US1737446A - Lining of iron and steel pipes, tubes, and other hollow bodies - Google Patents

Description

4 Sheets-Sheet l c. G. ATHA LNING OF IRON AND STEEL PPES, TUBES, AND OTHER HOLLOW BODIES Filed June'zfr, 1927 Nov. 26, 1929.

c. G. ATHA 1,737,446

TUBES, AND OTHER HOLLOW BODIES Nov. 26, l 929.

LINING 0F IRON AND STEEL PIPES,

Filed June 27, 1927 c. G. ATHA 1,737,446

D OTHER HOLLOW BODIES Nov. 26, 1929.

IRON AND STEEL PIPES, TUBES, AN

Filed June 27, 1927 4 Sheets-Sheet 3 NOV. 26, 1929. Q G, ATHA v 1,737,446

LINING OF IRON AND STEEL- PIPES, TUBES, AND OTHER HOLLOW BODIES Filed June 27, 1927 4 sheets-sheet 4 treated in rapid succession,

Patented Nov. 26, i922 CHARLES G-URNEY ATHA, 0F BIGGAR, SCOTLAND, ASSIGNOR TO V.S'LEJUAR'E@a @t LGYDS LXMITED, 0F GLASGOW, SCOTLAND LINING 0F XEON AND STEEL PIPES, TUBES, AND OTHER HOLLOW BOES Application filed une .27,

This invention relates to the centrifugal lining of iron and steel pipes, tubes and other hollow bodies with a bituminous substance such as natural or artificial asphalt, or other bituminous material or composition (hereinafter referred to as substance7) by spinning the pipes or the like, when charged with the bituminous substance in liquid form so that the substance will be uniformly distributed, by centrifugal action, over the interiors of the pipes or the like.

The object of this invention is to provide improved apparatus for centriiugally lining the iron and steel pipes, tubes and other hollow bodies (hereinafter referred to, throughout the specification, simply as pipes) whereby large numbers of pipes can be and the treatment be carried on continuously.

According to this invention, the improved apparatus comprises upper and lower travelling members between which the pipes, after having been charged with the bituminous substance in liquid condition, after the other, the travelling members acting on the pipes and, while translating them, also spinning them rapidly about their own axes so as to distribute the lining substance uniformly over the interior surfaces thereof.

The spinningl f the pipes about their own axes may be e ,ected either by upper travelling members and the lower travelling members to move in opposite directions or by causing them to move in the same direction but at differential speeds which eilects the same action.

The appartus preferably comprises a plurality of endless, parallel, power driven roller chains and, thereabove, a. plurality of end less, parallel power driven belts whose lower stretches move 'with a linear velocity different from that of the upper stretches of the roller chains so that when the pipes, after having been charged with the bituminous substance in a liquid condition, are fed on to the chains whereon they lie transversely between adjacent rollers, they are translated bodily, while the belts contacting with them cause them to spin simultaneously about thel are fed one causing the 1927, SerialA No. 201,930, and in Great Britain January 1, 1927.

own axes to distribute'the liquid lining substance. y

A plurality of lower endless power driven belts may be provided, each arranged around one of .the roller chains so that its upper stretch 4is slack and rests upon the upper stretch of the roller chain which moves under the belt in the same direction but relatively slowly so that, when charged pipes arel fed 1n between the upper and lower belts, the latter sag thereunder between the rollers of.x the chains forming hollows by the progression of which'the `pipes are translated bodily whileat the saine time being acted on by the differentially vmoving adjacent stretches of the upper and lower belts and are thereby spun.

'In order that the invention ma be clearl understood two embodiments t ereof wi l be described by way of example and with reference to the annexed drawings, whereonzlig. 'l is a side elevation of apparatus for limng pipes made in accordance with this invention, and illustrated in section on the line 1-1 of Fig. 2,

Fig. 2 is a plan view ofthe apparatus with the water spray apparatus not shown,

Fig. 3 is a side elevation ofa modified form ot apparatus, in section on the line 3-3 of Fig. 4, and.

Fig. 4 is a plan View corresponding tol Fig. 3.. y

On the drawings, Figs. l and 2, the numerals l denote uprights-on strong foundations, between two of which is a shaft 2 carrying belt pulleys 3 spaced apart. The remaining uprights 1 carry two belt pulleys 4 each corresponding to a pulley 3. Endless belts 5 are paed round the pairs of corresponding pulleys 3 and 4.

The shaft 2 is electric motor 6.

A number of uprights 7 are arranged as shown in the drawing. Theuprights 7 at the right hand as seen in the drawing carry a shaft 8 which carries two spaced sprocket wheels 9 and is geared through reduction gearing 8a to an electric motor 10. The `re geared by gearing 6*? to an maining uprights 7 carry two short colinear shafts 11 yeach bearing a sprocket wheel 12. The shaft 8 passes between theupper and lowerstretches ofthe belts 5 near the pulleys 4, and the two shafts 11 pass between the said up er and lower stretches near the pulleys 3.

(river each of the sprocket wheels 9 and its corresponding `sprocket wheel 12 a broad endless ro ler cham 13 is passed, there being thus two such chains. Each chain 13 is arranged in the plane of one of the belts 5 between the upper land lower stretches. thereof and be tween the supporting pulleys 3 and 4 thereof, as shown, the arrangement being such that the upper stretch of the belt5 rests on the u per stretch of the corresponding chain 13, W ich is supported by, and adapted to run upon, a stationary bar or skid 14 mounted on supports 15.

At the left hand end of the apparatus are two further uprights 16 each carrying a sprocket wheel `17. The short shafts 11 carry two sprocket wheels 18 corresponding to the sprocket wheels 17 and around each pair of corresponding sprocket wheels17 and |18 an endless chain or band 19, having projecting pins or Stoppers 20 on it, is passed. These two bands 19 together'form a feed conveyor.

Alongside each of the bands 19 is placed a stationary ramp 21 comprising an incline,l a horizontal art and a decline. A transverse spindle 22 1s supported in bearings below the ram sl and has two arms 23 fast on it. The sha t 22 has a square end (see Fig. 2) and can be turned by a crank handle.

At the right hand end of theapparatus are two more uprights 24 supporting sprocket wheels 25 which correspond to two sprocket. wheels 26 fixed on the shaft 8. The sprocket wheels 25 and 26 carry 'between them two endless chains or bands 27 having projecting kpins or Stoppers 28.y These bands 27 form together a discharge conveyor.

The upper stretch ,of each of the bands of the feed conveyor and of each of the bands of the discharge conveyor is supported by a stationary bar or skid 29, there being four stationary bars as shown.

30 denotes a series of longitudinal parallel bars of the same height as the feed conveyor and forming a feed rack.

31 denotes a series of longitudinal parallel bars forming a discharge rack, slightly lower than the discharge conveyor.

In line with the extremities of the belts 5 are two transverse gantries bridging the said belts. These gantries each 'comprise uprights 32 and transverse beams 43 supported by the uprights. Approximatel above the belts each gantry has two plat orms v44 mounted on it and below each platform there is a guide member 33 in which blocks 34 are vertically slidable. The blocks 34 carry between them and below them a movable transverse beam 4 5 having hangers 46 in which a transverse shaft 47 is journalled. The shaft gantry and is geared to the sha-ft 47 of that gantry. f n A Each of the four blocks 34 has an upright rod 42 fixed to it, the rod being screw-threaded and passing upwards through its platform 44. A worm wheel is screwed on the rod 42 and rests on a bearing platform. The Iweight of the movable beams 45 is thus transmitted through the rods 42 and wormwheels 35 and borne b the bearing surfaces 48. 'A transverse siaft 49 is supported above andA between each pair of corresponding platforms 44, an intermediate bearing being provided on one of the beams 43.- Each ofthe shafts 49 has a worm 51 near each end to engage with the worm wheels 35' and each shaft is driven by a m0- tor 37 mounted on one of the platforms.

The two belts 36 extendbetween the belt pulleys 38 above the belts .5, means being provided for adjusting. the tension of the elts, such means being also provided in connectionwith the other belts and chains.

The electric motor 37 are arranged to op- 'erate simultaneously. Consequently, when the motors are working, the worm wheels 35, which fit as nuts on the rods 42, will be rotated in unison and, by their screw action, will raise or lower the movable beams 45 with the belts 36 simultaneously, the blocks 34 being slid in the guide members 33. Hence the distance between the upper stretches of the lower belts 5 and the lower stretches of the upper belts 36 can be adjusted in order to suit pipes vof different diameters.

The lower stretches of the belts 36 are arranged to be slack.

Water spraying apparatus40 is supported above the pipes as shown so as to spray water on them for cooling purposes. The water spraying apparatus comprises a series of perforated pipes 4()a which extend across the apparatus so that t-he water may act upon the pipes throughout their lengths.

52, 52 are two swinging jibs each carrying an oil gas burner or burners 53 of known type for heating pipes. Each burner is carried by a trolley 54 movable along the jib So that a wide range of adjustment of the burners is possible. 55 and 56 represent hose for conveyingl the oil and air respectively to the burners. The burners 52 are adapted to project long fiames into the interior of the pipes on the feed rack, or, if desired, on the convey or bands 19. l

.The following is the operation of lining pipes by means of the apparat-us described.

The distance between the upper belts and the lower belts 5 is adjusted as before described to suit the diameter of the pipes to be lined. The electric motor 6 is then started and drives the shaft 2, the pulleys 3 and the `surface 48 on the- 75 lower belts 5 in the direction indicated by the arrow. The motor 39 is started to drive the belts 36 inthe direction indicated by the arrows and at the same linear velocity as the lower belts 5, so that the upper lstretches of the lower belts and the lower stretches of the upper belts are moving in opposite directions at the same speeds.

T he motor 10 is started and drives the shaft.

8, the sprocket wheels 9 and the roller chains 13 on whose upper stretches the beltsI 5 run. The chains 13 move in the same sense as the lower belts 5 but at a very low linear speed in comparison with the speed of said belts, so that there is relative motion between the contacting upper stretches of the belts 5 and of the chains.

Rotation of the sprocketwheels 12 of the roller chains causes rotation of the shafts `11 and of the sprocket wheels 18 whence the feed conveyor bands 19 are driven at lthe same velocity as the chains 13. Similarly the discharge conveyor bands 27 'are driven from the shaft 8 through the medium of the sprocket wheels 26.

When the various bands are in motion as above described, the pipes to be lined, marked 41 throughout, are placed transversely on the feed rack 30 where their ends are plugged by rings and a number of detachable collars or rings are clamped around them to act as guideiianges while on the apparatus. Thereafter the are rolled in succession along the lrack an are caught by the Stoppers 20 of the feed v conveyor bands 19. Herea'fter, for clearness in description, the treatment of one pipe will be described, but it will be understood that thepipes follow one another along the apparatus in quick succession. While on the feed conveyor bands the pipe is heated, for.

instance by the application of an oil or gas flame or flames andis then carried on to the ramps 21 and raised off the bands 19. When a certain distance up the ramps the pipe comes over the arms 23 on the spindle 22. The spindle is rotated either manually or mechanically and the'arms carry the pipe `on to the horizontal parts of the ramps where it is charged with hot bituminous substance in liquid condition. For this purpose, the bituminous substance may be supplied in a heated and liquid conditlon from a reservoir, tank or the like by means of one or more counterweighted ladies, each ladle containino` i measured quantity of the substance which is tippe-:l into the pipe from one or both ends. A period of rest for each pipe .may be arranged-'for during charging but as a rule is unnecessary as the pipe is moving very slowly.

rlihe pipe, after charging, moves off the ramps into engagement with the Stoppers of the feed conveyor whereby it is carried in between the upper and lower belts 36 and 5 and the pipe is deposited on the lower belts which :1re contacting with the roller chains 13.

The mere contact of the pipe with the upper and lowerv belts would only spin the pipe without translating it,but with the arrangement described, each pipe assumes a position between a pair vof adjacent rollers of the chains, the belts 5 sagging below the pipe and accommodating themselves to the curvature thereof. The result is that vwhile being spun rapidlyby the belts to distribute the lining substance centrifugally and also while being cooled, the pipe is being. carried along by the progression of the hollow in which it rests, at the same speed as the chains.

Spinning and translation is continued until lthe lining substance has been uniformly.

distributed over the interior wall of the pipe and while the pipe passes below the water spraying means 40 where it is cooled, spinning in all cases continuing until the lining is hard enough to support itself. y

vOn'reaching the end of the roller chains 13 the pipe is caught bythe Stoppers 28 of the discharge conveyor bands and carried out from between the belts on to the discharge rack 31.

The pipes follow one another in quick succession through the apparatusas long as pipes are fed in, the process being continuous and no handling required.

As before mentioned, the drive of the upper belts 36 is' arranged so that the lower stretches thereof are slack, giving a greater lap of the belts on the pipes.

Instead of heating the pipes while on the feed conveyor they may be heated in a furnace and `'then introduced int-o the spinning apparatus.

The' temperature of the pipes when bemg charged with hot bituminous substance should be somewhat greater than the temperature of the lining substance.

ln the modified form of lining apparatus shown in Fics. 3 and'll, the lower belts 5 are dispensed with, the pipes resting'directly on the rollers of the roller chains 13 by which they are carried along, the hollewsvbetween the rollers forming .cradles for the pipes in which they are spun by the action of the upper belts 86 which travel at a greater linear speed than the chains 13 and their lower stretches move in the same direction as the upper stretches of the chains. iin this modiication, in the drawings of which the same reference numerals as used for the first form of the invention, Figs. 1 and 2, are used, the discharge conveyor has been also dispensed with.

lt will be appreciated that pipe lining ap# paratus according to this invention'is susceptible of numerous variations. There may e any practicable number of upper belts and lower belts and chains. For treating pipes of varying diameters, the Stoppers on the various conveyors may be adjustably secured on the endless bands. instead of a number of ramps 21 being provided, one only,'located at one side of the feed conveyor, ma be used so that the pi es on being carrie on to the ramp, are tiited to facilitate charging.

After the application of the cooling Water from the spraying means, the pipes may be subjected to the action of rotaryor other belts moving brushes in lorder to clean and dry their eX- terior surfaces. l

Preferablythe belts, roller chains and feed and discharge conveyors are arranged to be slightly inclined, the feed end being higher than the discharge end. `4

1. Apparatus for centrifugally lining iron and steel pipes with a liquid bituminous substance, comprising continuously running lower travelling members, upper travelling members moving continuously with a linear velocity different from that of the lower travelling members, and means for feeding said pipes after they have been charged with liquid bituminous substance in between the upper and lower travelling members where they are translated by the lower members and spun simultaneously about their own axes by .the co-action of the upper and lower members to distribute the bituminous substance as a lining uniformly over `their interior surfaces.

2. Apparatus for centrifugally lining iron and'steel pipes with a liquid bituminous substance, comprising a plurality of continuously running endless, power driven roller chains moving parallel to each other in the same sense, a plurality of continuouslyrunning endless, power driven belts moving parallel to each other in the same sense and so that their lowerstretches move above the chains with a linear velocity different from that of the upper stretches of said chains, and means for feedin thepipes after they have been charged'with liquid bituminous substance on to the chains and in` between the chains and the belts so that the chains translate the pipes and the co-actionof the chains and belts spin the pipes about their own axes to distribute the bituminous substance as a. lining.

3. Ap aratus for centrifugally lining iron and stee` pipes'when chargedwith a liquid bituminous substance comprisin a plurality of continuously running en less, power driven roller chains moving .parallel to each other and in the same sense, a plurality of continuously'running endless, power driven (parallel to each other in the same sense an so that their lower stretches move above the chains with a linear velocity different from that of the upper stretches of said chains, means for feedin the pipes after they have been charged with ituminous substance on to the chains transverse to which they lie and in between the chains and belts for simultaneous translation and spinning to distribute 'the bituminous substance, and means for moving the belts bodily towards and awa fromthe chains to accommodate pipes of iiierent dlameters.

4. Apparatus for centrifugally lining iron and steel pipes with a liquid bituminous substance, comprising means for heating the pipes before being charged, a plurality of continuously running endless, power driven roller chains moving pa'rallel to each other and in the same sense, a plurality of continuously running endless power driven belts moving (parallel to each other in the same sense an above the chains with a different linear velocity from the upper stretches of the chains, means for feeding the pipes after they have been charged with the liquid bituminous substance on to the chains and in between the chains and belts for simultaneous translation and spinning to distribute the bituminous substance, means for cooling the pipes while still being spun, and mechanism for moving the belts bodily towards and away from the chains to accommodate pipes of different 'diameters.

5. Apparatus for centrifugally lining iron and steel pipes wl'en charged with a liquid bituminous substance, comprising a plurality of endless, power driven roller chains moving parallel to each other in the same-sense, a plurality of endless, power driven vbelts moving parallel to eachother in the same sense and so that their lower stretches .move above the chains with a linear velocity dif ferent from that of the upper stretches of the chains, a number of parallel endless bands forming a conveyor for feeding the pipes on to the chains and in between the chains and the belts where they are translated bodily and simultaneously spun about their own axes to distribute the bituminous substance, and stationary ramps on to and over which the pipes are carried when being `charged with the liquid bituminous substance.

r 6. Apparatus for centrifugally lining iron and steel pipes when charged with a liquid bituminous substance, of endless, power driven roller chains moving parallel to each other in the same sense, a plurality of endless, power driven belts moving' (parallel to each: other in the same sense an so that their lower stretches move above the chains with a linear velocity dif-v ferent from that of theupper stretches of the chains, a number of parallel endless bands forming a conveyor for feeding the pipes on to the chains and in between the chains and the belts where they-are transso that their lower stretches move comprising a plurality` lated bodily and simultaneously spun about accommodate pipes of different diameters.

nil

and steel pipes when charged memes 7. Apparatus for centrifugallg lining iron jith a liquid bituminous substance, comprising means for heating the pipes before being charged, a plurality of endless, power driven roller chains moving parallel tok each other in the same sense, a plurality of endless,` power driven belts moving parallel to eachother in the same sense vand so that their lower stretches move above the chains with a linear velocity diierent from that of the upper stretches of the chains, a number of parallel endless bands forming a conveyor for feeding the pipes on to the chains and in between the chains and the belts where they are translated bodily and simultaneously spun about their own axes to distribute the bituminous substance, stationary ramps on to and o ver which the pipes are carried when rbeing charged with the 'liquid bituminous substance, mechanism for moving the belts bodily towards and away from thechains to accommodate pipes of dierent diameters, and means for cooling the pipes while still being s un.

p8. Apparatus for centrifugally. lining iron and steel pipes'when `charged with a liquid bituminous substance, comprising means for' heating the pipes before being charged, a plurality of continuously running endless, power driven roller chains moving parallel to each other in the same sense, a.pliirality of continuously running endless, power driven belts moving parallel to each other in the same sense and so that their lower stretches move over the chains with ya different linear velocity frpm that of the upper stretches of the chains, means for feeding the pipes, charged with the bituminous substance -in liquid condition, on to the chains and in between the chains and the belts where they are translated bodily and simultaneously spun to distribute the bituminous substance, supports for said belts, housings ,A in which said supports are slidable so that the supports can be moved together to move the belts and to vary the distance between the belts and the chains, and means for cooling the pipes while still being spun.

9. Apparatus for centrifugally lining iron and steel pipes when charged with a liquid bituminous substance, comprising a plurality of continuously running parallel endless, power drfiven roller chains moving in the same sense, a plurality of continuously running parallel, endless, power driven belts moving in the same sense and so that their lower stretches move above the chains with a linear velocity different from thatof the upper stretches of the chains, a number of parallel endless bands forming a conveyor for feeding the pipes after they have been charged with liquid bituminous substance on to the chain's and in between the chains and belts for simultaneous translation bodily and spinning about their own axes, stationary.

ramps on to and over whichv the pipes are carried, supports forsaid belts, and housings in which said supports are slidable so that the 'supports can be moved together `to moveA the belts and to vary the distance between the belts and-the chains.

10. Apparatus for centrifugally lining iron and steel-pipes when charged with a,

liquid bituminous substance, comprising means for heating the pipes before being charged, a plurality of parallel endless,

power driven roller chains moving in the sameY sense, apluiality of parallel, endless,y

a conveyor for feeding the pipes on to the chains and in between the chains and belts for simultaneous translation bodily and spinning about their own axes, stationary ramps on to and over which the pipes are carried when being charged,supports for said belts,

housings in which said supports are slidable so that the supports can be moved together to move the belts and to var the distance between the belts and the chains, Aand means for cooling the pipes while still being spun. v 11. Apparatus .forf centrifugally lining iron and steel pipes when charged with a liquid bituminous substance, comprising Vmeans for heating the pipes before being charged, a plurality of parallel endless,

power driven roller chains moving in the same sense, a pluralityof parallel, endless,

power driven b elts movingin the same sense and so that their lower stretches move above the chains with alinear velocityv different from` that of the upper stretches of the chains, a number of parallel endless bands forming a conveyor for feeding the pipes on to the chains and in between the chains and belts for simultaneous translation bodily and spinning about their own axes, stationf ary charging ramps on to and overwhich the pipes are carried before spinning, supports for said belts, housings in which said supports are slidable so that the supports can be moved together to nieve the belts and to vary the distance between the 'belts and the chains, and means for spraying watertupon the pipes after distribution of the bituminous substance by spinning and while the pipes are still spinning.

12. Apparatus for centrifugally lining iron and steel pipes when charged with a liquid bituminous substance, comprising a plurality of parallel endless, power driven roller chains moving'in the same sense, a plurality of parallel, endless, power driven belts moving in the saine sense and so that their lower stretches move above the chains with a linear velocity dierentl from that of the upper stretches of the chains, a separate power driven lower belt extending. around each roller chain with yits upper stretch resting slackly thereon, andfmeans'for feeding the pipes on to said lower belts which-sag thereunder and form hollows between the rollers of the chains, ythe pipes being translated bodily by the progression of -said hollows wherein they are simultaneously spun about their own axes by' the co-action of the differentially moving upper and lower belts, to distribute the bituminous substance as a lining'.l

13. lApparatus for centrifugally lining iron and steel pipes when charged with a liquid bituminous substance, comprising a plurality of parallel, endless power driven roller chains moving in the same sense, a-

plurality of parallel, endless, power driven belts movingin the same sense and so that their lower stretches move above the chains with alinear velocity different from that o'f the upper stretches of the chains, a separate power driven lower belt extending around each roller chain with its upper stretch rest-l ing slackly thereon, means for feeding the pipes on tosaid lower belts which sag thereunder and form hollows between the, rollers of the -chains, the pipes being translated bodily by. the progression of said hollows wherein they are simultaneously spun about their own axes by the coaction of the differentially moving upper and lower belts,

to distribute the bituminous substance as a lining, and mechanism for moving the upper belts bodily towards `and away from the lower belts. f

14. Apparatus for centrifugally lining iron and steel pipes when charged with a liquid bituminous substance, comprising .the progression of whlch hollows the pipes are translated bodily while being spun about` means for'heating the ipes before being charged, a plurality of) parallel, endless, power driven roller chains moving in the same sense, a plurality of parallel, endless, power driven belts moving in the same sense and so that their lower stretches move above the chains with a linear velocity different ,from that of the upper stretches of the chains, a separate power driven lower belt extending around each roller chain with its upper stretch resting slackly thereon, means for feeding the pipes charged with liquid bituminous substance on to said lower belts which sag thereunder. and form hollows between the rollers of the chains, the pipes being translated bodily by the progression of said hollows, wherein they are simultaneously spun about their own axes by the co-action of the differentially moving upper and lower belts, yto distribute the bituminous substance as .a lining, mechanism for `moving the .upper belts bodily towards and away from the lower belts, and means for. cooling the pipes while Still being spun.

15. Apparatus for centrifugally lining iron and steel pipes when charged with a rality of upper. parallel, endless power driven belts moving in the same sense and so that their lower stretches move above the chains with a linear velocity different from that of the upper stretches of the chains, a separate power driven lowerbelt extending around each roller .chain with its upper stretchresting slacklyl thereon, a number of parallel endless bands forming a conveyor .for feeding the charged pipes on to said lower belts which sage lthereunder and form hollows between the rollers of the chains, bythe progression of which hollows the pipes are translated bodily While being spun about their own axes by the co-action of the differentially moving upper and lower belts, and stationary ramps on to and over which the pipes are carried for charging with the liquid bituminous substance before spinning.

16. Apparatus for centrifugally lining iron and steel pipes when charged-with a liquid bituminous substance, comprising a pluralit of parallel, endless, power driven ,roller `chains moving in the same sense, a plurality of upper parallel, endless, power driven belts moving in the same sense and so that their lower stretches move above the chains with a linear velocity different from that of the upperstretches of the chains, a separate power driven lower belt extending` around each roller chain with its upper stretch resting slaclly thereon, a number of parallel endless bands forming a conveyor for feeding the charged pipes onv to said lower belts which sag thereunder and form hollows between the rollers of the chains, by

17'. Apparatus fo'r centrifugally lining iron and steel pipes when charged with a liquid bituminous substance, comprising means `for heatin the pipes before being charged, a plurtlity `of parallel, endless, power driven roller chains moving in the same sense` a` plurality of upper parallel, endless power'driven belts moving in the same ense and so that their lower stretches move above Ithe chains with a linear velocity different from that'of the upper stretches of the chains, a separate power driven lower belt extending around each roller chain with its upper stretch resting slackly thereon, a number of parallel endless bands forming a conveyor for feeding the charged pipes on llO Lacasse to said lower belts which sag thereunderand form hollows between the rollers of the chains, by the progression ot which hollows the pipes are translated bodily while being spun about their own axes .by the co-actiony of the dilierentially moving Aupper and lower belts, stationary ramps on to and over which the 'pipes are carried tor charging with the liquid bituminous substance before spinning, mechanism 'for moving the upper belts bodily towards and away trom the lower belts, and means for cooling the pipes lwhile still being spun.

18. Apparatus 'for centrifugally lining iron and steel pipes when charged lwith a liquid bituminous substance, comprisingv a plurality of parallel, endless, power driven roller chains moving in the same sense, a plurality of upper parallel, endless, power driven belts moving in the same sense and so that their lower stretches move above the chains with a linear velocity diiierent `from that ot the upper stretches of the chains, a separate power driven lowerbelt extending around each roller chain with its upper stretch resting slacltly thereon, means for feeding the pipes charged with bituminous substance in liquid condition on to said lower belts which sag thereunder and form hollows between the rollers of the chains, by the progression of which hollows the pipes are translated bodily while being spun by the co-action of the diderentially moving upper and lower belts, supports 'for the upper belts and housings in which said supports are slidable so that the supports can be moved together to move the upper belts bodily towards and away from the lower belts.

19. Apparatus tor centrifugally lining iron and steel pipes when charged with a liquid bituminous substance, comprising means tor heating the pipes betere being charged, a plurality of parallel, endless, po wer driven roller chains moving in the same sense, a plurality of upper parallel, endless, power driven belts moving in the same sense and so that their lower stretches move above the chains with a linear velocity dili'erent from that of the upper stretches ot the chains, a separate power driven lower belt extending around each roller chain with its upper stretch resting slackly thereon, means for feeding the pipes charged with the liquid bituminous substance on to said lower belts which sag thereunder and form hollows between the rollers ot the chains, by the progression of which hollows the pipes are translated bodily while being spun by the co-action ot the diierentially moving upper and lower belts, supports for the upper belts, housings in which said supports are slidable so that the supports can be moved together to move the belts bodily towards and away from the lower' belts, and means for cooling the pipes while still being spun.

plurality of upper parallel, endless, power drivenbelts moving in the same sense and so that their lower stretches move above the.

chains with alinear velocity different from that of the upper stretches of said chains, a separate power driven lower belt 4extending around each roller chain with its upper stretch resting slaclrly thereon, a number of parallel, endless bands 'forming'a feed `conveyor for 'feeding thecharged pipes on to said lower belts which sag thereunder and form hollows between the rollers of the chains, by the progression oi' which hollows the pipes are translated bodily while being spun about their own axes by the co-action of the diderentially moving upper and lower belts, stationary ramps on to and over which' the pipes are carried 'for charging with liquid bituminous substance before spinning, supports for the upper belts, and housings in which said supports are slidable soI that the upper belts can be moved bodily towards and away from the lower belts. p

21. Apparatus tor'centrifugally lining iron and steel pipes when charged with a liquid bituminous substance, comprising means for heating the pipes before being charged, a plu rality ot parallel, power driven, endless roller chains moving in the same sense, a plurality of upper parallel, endless, power driven belts moving in the same sense and so that their lower stretches move above the chains with a linear velocity dide'rent from that of the upper stretches of said chains, a separate power driven lower belt extending around each roller chain with its upper stretch vresting slachly thereon, a number of parallel, endless bands forming a feed conveyor 'tor feeding the charged pipes on to said lower belts which sag thereunder 'and form hol# lows between the rollers of the chains, by the progression of which hollows the pipes are translated bodily while being spun about their own axes by the co-action of the dierentially moving upper and lower belts, stationary ramps on to and over which the pipes are carried for charging with the liquid bituminous substance be'ore spinningfeupports for the upper belts, housings in which vsaid supports are slidable so that the upper belts can be moved bodily towards and away from the lower belts,'and means :tor cooling the moving inthe same lsense'andso that their lower stretches move above the chains with a linear velocity diferentfrom that o the y upper stretches of said chains, 'a vseparate power driven lower belt extending around eachroller chain with its up er stretch rest'- ing slackly thereon, a number of parallel, endless bands forming a. feed conveyor for feeding thecharged pipes on to said lower 10 belts which sag thereunder and form hollows between the rollers ofI the chains, by v the progression of which hollows the pipesy are translated bodil while being spun about their own axes by the coaction of the differentially moving upper and lower belts, stationary ramps on to and over which the pipes are carried for charging with the liquid bitu- .minous substance before spinning, supports for the upper belts, housings-in which said supports are slidable so that the upper belts can be moved bodily towards and away from the lower belts, and means for sprayin water upon the pipes after lining and while still being spun. In testimony whereof I ailix my signature.

CHARLES G. ATHA.

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