MACHINES FOR FORMING SOCKETS ON CURVED EARTHENWARE PIPES.
The contrivances employed for forming sockets on curved earthenware pipes are also very ingenious, and in order to ex plain the machine used for this purpose it is necessary to state that ordinarily to form such sockets on sections of straight pipe, the outer die is prolonged beyond the point of discharge of such length and inside shape as to form the outside of the de sired socket. When, however, the pipe curves as it issues from the orifice, this device is impossible, as the issuing pipe en counters the edge of this socket-die and is destroyed. In or der to obviate this difficulty the socket-die is constructed separately from the other parts of the machine, in the form of a ring, divided into two parts, so as to permit of its being removed. By means of a lever this ring is firmly held in place until the socket is formed, when by a combination of arms and links the ring is opened automatically, and the socket having been formed, the curving of the pipe is proceeded with.
The machine shown in Figs. 139 to 145, is also the inven tion of Mr. Horace C. Camp, of Cuyahoga Falls, Ohio.
The invention has relation to that class of machinery for making pipes of clay, or other plastic material, by pressing it through annular orifice between an outside die and an inside core, and its object is to form sockets on the end of sections of such pipe when the pipe is caused to curve as it issues from the orifice.
In order to present the distinctive features of the invention it is proper to state that ordinarily to form such sockets on sec tions of straight pipe, the outer die is prolonged beyond the point of discharge of such length and inside shape as to form the outside of the desired socket. When, however, the pipe curves as it issues from the orifice, this device is impossible, as the issuing pipe encounters the edge of this socket- die and is destroyed. To obviate this difficulty, Camp constructs the socket-die separate from the other parts of the machine, in the form of a ring, divided into two parts, so as to permit of its being removed ; and the first part of this invention relates to the method of holding this severed ring firmly in place until the socket is formed, which consists in fitting its upper edge into a groove in the lower face of the outside die, and its lower edge into a groove in a flange projecting from the base of the die, which forms the inside of the socket; and the second part of the invention relates to a combination of arms and links for manipulating the parts of the ring.
For the purposes of this description, we adopt the following nomenclature : That part of the pipe-press which forms the outside of the annular orifice through which the pipe issues—the outside die.
The piece suspended centrally within this, and which forms the bore of the pipe—the core. The die which forms the in side of the socket—the lower die ; and the severed ring which is interposed between the outside die and the flange of the lower die, and forms the outside of the socket—the ring.
Figure 139 is a sectional view of a portion of the lower part of a pipe press, wherein A is the outside die, and B the core ; the outside die A having a groove S in its lower face to receive the upper edge of the ring.
Fig. 140 is a central section of the ring C, divided in half at a line a (a plan of which is shown in Fig. 145), and having its upper edge turned to accurately fit in the groove S, in the out side die A, and its lower edge fitted in the same manner for the groove R of the flange of the lower die D.
Fig. 141 is a side view of one of the hooks H.
Fig. 143 is a plan, and Fig. 142 a section of the line x x of the lower die D. Upon alternate sides of the flange of this die are two lugs d d, which lock into hooks H H attached to the outside die A, and hold the several parts together while the socket is formed.
In operation, the lower die D, by means of the collar E pro jecting from its base, rests upon a following rod (not shown), which moves in the line of the axis of the press. The ring C is then placed thereon, with its lower edge fitting into the groove R. The whole is then raised to the press, the upper part of the lower die D joining, and forming a continuation of the core B, and the ring C entering into the groove S. The lower die D is then revolved until the lugs d d lock into the hooks H FI, as shown in Fig. 144, the whole forming a com plete mould for the socket. When the socket is formed the lower die D is withdrawn, and the ring C separated and re moved.
To facilitate the manipulations of the ring C the inventor at taches to the segments thereof the arms L L' (see Figs. 144 and 145), hinged upon the wrist F attached to the bar P. Upon the wrist 0, journaled in the bar P, are fastened the lever G and link 111, and opposite ends of the link M are con nected with the arms L L' by the links N N', the whole so arranged that, by revolving the lever G, the arms L L' may be caused to diverge or approach each other, carrying the segments of the ring C.
The simple dividing ring C, for the purpose of making sockets on sections of straight pipe, is not new, but the method is new of holding it by means of the grooves in the dies A and D, and manipulating it by means of the arms L L' and at tachments.