mechanism as shown in FIGS. 6 and 7. This is to protect the brake mechanism during periods of rain and the like. The bot tom of the housing preferably has an opening 112 to provide for the circulation of air and thus prevent over 99 in the full line position shown. It will be appreciated 45 heating of the brake mechanism. It will be seen from the foregoing that the invention that when the coils are being applied to the drum the provides an expeditious way of laying wires across a arms 99 will be swung downwardly into the dotted line bridge structure for incorporation in the various strands position and after the coils have been assembled on the of the suspension cables therefor. It eliminates the drum the arms are swung upwardly again and locked in 50 necessity of large drums of wires to be transported to the full line position shown. the site of the bridge and eliminates the need for the The means for shifting the various segments of the bulky unreeling mechanism heretofore employed. A drum outwardly and inwardly in a radial direction will single dead wire is payed out from a supply of reasonable now be described. As shown in FIG. 6, each pair of Weight carried across the bridge structure under the re tubes 90 has secured thereto by welding, or the like, a plate 100 extending between the pair of tubes in a direc 55 quired tension, say 100' lbs., to cause it to assume the de sired catenaries. Adjustment of the wires so laid may be tion transverse to the axes of the tubes in the mid-region very expeditiously effected during the period in which thereof. This plate has secured to it, by bolts or the the supply of wire on the carrier is being replenished and like, an air cylinder 101 havingtherein a piston 102.. the carrier is moved around the turn-around loop. While The piston is normally urged toward the axis of the shaft 63 by a spring 103 surrounding a piston rod 104- within 60 a certain amount of slack may be produced in the wire from the drum on the carriage as thelatter is shifted the air cylinder. At its upper end the piston rod 104 is around the turn-around loop, this may be taken up read connected with a plate i105, secured by welding or the ily by turning the drum while the brake is not being ap like, to the tubes 91 and the segment 97 of the drum. plied. If desired, however, the slack may simply be Thus, normally the various segments 97 are drawn in wardly by the spring 103 to reduce the diameter of the 65 taken up as the hauling rope moves the carriage a rela tively short distance on its return to the opposite end of drum and facilitate the application of coils of wire the bridge structure. thereto. After the coils have been applied to the drum, While a preferred embodiment of the invention has the various segments will be urged outwardly by the in~ been described in considerable detail, it will be under troduction of compressed air into the cylinders 101. For this purpose the inner end of each cylinder is con 70 stood that var-ious modi?cations may be made in the nected by a ?exible hose line 106 with a manifold 107 form and arrangement of the devices and structures em ployed and in the sequence of steps followed, without departing from the invention‘ as de?ned by the appended claims. To expedite the forming of the cables, more Welding or the like, to the outer face of an annular mem ber 108 surrounding the shaft 63 and welded to the six 75 over, provision may be made for carrying several dead mounted at the end of the shaft 63‘ and secured by weld ing or the like, to a ring 108a which in turn is secured by 11 3,088,232 wires acros sthe bridge structure at the same time. Thus, 12 8. Apparatus of the character set forth in claim 7 in separate coil carrying structures of the character herein which means is provided for readily releasing and re disclosed may be simultaneously employed for the produc applying said frictional resistance. tion of the two cables required. In such case the entire 9. Apparatus of the character set forth in claim 7 in structure herein disclosed will ‘be duplicated in the region 5 which said means for supporting coiled wire comprises of the second cable to be laid. a segmental drum, and means for moving the seoments of What is claimed is: said drum in a radial direction to increase and decrease 1. A method of spinning a parallel wire cable for sus the diameter of the drum. pension bridges and the like which comprises anchoring 10. Apparatus for laying Wires for incorporation in a the free end of a supply of wire adjacent one end of the suspension cable for bridges and the like which comprises desired cable, carrying said supply of wire along a path a plurality of track strands ?xedly mounted along sub conforming substantially with the contour of the desired stantially parallel paths having approximately the catenary cable and paying out wire from said supply as the latter contour of the cable to be formed, an endless hauling rope advances, applying frictional resistance to the delivery of having a course thereof below each of said track strands, Wire from said supply to ‘apply a tension thereto between 15 means for shifting said rope lengthwise along said courses, the anchorage therefor ‘and said supply to eliminate slack a carriage mounted for movement in one direction along as the wire is delivered from the supply and to maintain one of said track strands and then in the opposite direc the wire along the desired path of the cable, anchoring tion along another of said track strands, means on said a portion of said wire at a point adjacent the ‘opposite carriage for supporting coiled wire, readily releasable end of ‘the desired cable, and returning said supply of 20 means for connecting said carriage with the course of said wire to a point adjacent said one end of the desired hauling rope beneath said one of said strands to move cable along a path conforming substantially with the con the carriage along the latter and for subsequently con tour of the desired cable While said frictional resistance necting said carriage with the course of said hauling rope is applied to the delivery of the wire from said supply. beneath the other of said track strands when the carriage 2. A method of spinning a parallel wire cable for the 25 is mounted for movement thereon, means for anchoring purpose and in the manner set forth in claim 1 in which the free end of wire drawn from said coiled wire on said a portion of said wire is anchored at a point adjacent carriage at a point adjacent one end of the cable to be the anchorage of said free end of the wire after said formed while the carriage is adjacent said point, means supply has been returned to said point, and in which said for anchoring a portion of the wire payed out from said supply is carried again to said opposite end of the desired 30 coiled wire when the carriage reaches the opposite end cable and another portion of the wire is anchored adja of the cable to be formed, and means for applying a fric cent said opposite end of the cable, returning said supply ional resistance to the delivery of wire from said coiled of wire to the initial end of said cable, and repeating wire as said carriage is being moved by said hauling rope. said steps until a sufficient number of wires have been 11. Apparatus of the character set forth in claim 10 laid to form a desired strand. 35 in which a looped rail is provided adjacent each end cf 3. A method of the character set forth in claim 2 in the cable to be formed, said rail at each of said ends which said supply of wire is moved around a looped path being arranged to receive said carriage from one of said at each end of the desired cable to turn said supply track strands and deliver said carriage to the other of through an angle of 180° about a vertical axis. said track strands. 4. A method of the character set forth in claim 2 in 12. Apparatus of the character set forth in claim 11 Which each wire as it has been payed out and laid from having automatic means for releasing said releasable said supply is adjusted to its desired length before it is means for connecting said carriage with said hauling rope anchored at the end ‘of the desired cable to which it has in regions adjacent the points of transfer of the carriage been carried. from the track strands to said looped rails, and automatic 5. A method of the character set forth in claim 2 in 45 means for connecting said carriage to said hauling rope which one ‘or more new ‘coils of wire are added to said supply adjacent at least one end ‘of the desired cable, and in which selected free ends of the wires in the previous and added coils are connected together to form a con in regions adjacent the points of transfer of said carriage from said looped rails to said track stands. 13. Apparatus of the character set forth in claim 12 in which said releasable means for connecting said car tinuous single wire to be delivered from said coils in 50 riage with said hauling rope comprises a lever, and said succession. automatic means comprises a cam positioned in each of 6. A method of the character set forth in claim 1 in the recited regions, and means carried by said lever co which said wire supply is in the form of coils adapted operating with said cams for successively releasing and to be mounted on a revolvable drum and in which the connecting said carriage from and with said hauling rope. diameter of said drum is decreased at the time the coils 55 14. Apparatus of the character set forth in claim 10 of Wire are applied thereto and increased prior to the in which means are provided for automatically operating movement of the drum to pay out Wire. said means for applying frictional resistance to the de 7. Apparatus for laying Wires for incorporation in livery of said wire to thereby apply and release tension a suspension cable for bridges and the like which com on said wire at predetermined positions in the path of prises a track strand ?xedly mounted along a path hav 60 movement of said carriage. ing approximately the catenary contour of the cable to 15. Apparatus of the character set forth in claim 14 be formed, a hauling rope mounted for movement along in which said means for operating said means for ap a path below that of said track strand, means for mov plying frictional resistance to the delivery of said wire ing said hauling rope along said path, a carriage mounted comprises an air actuated member and a source of com for movement along said track strand and provided with 65 pressed air, a valve for controlling the delivery of air means for supporting coiled wire, means for connecting from said source to said air actuated member, a lever said carriage with said hauling rope to cause movement connected with said valve for operating the same, and cam of the carriage along said track strand, said last-mentioned means positioned along the path of movement of said means being releasable to disconnect said carriage from carriage arranged to cooperate with said lever to operate said hauling rope, means for anchoring the free end of 70 the same and said valve to control the delivery of air to wire drawn from the coiled Wire on said carriage at a said air actuated member and the discharge of air there point adjacent one end of the cable to be formed, and from. means for applying a frictional resistance to the delivery 16. Apparatus of the character set forth in claim 10 of wire from said coiled Wire as said carriage is moved in which said means on said carriage for supporting coiled along said track strand. 75 Wire comprises a drum adapted to receive and retain a 3,086,232 13 plurality of coils of wire having the ends of the wires in the several coils connected together to form a single con tinuous wire, said coils having such frictional engagement with said drum as to prevent turning of said coils relative to said drum. . a 17. Apparatus of the character set forth in claim 16 in which said drum is formed by a plurality of segments adapted for radial movement in relation to the axis of said drum, and means for moving said segments radially of the axis of said drum to decrease or increase the diam 14 and means connected with said brake band for urging it into frictional engagement with said brake drum around the major portion of'the circumference of the latter. 24. Apparatus of the character set forth in claim 23 in which means are provided for forcing said brake band out of frictional engagement with said brake drum, said last-mentioned means comprising an air cylinder and pis ton, a container for air under pressure mounted on said carriage, a conduit connecting said container with said 10 piston, and a valve in said conduit for controlling the de livery of air therethrough. eter of said drum to thereby facilitate the application of 25. Apparatus of the character set forth in claim 24 coils of wire thereto and thereafter establish sufficient in which said valve is provided with an operating lever, friction between said coils and said drum to cause the and ?xed means along the path of movement of said car same to turn together without slippage. 18. Apparatus of the character set forth in claim 17 15 riage adapted to engage said lever to‘ operate the same as the carriage is being advanced. in which said means for moving said segments radially of 26. Apparatus of the character set forth in claim 25 the axis of said drum comprises a cylinder for each seg in which said valve and said lever may be operated in ment extending radially from the axis of said drum, means opposite directions from a normal position, means for for retaining the cylinders for all of the segments in ?xed position relative to the axis of the drum, a piston in each 20 urging said valve and lever into such normal position, said valve having port means, said port means being cylinder having a connecting rod extending outwardly closed off when said valve is in its normal position, said therefrom and connected with the related segment and port means being arranged to place said container in com means for introducing air under pressure into each of said munication with said cylinder when said valve is shifted cylinders for forcing said pistons and the connected seg 25 in one direction from its normal position and to place ments in at least one direction. said cylinder in communication with the atmosphere when 19‘. Apparatus of the character set forth in claim 17 said valve is shifted in the opposite direction from its nor in which said pistons are adapted to move said segments mal position. in one direction, spring means for moving said pistons and 27. Apparatus for spinning a parallel wire cable for segments in the opposite direction, and valve means for locking air under pressure within said cylinders and for 30 suspension bridges and the like which comprises means for anchoring the free end of a supply of wire adjacent releasing the air therefrom when desired. 20. Apparatus of the character set forth in claim 11 in which a turntable is provided adjacent at least one of one end of the desired cable, means for carrying said sup ply ‘of wire along a path conforming substantially with the contour of the desired cable and for paying out wire tending arms adapted to receive coiled wire and convey 35 from said supply as the latter is carried along said path, means for applying frictional resistance to the delivery of the same to a position substantially parallel with an ad wire from said supply to thereby apply a tension to the jacent portion of the looped rail, thereby enabling ready wire between the anchoring means therefor and said sup transfer of said coiled wire to said carriage when the latter said looped rails, said turntable having horizontally ex is at said portion of the looped rail. ply, said last-mentioned means being adapted to apply 21. Apparatus of the character set forth in claim 20 40 sufficient frictional resistance to eliminate. slack as the wire is delivered from the supply and to maintain the wire in which said means on said carriage for supporting coiled along the desired path of the cable, and means for an wire comprises a drum adapted to receive and retain a choring a portion of said wire at a point adjacent the plurality of coils of wire having the ends of the wires in the several coils connected together to form a single con 45 opposite end of the desired cable, said second-mentioned means being constructed and arranged to return said sup tinuous wire, said drum being formed of a plurality of ply to a point adjacent said one end of the desired cable segments mounted for movement in directions toward and away from the axis of the drum, and means for mov along a path conforming substantially with the contour ing said segments toward said axis when the carriage is of the desired cable while said means for applying fric at said portion of the looped rail to facilitate transfer of tional resistance to the wire is active. new coils from said turntable to said drum and for there References Cited in the ?le of this patent after moving said segments away from said axis to cause said segments to forcibly engage the inner surfaces of UNITED STATES PATENTS all of the coils mounted thereon. 1,785,023 Edwards _____ _; _______ __ Dec. 16, 1930 22. Apparatus of the character set forth in claim 21 55 1,850,698 Sunderland __.______,_____ Mar. 22, 1932 in which means are provided adjacent said portion of the 2,797,878 Crorn ___________________ __ July 2, 1957 looped rail for connecting the free ends of the wire of 2,811,773 Baskin _____________ __.'____ Nov. 5, 1957 the coils previously applied to the drum and of the new coils applied to the drum so as to provide a single con tinuous wire. 60 23. Apparatus of the character set forth in claim 21 in which the means for applying a frictional resistance to the delivery of wire from the coils of wire comprises a brake drum, a brake band surrounding said brake drum, 2,861,332 2,971,255 Hayden _____________ __. Nov. 25, 1958 Nixon ________________ __ Feb. 14, 1961 OTHER REFERENCES Construction Methods and Equipment, March 1956, pages 58-63.