US 1658300 A
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J. W. PLEASANT c011. SPREADER Filed March 0, 1926 3 ts-Sheet 1" Feb. 7, 192s.'
Feb. 7, 1928. 1,658,300
- J. W. PLEASANT COIL SPREADER Filed March 10. 1926 5 3'She ets-Sheet2 (fizz/fir! flizzarr 'a/advz ZKF/mrmh g JM/VW/W Feb. 7, 1928. 1,658,300
J. W. PLEASANT con. sramnnn Filed March 10. 1926 S Sheets-Sheet. 3
Mar /1gp Patented Feb. 7, 1928;
JOHN W. PLEASANT, 0F VALLEY JUNCTION, IOWA.
Application filed March 10, 1926. Serial No. 93,610.
My invention has to do with coil spreaders by which the coils for the rotors or stators of motor generators are spread. and given proper shape for being assembled on the rotors or stators.
My present invention relates particularly to certain improvementson'the device shown in my prior patent No. 1,566,227, issued December 15, 1925.
It is my purpose generally to provide a machine for spreading and shaping coils.
More particularly, it is my purpose to provide a machine of this type having three sets of jaws to engage respectively the sides and the ends of the coil and having mechanism for properly actuating the jaws for moving them to position toshape the coils.
It ismy purpose to provide in such a machine an improved construction for mounting the lower pair of jaws for permitting proper automatic adjustment thereof for making allowance in the finished (1011 for the spacewhich existed between its sides before the spreading operation was performed.
'llhisfeature of my machine, I have called a compensating device. I
Another object of the present invention is to provide animproved mounting for the intermediate pair of jaws, which hold and shape the ends of the coils.
Still another ob 'ect is to provide a-novel mechanism for swinging the jaws and effects ing the spreading operation.
With these and other objects in View, my invention consists in the construction ar rangement and combination of the various parts of my device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which: i
' Figure 1 shows a front elevation of my improved coil spreading machine. 1
Figure. 2 shows a side elevation of the same.
Figure 3 is a detail, sectional view taken on the line 33 of Figure 1.
Figure 4' is a detail, sectional view taken onthe line 4- of Figure 1.
Figureb is aperspective view of one of.
the intermediate jaws.
Fi re B'is'aperspective view of one of the comp eted coils. r
Figure 7 is a perspective view of one of the coils, showing its sha e before the commencement of the sprea ing operation.
members 12 and 13.
Figure 8 is a diagrammatic view of a portion of a core illustrating the arrangement of the coils assembled thereon. c
Figure 9 is a detail, sectional View take on the line 9 9 of Figure 1.
Figure 10 a detail, sectiona-lview taken on the line 1010 of Figure 9.
Figure 11 is a diagrammatic, sectional view illustrating the necessity for compensating m the completed coil for the space between the sides in the unformedcoil; and
Figure 12 is a detail, sectional view taken on the line 12-12 of Figurel.
My coil spreading machine has a frame provided with two laterally spaced, rear frame members 10, which are inclinedfrom their lowerends upwardly and forwardly. The laterally spaced front frame members 11 are shorter and extend from their lower ends upwardlyand rearwardlyas shown in the same figure. i
The members 10 and 11 at the sides of the machine are connected with each other-and are braced by means of horizontal side frame fore-and-aft spaced, upright bars-15*, which extend from the front portions of theside members 12 upwardly and are connected at their'upper ends with the upper endsofthe respective frame members 10.
At the top of the machine is a cross frame member 16 for comie'c'ting the sides of the frame and thus connecting the members 10 and 15 at each side with the members 10 and 15 at the other side.
Prelim ma a statement aboutcoz'l spreading.
- It may perhaps contribute to the clearness of the description of my mechanism and of its mode of operation to say at this time that machines of this kind are intended to spreadand shape coils A, such asare shown in Figure, 7 to cause them to assume the shapeillustrated by the finished coil B of Figure 6. These coils are intended to be arranged as shown in the diagrammatic, fragmental view of Figure 8, on a core of a rotor for instance.
In the illustration in Figure 8, I have used for example the arrangement of the coils for a six-pole machine. In such a machine, the side edges 17 are spread so as to be spread 60 around the rotor. Of course the actual length of the arc of a circle from center to center of the side members 17 differs in rotors of diiferent diameters.
It is also to be noted that the members 17 must be twisted until they lie in planes passing radially through the center of the rotor. That is to say, the coils must be so spread, that the sides 17 will be in such positions with relation to each other that these sides will fit into slots in the core arranged 60 apart and cut radially of the core.
The end 18 of the coil are given the wellknown usual shape for permitting the coils to clear and overlie each other in the usual manner of assembling them.
A proper coilspreading machine therefore must have means for engaging the sides 17 of the coil and spreading them apart and giving them the proper twist and must have means for engaging and holding the ends 18 and for giving them the proper twists.
For accomplishing this purpose, I have provided in my machine what I shall for convenience call a lower pair of jaws for engaging one side of the coil and an upper pair of jaws for engaging the other side of the coil, and a third pair of jaws for engaging the ends of the coil. Thesejaws must have such relative movement that the sides of'the coil are spread through the arc of a circle for moving them a part 60 and for twisting them until they will fitin the proper radial slots.
The third pair of jaws must give the proper shaping to the ends of the coil.
It is obvious that the jaws must be adjustable laterally for spreading coils of different lengths and that the machine must be adjustable for swinging the jaws and spreading them for spreading them or otherwise, so that coils may be made for larger or smaller rotors for varying length and radii and of varying numbers of poles.
I will now proceed to describe the lower jaws and the manner ofmounting them.
On the cross members 12 at the ends of the machine are mounted brackets 19. (Figure 2.) Pivoted as at 20 on the brackets 19 at the end of the machine are brackets 21, which are permitted some slight tilting movement in the manner hereinafter described.
The lower parts of the brackets 21 are connected by a downwardly opening channel bar 22, shown in Figure 3, extending across the machine from side to side. (Figure 3). The brackets 21 are also connected by foreand-aft spaced bars 23 located just above and slightly spaced from the channel 22, as
shown in Figures 1 and 3.
Rotatably and non-slidably mounted in the brackets 21 are the ends of a shaft or rod 24:, which for the greater part of its length intermediate of its ends, is screwthreaded as shown in Figure 1. The rod 24 is provided with right-hand screw-threads 25 from its middle toward its right-hand end, and with left-hand screw threads 26 from its middle to its left end.
The upper parts of the brackets 21 are connected by a transverse shaft 27.
. The lower jaws are slidably mounted on the bars 23 and slide on the channel 22.
In this connection, it may be mentioned incidentally that the lower jaws are thus slidable laterally in the machine, and because of the fact that the brackets 21 and channel 22 are tiltable, the lower jaws have slight tilting movement for compensating for the space between the opposite' sides of the coil A.
Reference to the desirability of this tilting adjustability will be hereinafter made.
It may be noted that the tilting movement of the lower jaws is limited by means of two stops 28 and 29 arranged on the framemembers 12 at each end of the machine to engage the under side of the channel 22. (Figure 9.)
Referring now to the mounting of the lower jaws, it, is to be noted that each lower jaw is supported on a body bracket 30 having a rearwardly extending arm 31* connected with another bracket 32 slidably mounted on the bars 23 and adapted to slide on the channel 22. (See Figure The brackets 32 have openings 33 provided with screw-threads to coast with the right and left-hand screw-threads of the shaft 24:. Each jaw bracket 30 has at its forward end an upwardly projecting jaw member 3 1. (Figure 9.)
Resting on each jaw bracket30 is a coacting movable jaw member 35.
These lower jaws are substantially like those of my prior patent.
The movable jaw member 35 is slidably mounted on a pair of parallel rods 36 extending from the jaw member 34: rearwardly in the machine to the upright flange or the like 37 on the jaw bracket 30. a (See Figures 3, 9 and 10.),
Coil springs 38 are connected withthe jaw members 35 and with theflange 37 and are so tensioned as to yieldingly tend to hold the .j aw members 35 open.
The rods 36' serve as guides for the jaw members 35 and hold them against tilting.
Secured to each aw member 35 1s a rear (see Figures 3 and which is screwed 1 into a socket 40. The socket40 has a shank gripping the side 17 of a j 41 slidably extended through the-flange 37 as shown in Figure 3, and projecting rearwardly therefrom.
-The jaw bracket has at its rear a pair of ears 42 between which a cam 43 is eccentricallypivoted as at 44. The cam 43 is; provided with an operating handle 45, which when actuated for rotating the cam to the proper position causes the dwell of the cam to engage the. shank 41 for moving the jaw member toward the jaw member 34for coil" between 1 said jaw members.
It will be seen that by rotating the shaft 24, the lower jaws may be moved simultaneously either toward or from each other on account of the arrangement of] the threads on such shaft and in the brackets 32.
For rotating the shaft 24, I provide the handle46 thereon, as illustrated in Figure 2.
On account of the fact that the center of gravity of the lower jaws. is forward with relation to the pivots 20, it will be seen that the lower jaws and the brackets 32and the brackets 21 will naturally tend to tilt forwardly and downwardly to the lower limit of their tilting movement, as determined by the stops 28 shown" inFigure 3. In order to control this tilting movement, if it is desired to limit it to a position other than that determined by the stops 28,'I provide the following means:
On the right-hand bracket 21 is a forwardly and downwardly extending arm 47, to which is pivoted a lever 48. The lever 48 is pivoted on the right-hand frame member 11, as at 49. On the member 11 is a forwardly and upwardly extending bracket 50 provided in its upper port-ion with a series of vertically spaced holes 51 to selectively receive a stop pin. 52. By inserting the stop pin 52 in the desired hole 51, the movement of the lever 48 upwardly can be limited in such manner as tolimit the downward, forward, tilting of the brackets 21 and the parts connected therewith. 1
It will thus be seen that the parts can be prevented from tilting as far downwardly as to engage the stops 28, if prevention is thus desirable. g
In the use of the lower jaws, the handle is used to rotate the shaft 24 for adjusting the lower jaws laterally in the machine to their desired positions for the particular coils to be spread.
The handles 45 are .mampulated for ro-" tating the cams 43 until the cams permit the springs 38 to hold the jaw members 35 in open position.
One side of the coil is then placed on the jaw brackets 30 adjacent to the jaw members 34 and the handles 45 are swungto positions for forcing the jaw members 35 to their positions for engaging the side 17 of the coil A.
The coil A in the form shown in Figure 7 is generally slid endwise for insert-ion into the ja'ws. i
Upper y'awa I will now describe the upperjaws, which receive the upper side of the coil.
Slidably mounted on the bars 15 at each endof the machine is a bracket .53. The brackets 53 project forwardlyfrom the bars 15, as shown for example in Figures 2 and 3. J ournaled in the forward portions of the brackets 53 is a transverse shaft 54, which supportstheupper jaws and also the third set of jaws in the manner hereinafter described. i
Mounted on the shaft 54 are clamps, each comprising clamp'members 55 slidably but non-rotatably mounted on the shaft. (Figures 1 and 3). Each pair of clamp members 55 is connected together by means of screw belts or the like 56. Slidably mount ed in each clamp formed by a pair of memmay be firmly clamped in position between the members 55. Each clamp may be locked on the shaft 54 against lateral sliding movement thereon by means of a set screw 58. (Figurel).
It thus appears that bv loosening either set screw 58, its clamp'may be slid longitudinally on the shaft 54. B" loosening the screw bolts 56, the shafts 5( in either clamp may be movedlongitudinally with relation to the clamp. Each pair of shafts'57 carries an upper jaw, which can be swung on the arc of a circle having its center in the center of the shaft 54, and which can be adjusted with relation to its distance from the shaft 54 for forming or spreading coils for rotors of different radii.
Each upper aw comprises a jaw bracket 59 supported between the lower ends of a pair of rods or shafts 57.v (Figure Eachj aw bracket 59 hasa downwardly prolit) 61 similar in construction-to the jaw member 35 and similarly mounted and actuated. The parts are so arranged that the upper aws normallyhang by gravity in positions just above the level of the lower jaws, as illustrated for example in Figure 9. I
' Itwill be seen from the foregoing that the upper 'fjaws are adjustable laterally in my machine. This adjustment is accomplished by loosening the .set screws 58 and shoving the clamps longitudinally on the shaft 54. The clamps may then be locked in proper adjusted position.
The pairs of rods 57 may be longitudinally adjusted in the clamps by loosening the screws 56, sliding the rods 57 longitudinally, and then locking the screws 56.
For raising and lowering the shaft 54, I provide the following means Mounted at the top of the machine in suitable bearings 62 is a transverse shaft 63, having on its ends the beveled gears 64 and having at one end a suitable crank handle 65. (See Figure 1.)
On the frame of the machine at the sides thereof and adjacent to the top thereof are journal brackets 66. On the frame of the machine at the sides thereof between the members of the respective pairs of bars 15, but spaced outwardly therefrom are bearing brackets 67 arranged in alignment with the respective bearings 66.
hafts 68 are journaled in the bearings 66 and 67 at the sides of the machine. On the upper ends of the shafts 68 above the bearings 66 are beveled gears 69 arranged in mesh with the gears 64.
The brackets 53, hereinbefore referred to, are provided with projecting lugs 70, which have screw-threaded openings to receive the rods or shafts 68 which between their ends are screw-threaded, so that when the rods 68 are rotated, the brackets 53 will be raised or lowered, carrying with them the shaft 54, which supports the upper jaws.
The rotation of the shafts 68 is accomplished by manipulating the handle and thus rotating the shaft 63, as shown in Figure" 1.
The shaft 54 is raised or lowered for adjustment to proper position for spreading coils of the desired radii and then the pairs of shafts 57 are raised or lowered to permit the upper jaws to hang just above the lower jaws.
The means whereby the proper height of the shaft 54 is readily and easily determined will be later described.
It will be seen that when the upper and lower aws are in the position shown for instance in Figure 9, and a coil is shoved into position where one side is received between the lower jaw members and the other side is received between the upper jaw members, then if the upper jaws are swung outwardly on theshaft 54, the sides of the coil will be spread apart. Such spreading, however, would not give the desired shape to the ends of the coil illustrated in Figure 6 for en abling the coil to be fitted into the radial slots 71 of the rotor 72, as shown in Figure 8.
' It is therefore necessary that a third pair of jaws should be provided for shaping the I Third pair of jaws.
The third pair of jaws is hung on the shaft 54. The members of the third pair of jaws are adjustable laterally in the machine on the shaft 54 and are also adjustable toward and from the shaft 54. Mounted on the shaft 54 outside the shafts 57 are brackets 73, which are arranged to rotate and to slide freely on the shaft 54. Each bracket 73 is provided with two laterally spaced, upright sleeves or the like 74, the lower ends of which are split asat 75, and are provided with offset ears 76 (see Figures 1, 2 and to receive screw bolts 77.
Each of the sleeves 74 has a normally upright shaft 78 mounted therein.
It will thus be noted that the shafts or rods 57 are arranged in pairs, the members of which are spaced fore-and-aft in the machine, while the shafts or rods 78 are arranged in pairs, the members of which are spaced laterally in the machine.
The brackets 73 slide freely on the shaft 54 and thus allow lateral adjustment of the jaws, which are supported on the lower ends of the shafts 78, in the manner to be described.
These brackets also swing freely on the shaft for permitting theswinging of the third jaws. 7
By loosening the screw'bolts 77, the shafts 78 can be adjusted longitudinally for varying the distances of the third jaws from the shaft 54. The lower ends of each pair of shafts 78 are connected by a sleeve 79, as shown for instance in Figures 1 and 12. The sleeves 79 each carry a shaft 80 arranged parallel with the shaft 54 and mounted slidably but non-rotatably in the sleeve.
On the outer end of each shaft 80 is a collar 81 held in place by a set screw 82.
80 carries an inner jaw supporting bracket- 83 non-rotatably mounted on the shaft and locked against sliding movement thereon by means of a set screw 84. The bracket 83 has at its upper portion a removable member or portion 83. The portions 83 and 83 receive between them a sleeve 85. The member 83 of the bracket 83 is locked in place by means of a screw bolt 86.
In one end of the sleeve 85 is a radially arranged slot 87 shown in Figure 4. R0- tatably mounted in the sleeve 85 is a spindle 88 of a lower jaw member. In the end of the spindle 88 is a hole 89 which receives a pin 90, which at its end projects into the slot 87. as shown in Figure 4. The slot87 is of such width as to permit some play of the pin 90 and thus to permit limited rocking movement of the spindle 88. The purpose of this construction will be hereinafter referred to.
-. 9 .90 with the bracket member 83" for norcomprising a jaw member .92having' at its upper, inner corner a notch 93. (Figure 5.) Pins 94; project rearwardly in the machine from the jaw member 92, and supported on the pins 94 is a coacting jaw mem of the rod 107 is pivoted.
the upward movement of the lever 110.
7 It will of course,
i Mmsqo The pin 90 has a right-angled. extension A spring "91 connects the extension mally holding the spindle? 88 at one limit of its rocking movement.
Each spindle '88 supports a jaw device,
er 95, havinga notch 96 in'its. lower, innercorner. The jaw member 95 is adjustable toward and fromthe jaw member 92 on the pins 94 and may be locked in any adjusted position by means of set screws 97.
-Tl1e jaw members 92 and 95 have regis- Iteringi holes 9 8.and 99 to receive a removable pin 100 p j I will now describethefupper jaw actuating means. j i j 7 Upper jawa'ctaa'tzjngmeam,
Links 101 are pivoted tothe upper "aw brackets 59 by removable pins 102.; I
ure 2.) Slidably. andnon-rotatably mounted on theshaft27. are arms 10;}, to which said links 101 are pivoted. Each bracket 21 ,has a pair of. arms 104 slidably mounted on. .the shaft 27. The arms 103 are. received between the members of the pairs of arms 104, so that when the brackets 21 are slidlongitudinally,the. arms 104 carry thearms 103 with them.
' For rocking the shaft 27 and the arms 103 and the upper jaws, .an arm 105 is fixedto the shaft.27. A.rod 106 is ivoted tothe arm 105 and is connected wit a rod 107. by. a
turnbuckle 108. Pivoted as at 109 on the frame is a lever 110 to' which the lower end At the front of the machine, lever 110 has foot pedal or thelike 111 thereon. A. spring 112 connected with the lever K110. and the frame tends to normally hold the lever .110 at the upperliinitof its. movement. s
-, When the parts are in this position, the
upper jaws hang just over the lower aws, as shownin Figure 9. A stop ll3 hmits 'Dne of the bars, 15is-calibrated andhas' indicating numerals 114thereon, Thenu merals are preferably arrangedconsecutivedescribed.
pair of jaws.
up era'nd lower jaws.
ferent lengths, and must be spread for different sizes and makes of rotors. j
If it be assumed that, the core on which coils are to be used is of a certain length and therefore that the sides 17 of the coil must be of a certain length, it will be understood that a coil A, as shown in Figure 7, of proper size is employed.
The handle 16 is manipulated for rotating the. shaft 24 for bringing the lower jaws a distance apart, so that the overall distance. from outside to outside of the lower jaws is thenumber of inches to be given to the sides 17 of the finished coil.
The pins l02 are removed before the lower jaws are adjusted so as to permit the arms 103 and links 101 to be adjusted without difiiculty,and after the adjustment of the lower jaws, the upper jaws are adjusted to .osit on where they hang above: the lower aws and the pins 102 are replaced.
The shaft 54 is adjusted vertically according tothe diameter. of the rotor for which the .coils are to be spread. This is gauged by means of the calibration on the bar 15 a ready referred tor In order to properly limit the swing of the u per jaws for sixty degrees or otherwise, provide a gauge, which will now be On one end of the shaft 54 is mounted a I pointer finger 115, shown in Figure 2. On I the bracket 53 is a plate 116 having graduations 117 thereon, indicating the number of degrees through which theend of thepointer 115 and the second pair of jaws move durmovement of such second 1s structure is llkethat deing the swin in s s scribed in my prior patent.
The plate 116 is provided with a series of holes 118 to selectively receiveastop pin 119, which is placed in the proper hole for limiting the. swinging movement of the second pair of jaws to the number of degrees desired. For instance, if the secondpairl of jaws are to be swung through sixty degrees, the. pin 119 is setin the proper hole,
further swinging movement of the lower jawswill be stopped... V j J Continuing then the explanation of the operation of'the machine, itwill be seen that when the upper andlower jaws have been adjusted; laterally in, the machine, and the shaft 54 has beenadjusted vertically, then the in 119 is set in the proper hole. The
and when the finger engages the pin119, V
han es 45(see Figure 9) are swung to position for permitting the upper and lower jaws to open and the coil A is shoved endwise into the jaws. Any suitable gauge device may be used for. insuringthat the coils are properly arranged lengthwise in the he third pair of j 'i origina'lly spaced laterally fromv the respec-' 'ws, which have been i d the holes 99 and between the sides of 'tive lower jaws are then shoved inwardly.
The pins 100 are removed and the third jaws are adjusted until the ends of the coil are received between the jaw members 92 and 95, and the pins 100 are then inserted in the unspread coil.
It will, of course, be understood that the third pair of jaws will be adjusted vertically by loosening the screws 77, adjusting the shafts 78, and then tightening the screws 7 7.
The operator then actuates the foot pedal and the lever 110 for actuating the rods 107 and 106 and rocking the shaft 27. This actuates the arms 103 and the links 101 for swinging the upper aws forwardly and outwardly through the required number of de grees for spreading the coil. V
The third pair of aws are'allowed' limited rocking movement, due tothe fact that the spindles 88 can rotate slightly in the sleeves 35. The third pair of jaws are nor mally held in proper position for receiving the coil by the spring 91, but during the swinging movement of the second pair of jaws, the third pair of jaws can rock slightly. This is of some importance, as will now be explained.
he sides 0' the coil bent in the notches 96 and 93 to give the peculiar formation indicated at C, and onaccount of the fact that somewhat.
It will be noted that the distance between the sides of the coil A (Figure7) will vary somewhat in different coils. Thusyif the p' ad coil B, as shown in Figure 11,'were P c in he slots 71 of therotor 72, one
side of the coil would fit into the'bottom of the slot, but the other side of the coil would be spaced from the one side. t is desirable that during the spreading operationindicated by the arrow 201, the outer side of the coil B, shown in Figure 11, should be moved radially inwardly asv indicated by arrow 200 until it will in the completed coil, stand in its slot in the position indicated by the dotted lines 120. V For accomplishing this purpose, the lower jaws are mounted to tilt. The pin 52 (Figure 2) is adjusted. in the proper hole 51 at the beginning of the operation of the Tea chine in such manner that when the upper side'17 of the coil arranged with its lower faceflush with thelower parts of the-jaw members 61 and 60 (see Figure 9), the upper face of the lower side 17 of the coil will be flush with the upper parts of the jaw members 3 1 and 35.
Referring now to Figures 2 and 3, it will be seen that at thebeginning of the operation, gravity will hold the lower jaws at the lower limits of their movement, but during the spreading operation, the lower jaws will be pulled up, as far as they can go, this limit being determined by the stops 29. then this is done, each side of the finished coil will'rest properly in its slot 71.
It will be seen that I have provided a device, which has an unusual capacity for spreading coils of different sizes. All of the jaws are laterally adjustable. The second and third pair of jaws are vertically adjustablefor enabling the machine to handle coils of different kinds.
I have provided in the present machine certain improvements over my earlier machine above referred to, particularly in the tilting movement of the lower jaws and the structure of the third pair of jaws.
The advantage of the tilting movement of the lower jaws will be obvious from the foregoing explanation as will also the advantage of the rocking movement of the third pair of jaws.
' I believe also that I have provideda novel structure in my means for actuating the second pair of jaws for swinging them for spreading the coils. v 7 It will be noted that the brackets 83 may be reversed on the shafts 80 and arranged to hang downwardly therefrom for spreading the larger coils.
It will be noted that the shaft,80 has a key 80 and that the bracket 83 has on opposite sides of the shaft 80, the slots 80. The set screw-8 i can be removed, and the bracket 83 7 can be taken off the shaft 80 and mounted on theoppositeend thereof, if desired; This is important because it makes possible the spreading'of a wider coil with a minimum width ofthe machine.
It'will also be noted that by loosening the screw bolts 86, the sleeves 85 may be adjusted rotatably in their mountings for controlling to a certain degree the limit of the rocking movement of the spindles 88.
Changes may be made in the details of the structure and arrangement of the parts of my machine and it is my purpose to cover by myclaims, any modified forms of structure or use of mechanical equivalents, which may a be reasonably included within their scope.
I claim as my invention:
1. In a coil spreader, a pair of lower jaws for engaging the side of a coil, a second pair of jaws for engaging the other side of "a coil-, havingpivots andbeing mounted mounted to swin of the unspread coil.
2. In a coil spreader, a pair of lower jaws for engaging the side of a coil, a second pair of jaws for engaging the other side of a coil, having pivots and being mounted thereon to swing from posit-ion overhanging the lower jaws, to position spaced a certain number of degrees therefrom, a third pair of jaws for engaging the ends of a coil, pivot-ally freely on pivots in line with the pivotso the second jaws, said first pair of jaws being mounted for limited tilting movement to compensate for the space between the sides of the unspread coil, and means for variably controlling the limits of such tilting movement.
3. In a coil spreader, a frame, a aair of jaws thereon for receiving one side 0 a coil, a second pair of jaws for receiving the other side of a coil and movable for spreading the sides of the coil, and means for mounting the first pair of jaws for limited tilting movement to com ensate for the space'between the sides of the unspread coil, comprising pivoted brackets, stops for limiting the tilting movement of the brackets, and means for slidably supporting said first jaws between the bracket-s.
4:. In a coil spreader, a frame, a pair of jaws thereon for receiving one side of a coil, a second pair of jaws for receiving the other side of a coil and movable for spreading the sides of the coil, and means for mounting the first pair of jaws for limited tilting movement to compensate for the space between thesides of the unspread coil, comprisingpivoted brackets, stops for limiting the tilting movement of the brackets, means for slidably supporting said first jaws between the brackets, and mechanism for simultaneously sliding the first jaws in opposite directions on said means.
5. In a coil spreading machine, a pair of jaws, a second pair of jaws having pivots and being mounted thereon to swing through the arc of a circlefor spreading a coil, a
third pair of jaws having pivots and being mounted to swing freely on its pivots in line with the pivots of the second pair of jaws, said third pair of jaws having limited rocking movement. 7
6. In a coil spreading machine, a jaw structure having a shaft, a bracket fixed thereon,
a sleeve fixed in. said bracket, a spindle mounted in said sleeve for limitedrocking movement, and a jaw supported by spindle.
7. In a coil spreading machine, a jaw structure having a shaft, a bracket fixed thereon, a sleeve fixed in said bracket, a spindle mounted in said sleeve for limited rocking movement, a jaw. supported by said spindle, and means for yieldingly holding said spindle at one limit of its rocking movement.
8. In a coil spreading machine, a jaw structure having a shaft, a bracket fixed thereon, a sleeve fixed in said bracket, a spindle mounted in'said sleeve for limited rocking movement, a jaw supported by said spindle, and means fOr yieldingly holding said spindle at one limit of its rocking movement, said bracket being mounted on said shaft for different fixed adjustments thereon.
, 9. In a coil spreading machine, a frame, a pair of jaws supported thereon for lateral adjustment, a shaft mounted on said frame 1 for vertical adjustment, a pair of jaws hung on said shaft for lateral adjustment and for adjustment toward and from said shaft, a third pair of jaws, means for supporting said third pair of jaws from said shaft, said.
means comprising in each instance a bracket slidable on said shaft,- a pair of laterally spaced shafts supported by said bracket and longitudinally adjustable thereon, a sleeve carried by said pair of shafts, a shaft slidable but non rotatable in said sleeve, a bracket carried by the last shaft, a spindle mounted in said bracket for limited rocking gilovement, and a body carried by said spin- 10. In a coil spreader, a frame, a pair of jaws thereon for receiving one side of a coil, a second pair of jaws for receiving the other side of a coil and movable for spreading the sides of the coil, and means for mounting the first pair of jaws for limited tilting movement to compensate for the space'between the sides of the unsp-re-ad coil, comprising pivoted brackets, stops for limiting the tilting movement of the brackets, and means for slidably supporting said first jaws between the brackets, a shaft other side of a coil and movable for spreading the sides of the coil, and means for mounting the first pair of jaws, for limited tilting movement to compensate for the space between the sides of the unspread coil, comprising pivoted brackets,stops for 1imiting the tilting movement of the brackets, and means for slidably supporting said first jaws between the brackets, a shaft mounted onmbeing mountedto swing thereon, means for said tiltable brackets, arms mounted on said shaft for sliding movement thereon and adapted to be slidably actuated from said means, means for connecting said arms with the second pair of jaws, and means for actuating said shafts.
12.111 a coil spreader, a frame, a lower pair ofjaws, an upper pair of jaws having pivots and being mounted to swing thereon, a third pair of jaws for engaging the ends of the coil during the swinging of the second pair of jaws, said first pair of jaws being mounted for slight up and down movement, and means for simultaneously swinging the second pair of jaws and raising the first pair of jaws toward the pivot line of the upper pair.
13. In a coil spreader, a frame, a pair of 20 aws, a second pair of jaws having pivots and swinging said second pair of jaws from position adjacent to the first pair through the arcs of circles for spreading a coil, means for mounting the first pair of jaws for limited pivotal movement toward the pivot line of the second pair.
14:. In a coil spreader, a frame, a pair of jaws, means for mounting said jaws on the frame for limited tilting movement, a second pair of jaws, pivots for supporting the seo- 0nd pair, means 'for swinging said second pair of jaws from position adjacent to the first pair through the arcs ofcircles for spreading a coil and for simultaneously moving the first pair ofjaws for causing their tilting movement toward the pivot line of the second pair of jaws.
JOHN w. PLEASANT.