US1998911A - Pipe wrapping machine - Google Patents

Description

A ril 23, 1935. 1.. s. ROSENER PIPE WRAPPING MACHINE Filed Aug. 4, 1930 8 Sheets-Sheet 1 INVENTOR.

m ZZZ/4N0 5. 55 1 52 BY 5% 62 ,v/s ATTORNEY v April 23, 1935. Lfs. ROSENER 1,998,911

PIPE WRAPPING MACHINE Filed Aug. 4, 1950 8 Sheets-Sheet 2 INVENTORQ 4 4-2 /va 5: eoss/v'z BYWJM H/S ATTORNEY April 1935 L. s. ROSENER PIPE WRAPPING MACHINE Filed Aug. 4, 1930 8 Sheets-Sheet 3 H mm N E5 m M w A 5 D NM H M 5% v B W N, Y Q vww ww mwb a \N hm QW M @w w 99 b {mull- Mu. m lhl m vmm NM.

April 1935- 1.; s. ROSENER. 1,998,911

PIPE WRAPPING MACHINE 19/5 ATTORNEY L. s. ROSENER PIPE WRAPPING MACHINE April 23, 1935.

8 Sheets-She et 7 Filed Aug. 4, 1930 INVENTOR. (El/4ND 5. ase/vse HIS ATTORNEY April 23, 1935.

8 Sheets- Sheet- 8 Filed Aug. 4; 1930 fllulfilliall m IL HHHWfW Q W l 3 m t a :i 0 WQ 7 J w w 3 a w m wmmw/ -WTT i-.. 1-- T b i f 2 i w M a 6% X. HA5 ATTORNEY Patented Apr. 23, 1935 UNITED STATES PIPE WRAPPING MACHINE Leland S. Rosener, San Francisco, Calif., assignor to The Paraifine Companies, Inc., San Francisco, Calif., a corporation of Delaware Application August 4, 1930, Serial No. 472,858

8 Claims.

My invention relates to a pipe wrapping mav chine, and particularly to a machine in which the wrapping of many pipes may be effected with a minimum loss of time.

It is among the objects of my invention to provide a pipe wrapping machine in which pipes are wrapped with a strip of. protective material; provision being made for applying an adhesive waterproof fluid to hold the wrapping in place, thus sealing the pipe with an impervious covering which is moisture and decay-proof.

Another object of my invention is to provide a pipe wrapping machine in which a plurality of pipes are successively moved into a wrapping position, so that while one pipe is being wrapped a completed pipe may be removed from themachine and replaced with another to be wrapped;

the process of wrappi g thus'being a substantiallycontinuous operation.

Further objects of my invention include the provisionfin a pipe wrapping machine of the character described, of centralized controls for governing the operation of the machine, of quick-acting means for renewing the supply of wrapping material, and of improved means for app ying an adhesive fluid to secure the wrapping on the pipe.

The invention possesses numerous other objects and features of advantage, some of which, with the foregoing, will be set forth in the following description of my invention. It is to be understood that I do not limit myself to this disclosure of species of my invention, as I mayadopt variant embodiments thereof within the scope of the claims.

Referring to the drawings:

Figure 1 is a plan view showing the right-hand portion of the pipe wrapping machine embodying my invention; and

Figure 2 is a similar view showing the left hand portion of the machine. I

Figure 3 is a side elevation of the machine portion shown in plan by Figure 1; and

Figure 4 is a side elevation of portions of the machine shown in plan by Figure 2.

Figure 5 is a detail vertical sectional view of the tailstock mounting, taken in a plane indicated by the line'5- 5 of Figure 4; the scale being larger than that of Figure '4 to disclose the construction more clearly.

Figure 6 is a vertical sectional view of the machine, taken in a plane indicated by the line G6 of Figure 2; the tail'stock and carriage being shown in end elevation.

Figure 7 is perspective detail view showing the fluid sprayer, taken in a direction indicated by the arrow 1 of Figure 6; portions of the sprayer are shown in section to disclose the construction.

Figure 8 is a vertical sectional view taken thru the tailstock; the plane of section being indi- I cated by the line 8-8 of Figure 2.

Figure 9 is an end elevation of the headstock, taken in a'direction indicated by the arrow 9 of Figure 1.

Figure 10 is a detail horizontal sectional view 10 showing one set of the thrust rollers; the plane of section being indicated by the line "-40 of Figure 11.

Figure 11 isa vertical sectional view taken thru the headstock; the plane of section being indil6 cated by the line IIH of Figure 9.

Figure 12 is an end view of one of the pipesupports, taken in a direction indicated by the arrow i2 of Figure 11.

t Figure 13 is a side view of one of the pipe centering studs, taken in a direction indicated by the arrow 13 of Figure 12; and

Figure 14 is a horizontal sectional view thru the same, taken in a plane indicated by the line u-ja of Figure 13.

Figure 15 is a diagrammatic view of the con-' trol circuits.

In terms of broad inclusion, the pipe wrapping machine embodying my invention comprises a frame supporting a pair of rotors mounted in adjustably spaced relationship. Each of the rotors are provided with iournaled means for supporting the ends of a plurality of pipes, so that. the pipes extend longitudinally between the rotors in a mutually spaced and parallel position. The pipe supporting means on one of the rotors is also preferably adjustable to assist in accommodating pipes of different sizes, and to effect the engagement of the supporting means.

A carriage, for carrying a strip of wrapping material, is mounted on the frame for movement in a path parallel'with the axes of the pipes; and means, preferabb' electrically controlled, are provided for moving the carriage in either direction along the pipe. Means, also preferably electrically controlled, are provided for varying the speed of the carriage. The strip of wrapping material is preferably provided in a plurality of v rolls, mounted on the carriage by a rotatable support, so that the supply, or wrapping material may be renewed quickly; Means, preferably mounted on the carriage, arealso provided for emersing the strip in a heated waterproof adhesive fluid, and for spraying a similar fluid on the pipe to be wrapped.

Means, preferably electrically controlled, are provided for simultaneously rotating the rotors to successively move the pipes adjacent the path of movement of the carriage. Means are also provided for rotating the adjacently positioned pipe about its own axis, so that this rotation,

together with a simultaneous movement of the carriage alongside the pipe, effects a spiral wrapping of the strip material on the pipe. Means are provided for varying the speed of rotation of the pipe being wrapped; and a varying of this speed, or a varying of the carriage speed, or both, may be used to control the angle of pitch of the spiral wrapping. In the preferred form of my invention, a plurality of three pipes are arranged in their demountable positions between the rotors. 'While one of the pipes is being wrapped the rotors and remaining two pipes are free from rotation, and a completed pipe may be removed and replaced by.

another to be wrapped; this process being repeated so that the wrapping is carried on as a substantially continuous operation.

In greater detail, the pipe wrapping machine embodying my invention is supported by a frame 2 mounted on a suitable foundation 3. Arranged in fixed position near one end of the frame is a headstock 4, and movably mounted near the other end of the frame is a tailstock 8. Adjacent the outer end of the headstock 4 is an operators platform I, and a motor platform 8; the steps 8 and H permitting access'to the platforms 1 and 8 respectively. This general arrangement is best shown in Figures 1 to 4 inclusive.

Referring principally to Figures 9 and 11, the

headstock 4 is substantially in the form of a.

housing, having a demountable upper section l2 held secured by the bolts l3. Journaled in the headstock is a spool-shaped rotor l4. The journal for the rotor is provided by a plurality of rollers ii circumferentially disposed about the peripheries of the rotor spool flanges. Twin sets of these rollers are journaled in pairs, in the rocker arms l1 pivotally mounted in lower portions of the headstock, to provide a cradle for the rotor l4. Another set of the rollers I8 is Journaled in the upper section l2, and serves to bear on the top portions of the rotor to provide a closed journal.

It is to be noted that the rotor may be lifted out of its journal mounting by merely removing the demountable section I2. Endwise movement of the rotor I4 is prevented by the thrust rollers l8, journaled in the headstock and adapted to bear on both sides of the rotor spool flanges. The

arrangement of these thrust rollers is indicated in Figure 11, and a detail showing of one set of these rollers is made in Figure 10.

Means are provided for rotating the rotor l4. This is preferably accomplished byan annular worm gear I! mounted on one of the rotor spool flanges. A shaft 2!, journaled in the lower portion of the headstock, carries a worm 22 meshed with the rotor gear l8; and rotation is imparted to the worm shaft 2| by an externally mounted shaft 23, thru the beveled gears 24. The shaft 23 is connected by the gears 25 to a power shaft 28, which is driven by a motor 21 thru a suitable speed reduction gearing 28. A magnetic clutch 28, interposed in the shaft 23, serves to control the rotation of the rotor; and since the speed of rotation of the rotor is not rapid, it may readily be adjusted to a predetermined angular position.

Means are provided on the rotor l4 for rotatably supporting the ends of a plurality of pipes 3| to be wrapped. A plurality of shafts 32, three being shown, are journaled in the rotor l4 in the rotor spool flange bearings 33; these shafts being equally spaced about a circle concentric with the rotor axis, so that when the rotor is rotated the shafts, and consequently the pipes 3|, will follow a predetermined circular path. The forwardly projecting ends of these shafts, those ends which are directed to the tailstock 8, are provided with means for engaging the pipe ends; and the rearwardly projecting ends of the shafts are provided with a clutch drive. This drive is effected by a shaft mounted loosely journaled gear 34, held against axial movement by a shaft flxedcollar 38.

Suitable clutch means 31 are provided on the loose gear 34; and a clutch collar 38, slidably mounted for rotation with the shaft 32, is adapted to engage the clutch means 31 for locking the loose gear and shaft for rotation together. A shaft fixed collar 38 serves to limit the outward movement of the clutch collar 83. The clutch is preferably actuated by manually operated means. For this purpose, a hand lever 4| is pivoted on the rear exposed face of the rotor l4. ring 42, engaging an annular groove formed in the clutch collar 38, is pivoted in a frame portion of the hand lever 4|.

By this arrangement, the clutch may be optionally engaged or disengaged at the will of an' operator; and since the rotor I 4 moves comparatively slowly, this operation may be readily effected either when the-rotor is stationary or when it is being rotated. This permits any one of the journaled pipe supporting means, and consequently any one of the pipes 3|, to be rotated at any time. Rotation is imparted to the loose gears 34 by a master gear 43 mounted for rotation on a shaft 44, having one end journaled in the frame 2 and the other end journaledin an axial aligned rotor fixed journal 46.

Rotation of the master gear shaft 44 is effected by the drive shaft 23 thru a pair of speed change transmission mechanisms. The gears 41 connect the master gear shaft 44 to a frame journaled shaft 48 carrying a series of gears 49. Thse gears are adapted to be optionally engaged by a series of shiftable complementary gears 5| slidably mounted for rotation on a frame journaled shaft 52. A frame mounted hand lever 52 provides a convenient means for shifting the slidable gears 5|. The extended shaft 52 also carries a shiftable clutch sleeve 54 optionally engageable with either of a pair of gears 56 and 51 loosely mounted on the shaft 52. These loose gears are meshed with a pair of connected gears 58 mounted on a frame journaled jack shaft 59. A frame mounted hand lever 8| provides a convenient means for shifting the slidable clutch sleeve 54.

Connection with thedrive shaft 26 is completed thru a gear 52 mounted for rotation with the gear 51, and a gear 63 loosely mounted on the drive shaft and meshed with the gear 62. A magnetic clutch 64 interposed between the loose gear 53 and the drive shaft 26 serves as a control for completely cutting off the drive to the speed change transmissions. It has been found convenient to choose the gear ratios in the transmissions so that the speed of rotation of the pipe supporting means, and consequently the pipes, may be varied thru speeds ranging from say 5 to 50 R. P. M.; this range being conveniently stepped thru the six speed changes provided.

A split The journaled pipe supporting shafts 32 are provided with means forv readily engaging the ends of the pipes 3| to be wrapped. Referring to Figure 11, two different types of engaging means are shown. The projected end of the upper pipe supporting shaft 32 is shown carrying a removable collar 86 mounted for rotation with the shaft. A conical cap 61 is fixed on the collar, and serves to engage the end of a pipe. Due to its conical shape this engaging means automatically centers the pipe, and is preferably used for the smaller sized pipes.

For the larger diameter pipes, the engaging means shown on the other supporting shaft is preferably used. A collar 68 is demountably arranged for rotation with the shaft 32, and a face plate 89 is fixed on the outer end of the collar. A series of radial slots II are provided in the face plate, and a beveled stud I2 is adiustably mounted in each slot. The stud is held slidably adjustable by a ribbed washer I3 and bolt 14. As shown in Figure 12, a series of concentric circles 16 are inscribed on the face plate to assist in setting the studsto center the pipe; these guide circles are shown marked for pipes ranging in diameter from 18 to 36 inches. When the studs are adjusted they engage the inner rim of the pipe. The other ends of the pipes to be wrapped are held by the tailstock 3. Except for certain details, the tailstock is of substantially the same construction as the headstock 4; and where substantial duplications in construction exist, these elements are similarly designated in both headstock and tailstock. Instead of being fixed on the frame 2 however, as is the headstock, the-tailstock 8 is movably mounted. This is effected by providing a pair of rails 11 on the frame 2, and mounting the tailstock on the rails by suitable wheels I8; the brackets 19 being mounted on the tailstock to slidably engage the frame 2 for added stability.

Referring principally to Figures 5 and 8, movement of the tailstock 6 along the rails 11 is controlled by a hand crank Ill conveniently positioned at the outer end of the tailstock. The crank is mounted on a shaft 8| journaled in the .tailstock. and carrying a worm 82 meshed with a worm gear 83. The worm gear is mounted on a shaft 84, also iournaled in the tailstock, carrying a spur gear 36 meshed with a rack 81 fixed on the frame 2. By this arrangement, it is aparent that a rotation of the crank will impart a movement to the tailstock along the rails 11. This adjustment of the tailstock position permits the machine to accommodate pipes of various lengths; and the reduction in the gearing of the tailstock moving means is suflicient to hold the tailstock against movement after being set in a selected position.

Means are provided on the tailstock rotor for supporting the pipes 3|. As best shown in Figure 8, a plurality of shafts 88 are slidably mounted in the journals 89 formed in the inner flange of the tailstock rotor spool. The shafts are held against rotation about their own axis by the shaftkeys Qt; and are spaced about the tailstock rotor in the same manner that the shafts 32 are spaced about headstock rotor. Thus, the pipes 3| extend longitudinally between the headstock and tailstock in a mutually spaced. and parallel relationship.

The pipes 3| are held by the slidable shafts 88 by means of suitable engaging means; and these means may conveniently be of the same'general type as those described in connection with the headstock. In case of the tailstock engaging means, however, rotatable means are provided.

of the carriage drive chain H2.

In one type, the cone-shaped cap 6? is mounted to freely run on the ball bearing 92; and inthe other type, the face plate 69 is mounted to freely rotate on the bearing 93.

Means are provided for extending and retracting the shafts 88 to permit engagement of the engaging means with the pipes 3|, and also assist in accommodating various lengths of pipes. A flanged sleeve 34 is journaled in the bearing '98 formed in the outer fange of the tailstock rotor spool, and is held against endwise movement by a sleeve fixed collar 31. The rearwardiy-projecting end 98 of the shaft 88 is threaded into the sleeve 94, and a hand wheel 93 is secured on the outer end of the sleeve 94 to provide means for actuating the slidable shaft 88. By this arrangement, a plurality of pipes 3| may readily be mounted in, or demounted from, the supported position between the headstock 4 and tailstock 6.

Means are provided for rotating the tailstock rotor simultaneously with the headstock rotor. The shaft 23, which extends thru the headstock gear box llll, continues along the length of the machine supportedby the frame brackets I02. A portion of the shaft 23, adjacent the'tailstock 6 and passing thru the tailstock gear box I03, is provided with a keyway IN. This keyway is slidably engaged by the keyed gear I", corresponding to one of the gears 24 in the headstockgear box ||l|. This permits the tailstock rotor to be rotated withcutinterfering with the tailstock movement.

Means are provided for covering the pipes with a helical wrapping; and means are also provided for adhesively securing the wrapping to provide a protective covering which is moisture and de cay-proof. A portion of the frame 2 supports a pair of rails I01 running along the length of the machine, and extending parallel with the pipes 3|. A carriage I, provided with suitable wheels ID! for travel along the rails il'l, is adapted to i move back and forth alongside the pipes; the

, path of movement of the carriage being, of course,

axis of the pipes.

parallel with the either direction, is imparted to Movement, in

the carriage by a downwardly projecting finger IH engaging an endless chain 2 running in the channels H3 provided between the rails I01. This arrangement is best shown in Figure 6. Reerring particularly to Figures 1 and 2, the chain M2 runs over a pair of spaced sprockets us mounted on the frame 2. One of these sprockets is loosely journaled in a pair of adjustable bearings 556;; this adjustment providing means for tensioninlg the drive chain H2. The other sprocket is fined for rotation on a frame journaled shaft Ht. Means are provided for running the drive chain in either direction. A beveled gear H8 is mounted on the sprocket shaft ill, and meshes with a pair of beveled pinions I I8 mounted on a frame journaled shaft |2|. Another shaft I22 is journaled in the frame 2, and has loosely journaled thereon a pair of gears i221! meshed with a complementary pair of gears 823 mounted for rotation with the pinion shaft 32 5. Either oi the loose gears I23 may be optionally locked tor Gill rotation with their journal shait l2? by means of a pair of magnetic clutches |28 interposed between the shaft and the loose gears.

Means are also provided for varying the speed For this purpose an ordinary Reeves speed change is preferably used, comprised essentially of a twin pair oi sep= arable cone pulleys i2? between which a V-s'iiaped belt I28 runs. A low-speed reversible motor i251 conveniently provides a means for controlling the spread of the cone pulleys I21 to vary the speed. One of the shafts I II of the speed change is connected to the shaft I 22 of the traverse mechanism by a suitable chain drive I32; and the other shaft III is connected with the drive shaft ll by a suitable chain drive Ill.

Means-learned by the movable carriage Ill, are provided app a protective covering on the, pipe; Referring principally to Figure 2, a

I", for holding a supply of suitable waterfiuid, is mounted on the carriage to swing about a suitable pivot I11. Means for adjusting the angular position of the tankill is provided by a hand wheel Ill conveniently aronan operator's platform I" of the carwe I .8; the steps Ill permitting access to this platform. Suitable gears Ill and a shaft ll! cooperating with a segment gear Ill on the tank furnish means for swinging the tank about its pivot when the hand wheel Ill is turned. The

, reduction in the gearing is suiiicient to prevent further movement of the tank after it has been set in a preselected position.

A bracket Ill is secured on the rear of the tank Ill, and carries the spools Ill secured on a shaft 1. A plurality of supply rolls Ill of a wrapping strip Ill are removably iournaled, pref- A spring pressed catehIlI is'adapted to engage suitable recesses III in one of the spools, and serves tohold the supporting spools in a given position.

As the strip material Ill is drawn the upper roll, it is threaded through a frame Ill iournaled on the bracket Ill. A counterweight Ill operates to rotate the frame III for retarding the strip movement. The strip Ill then passes under -a roller Ill, over a roller I", both mounted on the top of the tank I3l,'and then is directed under a roller I51 mounted within the tank. A rack rod Ill, slidable in a tank mounted guide tube I" provides a mounting for the tank roller I51. Adjustment of the position of this roller within the tank is effected by a suitable gear arrangement, cooperating with the rack rod III, operated by; chain drive Ill and hand crank Ill.

As the strip Ill emerges from the tank it passes over an adjustable roller Ill mounted on the guide tube I" on a suitable bracket Ill. After passing off this roller, the strip is wrapped on oneof the pipes II, viz., that pipe which has been rotated by the rotors Il into a position adjacent the path of carriage IIII. If it is desired not to pass'the strip Ill into the tank Ill, the strip may follow a course, indicated by the dotted line I, from under the roller Ill directly over the adjustable roller- Ill and then to the pipe to be wrapped.

A suitable waterproof adhesive, such as a bituminous material, is placed in the tank I" to coat the strip. The material is kept in a heated fluid state by the heater tubes I61 extending into the tank. The burners Ill, fed by a suitable source of fuel I I, are positioned to discharge their flames into the heater tubes. This heating process permits the bituminous fiuidto readily penetrate the submerged fibrous strip. As a resuit, the strip is saturated and coated, and isin a condition to adhere to the pipe when it is applied as a wrapping. a

Means are also provided for applying a coating of the adhesive material on the pipe prior to the wrapping. This is preferably effected by a suitable sprayer mounted on the carriage IIII. A pair of standards "I are arranged on the carriage, one on each side of the pivoted tank Ill. The upper portions of these standards are bent forward, and are connected by a journaled cross bar I12. A pair of arms I18 are slidably mounted for adjustment on the cross bar I12, and carry a cylindrical chamber I1l between their forward ends. The chamber I" is eccentrically welded on an inlet tube I16 and on an outlet tube I11, both mounted on the forward ends of the arms I13 for limited rotation therein.

The adhesive fluid from the tank I" is fed to the inlet tube I18 of the chamber I", through a flexible conduit I18, by a suitable pump I located in the tank. A motor Ill, driving through a reduction gear I", operates the pump. In order to function as a sprayer, the chamber I" is provided with a series of slots or discharge orifices I". A handle I ll, fixed on the chamber I1l, offers a means for rotating the chamber about its eccentric journal to adjust the position of the discharge orifices Ill. A flexible conduit I", communicating with the outlet tube I11 of the spray chamber I1l, discharges back into the tank Ill, and provides an overflow for the chamber.

the slidable arms I13, it may be extended or retracted to permit adjustment relative to the adiacently positioned pipe. To facilitate this ad- Justment, means are also provided for swinging the arms I11 about the axis of the cross bar I12. A handle bar I" is mounted on one end of the cross bar, and is restricted in its movement by a guide bracket I" mounted on one of the standards "I; a counter balance I" secured on the cross bar I12 operates to hold the spray chamber I" in a selected position.

Another spray chamber I90 is preferably provided adjacent the chamber I". This chamber is similar to the one just described, and is connected with the tank in substantially the same manner; duplicate elements of construction being similarly designated in both spray chamber mountings. Instead of being mounted on the cross bar I12, however, the second chamber ISO is mounted on a tube I9I rotatable about the cross bar. A handle bar I82 secured on the end of the tube I9I is arranged similar to the handle I81 of the cross bar, and serves to separately swing the spray chamber I90 about the axis of the cross bar I12; 9. counterweight I93 being provided to hold the second chamber in adjusted position. The journal mounting of the spray chambers I" and IIII provides means for making a final adjustment to accurately position the discharge orifices I83 relative to the pipe being sprayed; and the eccentric arrangement of the "chambers insures ample space for fluid flow to the orifices.

Means are also provided for applying a final covering of suitable material, such as a strip of kraft paper Ill. A roll I" of this material is pivotally mounted for adjustment on the carriage I08, and a suitable brake band I suspending a weight I91 serves to tension the strip as it is peeled 0d the roll. The kraft paper roll is ar- Since the spray chamber I" is supported by rangedon the carriage, preferably adjacent the carriage operator's platform I99 for convenience, so that this material will be wrapped as a final covering over the bituminous saturated fibrous W pp 8- The major controls for the machine are preferably located in two centralized positions; viz., on the frame mounted operator's platform I adjacent the headstock 9, and on the operator's platform I39 of the carriage. A switch board I99, conveniently arranged on the frame platform I, is provided with suitable ,control switches; and a second switch board I99, conveniently arranged on the carriage platform I99, is also provided with suitable control switches. In describing-the control circuit for the machine the followins abbreviated terms will be used to'deflne the -pre-' viously described magnetic clutches. The clutch 99 will be-called a transmission: clutch, and the clutch 29 will be termed a rotor clutch. One of the carriage drive clutches I26 will be called a forward clutch, and the other will be termed a reverse clutch. I

Referr ng particularly to the control circuit, shown diagrammatically In Figure 15,. the electric energy is taken from the lines "I and 2,92 communicating with a suitable source of direct current. The forward clutch energizing coil 299 is connected at one end to the line 202, and is connected at the other end to a switch am 209 of a two-pole magnetic contactor generally designated 206. The contact element 201 of switch arm 209 is connected to the line 20I, so that when the contactor is closed the coil 299 is energized and the forward clutch operated to drive the carriage I08 to the left as shown in Figures 1 and 2.

The other switch arm 209 of the contactor 299, is connected to one end of the contactor solenoid 209 having a. plunger 2 operatively connected to the switch arms 299 and 209 of the contactor. The other end of the contactor solenoid is connected to line 202 through the stoplbuttons 2I2 and 2I3, mounted on the carriage platform switch board I99 and frame platform switch board I98 respectively. A start button 2I9, mounted on the carriage switch board I99, is connected between the switch arm 209 and the line MI; and the contact element 2I9 of switch arm 208 is also connected to the line 21.

When the start button 2 is pushed, the circuit through the solenoid 209 is completed and the plunger 2I I is actuated to close the contactor and engage the forward 'clutch. At the same time, the solenoid circuit is completed through the switch arm 208 to hold the contactor closed after the start button is released. Upon pushing either of the stop buttons 2I2 or 2I9, however, the solenoid circuit is broken and the contactor is opened to disengage the forward clutch.

In order to prevent an accident, should the operator fail to stop the carriage, an automatic limit switch 2" is interposed in the solenoid circuit. This switch is shown in mounted position on the machine frame in Figure 2. An arm 2I8 projecting downwardly from the carriage I09 is positioned to engage and open the limit switch 2I'I before the carriage reaches the end of its track.

The reverse clutch energizing coil 2I9 is connected across the lines 20I and 202, and is controlled by a contactor 22I in a manner similar to the forward clutch coil 203. The start button 222 for the contactor 22I is mounted on the carriage switchboard; and a reverse limit switch 229 is connected in a manner similar to the forward limit switch 2". This switch mounting isshowninFlgure 1,andispositionedforengagement' by the carriage arm 229.

.To prevent accident, should the operator push the start buttons for both forward and reverse clutches at the same time, or push one while-tho contactor of the otheris closed, a mechanical interlock is providedbetween the contactors 299 and 22I. This interlock is indicated at 229, and may be of any standard or well known ype; the interlock operating to prevent both contactor: being closed at the same time.

The transmission clutch energizing coil 221 is connected across the lines "I and 292, and controlled by a contactor229 in a manner similar to the'forward clutch coil 299 except that in this case no limit switch is included. The start button 229 for the contactor 229 is mounted on the carriage switch board I99 as were the others.

The rotor clutch energizing coil 29I is also connected across the lines 20I and 292, andis controlled by a contactor 292. In thus case, however, the contactor solenoid switch is omitted so that the contactor is closed only when a start button is pushed. Two start buttons 299 are provided, connected in parallel; one on the carriage switch board I99, and the other on the frame switch board I99. This arrangement per mits either the operator on the frame platform I, or the operator on the carriage platform I99 to rotate the rotors and move the pipes into the wrapping position.

The connections to various motors in the machine are now shown, since these are made in the usual manner. The control switches for the. reversible motor I29 of the carriage speed change, and the fluid pump motor I9I are mounted on the carriage switch board; while the control switch for the mail drive motor" may be located at any convenient or advantageous position.

Operation: Considering that the carriage I99 is positioned at the head end of the machine adiacent the headstock 9, that the main drive motor 21 is running, and that all the clutches are disengaged, a plurality of pipes 9I are mounted in position between the headstock and tailstock. The frame platform operator shifts the transmission gears, by means of the shift levers 99 and 9|; and the carriage platform operator pushes his start button -229 to engage the transmission clutch 99 for completing the drive to the clutch means 91 of the pipe supporting shafts.

An operator, preferably the frame platform operator, then pushes his start button 299 to engage the rotor clutch 29 and rotate the rotors I9; thus causing the pipes to move orbitally about the rotor axis. When one of the pipes 9I has been rotated into position adjacent the carriage I99, the operator releases the start button to disengage the rotor clutch.

The carriage operator then swings the tank I99, by means of the hand wheel I99, until the proper angle is made with the pipe to be Considering that the adhesive fluid is being heated, and that the strips I99 have been threaded through the carriage, the stripsare secured to the pipe end by any suitable means. v Having adjusted the carriage speed change by rotation of motor I29, the carriage operator pushes his start button 2 I9 to engage the forward clutch and start the carriage moving along the pipe; at the same time, the frame platform operator throws in the clutch sleeve 99 of the pipe being wrapped by means of the lever H. The

combined movements, viz., the revolution of the pipe and the linear travel by the carriage, serve to apply the strips I49 in a spiral wrapping.

As the wrappings start on the pipe, the carriage operator starts the pump motor I9I to spray the fluid on the pipe; the spray chambers I14 and I having previously been adjusted to position their discharge orifices I93 adjacent the point where the strips I49 start engagement with the pipe.

Two strips I49 are shown for purposes of illustration; it being obvious that one, or more than two may be used. In the present instance, two layers of the wrapping strip I49 are applied, one spiral over the other. After the wrapping has proceeded a short distance, the final covering of kraft paper I94 is started on the pipe, and the wrapping then proceeded until the pipe is completely covered. If it is desirable to change the pitch of the spiral wrappings, this may be ac-,

complished by either varying the speed of the carriage, or the speed of rotation of the pipe being wrapped, or both; the angle which the strips make with the pipe being varied in accordance by turning the hand wheel I38.

After the pipe is covered, the carriage operator pushes his stop button 2| 2 to disengage the forward and transmission clutches and stop both movement of the carriage and rotation of the pipe. The strips I49 are then out, and tho-operation contirfued until the-'pipe is covered with the kraft paper I94. After cutting the paper strip, the carriage operator pushes the start button 222 to engage the reverse clutch and move the carriage back to the starting position; the gear ratios in the reverse mechanism permitting a quickreturn.

In the meantime, the frame platform operator again pushes his start button 239 to rotate the rotors and move a new pipe into the wrapping position. The above cycle of the wrapping operation is immediately started to wrap the new pipe. While the second pipe is being wrapped, the completed pipe is removed from its position and replacedby a new one; the complete operation as described being repeated so that the wrapping is effected as a substantially continuous operation.

In the machine illustrated and described three pipes are shown demountably positioned between the rotors, but it is to be noted that a less or greater number may be so arranged. In the form shown, since there are three positions of rest in a complete revolution of the rotors, it is convenient to remove the wrapped pipe in one position of rest, and place a new pipe in that mounting in another position of rest. By arranging suitable skid ways adjacent the machine the new and wrapped pipes may be conveniently directed to and away from the machine.

I claim:

1. In a pipe wrapping machine, means for rotatably supporting a plurality of pipes, a carriage for wrapping material, means for moving the supporting means to position each pipe successively adjacent the carriage and at a discharge position, means for revolving the adj acently positioned pipe and moving the carriage in time therewith to effect a spiral wrapping thereof, and means for effecting the recovery movement of the carriage while the supporting means moves the wrapped pipe to the discharge position.

2. In a pipe wrapping machine, a headstock, a rotor journaled in the-headstock, a series of shafts journaled in the rotor for rotatably supporting the ends of a plurality of pipes, a gear on each shaft, a central gear meshed with each of said shaft gears, means for rotating the rotor to move the pipesinto and out of a wrapping position, means for rotating the central gear to revolve the pipes about their own axis, and means for applying a wrapping material to the pipe in said wrapping position.

3. In a pipe wrapping machine, a headstock, a rotor journaled in the headstock, a series of shafts journaled in the rotor for rotatably supporting the ends of a plurality of pipes, a gear journaled on each shaft, a centralgear meshed with each of said shaft gears, means for rotating the rotor to move the pipes into and out of a wrapping position, means for rotating the central gear 'to rotate the shaft gears, clutch means for looking a selected shaft gear to its shaft for revolving a selected pipe about its own axis, and means for applying a wrapping material to the pipe in said wrapping position,

4. In a pipe wrapping machine, a pair of rotors, means journaled on said rotors for supporting a plurality of pipes therebetween, a movable carriage for wrapping material,- driving means for the rotors, electrically controlled means interposed in the driving means for rotating the rotors to successively position the pipes adjacent the path of movement of said carriage, means for revolving the adjacently'positioned pipe, electrically controlled means for moving the carriage to apply the wrapping material on the revolving pipe, and electrically controlled means for reversing the direction of movement of said carriage.

5. In a pipe wrapping machine, a pair of rotors, means journaled on said rotors for supporting a pluralityof pipes therebetween, a movable carriage for wrapping material, driving means for the rotors, electrically controlled means interposed in the driving means for rotating the rotors to successively position the pipes adjacent the path of movement of said carriage, means for revolving the adjacently positioned pipe, means for varying the speed of rotation of said adjacently positioned pipe, electrically controlled means for moving the carriage to apply the wrapping material on the revolving pipe, means for varying the rate of movement of the carriage, and electrically controlled means for reversing the direction of movement of said oarriage.

6. In a pipe wrapping machine, a pair of rotors, means journaled on said rotors for supporting a plurality of pipes therebetween, a movable carriage for wrapping material, means for rotating the rotors to successively position the pipes adjacent the path of movement of said carriage, a magnetic clutch interposed in said rotating means for controlling the rotation of said rotors, means for revolving the adjacently positioned pipe, and means for moving the carriage to apply the wrapping on the revolving pipe.

'7. In a pipe wrapping machine, a pair of rotors, means journaled on said rotors for supporting a plurality of pipes therebetween, a movable carriage for wrapping material, means for rotating the rotors to successively position the pipes adjacent the path of movement of said carriage, a magnetic clutch interposed in said rotating means for controlling the rotation of said rotors, means for revolving the adjacently positioned pipe, a magnetic clutch interposed in said revolving means for controlling the rotation of the adjacently positioned pipe, and means for moving the carriage to apply the wrapping on the revolving pipe.

8. In a pipe wrapping machine, a pair of rotors, means journaled on said rotors for supporting a plurality of pipes therebetween a movable carriage for wrapping material, means for rotating the rotors to successively position the pipes adjacent the path of movement of said carriage,

a magnetic clntch interposed in said rotating

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