US496354A - fairman - Google Patents

Description

6 Sheets-Sheet 1.

(No Model.) A. N. 'FAIRM AN. MACHINE FOR MAKING STOVBPIPB ELBOWS.

No. 496,354. 7 w Patented Apr. 25, 1893.

' I @31 ltd WW1 I (No Model.) 6 Sheets--Sheet 2. A. N. FAIRMAN. MACHINE FOR'MAKING STOVBPIPE BLBQWS. No. 496,354.

Patented Apr. 25, 1893.

(No Model.) 6 Sh eets-Sheet 3.

A. N. FAIRMAN. MACHINE FOR MAKING STOVEPIPE BLBOWS. No. 496,354.

Patented Apr. 25, 1893;

6 Sheets-Shet 4. a I

(No Model.)

A. N. F'AIRMAN. MACHINE FOR MAKING STOVEPIPB ELBOWS. No. 496,354.

Patented Apr. 25, 1893.

(No Model.) 6 Sheets-Sheet 5.

A. N. FAIRMAN. y MACHINE FOR MAKING STOVEPIPE ELBOWS.

No. 496,354 Patented Apr. 25, 1893.

6 Sheets-Sheet 6.

(No Model.) A. N. FAIRMAN, MACHINE FOR MAKING STOVEPIPE BLBOWS.

No. 496,354. Patented Apr. 25, 1893.

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UNITED STATES PATENT OFFICE.

ALFRED N. FAIRMAN, OF MONTREAL, CANADA, ASSIGNOR OF ONE-HALF TO FREDERICK FAIRMAN, OF SAME PLACE.

MACHINE FOR MAKING STOVEPIPE-ELBOWS.

SPECIFICATION forming part of Letters Patent No. 496,354, dated April 25, 1893.

Application filed October 29, 1892. Serial No. 450,399- (No model.)

To all whom it may concern.-

Be it known that I, ALFRED NELsoN FAIR- MAN, of the city of Montreal, in the District of Montreal and Province of Quebec, Canada, have invented certain new and useful Improvements in Machines for Making Stovepipe-Elbows; and I do hereby declare that the following is a full, clear, and exact description of the same.

This invention has for its object to produce a power driven machine capable of speedier action with consequently a larger outputduring a given interval of operation than those at present in use and requiring less attention, the several features of importance being: the adjustability of the face plate carrying the crimpers used in these machines whereby the extent of crimp or crease can be regulated to accommodate different grades of iron (the harder quality requiring a deeper crease than the softer); a rolling or divided impact of the crimpers as distinguished from a single direct impact; the adjustability of the compressor head; a special means of holding the pipe or blank upon the feed carriage, and the automatic stopping of the machine at the completion of each elbow. For full comprehension however of the invention, reference must be had to the annexed drawings forming a part of this specification in which like symbols indicate corresponding parts and wherein Figure 1 is a side elevation of the machine; Figs. 2, 3, and 4 front elevations with crimpers in, respectively, their normal position and positions during their impact upon the pipe and after completion of the crimp. Fig. 5 is a front elevation of the machine with the crimpers and their operating mechanism removed showing the construction of the face plate. Fig. 5 isadetail sectional view showing sliding connection of crimpers to faceplate; Fig. 6 a transverse vertical section, on line so a: Fig. 1, showing gear mechanism for com municating motion from the main driving shaft to the several main operating parts of the machine; Fig. 7 an enlarged transverse vertical section of the machine, on line y y Fig. 8 showing parts of the feeding mechanism in elevation and the internal shaft and cam mechanism for operating the movable-headedsleeveand hinged compressor-head. Fig. 7 is a detail plan view of thelocking device for longitudinal vertical section of the headedsleeve, compressor-head and their operatin mechanism in the same position as shown iii Fig. 8 but with the crimpers in their operating position upon the pipe; and Fig. 10 is a similar view to Fig. 9 of the same parts, showng the compressor-head in position to compress and compressing a crimp in the pipe- Fig. 11 being a similar View to Fig. 10 of the same parts, showing the headed-sleeve with the compressor-head drawn inward to turn over and flatten the crimp upon the inside.

The frame work or body of the machine consists in the main of table A supported on l s A A a front standard B bolted to the top of the table A, and a rear standard C also bolted to the top of the table and having cast; in one with it a horizontal sleeve or cylinder C extending between the two standards but having no connection with the front one, its

forward open and flanged end simply entering a short distance into a circular flan ed opening D faced with a steel ring D in the standard B andleaving just sufficient clearance for the passage of the metal of the stove pipe between it and the edge of the openin and the rear end being closed by a disk c bolted in place. A further support 0 for the cylinder 0 is cast upon it a short distance forward of the rear standard C and also bolted to the top of the table, and the standards B and C are also strengthened by a brace or stay'C extending between and bolted to them. In addition to this main portion of the frame a leg or standard E is located some distance to the rear thereof and serves with the rear standard C on such main portion to furnish bearings respectively for the main driving shaft F and a counter shaft G.

Inserted in the cylinder C is a second or internal cylinder H ofa size which allows it to fit snugly and slide easily therein, the inner end being open and the outer end closed by a head 11 constructed with an annular flange h of the same diameter as the flanged end of the cylinder and such diameter corresponding with that of the interior of the stove pipe to beoperated upon,while hinged at h to the face of the head H toward the lowest point of its circumference,isaring H forming what I term the compressor-head, the annular opening in such ring accommodating the projecting hub or extended bearing 7L2 on the face of the head II and the projecting end of a shaftI, which shaft extends entirely through the cylinders, the bearing 72 and another bearing formed by disk 0 and further projects rearward in a position between and parallel to the shaft F and G.

The shaft I carries on its inclosed portion two grooved cams J, K (having grooves J K) which are combined with roller and rod connectionsj, 7t and respectively for operating the hinged compressor-head II. and the headed cylinder II as will be more particularly described in the operation of the machine; the rollerj being mounted on a stud j projecting from the inner side of the cylinder II into the groove J of the cam J and the roller 7c, fitting the groove K, being similarly arranged on the inner end of the rod 7t" which slides in a channel or way 70 formed for it through the head II of the cylinder H, the outer end of the rod being passed through an aperture 70 in the hinged compressor-head II and connected so as to oscillate same,bya bearing collar 70 and an adjustable bee ring nut 70 located to bear respectively against the inner and outer sides of such hinged head. The adjustability of the bearing nut 70 makes it possible to increase or diminish the working space between the compressor head II and the cylinder head 11 so that more or less metal can be used in forming the crease. The rearwardly projecting portion of the shaft I having its rear bearingin the disk 0, carries a double gear wheel L L loosely mounted and with clutch facing on the part L, collars ii i and a clutch block L feathered on said shaft and adapted to be interlocked at invervals with said part L as will be hereinafter described.

On the face of the front standard 13 is arranged the face-plate formed in two sections M M rendered adjustable by horizontal and vertical slots on m, formed respecti vely i n such sections and the standard, through which suitable fastening bolts M are passed (the face plate and the standard itself taken together forming what I term a stationary front sup port. in the claims hereinafter presented), and on the faces of such faceplate, sections in turn are arranged to slide the crimpers, formed of iiat plates N N preferably somewhat of a crescent form in outline and having their inner or concave edges so shaped, relatively tovthe circular form of the pipe to be crimped and their movement so regulated that only a portion of each edge bears on the pipe at one time, the application being in effect a rolling or divided one as distinguished a weaker or softer quality of metal can be operated upon without fear of cutting the pipe. The movement, or, more properly, the direction of movement, of the crimpers is governed or determined by the shape of slots N N N N, in the face plates M M, in which travel pins or bolts n projecting inward from the crimpers to which they are secured by nuts 01' screwed onto the diminished threaded end sections of the bolts which at their opposite ends have heads n that are accommodated by grooves n, in the standard corresponding in form to the slots N N in the face plate sections but of increased size so as to allow free movements of the heads 01 even when adjusted with such face plate sections M M to different working positions.

The bolts a carry roller sleeves n, to bear in the slots l N and it will be noticed on referring to Fig. 5 that the crimpers are not held against the surface of the face plate sections but against the shoulders n" of the bolts.

The shapes of the slots N N and the travel, or action, of the crimpers determined thereby, are shown clearly in Figs. 2, 3, t and 5 and I may point out that the upper portions of the concave edges of the crimpers are first caused to act upon the pipe and then the lower side portions, as will be more fully described in the operation of the machine. In some cases where the obtaining of an even quality of metal for working upon is a certainty and the necessity for adjustment avoided it might be desirable to dispense with the face plates altogether, under which circumstances the guiding slots for the crimpers could be formed in the front standard or support itself.

The crimpers are actuated by means of toggle-bars O 0 connected to a cross-head O suitably guided, to which intermittent vertical reciprocating movement is imparted by a connecting bar O from a crank disk 0 mounted on the end of a shaft 0 which is carried in the upper ends of the standards B and C and projects rearward sufficiently beyond the latter to carry a loose gear wheel 0", with clutch-facin g, and a clutcl1-block O feathered on the shaft and adapted to engage such wheel.

The main driving shaft F carries a spur gear F, a loose pulley F with clutch-facing and a clutch-block F feathered on the shaft and adapted to be automatically thrown out of clutch with the pulley at the completion of each elbow as and by mechanism described farther on.

The counter shaft G carries (in addition to a gearwheel intermeshing with the part L of the double gear wheel L L on the shaft I,) two disks G G in the peripheries of which similarly-shaped (zig-zag) cam-grooves g g are formed to receive and operate the ends of levers G G3 fulcrumed at g to the projecting hub bearing F (on the standard 0 for the shaft F) and respectively pivotally connected with the clutch blocks L and O on the shafts from a single direct impact and in this way I I and O; the levers G and G being respeetwhich breaks, each to the other, in the two disks, in about a quarter of a turn apart as shown in Fig. 6, this arrangement being for the purpose of allowing the two breaks 9 to act simultaneously upon rollers P P carried on the under sides of the feed propelling toothed bars P P arranged on opposite sides of the machine and adapted to slide in bearings p p, p p and 10 19 on the respective standards 0, and E, and to rest at their forward ends on supportsp p standing 11p from the table A.

The feed carriage may be of any of the usual forms although I prefer the kind consisting of a ring formed of two sections Q Q having coincident face flanges Q Q and side projections Q Q for bolting together as at q, such projections being also pierced to fit over a pair of toothed check bars R R extending between and connected to the standards B,

C and such sections further carrying vertical guides S S, respectively for vertically movable dogs or bolts 8 5 adapted to engage the toothed bars P P and R R respectively, a flexible clamping band or ring T and lever T for operating it to hold the pipe upon the flanges Q Q and a connecting transverserod T with handle T and pivoted links T for operating the several dogs or bolts together, completing this part. The clamping band or ring T and lever T form a special feature of my present invention and as will be seen on reference to Figs. 7, 8, and 8 the ends of the band are separated turned up and sideward or backward as at t in Figs. 7 and 8 to carry upwardly projecting pins t t, suitable recesses q q being formed in the face of the carriage section Q to accommodate them, and on the projecting portion q forming the division between said recesses the lever T is pivoted as at P. This lever is morein the form of a flat disk-like block with a handle portion,

in such block being formed eccentric slots 15 in which the upwardly projec tingpins 25 If fit and when the lever is turned the ends are drawn in toward each other and the band contracted. This arrangement of the eccentric slots 25 23 does away with the necessity for any locking mechanism such as apawl and ratchet as the lever disk when turned into the locking position cannot be moved except by turning the handle, the slots serving both to contract and lock the band.

In order to stop the machine automatically lowing mechanism: Abar Uparallel with the I toothed bars P and Ris arranged on one side,

of the machine between such ed to slide at its rear end ina at its forward end in a bearing p cast in one with the support 19 On the upper side of this bar U projecting teeth to u are formed respectively toward the rearand forward ends, in order that a detentUdepending from the under side of the projection Q3 of the carriage section may engage them-(as fully described farther on) to move the barineitherdirection so as to raise and lower a pivoted pawl U resting on the projecting rear end of the bar, out of or into a notch U in the upper side of the feed bar P. The the lower end of a vertical leverVfulcrumed at v to an arm V projecting from the standard O and having its upper end connected by a rod V witha second lever V fulcrumed at o to an arm V projecting from the standard E and having its inner end forked and connected in the usual way with the clutch block F on the main driving shaft F. This lever V can also serve as the hand lever for starting the machine, a suitable handle portion being provided. I

The operation fthe machine is as follows: To commence operations the feed carriage is placed back so that the dogs or bolts 8 s are engaged with the last teeth of the feed and check bars P R, the depending detent' U located just infront of the rear tooth u on the bar U and this latter holding the pawl U out of the notch in the feed bar P as shown in pawl U is pivoted 'to .at the completion of each elbow Iuse the fol-' .70 j bars and adaptf bearing 19 and.

Fig. 1, and when the crimpers N N are in their elevated or normal position as shown in' Fig. 2, and the internal cylinder H with the compressor-head H thrown outward, the pipe X to be operated upon is inserted and clamped at its inner end upon the flanges Q of the feed carriage by the clamping band or ring T and its lever T as shown in Fig, 8. At this time, also,the clutch blocks L O on the re- .respective shafts I and O are in the positions shown in Fig. 8, i. e. the latterin clutch with the gear wheel 0 on the shaft 0 and in Fig.8. The machine being started the first parts to be operated are the driving shaft F, and the shafts O and G, the former 0 through the gear wheel 0 on same which is in mesh with the spur gear wheel F carried by the main shaft 'F, and the latter G through the loosely mounted double gear wheel L Lon the shaft I, the rotation of the shaftO (through the clutch block 0 for a complete turn being sufficient to depress and elevate the crimpers N N while the slots N N in the face plate sections M M determine the particular character of the impact which,

as before remarked, is of a rolling or divided nature as distinguished from a single direct impact and the following detailed description I I 5 the former freed from the gear wheel L on .the shaft I, and furthermore, the cams J, K, on this latter shaft are in the positions shown of the .form of such slots will make the movement clear. The upper slots N N are for abouta third of their length or between the points 1 and 2 slightly inclined inward from their top ends, the remaining portions of each being inclined from the point 2 outward at about an angle of forty-five degrees to the vertical, and slightly curved, while the lower slots N N at their top ends correspond with the top ends of the upper slots in pitch orinclination, although not for the same distance, as they require to be shorter and turn inward as soon as the crimpers have traveled down sufficiently to effect the crease at the top of the pipe as between the points 3-4 Fig. 3, in order that the crimpers will be closed together more at their bottom points (the crimpers at this time actually oscillating on the upper pins 07. n which for the time being act as traveling axes or pivots) and so extend the crease in a gradual fashion down the sides of the pipe as between the points 4-5 Fig. 4, after which the lower pins 1?. drop down the lower and more vertical portions of the slots N N and become axes on which the crimpers oscillate and fall outwardly into the dotted position shown in Fig. l, the upper pins a following the outwardly inclined lower portions of the slots N N. The elevation of the crimpers is in effect simply their free return in contact with the pipe but without pressure upon same, to the position shown in Fig. 2. By the time the crimpers have acted as just described the disks G G (being fixed on the counter shaft G and such shaft runnin g permanently with the main driving shaft as before mentioned through the fixed gear wheel g the loose double gear wheel L L on shaft I and the fixed gear F) have made a half revolution and the cam grooves therein now reverse the positions of the levers G2 G so that the shaft 0 remains motionless and the shaft I is rotated through the clutch block L being connected with the double gear wheel L L the result of which is as follows: The inclination of the groove K on the cam K as between the points 67 (see Figs. 8 and 9) serves, upon the quarter rotation of the shaft I, to draw the compressor-head H inward to the position shown in Fig. 10 necessary to compress the crease, and, following this, the corresponding inclination of both grooves J K in the cams J, K, as shown in Fig. 10, upon another quarter turn of the shaft, causes the inward movement of the internal cylinder II and the compressor-head II as a unit to the position shown in Fig. 11, with the result that the compressed crease is folded back fiat upon the remaining portion of the pipe, which has a solid bearing upon the steel ring D in the opening D of the standard B, and the third quarter turn of the shaft effects the reverse or outward movement of the cylinder and hinged compressor head together, while, lastly, the remaining quarter of rotation serves to set such com pressor head in its original or normal position. Simultaneously with the third quarter turn of the shaft I, just described, and the outward movement of the cylinder and compressor-head together, the feed bars P P are thrown forward by the sideward pitches orbreaks g in the grooves of the disks G G and the carrier, with the pipe, thereby fed forward so that the operation just described can be repeated until finally the detent U, depending from the carrier, comes in contact with the tooth it at the forward end of the barUand by moving same, with it, the pawl U is allowed to drop into the notch U in the feed bar P, so that upon the next forward throw of same the pawl will be pushed along and consequently the lever V with the result that the machine is stopped through the rod and lever connections V V and the clutch block F on the main driving shaft F. After the machine has stopped, the finished elbow is removed, the dogs 5 s are elevated simultaneously through the transverse rod T and pivoted links 1", the carriage set back as before, and a fresh pipe inserted.

Vhat I claim is as follows:

1. In a machine for making stove pipe elbows, the combination with means for holding the pipe to be operated upon, of movable crimpers adapted to be adjusted bodily to different working positions relatively to said pipe and means for operating said crimpers and for effecting the adjustment thereof.

2. In a machine for making stove pipe elbows, the combination with a stationary front support, means for holding the pipe to be operated upon and movable crimpers,of an adjustable face plate adapted to be adjusted to different positions relatively to said pipe and connections between it and said crimpers for the purpose set forth.

8. In a machine for making stove pipe elbows, the combination with the stationary front support, and means for holding the pipe to be operated upon,-of movable crimpers exerting a rolling or traveling pressure upon such pipe in effecting the crease and means for operating said crimpers.

4. In a machine for making stove pipe el hows, the combination with a stationary front support and means for holding the pipe to be operated u pon,-of movable crim pers adapted to be adjusted to different working positions relatively to said pipe and having sliding pivotal connections with said support and mechanism for imparting motion to such crimpers.

5. In a machine for making stove pipe elbows, the combination with a stationary slotted front support and means for holding the pipe to be operated upon,of movable crimpers adapted to be adjusted to different working positions relatively to said pipe and having projections from their rear faces adapted to travel in the slots in said support and mechanism for imparting motion to such crimpers.

6. In a machine for making stove pipe elbows, the combination with a stationary front support having upper and lower pairs of slots IIO ' crimpers.

7. In a machine for making stove pipe elbows, the combinationwith a stationary slotted front support and means for holding the pipe to be operated upon,of,a face plate formed in two side sections slotted to allow of adjustment and also to furnish guides for projections from a pair of movable crimpers, and clamping bolts passing through said adj ustment slots in both supports and face plate sections as set forth.

8. In a machine for making stove pipe elbows, the combination with' the feed carriage having an annular bearing surface or support for thepipe to be operated upon, of a flexible clamping band or ring freely encircling said bearing surface, means for supporting the same, and a lever in the form of a flat disklike block pivoted to said carriage provided with a handle portion and containing eccentric slots in which work projections from the ends of such band or ring for contracting such band, as set forth.

9. In a machine for making stove pipe elbows, the combination with the feed carriage having an annular projecting bearing 01' support for the pipe to be operated upon, of a flexible clamping band or ring freely encircling same, and a lever in the form of a flat disk like block pivoted to said carriage provided with a handle portion and containing eccentric slots in which projections from the ends of said band or ring work for contracting same.

10. In a power driven machine for making stove pipe elbows, the combination with crimping devices, a compressor head, means for folding and flatteningthe crease when formed and stove pipe carrying and feeding mechanism, of a main driving shaft and a counter shaft geared together for simultaneous continuous rotation, and two shafts, one of which has connection with the crimping devices and a the other with the compressor head and the means for folding and flattening the crease, and both having an intermittent alternating rotation, with means for effecting such intermittent alternating rotation, and operating said shafts.

11. In a power driven machine for making stove pipe elbows, the combination with crimping devices, a compressor head, means for folding and flatteningthe crease when formed, and stove pipe carrying and feeding mechanism, of a main driving shaft and a counter shaft geared together for simultaneous continuous rotation, and the said driving shaft carrying a fixed gear wheel; two other shafts and connect-ions between one of the same and the crimping devices and the other of same and the compressor head and the means for folding and flattening the crease, the first mentioned driving and counter shafts carry- 1 1g fixed gear wheels and the two last named shafts carrying loose gear wheels in mesh with said fixed gear wheels; lever and, clutch devices for fixing said loose gears alternately upon their respective shafts and means carried by said counte r shaft for operatingsald leverand clutch devices, as set forth;

i 12. In a power driven machine for making stove pipe elbows, the combination with the stove pipe carrier and the feed bars, and a main driving shaft carrying a loose pulley and clutch mechanism, of lever and rod connections extending from said clutch mechanism to a point adjacent to the top and notched side of one of said feed bars and terminating in a pivoted 'pawl, of a movable support for said pawl adapted to be moved by said carrier to raise or lower the same into or out of contact with the notch in said feed bar, as

set forth.

.13. In a powerdriven machine for making stove pipe elbows, the combination with means for holding and feeding the pipe to be operated upon, movable crimpers adapted to beadjusted relatively to said pipe and means for effecting the adjustment thereof, a compressor head and means for folding and flattening the crease when formed, of a main driving shaft and a counter shaft geared together for simultaneous continuous rotation, and two shafts, one of which has pivotal connections with said crimpers and the other connected with the compressor head and the means for folding and flattening the crease and both having an intermittentalternating rotation with means for effecting such intermittent alternating rotation and operating said shafts.

14. In a power driven machine for making stove pipe elbows, the combination with the IIO stationary front support means for holding and feeding the pipe to be operated upon, movable crimp ers and an adjustable face plate and connections between it and said crimpers, a compressor head and means for folding and flattening the crease when formed,-of a main driving shaft and acounter shaft geared together for simultaneous continuous rotation and two shaftsone of which has pivotal connections with said crimpers and the other connected with the compressor head and the means for folding and flattening the crease and both having an intermittent alternating rotation, with means for effecting such intermittent alternating rotationiand operating said shafts.

15. In a power driven machine for making stove pipe elbows, the combination with the stationary front support means for holding and feeding the pipe to be operated upon, and movable crimpers having pivotal connection with said support and exerting a rolling or traveling pressure upon such pipe in effecting the crease, a compressor head and means for folding and flattening the crease when formed, of a main driving shaft and a counter shaft geared together for simultaneous continuous rotation and two shafts one of which has pivotal connections with said crimpers and the other connected with the compressor head and the means for folding and flattening the crease and both having an intermittent alternating rotation with means forcffecting such intermittent alternating rotation and operating said shafts.

16. In a power driven machine for making stove pipe elbows, the combination with a stationary front support means for holding and feeding the pipe to be operated upon movable crimpers having sliding pivotal connections with said support, a compressor head and means for folding and flattening the crease when formed, of a main driving shaft and a counter shaft geared together for simultaneous continuous rotation, and two shafts one of which has pivotal connections with said crimpers and the other with the compressor head and the means for folding and flattening the crease and both having an intermittent alternating rotation, with means for eifecting such intermittent alternating rotation and operating said shafts.

17. In a powerdriven machine for making stove pipe elbows, the combination with a stationary slotted front support, means for holding and feeding the pipe to be operated upon, and movable crimpers having projections from their rear faces adapted to travel in the slots in said support, a compressor head and means for folding and flattening the crease, of a main driving shaft and a counter shaft geared together for simultaneous continuous rotation and two shafts one of which has pivotal connections with said crimpers and the other with the compressor head and the means for folding and flattening the crease, and both having an intermittent alternating rotation, with means for effecting such intermittent alternating rotation and operating said shafts.

18. In a power driven machine for making stove pipe elbows, the combination with a stationary front support having upper and lower pairs of slots respectively inclined for the greater part of their length outward and inward relatively to a central axis, means for holding and feeding the pipe to be operated upon,movable crimpers having projections from their rear faces adapted to travel in said slots, a compressor head and means for folding and flattening the crease,of a main driving shaft and a counter shaftgeared together for simultaneous continuous rotation and two shafts one of which has pivotal connections with said crimpers and the other with the compressor head and the means for folding and flattening the crease, and both having an intermittent alternating rotation, with means for effecting such intermittent alternating rotation and operating said shafts.

19. In a power driven machine for making stove pipe elbows, the combination with a stationary slotted front support, means for holding and feeding the pipe to be operated upon, a face plate formed in two side sections slotted to allow of adjustment and also to furnish guides for projections from a pair of movable 'crimpers, clamping bolts passing through said adjustment slots in both support and face plate sections, a compressor head and means for folding and flattening the crease, of a main driving shaft and a counter shaft geared together for simultaneous continuous rotation and two shafts one of which has pivotal connections with said crimpers and the other with the compressor head and the means for folding and flattening the crease, and both having an intermittent alternating rotation, with means for effecting such intermittent alternating rotation and operating said shafts.

20. In a power driven machine for making stove pipe elbows, the combination with crimping devices, a compressor head, means for folding and flattening the crease and mechanism for holding and feeding the pipe to be operated upon, of a main driving shaft and a counter shaft geared together for simultaneous continuous rotation and two shafts one of which has pivotal connections with said crimpcrs and the other with the compressor head and the means for folding and flattening the crease and both having an intermittent alternating rotation, with means for effecting such intermittent alternating rotation and operating said shafts, and an automatic cut off adapted to be operated by said feeding mechanism to stop the machine at thecompletion of each elbow as set forth.

21. In a power driven machine for making stove pipe elbows, the combination with the stationary framework and main front and rear standards or supports, the front one of which has an annular opening therein, of a fixed external cylinder, extending horizontally from the rear standard to and having its forward end of slightly less diameter than said opening, an internal cylinder adapted to slide in said external cylinder and have its forward end project into said annular opening and such end being closed by a head piece having an annular projection or flange of correspond ing diameter to that of the forward end of said external cylinder, a movable ring or compressor head hinged to the outer face of said head piece, a shaft concentric with said cylinders and extending through and having its bearings respectively in said head piece and the rear support, cams mounted 011 said shaft within the cylinders, means for rotating said shaft, and connections between said cams and the internal cylinder and compressor head whereby the latter will first be alone and then simultaneously with said internal cylinder as set forth.

Montreal, October 5, 1892.

ALFRED N. FAIRMAN. lVitnesses:

WILL P. llICFEAT, FRED. J. Scans.

IIO

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