US682725A

US682725A - Flanging-machine.

Info

Publication number: US682725A
Application number: US1425600A
Authority: US
Inventors: Luther D Lovekin
Original assignee: Individual
Current assignee: Individual
Priority date: 1900-04-25
Filing date: 1900-04-25
Publication date: 1901-09-17
Anticipated expiration: 1918-09-17

Description

No. 682,725. Patented Sept. l7, mm.- u. LOVEKIN.

FLANGING MACHINE.

(Application filed Apr. 25, 1900.)

7 Sheets-Sheet I.

(No Model.)

INVENTOR:

WITNESSES;

Tu: yonms runs 50.. Pumauma. wunmu'mwm c.

No. 682,725. Patented Sept. I7, I901. L. D. LOVEKIN.

FLANGING MACHINE.

(Application filed Apr. 25, 1900.)

7 Sheets-Sheet 2.

(No Model.)

INVENTORi WITNESSES.

"Patented Sept. I7, I91.

7 Sheets-Shaot 3.

o LDVEKIN. HANGING MACHINE,

. (Application filad. Ayn. 25, 1900.)

(No mum iNVENTOR:

WITNESSES:

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Patented Sept. I7, 1911!. L. D. LUVEKIN.

FLANGING MACHINE.

(Application mm Apr. 25, 1900.

7 Sheets-Sheet 4.

(No Model.)

NN NVNBN -YWITNESSES:

INVENTOR:

TH: NORRIS; PETERS cc. mew-mm, WAsHlNoToN, D c.

No. 682,725. Patented Sept. l7, M".

L. n. LOVEKIN.

FLANGING MACHINE.

(Applica'kion filed. Apr. 25, 1900.) (No Model.) I 7 Sheds-Shoat 6.

FIG .9.

v 1 INVENTOR:

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WITNESSES:

no. 682,725. Patented Sept. I7, l90l.

L. n. LOVEKIN.

FLANGING MACHINE.

'Application filed Apr. 25, 1900.)

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(No Model.)

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UNITED STATES PATENT OFFI E.

LUTHER D. LOVEKIN, OF PHILADELPHIA, PENNSYLVANIA.

FLANGlNG-MACHINE.

SPEGIFICATIQN forming part of Letters Patent No. 682,725, dated September 17, 1901.

' Application filed April 25,1900. Serial No. 14,256. (No model.)

To aZZ whom it may. concern:

Be it known that I, LUTHER D. LovEKIN, a citizen of the United States, residing in the city and county of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Flanging-Machines, of which the following is a specification.

My improvements relate to machines employed for expanding or forming flanges upon the ends of pipes or tubular bodies.

Itis the object of my invention to provide a simple, easily operated and adjusted, and efficient machine, by the employment of which flanging operations upon the ends or lips of tubular bodies may be expeditiously and conveniently performed, and in the operation of subject matter claimed as novel being hereinafter definitely specified.

In the accompanying drawings,

Figure 1 is a view in longitudinal sectional elevation on the dotted line 1 1 of Figure 6, of a machine embodying a good form of my improvements.

Figure 2 is a view in face elevation, partly in section, of the flanging head. 7

Figure 3 is a view in vertical section of the flanging head shown in Figure 2, illustrating said head as supported in juxtaposition to a pipe, and its roller carrying arms as engaged upon said pipe.

Figure 4 is an elevation view of one of the roller carrying arms of the construction shown in Figures 2 and 3, removed from the flanging head. 7

Figure 5 isan elevation view of a modified form of roller carrying arm.

Figure 6 is a view in end elevation of the apparatus shown in Figure 1.

Figure '7 is a transverse section through a cam roller and its bearing, section being supposed on the dotted line 7 7 of Figure 8.

Figure 8 is a longitudinal section of a cam roller and the adjacent portion of the roller carrying arm, exhibiting details of the arrangement of anti-friction rollers which I prefer to employ.

Figure 9 is a view in sectional elevation of a modified form of 'flanging head, the carrier arm mounted thereon being shown partly in section andpartlyin full lines, the cam roller of said arm being illustrated as engaged upon a pipe.

Figure 10 is a view in side elevation looking toward the ,end of the shaft 32,-of the head and roller carrying arm shown in Fig ure 9.

Figure 11 is a view in end elevation of a pipe supporting device and a head shaft supporting device which I prefer to employ in some operations.

Figure 12 is a view in side elevation of the parts shown'in Figure 11, illustrating in connection therewith a fianging head the shaft of which extends through the pipe.

Figure 13 is a detail view of the means for being the shaft upon which the head 3 is,

mounted and to which itis secured by a-key or feather.

4 is a driven gear, keyed upon the shaft 2, and in mesh with a driving gear 5, mounted on the shaft-6.

The shafts 6 and 9 are mounted in parallelism and equipped with a series of intermeshed gears, 7, 8, constituting a change gear of well-known construction, the arrangement being, in brief, that the gears upon the shaft 9 are keyed thereto, while the gears 7 upon the shaft 6 are normallyloose thereon, but one of which last mentioned gears may be made fast with respect to said shaft 6' by the manipulation of a lug-provided longitudi- I nally adjustable locking spindle 10 mounted in the hollow interior of said shaft. 6, the lug of which is adapted to engage a lug seat in any one of the gears 7 on the shaft 6.

The shaft 9 is provided with a driven gear 11, in mesh with a driving gear 12, driven,

through the gear 13 and shaft 14, from any preferred source of power or engine,such as an electric motor diagrammatically illustrated at 15.

The gears 11, '12 and 13, are mounted in a fixed part of the frame Work 1, and the shaft 9 is free for longitudinal movement with respect to said gear 11, without interruption of its operation. The head shaft and head, the shaft 6, and the forward end of shaft 9 are all mounted on and carried by a sliding pedestal16, having movement in the direction of the'length of the head shaft upon and with respect to the main frame 1. Conveniently this sliding movement is effected and controlled from the exterior of the machine by the following devices:

17 is a hanger, depending from the pedestal, fixedly engaged in the lower end of which is a threaded sleeve 18, in which, in turn, is engaged a threaded feed shaft l9,the rear end of which,supported in suitable bracket, is provided with a bevel gear 20, in mesh with a corresponding bevel gear 21 on the inner end of a counter shaft, the outer end of which is equipped with any usual hand wheel 79.

Manifestly as the 'wheel 79 is rotated in one direction or the other, the sliding pedestal, carrying the head and the principal portions of the driving gear, will be caused to move in one direction or the other, without disturbing the operative connection between said driving gear and the actuating motor. The proportions of the parts and the corresponding range of longitudinal movement of the sliding pedestal will be such as the constructor may select.

The flanging head 2, in its preferred form, is very fully illustrated in Figures 2 and 3 of the drawings. As therein shown, said head is provided with three radially arranged arms 22, each embodying a slide way, 23, said slide ways being formed as channels extending longitudinally of said arms and opening from end to end through the front faces of said arms. The lips of said openings preferably slightly overhang the interior portions of the ways,or in other words, the bodies of said slide ways are all undercut or of breadth in excess of the distance between their respective lips.

The head in its preferred form is provided with a series of what I term roller carrying arms, 24, the number employed conveniently corresponding to the number of ways 23 formed in the head, in which ways respectively the respective rear or lower ends of said arms are entered and snugly fitted,-being engaged by the overhanging lips of the openings, which take into the recesses 25 (shown in Figure 4) in the respective sides of said'arms.

In the preferred embodiment of my invention, so far as concerns the construction of the roller carrying arms,being that especially illustrated in Figures 3 and 4,each arm 24 is formed of two members, 26, 27,

hingedly related. In this construction, the basal member 27 is reduced in breadth at its upper end, and the rockingmember 26 is provided with a pair of depending lugs adapted to embrace the reduced end of said basal member, and to be pivotally connected thereto by a hinge pin 28, having suitable nuts or heads on its respective ends, and passing through said lugs and reduced end. The reduced upper end of the basal member is rounded off, as shown particularly in Figure 3, to a curve concentric with respect to the hinge pin, and provided with a series of teeth to constitute a rack 29. The rocking member 26 of the arm embodies a worm chamber in its lower end, through which extends a shaft 30 equipped with a worm 31 engaged with said rack.

Manifestly by rotation of the shaft 30, the correspondent rotation of the worm will occasion the swinging adjustment of the rocking member upon the hinge pin as a pivot in one direction or the other, and, upon cessation of such rotation of said shaft, said worm will, by its engagement with the rack, retain the rocking member in the position of adjustment to which it has been brought.

In certain embodiments of my invention, to-wit, those illustrated in Figures 1 and 5, the roller carrying arms are illustrated as formed each as a rigid member without the intermediate hinged joint more particularly illustrated in Figures 3 and 4;.

32 are a series of screw shafts, one of which is mounted in and extends longitudinally with respect to each of the slide ways, 23, and each of which is conveniently supported for rotation in a block 33 at the outer end of its Way. Each screw shaft is in threaded engagement with the basal portion of the roller carrying arm entered for sliding movement in the Way in which the shaft itself is mounted, with the result that rotation of a screw shaft 32 will, such shaft being held against longitudinal movement, occasion the radial movement toward or from the center of the head of said roller carrying arm.

Within a suitable housing in each block 33, is a gear 34 fast upon the screw-shaft 32 which extends freely through said block. The outer ends of the shafts 32 protrude beyond the blocks 33 and are conveniently provided with polygonal heads to which wrenches or similar instrumentalities may readily be applied.

The head 3 is conveniently built up from a number of matched plates and members assembled and bolted together in any convenient manner.

The periphery of the head embodies a circumferential recess 35, into which the housings for the gears 34: open, and in said recess is mounted, in such position as to engage the teeth of the gears, an annular rack 36, capable of rotative movement independent of the movement of the head, and conveniently equipped with what I term a rack operating wheel or extension 37.

The outer end of each roller carrying arm is preferably reduced to form a roller axle 38, as shown in Figures 7 and 8, upon which is mounted a cam roller 39, preferably,-although not restrictively,-of the form depicted in the drawings, in which it is illustrated as having a side of straight cylindrical form, merging at its lower or rear end into a skirt or flaring portion the tapering face of which is at an acute angle with reand a second series of rollers of considerably.

smaller diameter 44, alternating with said rollers first named, as shown especially i Figure 7.

The construction shown in Figure 9, illustrates an embodiment of my invention in which, instead of a disk-like head provided with a series of ways and a series of roller carrying arms,-is provided a head which represents so to speak but a fractional portion of the head shown in Figures 2 and 3, but which is, so far as it extends, substantially identical in arrangement with the construction illustrated in the figures last named. The flanging head shown in said Figure 9 is illustrated as provided, similarly to the head in Figures 2 and 3,with a way extending radially from the head shaft, a screw shaft mounted in said way, and a roller carrying arm mounted in, for movement longitudinally with respect to, said way, under the actuation of the screw shaft, said roller carrying arm being in the main identical in construction with the arms illustrated in Figures 2 and 3.

In the construction shown in said Figure 9, however, the basal member of the carrying arm is, within the way 23 recessed as to its lower end to receive a sleeve 45 having a threaded bore. Openings 46 lead from the respective sides of the basal member to said recess, through which openings and the threaded bore of the sleeve 45 the screw shaft extends, but engages only with the sleeve. As the result of this arrangement,the strain upon the threads of the screw shaft 32, when the roller carrying arm in an inclined position is at work upon a pipe, is more evenly distributed. In the construction shown in Figure 9 the outer end portion of the screw shaft is provided with an enlargement 47, which engaging in a suitable housing in the framework of the head, secures said shaft against longitudinal movement.

In the operation of my apparatus, as illustrated, the principal work to be accomplished flange upon the pipe and at the same time to force it to a seat in the face of an annulus or coupling ring brought to a convenient position encircling the mouth of the pipe prior to the flanging operation. The purpose of the formation of the flange and the employment of the annulus, is to providemeans by which pipe sections thus equipped may be united or coupled.

My apparatus is adapted, by the employ ment of suitable cam or other rollers, to produce flanges of any desired character required in the. use of various forms of pipe coupling devices. Inthe operation of my apparatus in its preferred embodiment, to form a flange 48 upon a pipe t9, the cam rollers,

as the flanging head rotates, first engage as to their side faces against the bore of the pipe end, forcing or expanding said pipe radially outward and strongly against the bore of the annulus or coupling ring 50. To accomplish Referring to Figures 1 and 3, it will be manifest that upon the rotation of the head shaft, all the parts carried by such shaft and shown inFigure 1, rotate positively with it, except the annular rack 36, which is free for rotative movement of its own with respect to said head. When, then, during the rotation of the head,it is desired to set the arms'slightly outward, the operator may effect this by placing his hand upon the rack operatingv wheel 37, thereby braking, so to speak, its action, or causing it to rotate transiently at a slower rate than the flange head, so that as a result of the engagement of the gears 34 (which continue to travel at the same rate of speed as the head) with said rack, said gears will be caused to rotate upon their axes, and the con sequent rotation of the screwshafts 32 oocasions the correspondent uniform movement outward of the roller carrying arms, without stoppage of the machine.

On the other hand, if it be desired to set the roller carrying arms toward the center of heavily against the pipe 49, readily determine when the rollers have reached the desired set, by observing the increasing difficulty of retarding said wheel 37. Therefore the comparative ease or difficulty of retarding said wheel 37 constitutes an accurate gage of the pressure the rollers are exerting against the pipe.

Apart from the adjustment of the roller carrying arms in a radial direction, as already described, said arms may be adjusted by the application of a wrench to the polygonal outer ends of the screw shafts. In this adjustment, which of course requires the stoppage of the machine, the roller carrying arms may be set at somewhat different radial adjustments, if such arrangement should happen to be required for any purpose.

The inclination of the rocking or tilting members 26 of the roller carrying arms, may be effected through the application of a handle 51, as shown in dotted lines in Figure 3, or a wrench or other instrumentality, to the shafts 30, in succession.

In the continued operation of the machine in the production of the flange 4:8 and its depression within the recess of an annulus 50, the fianging head is, after the cam rollers engage against the bore of the pipe, as explained,gradually fed forward, so that the skirts of the rollers encounter and deflect outwardly the lip of the pipe, and after the lip of the pipe has been turned outwardly as far as can be done with the axes of the rollers in parallelism with the axis of the pipe, the rocking members 26 of the roller carrying arms are tilted to the position shown in Figure 3, in which position the bodies or straight sides of the rollers are carried away from the interior faces of the pipe, but the skirts of the rollers bear directly and fairly against the outer face of the flange and force it directly against the bottom of the recess in the annulus. The three stages of the operation are indicated progressivelyin Figures 4, 5 and 3.

As will be manifest, the alteration of the roller from the position shown in Figure 4 to the position shown in Figure 3 may be effected in one adjustment of the rocking member 26, or may be gradually brought about as a result of several adjustments in succession. This will depend largely upon the dimensions of the pipe, the number of cam rollers contemporaneously engaged upon it, and the kind of flange desired to be produced.

In Figure 5 I show an arrangement in which the axle of the roller carrying arm is provided with a cap piece, on which are erected a pair of lugs 52, in which is journaled the axle of a deadening roller, as I term it, 53, which, after the flange is partly formed or turned outwardly, may be brought to bear directly against said flange, and in the rotation of the head, travel upon said flange and beat it very firmly into its recess. The use of this deadening roller may be resorted to for an action supplementary to that of the skirts of the rollers even after the rollers have been operated in the position shown in Figure 3.

As will be obvious, the employment of a roller carrying arm of the character shown in Figure 5, equipped with a skirted roller, and also with a deadening roller, enables the formation of flanges upon pipes, without resort to a construction of the roller carrier arm in which said arm is formed of two members hingedly united as shown in Figure 3,as the deadening roller, bearing upon the flange partly formed by the action of the skirt of the roller 39 against the edge of the metal pipe, to complete said flange and beat it down within the recess, dispenses with the necessity of setting said roller 39 at various inclinations.

As will be understood, of course, in the employment of the structure for the purpose of expanding tube ends, apart from the formation of flanges, no setting of the rollers at an angle will be ordinarily required.

-Any desired number, sequence, and form, of flanging or cam rollers may be employed upon a roller carrying arm.

In some constructions of my apparatus, the head shaft terminates, as to its front end, as shown in Figure 1, at a point about abreast of the bases of the slide ways 23, such shaft being in such construction supported at its rear end only.

In some instances, however, it is desirable to support said shaft at its front end also, and I have accordingly devised for the purpose the mechanism shown in Figure 11.

In the construction shown in said last mentioned figure, 54 is a pedestal erected upon the main frame of the machine in a position in proximity to the flanging head, embodying a concave recess 55 at its upper edge, in which rests the pipe to be operated upon, and provided with an arciform cap plate 56 which rests upon the top of the pipe and is secured as to its respective extremities by nut provided bolts or other suitable instrumentalities 57, to lugs 58 with which the pedestal 51 is equipped.

Manifestly by tightening up the bolts 57 the cap plate 56 will be drawn tightly down upon the pipe and pedestal and hold the pipe firmly in position.

59 is what I term an adjustable shaft supporting spider, the same embodying a hub 60 and a series of radially extending shanks or arms 61, adjustable as to length, and equipped with feet which bear against the inner face of the pipe.

Each shank or arm 61 is made adjustable as to length in any preferred manner. Conveniently such adjustment is secured by forming each with a thread, and entering its inner end in a correspondingly threaded socket in the hub 60, so that by rotation of a shank it may, within given limits, be set in or out a desired distance.

The feet at the ends of said shanks are conveniently formed of parallel plates 62 and (33,

the plates 62 being rigidly mounted on the extremities of the arn1s61, and the plates 63 being arranged with their outer faces, which correspond approximately to the curvature of the pipe surface,.in contact with the wall of the pipe.

The

plates

62 and 63 may be maintained in working relationship by balls 64 engaged in suitable recesses in the opposing faces of said plates.

As will be understood, this method of joining the

plates

62 and 63 together, allows the rotation of the plates 62 and arms 61 upon their own axes to bring them to any desired set without dismantling the spider or withdrawing it from the pipe. In the rotation of the head shaft the hub 60 forms a firm stationary bearing for its advance end, supportin g said shaft axially with respect to the pipe, and allowing said shaft freedom for both rotative and longitudinal movement.

In the pipe supporting device shown in Figures 1 and 6, 65 are a pair of pipe supporting pedestals the bases of which are entered free for sliding movement toward and from each other transversely with respect to the axis of a pipe operated upon, the lower ends of said pedestals 65 being entered in a transversely extending way 66, (Figure 1.)

The movement of said pedestals toward and from each other is conveniently accomplished through the agency of a right and left hand screw 67 disposed beneath the way 66 and engaged in suitable threaded lugs depending from said pedestals, said screw being conveniently manipulated by means of the hand wheel 68.

The opposing faces of the pedestal are provided with a pair of clamps 69, each removably mounted in any preferred manner upon the pedestal which supports it.

The clamps 69 69 are of approximate crescent shape in profile, the concave faces which present toward or oppose each other, being of uniform diameter and conform generally to the curvature of the pipe to be supported, the preferred arrangement being one in which a machine intended for operation upon pipes of various sizes, will be provided with a series of pairs of clamps 69 of different sizes, that pair which most closely conforms to the curvature of the pipes operated upon at any given time, being placed in the machine for the purpose of such operation.

Each clamp is provided as to its inner face with a vertically extending recess 70, the bottom of which is from the upper end of the clamp to the lower, of such curvature as to conform to the rim of the annulus or coupling ring 50, which latter placed between the two clamps, rests as to its outer side edge within the respective recesses of the opposing clamps and bears and fits against the bottoms of said To secure the annulus or coupling head of each screw being (before the pipe is mounted in position) exposed in position for.

manipulation for the tightening up of the screws, and the advance ends of the screws As will be manifest the coupling rings 50 may be very quickly secured in position by' setting up the pedestals 65 under the rotation of the screw 67, and then tightening up the screws 71.

After the coupling ring is mountedlinposition, the pipe 49 is inserted through said" ring,and, its outer or distant end being supported in any desired manner, its inner end is secured by a pair of

bands

72, 73. The

band 72 passes across the top of the pipe, and. is as to its respective ends provided with the blocks 74, the outer ends of which are s ecured by the bolts 75 to lugs 76 mounted on or secured to the respective clamps 69.v The band 73 passes beneath the pipe and is as to its respective ends provided with blocks 77" secured by bolts 78 directly to the under faces of the respective blocks 74. As will be .understood, when work is done upon a succession of pipes of a given size, the band 72 remains secured by the bolts 75 to the lugs 76, and is not loosened as one pipe after another is removed and replacedby another.

When the clamps 69 are removed the bands 72 and 7 3 are of course taken with the clamps, and the substitute clamps then applied are of course provided with their own bands of like organization and application.

It is', of course, to be understood that the device mounted in the pipe for the support of an end of the head shaft projecting there- .into, and shown in Figure 11, and which devices are preferably used whenever the head shaft is formed of suflicient length to project within the pipe,--may be used conjointly with my special form of devices exterior to the pipe and employed, as shown in Figure 1, to secure the pipe operated upon fixedly in position.

Having thus described my invention, I claim and desire to secure by Letters Patent 1. In a flanging machine, in combination, a flanging head, a motor, a sliding pedestal on which said head is mounted, gearing connective of the motor and head, and two members of which may be adjusted with respect to each other without interrupting the operation of the gearing, a screw shaft engaged with a threaded member carried by said pedestal, and a manually operated device upon the exterior of the machine the rotation of which occasions the rotation of said shaft, substantially as set forth. p

2. In combination, a rotatable head, an arm mounted on said head and adapted to move toward and from the center thereof, a radially disposed screw shaft in threaded engagement with said arm, a rack mounted on said head free for rotation independently of said head, and a connection between said shaft and said rack, substantially as set forth.

In a flanging machine, in combination, a rotatable head, an arm carried by said head and adapted to have radial movement with respect thereto, a radially disposed screw shaft in threaded engagement with said arm, an annular rotatable device in association with said head and free for rotative movement independent thereof, and a connection between said screw shaft and said rotative device whereby rotation of said device occasions the rotation of said screw shaft, substantially as set forth.

4.. In a fianging machine, in combination, a

rotatable head, an arm mounted on said head and adapted to move toward and from the center thereof, a radially disposed screw shaft in threaded engagement with said arm, a rack mounted on said head free for rotation independently of said head, a gearing connective of said shaft and said rack, and an operating wheel connected with said rack, substantially as set forth.

5. In a Hanging machine, in combination, a rotatable head, a series of roller provided arms adapted for radial movement toward and from the center of said head, radially disposed screw shafts in threaded engagement with the respective arms, a rack mounted on said head and free for rotative movement i11- dependent thereof, an enlargement or operating wheel connected to said rack, and gears which operatively connect said screw shafts and said rack, substantially as set forth.

6. In combination, a rotatable head embodying a series of radial ways, arms mounted in said Ways and free for movement longitudinally thereof, screw shafts mounted in said ways in threaded engagement with said arms, gears mounted on said shafts, an annular rack mounted on said head free for movement independent thereof, and an enlargement or operating wheel connected to said rack, substantially as set forth.

7. In combination, a rotatable head, undercut ways formed in said head, arms mounted in said ways, shafts mounted in said ways in threaded engagement with said arms, housings at the ends of said ways opening into an annular rack recess, gear wheels mounted on said shafts and disposed within said housings and opening into said rack recess, and an annular rack mounted in said rack recess, substantially as set forth.

8. In a flanging machine, in combination with a flanging head, a roller carrying arm consisting of two members, the first of said members having a lug provided with teeth arranged in a curved series, the other or second member having a lug overlapping said lug first referred to, a pivot passing through said lugs, and a rotatable Worm carried by and moving with the second member, and in engagement with said curved series of teeth, substantially as set forth.

9. In combination, a rotatable flanging head, a series of radially disposed ways, a series of radially disposed screw shafts mounted in said Ways, gears mounted one on each of said shafts, an annular rack engaged with said gears and having rotative movement independent of the head, a series of roller carrying arms engaged with said shafts and each consisting of two members pivotally united and provided with means for moving one member to and securing it in different positions of inclination with relation to the other member, substantially as set forth.

10. In a flanging. machine, a roller carrying arm, and means for supporting and rotating the same, an axle mounted on the end of said arm, a cam roller mounted on said axle, a second roller bearing mounted on the outer end of said roller axle, and a deadening roller mounted in said roller bearing with its axis of rotation transverse or perpendicular to that of the cam roller, substantially as set forth.

11. In combination, a fianging head, a head shaft, means for supporting and occasioning the rotation of said head and shaft, a pair of pedestals, means for moving said pedestals toward and from each other, a pair of clamps carried by said pedestals and having facing grooves to receive an annulus, and screws which secure an annulus in said grooves, said screws being mounted in said clamps with their axes in parallelism with the head shaft, so as to present against the side face of the annulus, substantially as set forth.

12. In combination with a pair of supporting clamps adapted to an annulus or coupling ring, lugs projecting from said clamps, a pipe securing band having at each end blocks adapted to be secured respectively to the respective lugs, and a second band having at each end blocks adapted to be secured respectively to the respective blocks of the band first mentioned, substantially as set forth.

13. In combination with a pair of supporting clamps adapted to an annulus or coupling ring, lugs projecting from said clamps, two pipe securing bands each having a block at each end, one adapted to pass beneath the pipe and the other over it, and means for quickly connecting said blocks detachably to the lugs of the clamps.

In testimony that I claim the foregoing as my invention I have hereunto signed my name this 9th day of April, A. D. 1900.

LUTHER D. LOVEKIN.

In presence of F. NORMAN DIXON, Tnos. K. LANCASTER.