US135880A - Improvement in stove-pipe-elbow machines - Google Patents

Description

. I 2Sheets--Sheet1. BECKMANN 81.1. GIBSON.v

Stove-Pipe Elbow-Machines. No, 135,880. l Patentedreb.1a,137s.

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' PatemdFb.18,18.73`.

nvenjpr To all whom fit may concern.: 1

yHamilton and Sta-te of Ohio, have invented 'certain Improvements in Stove-Pipe Elbows AThe rst part of our invention relates to an transversely from both 'side edges in such a "of'a machine'by means of which the elbow is JOHN BECKMANN AND JOHN GIBSON, OF CINCINNATI, OHIO.

IMPROVEMENT IN S-TOVE -PIPE-ELBOW MACHINES.

Specification forming part of Letters Patent No. l 35i-,580, dated February 18, 1873.

Beit known that we, JOHN BEOKMANN and JOHN GIBSON, of Cincinnati, in the county of and Machines for making thcsame, of which the following is a specification:

improved stove-pipe elbow made from a piece ofsheet metal, which-'has first had slits made manner that the surplus metal is taken up by lapping the cnt edges; the object of this part of'our invention being to enable a strong and durable elbow to be made by a cheap and simplemachine. `The second part of our invention'relates to the construction and opera-tion formed and made; 'all of which will be fully understood by reference to the following specification and drawing making a part of the saine, in which- Figure 1 is a vertical longitudinal section of a machine embodying 'our invention. Fig. 2 is a plan of the clamps of the same used to hold the metal. Fig. 3 is a plan of the hinged circular jaws of the same used to form the metal and to hold it during apart of the process.` Fig. 4. is a planl of the sides of a piece of sheet metal with a series of slits in each side edge, and with a jog in the metal between each slit to allow the lapped edges to tit closely. Fig. 5 represents a vertical longitudinal section of our manufactured elbow, and Fig. 6 is perspective View of our machine.

A A represent legs or posts upon which the machine is mounted;v B, the bed-plate of the machine; and C, a cylinder, around which the metal from which the elbow is to be formed is placed and held in position to be fed into the jaws. `l) isa bracket, to which the cylinder C is attached. C represents one side of the bracket extending back to rear end of the machine.` A similar one is on the opposite side, and their office is to strengthen and su pport the bracket D. E is a bracket with a circular opening loosely surrounding the cylinder C, and from the top of which projects an arm, F, upon which is mounted some of the operating mechanism. Gr is a projection on the cylinder C for forming the jog in the metal. S Srepresent hinged circular jaws for clamping the metal to cylinder C in front of the bead G, which forms `the offsets or jogs p in the metal; and K K circular clamps, which are opened and closed by'means of links N N and weighted lever y attached to the shanks of K K. this clamp K K is smaller than that of clamps S S. Q represents the front end of the cylinder- C, cylindrical,'but of smaller diameter and eccentric to the other portion' of C. When the piece of metal, slitted as shown in Fig. 4,/is formed into a hollow pipe the rear part of the two wedge-shaped pieces will be forced by the'jaws K K to iit the cylinder Q. M represents a movable press-block in size made to correspond with Vthat of the interior circumference of the elbow to be formed. It is mounted on rod W, and operated by abellcrank lever, I). R R represent a. circularhinged die or support for the metaloperated on by the roller t adapted tobe joined or locked together at the top, and having their interior .u

surfaces Haring tocorrespond with the curves of the elbow. M represents a stationary eccentric rigidly attached to M, and L a slotted crank carrying a friction-roller, t, which is made to travel in its desired path by rolling on and around the eccentric M, and as it travels presses the metal against the flaring surfaces of R It so tightly as to closely unite the slitted pieces of the elbow. X represents the pivot for the clamps K K and S S. Dies" l It It are also pivoted in a similar manner, and notches or gains are cut in the top part of clamps S S, so that they may be locked firmly together. The clampjaws do not come quite together at the top, but rest on the metal pressed onto the surface of cylinder Q. A die for forming rivetholes is made upon the top part of Q between the open ends of jaws 'K K' for the punch J to descend into to form a rivet-hole in the metal. J is a-set which descends to form a head upon the rivet, which is placed in a proper seat directly under it. These devices are used to rivet the lapped parts of the metal together, but, instead of riveting, the parts may be brought together by means of teats and recesses in the metal itself. The parts J J are operated by means of the parallel lever I I', the doublejointed links H H', and hand-lever T, to which the parts J J are attached, as shown. in Fig. 6.

OFFICE.

The circumference of The rivet set J is hinged to J so it may be turned out sidewise to prevent its being operated with J when desired. V is a scraper and rod for removing burrs, &c., from cylinder C. Vis a shaft passing through cylinder C, having the crankLrigidly attached to its end at the front of the machine, and a pulley, V, on its rear end for the purpose of transmitting motion and power.

The following is the operation of the machine in the construction of an elbow: A piece of sheet metal is slitted as represented by p, Fig. 4, and offsets or jogs p may be made in itat the same time. The metal is then rolled und riveted at one end, forming a pipe of the same diameter ot' the elbow, which is then put on the cylinder C 5 and the clamps S S being brought together the metal is pressed againstl the cylinder C and the lirst oifset formed, when the jaws SS are released and the pipe advanced a sufficient distance to form the next offset of the series in the same manner. The press-block M, which np to this time has been in its advance position, is brought back against the end of G by means of rod U and lever P, carrying with it the rst slitted piece on each side, depositing them over the metal now on Q. Clamps K K are then closed down and the now double pieces tightly pressed together, and, if desirable, into a secondary olfset, and there held until 1 iveted,'as before described. The metal is then advanced in the same manner as before, and these different operations repeated, while at the -same time crank L and roller t are put in motion to perform the office hereinbefore described for them. After the forming ot' each lap the clamps are loosened and the metal and block M advanced, and the several operations repeated until the desired number of laps are properly made and the elbow completed.

It is obvious that the distinctive features of the several parts can be variously modified, and yet retain the principal features of our invention, which consists chiefly in forming an elbow from a slitted sheet of metal by lapping one piece upon another and pressing them into the desired shape to form the curve of the elbow.

Having described our invention, what We claim as new, and desire to secure by Letters Patent, is-

l. The clamps S S, K K', and It R, pressblock M, operated substantially as described, in combination with cylinder G and proper supports therefor, whereby the metal is formed into an elbow ready to be riveted.

2. The slotted crank L, carrying roller t with mechanism causing it to travel around eccentric M', substantially as and for the purpose described.

3. The connecting mechanism composed of levers I I and T, links H H', punch J and set J', either or both, and proper supports for the whole, substantially as shownl and described. n

4. A stove -pipe elbow made from* sheet metal, slitted as shown and described, when the slitted pieces are formed and united substantially as set forth. t

5. An elbow-machine, consisting of the elements embodied by the first, second, and third claims, when constructed and arranged substantially as herein described.

-Signed at Cincinnati, Ohio, this 11th day of January, 1873. x.

JOHN BECKMAN N JOHN GIBSON.

Witnesses:

EDWARD lovn, E. E. Woon.

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