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Патент USA US3086242

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"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
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“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.
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