US296477A - Assigjtoe of one-half to - Google Patents

Description

(No Model.) J. S, SMITH.

TILE MACHINE.

.N0,296,477. Patented A 'r'.s ;1s84.

WITNESSES UNITED STATES JOHN S. SMITH, OF JACKSON, MICHIGAN, ASSIGNOR OF ONE-HALF TO THEADORE G; BENNETT, OF SAME PLACE.

TILE-MACHINE.

$PECIPICATION forming part of Letters Patent No. 296,477, dated April 8, 1884.

Application filed November 30, 1883. (No model.)

To all whom it may concern:

Be it known that I, JOHN S. SMITH, of Jaclc son, in the county of Jackson and State of Michigan, have invented a new and useful Improvement in Tile-Machines, ofwhich the following is a specification.

My invention relates to the worm-conveyor employed in tile-machines for forcing the clay in a plastic condition through the die in which the tubes are formed. In such machines regularity in feed is indispensable to the proper producing of the pipe. .If one end of the spiral flange becomes broken, so that one thread operates more perfectly than the other,

expense of repairs may be avoided.

the consequence will be crooked and-badlyformed tubes. Thesespiral flanges are pref erably double, and it frequently happens from breaking or wear they lose their uniformity, and consequently fail to produce uniform work. The pressure being principally on the end of the flanges nearest the die, the wear there is greater than on the other end, and in all cases the wear is greater on the face of the flange toward the die than it is on the other. In cgnsequence, it is necessary at short intervals to replace the worm and put in a new shaft. erative mechanism most exposed to wear that my invention is intended.

It consists in forming the flanges in sections, of a half -revolution each, on semi-annular sleeves, which may he slid onto the shaft independently, and which, being alike, maybe reversed or interchanged as they become broken or worn, and so much of the delay and Some of these advantages have been attained by substituting for the solid shaft and spiral flange in common use a sectional tubular sleeve carrying the two spiral flanges with ahalf-revolution on each section, and attached by slipping onto the shaft, which, as well as the eye of the section, is square. My invention is an improvement on this plan in the following respects: First, the flanges of adjoining sections meet more closely and fit more neatly to one another, thereby avoiding waste of power second,the sections, instead of being circular, are semicircular, and are therefore more cheaply cast, not requiring a dry-sand core, and more conveniently adapted to casting on It is to facilitate this repair of the 0pa chill, which, being placed only mule lower half of the flask, does not interfere with the venting through the upper section; third, in case of breaking of one flange only it is not necessary to replace both flanges; and, finally, the halfsections can be removed and replaced without taking off the die-plate, it being only necessary to take off the conical core, which is hung on the reduced end of the shaft. The semicircular section can then be slid forward onto the reduced end A, and then taken out by swinging it part round, whereas for the removal of atubular section the die-plate must be removed, and wh e11 replaced by a new one the work of adjusting the annulus must be carefully performed, which is unnecessary in my construction, for the halfcircular section may he slid into place without disturbing either the shaft or the die-plate.

In the annexed drawings, making part of this specification, Figure 1 is an elevation of the outer end of the shaft. Fig. 2 is aview of one of the flange-sections detached, and Fig. 3 is a transverse section.

, The same letters are employed in all the figures in the designation of identical parts.

A is the shaft, which in machines of this i class is either placed under the pug-mill to receive the clay as it is tempered and force it through the die or else in a casing receiving the clay from a hopper and carrying it toward the die, through which it forces it.

B is the core of the die, hung on the end of the shaft A, reduced to receive it. Instead of casting the spiral flanges with the shaft, they are built up of sectional pieces, each forming a half of a sleeve, 0, surrounding the shaft, and having each one halfrevolution. of the flange cast with it and running from corner to corner, so that the sections are duplicates each of the others. These sections are each formed with a feather, C, along the inner edges,which is received in the grooves AS Aicut longitudinally in the outer end of the shaft. The worm is formed by sliding these sections in pairs onto the shaft, and confining them by the end of the truncated conical core B. If any of the flanges become broken or worn, the sections may be reversed or replaced by others less exposed, or, if useless, by new ones. Thus,with

little delay and at small expense, the flanged changeable sections 0 O, substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in the presence of two attesting wit- DGSSGS.

JOHN S. SMITH.

In presence of- J OSEPH H. 0013B, JNo. G. MUNDY.

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