US571413A - James thomson - Google Patents

Description

(No Model.) V

J. & G. THOMSON. IRON PIPE PATTERN.

No; 571,413. Patented Nov. 17, 1896.

NITED STATES ATENT Prion.

JAMES THOMSON, OF HAMILTON, AND GEORGE THOMSON, OF DUNDAS,

CANADA.

PATTERN.

SPECIFICATION forming part of Letters Patent No. 571,413, dated November 17, 1896. Application filed December 23, 1895. fierial No. 573,046. (No model.)

To aZZ whom it puny concern:

Be it known that we, JAMES THOMSON, pipefounder, residing at the city of Hamilton, and GEORGE THOMSON, machinist, residing at the town of Dundas, in the county of Wentworth," in the Province of Ontario, Canada, both being British subjects, have invented certain new and useful Improvements in Iron-Pipe Patterns, being a device or apparatus to be attached to the ends of iron-pipe patterns for the purpose of insuring an absolutely true and eoncentricbead on iron pipes; and we do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to use the same.

l-Ieretofore the pattern for the portion of an iron pipe which is called the bead has been separate and detached from the pattern for the body of the pipe, and in order to obtain a mold for a pipe with its bead the pipe-pattern has been placed on top of the pattern for the bead and fastened there while the molding sand was rammed around the pattern. The pattern for the body of the pipe was then withdrawn from the mold and the mold lifted off the bead-pattern (which was on the ramming-stool) and transferred to the pouringseat. If the pipepa-ttern,which is cylindrical in shape, had a projecting end corresponding to the bead on the pipe, it would be impossible to withdraw the pattern from the mold without destroying the mold, as the diameter of the bead is greater than the diameter of the pipe immediately next to it. As a consequence of this method of molding pipes it frequently happens that the bead is not exactly coneentrio with the pipe, and the pipe has to be re jected on that account.

The object of ourinvention is to make the pattern for the bead an integral part of the pattern for the pipe and to secure a bead that must necessarily be exactly concentric with the pipe. We attain that obj eet by the 1nechanism illustrated in the accompanying drawings, in which Figures I and II are longitudinal sections of a pipe-pattern with the apparatus in question attached to the foot or lower end thereof. Fig. I at the right represents the pipe-pattern in position on the pouring-seat with the sand rammed about it, and at the left represents the pattern in the act of being withdrawn The essential feature of the invention eonsists of one or more metal slicks or slickers c e, hinged to a gearing d, which gearing revolves around an axis formed by the rod 6, running through the center of the pattern, the revolution of the gearing being produced by a rod and erankf and g, ending in a pinion 72 \Vhen the pattern rests on the pouring-seat, the slicks from the upward pressure of the pouring-seat take the position indicated at the right of Fig. I, and the outer ends of the slicks, which project beyond the line of the pattern, correspond in outline to the outline of the beadto be formed on the end of the pipe. WVhen the pattern is in this position, the sand I F is rammed in the ordinary way. The gearing, to which the slicks are attached is then made to revolve by turning the crankeontrolling the rod f, and thus the mold or matrix for the bead is formed in the sand. hen the pattern is withdrawn from the mold in the or dinary way and as it is raised from the pouring-seat, the outer ends of the slicks fall downward and inward by their own Weight, as shown at the left of Fig. I, and thus make no interference with the mold for the pipe.

In Fig. I the rod 6, running longitudinally through the center of the pattern,-is an ordinary rod of a pipe-pattern fastened to the head of the pattern by a block y and nut z, and said rod, nut, and block are no part of our invention,but are common to all pipe-patterns in ordinary use.

Fig. II shows the pinion at the end of the rodf, controlling the movement of the gearing d, to the under side of which the slicks are hinged.

In Fig. II the slicks are supposed to be in the position indicated at the left of Fig. I.

Fig. III is a similar view to Fig. II, except that the pattern is supposed to be resting on the pouring-seat, and the :slicks c c are in position to form the mold for the head, as represented at the right of Fig. I.

Fig. IV is a View of the under side of the gearing (Z, showing the form of the slicks adopted by usand the'method inwhichthey i when the pattern is resting on its end, project are hinged to the gearing.

It is manifest that it is immaterial how many slicks there may be, and that one slick would do the Work as well as two or more. If only one slick is used, the header will have to make one complete revolution to form the mold. If there were-severalslicks, a partial revolution of the header would be sufficient.

What we claim as ourinvention, and desire to secure by Letters Patent, is

A mechanical device to be attached to the foot-"or lower endof iron-pipe patternsto form a mold or 'matrix for the bead consisting of one,=two or more slicks or slickers c 0, each so connected by a hinge to the under side of a plate or gearing d d, revolving. around the axis of a pipe-pattern, that when the pattern is suspended perpendicularly, the slicks of their own weight fall to such a position, that their outermost pointis within the lines of the external surface of the pattern, but which beyond the line of the pattern, and can be made to revolve in that position by means of a crank g, rod f, and pinion h acting on the plate or gearing to which the slicks are hinged, such slicks being so shaped at their projecting ends, astoeXcavate-in the sand a mold or matrix flora pipe-beading; all substantially as above set forth.

JAS. THOMSON. 7 GEORGE THOMSON. Witnesses THos'H. ORERAR, JOHN I. STUART.

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