US521895A - Watkinqton - Google Patents

Description

(No M0161.) Y 3 sheets-sheet' 1.

- J.- W; ROBERTS.

GAN SE'AMING MACHINE.

No. 521,895. y Patented June 26, 1894.

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(No Modell) 3 Sheets-Sheet 2.

J. W. ROBERTS. GAN SEAMING MAGHINE.

No. 521,895. Patented June 26, 1894.

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(No Model.) 3 Sheets-Sheet 3.

J. W. ROBERTS.

l GAN SEAMING MACHINE. No. 521,895. Patented June 26, 18,94.

Z/zfnesses, l 43, 43 Inventor,

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JOHN tV. ROBERTS, OF CLEVELAND, OHIO, ASSIGNOR TO THE ROBERTS TIN WARE COMPANY, OF SAME PLACE.

CAN-SEAMING- MACHINE.

SPECIFICATION forming part of Letters Patent No. 521,895, dated June 26, 1894.

Application tiled December 1, 1893. Serial No. 492,424. (No model.)

' To all whom, it may concern.:

stationary while having the heads seamedv thereon in order that heads filled packages. Y f

The object of my invention is to simplify the construction of such can seaming machines with a view of increasing their facility of operation, cheapen their construction, and

may be put upon to give them the greatest possible wearing life.

My invention consists in the particular construction, arrangement, and combinationof theparts herein illustrated and described. Reference is here made to the claims for a specific definition of my present invention.

In the drawings which form a part of this specification,l Figure 1 is a side elevation of my machine. Fig. 2 is afront elevation of the same. Fig. 3 is a plan .on the sectional line .fr as of Fig. 1. Fig. 4 illustrates a section on the line y y of Fig. 1. Fig. 4f* is a section on the line a a of Fig. 4. Fig. 5 illustrates an enlarged detail of the cam and pinion which elevates the chucks or can carrier disks of the intermittent rotary carrier frame. Fig. 6 illustrates an enlarged plan detail of theV can carrier chuck-lock, and Fig. 7 illustrates an enlarged front elevation of the same. Fig. 8 illustrates a'section through a chuck and can carrier disk of the can carrier frame enlarged;

"V" and Fig. 8 is anenlarged central sectionAV a'. Fig. 13 is an enlargedplan of one of the seaming rollers, and Fig. 14 is a central crosssection of the same. Fig. 15 is an enlarged rig.'

plan of one of the seaming rollers, and Fig. 16 is a central cross-section of the same. Fig. 1 is an enlarged View illustrating the form of the parts of the can prepared to be operated upon by my improved machine. Fig. 1b is an enlarged view illustrating the first step in the operation of the machine. Fig. 9 is an enlarged view illustrating the second step in the operation of the machine'. Fig. 10 is an enlarged View illustrating lthe third step in the operation of the machine. Fig. lla is an enlarged view illustrating the fourth and complete operation of the machine upon a can.

The parts of cans, that is, the bodies and ends of cans, are prepared by any suitable means to be operated upon by my machine. A broken section of a part of a can is illustrated by Fig. lwhich shows the form of the body and of the ends of causas prepared ready to be operated upon by my improved seaming machine. The cylindrical body, 43, has formed thereon upon each of its ends an outwardly projecting flange, 43'; and the ends, 42, have formed thereon theV upwardly projecting flange 42" the horizontal surface 42, and the downwardly projecting flange 42. The parts are put together to be operated upon as illustrated by the broken sectional figure, Fig. la.

In the several figures of the drawings, 1 represents a standard, which, together with the lateral projections 2, 3, 4 and 5, and the extensions 1 and 5', constitute the main frame of the machine which supports the operative seaming mechanism of the machine, while the frame 6 supports the can carrier mechanism.

7 is a standard having a journal box, 7.', at its top, in which rotates the horizontal shaft 8 that is journaled in the standard 1, as .illustrated by Fig. 1. At the outer ends of the lateral projections 2 and 3 are boxes or jour- Vnals, 2 and 3', in which rotates a vertical 5 at thel top ot' the extensions l and 5,and\

a drive-pulley, 12,is fixed upon said shaft between the journals l and 5,.` 4To the outer IOO end of the shaft that is carried in the journals 1 and 5" is fixed a beveled gear, 13, which meshes with a beveled gear, 14, thatis fixed to the upper end of the vertical shaft 10. At the outer end of the lateral projection 5 is a journal 5', which journal 5 is preferably made of considerable length for carrying the vertical shaft 15. There is fixed upon the vertical shaft 15, below the journal 5"', a ring,15,to prevent vertical movement of the shaft 15. Upon said shaft 15, above the journal 5"', is a beveled gear, 16, having a boss 16', which meshes with a beveled gear 17 that is fixed upon the inner end of the shaft that is carried in the journals 1" and 5". Upon the lower end of the vertical shaft 15 is a gripping disk, which disk consists of the disk or plate 18 having a boss 18', into which boss there is a bore into which enters a shank, 19, formed upon the lower end of the vertical shaft 15. Around said shank there is formed a groove, 19. A pin, 18", passes through a bore horizontally through the boss 18', said pin 18 fitting into the groove 19 of the shank 19. This construction of the holding plate or disk 18, boss 18', and shank 19 allows the shaft 15 to rotate while the gripping disk or holder 18 remains stationary, and the pin 18 prevents the holder 18 from becoming detached from the shaft 15 when there is no pressure upon the under side of the holder 18.

The detailed description so far given of my machine describes parts of the machine which are not new, and constitute no part of the present invention, except as they are combined with the parts that are herein described as new.

The particular seaming mechanism which separately and in combination with other parts of the machine that are old constitutes the main part of my present invention is particularly described in the following paragraph. The other improvement, which relates to the manner of locking the spindle of the can carrier disks when elevated, and ,which separately and in combination with other partsof the machine constitutes a part of my present invention, is hereinafter particularly described.

Upon the shaft 15 there is fixed a cross-bar, 20, which cross-bar rotates with the shaft 15. Lateral slots, 20 and 20, are made in said bar 20. At one end of the cross-bar 2O is pivoted a double swing lever, 21, by means of a pivot, 22, which passes through a slot, 20', which pivot, 22, has adjustment in the slot 20 and can be fixed at any point by means of the nut, 22", which is screwed upon one end of the pivot 22. A spring, 21, has its upper end attached to the upper end of the double swing lever 21 and its lower end attached to the washer 23. The object of this spring 21 is to keep the upper end of the double swing lever 21 thrown in as far as possible for the reasons hereinafter stated. At the opposite end of the crossbar20 is pivotcd a like double swing lever, 25, which double swing lever 25 has its upper arm longer than the upper arm of the double swing lever 21, while the lower arm of the double swing levers 25 and 2l are the same length, as illustrated in Fig. 1, and by Figs. 9, 10, 11 and 12. Said double swing lever 25 is pivoted in the slot 20 of the crossbar 2O by means ot' a pivot, 26, havinganut,

26', for adjusting the pivot 26 in the slot 20, as illustrated. A spring, 27, has its upper end attached to the upper end of the double swing lever 25 and its lower end attached to the washer 26, as illustrated, to throw the upper end of the double swing lever 25 in as far as possible, for the purpose hereinafter stated.

The lower end of the double swing lever 25 has journaled thereon a seaming disk, 28, of the form illustrated by Figs. 13 and 14, while the lower end of the double swing lever 21 has a seaming disk, 30, of the form illustrated by Figs. 15 and 16, journaled thereon.

While the form of the seaming disks is seen in Figs. 9, 10, 11 and 12, their form is best seen illustrated by Figs. 13, 14, 15 and 16. The seaming disk that is carried by the lower end of the double swing lever 25 has a face that has a beveled edge, 2S', and a groove around its face which forms a bevel 29, leaving the upper side of the rim formed by the face 28 slightly grooved out, as seen at 28, while the top of said seamer is flat, as illustrated. The face of the seaming disk 30 that is journaled upon the lower end of the double swing lever 21 is but slightly beveled, as illustrated by Fig. 16. Upon the vertical shaft 15, above the cross-bar 20, there is loosely sleeved an irregular cone, 31. Through the upper ends, 21 and 25 of the double swing levers 21 and 25, pass horizontally rods 32 and 33 which carry upon their inner ends friction rollers, 32 and 33',which are adapted to travel in engagement upon the varying surfaces of the cone31, asillustrated by Figs. 9, 10, 11 and 12. Said rods 32 and 33 have lateral adjustment by means of set-sere ws 2l" and 25". From the upper side of the cone 3l project vertical rods, 32" and 32', which vertical rods pass through a sleeve, 34, that is loosely mounted upon the shaft 15 above said irregular cone 31. Said vertical rods 32" and 32 have vertical adjustmentiu the sleeve 31 and are fixed therein by means of the set-screws 34E and 3-1. A rockinglever, 35, passes through an opening in the standard 1, which opening is indicated by the dotted lines 1 in Fig. 1. The rockinglever 35 is pivoted between the lugs 36 and 36 that project from the front of the standard 1. One end of said rocking lever 35 carries a yoke, 37, through the arms of which yoke pass studs, 38 and 38', that project from the ring 34 that fits in an annular groove of the sleeve 3-1, so that by the tipping of the rocking lever 35 the sleeve 34 is raised and lowered and so raises and lowers the cone 3l. As the sleeve 3l is supported by the yoke 37 through the IOO Y ring 34', the sleeve 34 may remain stationarythem, Vor the sleeve 34 and cone 31 may turn with the shaft 15, their rotary movement being controlled by friction. 1t is not essential that said sleeve 34 and irregular cone 31 rotate with the shaft 15, or that they have no rotary movement. If desired, the sleeve 34 and the irregular cone 31 may be made to turn `simultaneously with the shaft 15 by means of a key, a featheror other mechanism. I`prefer to leave said sleeve 34 and irregular cone 31 free to turn or not to turn (as controlled by friction) with the shaft 15, as illustrated, as the wear of the cone 31 by the friction rollers 32 and 33 will be more evenly distributed around the cone tha-n would `be the case were the cone 31 made t0 rotate simultaneously with the shaft 15, .in which construction the travel of the friction rollers 32 and 33 would always be in one line up and down the cone 31.

Upon the outer or back end of the rocking lever 35 is journaled a friction roller, 39,

which friction roller travels over the cam which is fixed upon the vertical shaft 10.

Said cam 40 has upon its upper side the stepsV 40, 401', 40C, 40d, 40c and 40f, with the inclines 40a', 40h', 40C', 40d', 40?', and. 40". rlhe friction roller 39 travels over said steps and inclinesof the cam 40 and is-held in engagement -therewith by lneans of the spring, 41, which has its upper end attached to the outer end of the rockinglever 35 and its lower end secured to the standard 1 by means of`the bolt 41,as illustrated. The vsteps and inclines of the cam 40 and the varying faces of' A the irregular cone 31 are made relatively to each other for the purpose of performing the different steps of seaming one of the ends upon a can body by bringing automatically the seaming disks 28 and 30' to operate alternately and conjointly upona can and ,release both from the can upon the completion of the operation of seaming. When the friction roller 39 is upon the step 40a of the cam 40, the irregular cone 31 isheld in such position as that the seaming disks 28 and 30 are free of the can, as seen in Fig. 1.

In the drawings, the friction roller 39 is shown `at the completion of its travel over the step 40"-of the cam 40`and about to start upon its travel up the incline 401).. `During the travel of the friction roller 39 over the step 409, the parts of the seaming device are in the position illustrated by Fig. 1. As the friction` roller 39,- travels up the incline 40h of the cam 40, the friction roller 33' that is carried'by the double swing lever 25 will come in contact with the lower edge of the inclined face 31k of the irregular cone 31 and throw in the seaming disk 28 so as to turn in the'iiange 42 ofthe can top 42, as illustrated'byFig. 1b.' In this operation, the bevel 29 of the seaming disk 28 engages the edge of the flange 42', the lower edge ofy said flange passing down toward the groove 28 of the seaming disk 28. This position of the parts (not illustrated) is controlled by the step 40b of the cam 40. The shaft 15 makes one revolution-so as to make the seaming disk 28 travel once around the can with the friction roller 33 in contact with the lower part of the inclined face 31k ofthe irregular icone 31 while the friction roller 39 travels over the step 40b of the can140, to turn the flange 42 inwardly, as illustrated by Fig.

1b, around the can.' The friction roller 39 then travels up the incline 40G of the cam 40 to the step 400, which brings the parts of the seaming device to the position illustrated by Fig. 9. In this position, (Fig. 9) which is the 1 second step in the operation upon the can, the friction roller 33 is in engagement with the upper part `of the inclined facey 3lk of the irregular cone 31 while the friction roller 32 is in engagement with the lower part of the inclined face 3lr of the irregular cone 3l, in which position the seaming disk 30 is still free of the can. The turning of the grooved seaming disk 28 against the can while theparts are in the position illustrated by Fig. 9, bends the flanges 42 and 43 to the position illustrated by Fig. 9a. have made one-half a revolution in the position indicated by Fig. 9, during the travel of the friction roller 39 over the step 40c of the cam 40, the travel of the friction roller 39 up the incline 40d to the step 401 brings the parts of the seaming device to the position indicated by Fig. 10 with the friction roller 33 against thel vertical face 311 andA the fric` tion roller 32 against the upper part 31r .of the irregular cone 31. The travel of the seaming disk 28 against the can bends the ianges 42 and 43 to the position shown by Fig. `9.

In order to save time, the seaming disk 30 is When' the seaming device shall IOO brought into contact with the bent anges' 42 and 43 upon a half revolution on the step Y can, and the friction roller 32 upon the en'- :regular cone 31 to free the disk 28 from the larged (vertical face 311: ofthe irregular cone 31 to make the seaming disk 30 flatten the flanges 42land 43 down upon the can body 43 and upon each other to complete the double seam,` as illustrated by Fig. 11,

The operation of the several movements of the seaming device will be clear by associating the travel of the friction roller 39 over `the step 40 with the can parts as Vshownby Fig. la, as they are put into the machine-and gripped between the can carrierdisks 49 and the gripping disk 18; the first movement of the seamer, which is duringthe travel of the friction roller 39 over the step 40", bends the flange 42 to the angle shown by Fig. 1"; the second movement of the seamer, during the travel of the friction roller 39 over the step 40C, brings the parts to the position illustrated by Fig. 9 and bends the flanges 42 and 43 of the can body and top to the angle shown by Fig. 9a; the third movement of the seamer, during the travel of the friction roller 39 over the step 40, brings the parts to the position illustrated by Fig. 10 and bends the flanges 42 and 43 of the can body and top to the angle shown by Fig. 10 the fourth movement of the seamer, during the travel of the friction roller 39 over the step 40,brings the parts to the position illustrated by Fig. 11 and bends the flanges 42 and 43' of the can body and top to the angle shown by Fig. 11 and completes the double seam. The travel of the friction roller 39 over the step 40f brings the friction roller 32' opposite the deep groove 31 and the friction roller 33 free of the irregular cone 31 so that the parts are in the position shown by Fig. 12 to let the com pleted can pass out. The return of the friction roller 39 to the step 40a of the cam 40 returns the parts of the seamer to the position shown by Fig. 1 ready to repeat the operation described.

The object of the springs 24 and 27 is to spread the seaming disks 28 and 30 to make them clear the can upon the completion of the operation of seaming, as shown by Fig. 12.

In the following paragraph I describe the intermittent rotary can carrier with its chucks or disks, and the means employed for elevating the disks of the can carrier to grip the can. Said parts of the machine constitute no part of my present invention, except as they are combined with the parts hereinbefore and hereinafter described as new.

The vertical shaft, 44, stands in a journal block 45, passes through a journal 6 of the frame 6, and has keyed upon its upper end a can carrier frame 46. Said frame consists of a circular band or rim having spokes or arms terminating in a central hub, as illustrated in the plan Fig. 3. Upon the vertical shaft 44 is fixed a drive-gear, 47, as seen by Figs. 1 and 2. Upon the inner end of the horizontal shaft 8 is fixed a mutilated beveled gear, 48, which meshes with the gear 47. The size of said gears 47 and 48 and the number of teeth upon the mutilated gear 48 and upon the gear 47 must so correspond to each other as that each revolution of the shaft 8 will rotate the can carrier table,46, far enough to bring successively the several can carrier disks, 49, under the gripping disk or pad 18. rlhe shaft 15, carrying the upper gripping disk 18, is above the plane of the orbit of the can carrierdisks49. Said disks 49 have spindles, 50, which project through boxes or bearings, 46, formed around the carrier frame, as illustrated by Fig. 8, and have vertical movement in said bearings 46', but have no rotary movement therein. Rotary movement of the spindles 5() and the can carrier disks 49 may be prevented by making said spindles square and letting them pass through asquare socket, or by the meansillustrated, which consists in a pin, 51', projecting from the lower end i of the spindle 50, the pin 51 projecting between the bars 52, 52', as illustrated by Figs. 1, 2 and 8. Upon the shaft 8, below the orbit of the spindles 50, is a cam 53. At the outer end of the lateral arm 4 of the main frame is a box, 4, through which a plunger, 54, works vertically, said plunger having upon its lower end a friction roller, 55, which travels over the face of the cam 53. The cam 53 is so placed upon the shaft 8 as that with each intermittent rotary movement of the can carrier 46 as it brings successively the can carrier disks 49 vertically under the can gripping disk 18, said cam 53 forces up the plunger 54 so as to raise the spindle 50 and the can carrier disk 49 to grip between the can carrier disk 49 and the can gripping disk 18 a can, as illustrated by Fig. 1.

The miter gears 9 and 11 make the shaft 8 revolve correspondingly with the vertical shaft 10, while the gears 14 and 13"and 17 and 16 are so made with reference to each other as that the shaft 15 carrying the can seaming device makes nine revolutions while the shaft 10, having thereon the cam 40, makes one revolution; and the rotary can carrier frame 46 rotates from one can carrier disk 49 to the successive can carrier disks 49 with one revolution of the shaft 8, one revolution of the shaft 10 and nine revolutions of the shaft 15. The vertical shaft 15 may be geared to a higher or a lower relative speed than stated, if desired; but that given is preferable.

The parts of my machine described in the following paragraph are new, and separately and in combination with other parts of the machine constitute a part of my present invention.

Figs. G and 7 illustrate a chuck-locking device which I employ for locking the chucks or spindles 50 while they are elevated by the plunger 54 to grip a can to be operated upon. A lock-frame, 56, having an upper arm, 56', and a lower arm, 56", is made to reciprocate back and forth as described in this paragraph. Said lock-frame 56 rests with its lower arm 56" in slide-ways upon the top of the journal 4', and the plunger 54 passes vertically through the opening 56 of the lower arm 56". Said opening 56 is elongated so as to allow the lock-frame 56 to reciprocate back and forth. A horizontal bar, 57, is attached to the back end of the frame 56, and passes through the standard 1, as illustrated by Figs. l and 3, and has upon its back end a hook, 57. Upon the vertical shaft 10 is fixed a disk, 58, having a vertical pin, 58', which with each revolution of the shaft 10 comes in engagement with the inside of the hook 57 of the bar-57, which forms a catch, and throws ICO TIO

tary can carrier frame 46 shall have been moved forward to bring the succeeding can carrier disk -below the can gripping disk 18, the p1n,`58 by the rotation of the shaft 10, becomes disengaged from the hook 57,and the spring 59, which is interposed between the frame 56 and the standard 1, throws said lock forward to engage the spindle 50 of the succeeding carrier disk, Vand lock the same, by\.fr1ctional contact therewith as illustrated. This locking device is to make more rigid and firm the spindles 50 and can carrier disks 4 9 while a can is gripped between a can carrier disk 49 and the gripping disk 18 to be seamed.

My improvement is adjustable for scanning cans of various sizes by the Vertical adj ustment of the shaft 15 through the bevel gear 16, the adjustment of the irregular-cone 31 upon the shaft 15 by the set-screws 34, and

the lateral adjustment of the bars 32 and 33r by means of the set- screws 21 and 25".

The construction and operation of my improved machine foil seaming the ends upon cans, have now been fullydescribed. It is only necessary to state that the parts of the cans having been prepared as already described, an operator takes said parts and puts them together and sets them upon the can carrier disks 49, and as the cans are completed after being operated upon, the cans are removed from the opposite side of the machine.

lt willbe seen that by my improved machine tin packages may be filled after having one end seamed thereon and the opposite end put upon the filled package. As the package is held perfectly stationary during the operation of scanning, there is no shaking, splashing, or spilling of contents, and a perfectly solid double seam is formed around the end joints of the can or package.

What I claim as my invention, and desire to secure .by Letters Patent, is-

1. The combination of an irregular cone, a d ouble swing lever, and a seaming disk carried by the double swing lever, substantially as illustrated and described.

2. An irregular cone,a double swing lever, a seaming disk carried by the lowerl end of the'lever and a friction Yroller carried by the upper end of the lever, substantially as illustrated and described.

3. The 'combination of a vertical shaft, an irregular cone upon the vertical shaft and havingmovement thereon, a cross-bar fixed` upon the vertical shaft, double swing levers pivoted to the cross-bar, and seaming Adisks carried by the double swing levers, substantially as illustrated and described.

4. A vertical shaft, an irregular cone upon the vertical shaft and having movement thereon, a cross-bar fixed upon the vertical shaft, slots laterally through the cross-bar near its ends, double swing levers pivoted in the slots of the cross-bar, and seaming disks carried by the double swing levers, substantially as illustrated and described.

5. The combination of a vertical shaft, an irregular cone upon the vertical shaft and having movement thereon, a cross-bar fixed to the vertical shaft, double swing levers pivoted to the cross-bar, seaming disks carried by the double swing levers, a cam having a series of steps and inclines, and intermediate connection between the cam and the irregular conewhereby the irregular cone is lowered and raised upon the vertical shaft by the rotation of the cam, substantially as illustrated and described.

6. The combinationof a vertical shaft, an irregular cone upon the vertical shaft, acrossbarfixed to the vertical shaft, slots laterally through the cross-bar near its ends,vdouble swing levers pivoted in the slots of the crossbar, seaming disks carried by the double swing levers, a cam having a seriesof steps and inclines, and intermediate connection between the cam andthe irregular cone wherebythe irregular cone is lowered and raised upon the vertical shaft by the rotation of the cam, substantially as illustrated and described.

7. The combination of a vertical shaft, an irregular cone upon the vertical shaft, a crossbar fixed to the vertical shaft, double swing IOO levers pivoted tothe cross-bar, seaming disks i carried by the double swing levers, a sleeve upon the vertical shaft above the irregular` cone, any suitable connection between said sleeve and the irregular cone, a rocking bar having connection at one end with said sleeve and its opposite end being operated by a cam having a series of steps and inclines, substantially as illustrated and described.

8. The combination, in a can seaming ina- IIO chine, of a lock for the spindles of the can i carrier disks consisting of a lock-frame having two arms, the upper arm being shorter than the lower arm, the lower arm having a slot through it, a horizontal bar having one end attached to the lock-frame and the opposite end provided with a hook,a rotating trip to engage said hook to withdraw the frame, and a spring to return the lock-frame upon the release of the hook from engagement with the rotating trip, substantially as illustrated and described. f 9. The combination, in a can seaming machine, of a vertical shaft carrying a can carrier frame having an intermittent rotary movement, can carrier disks having spindles journaled around said frame, a plunger below the orbit of the spindles, a cam below the plunger adapted to raise the spindles as the spindles successively come over the plunger in their travel at the end of each intermittent movement of the can carrier frame, a

vertical shaft above the orbit of the can carrer disks, said shaft carrying on its lower end a gripping disk, an irregular` cone upon the Vertical shaft carrying the gripping disk, a cross-bar attached to said vertical shaft, double swing levers pivoted to said cross-bar, a vertical shaft having thereon a cam provided with steps and inclines, intermediate conneotion between said cam and the irregular cone whereby the cone is lowered and raised by the rotation of the cam having a series of steps and inclines, substantially as illustrated and described.

10. The combination, in a can seaming machine, of avertical shaft having fixed thereon a can carrier frame, can carrier disks having spindles journaled around the can carrier frame, a drivegear fixed upon the vertical shaft of the can carrier frame, a horizontal shaft having fixed thereon a cam below the orbit of the spindles, a mutilated pinion to mesh with the gear that is fixed upon the vertical shaft of the carrier frame, a plunger above said cam and below the orbit of said spindles,al0ck forsaid spindles adapted to engage and lock successively the spindles after each intermittent movement of the carrier frame, a vertical shaft above the orbit of the can carrier disks, a gripping disk upon the lower end of said vertical shaft, an irregular cone upon the vertical shaft above the orbit of the can carrier disks, a cross-bar fixed upon the same vertical shaft, double swing levers pivoted to said cross-bar, seaming disks carried by the double swing lovers, a vertical shaft having fixed thereon a cam having a series of steps and inclines, driving connection between the horizontal shaft and the vertical shaft having fixed thereon a cam with inclines and steps, and intermediate connection between the cam having a series of steps and inclines and the irregular cone whereby the irregular cone is lowered and raised by the rotation of said cam, substantially as illustrated and described.

In testilnonywhereof I afiixni y si gnatu re, in the presence of two witnesses, this 29th day of November, 1803.

JOHN W. ROBERTS.

Witnesses:

J. A. OSBORNE, W. M. FAwoE'r'r.

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