US273095A - Eobeet m - Google Patents

Description

(No Model.)

R. M. JOHNSON.

. 00m: Box.

. Patented Feb.27,1883.

WITNESSES:

UNITED STATES PATENT OFFICE.

ROBERT M. JOHNSON, OF HAINESPORT, NEY'V. JERSEY.

ooRE-Box.

SPECIFICATION forming part of Letters Patent No. 273,095, dated February 27, 1883.

Application filed November 22, 1882. (No model.)

To all whom it may concern Be it known that I, ROBERT M. JOHNSON, a citizen of the United States, residingat Hainesport,iu the county of Burlington, State of New Jersey, have invented a new and useful Improvement in Gore-Boxes, which improvement is fully set forth in the following specification and accompanying drawings, in which- Figure l is a top or plan view of the drag and spindle of the core-box embodying my invention. Fig. 2 is a longitudinal vertical section of the drag and cope in line 00 :20, Fig. 1, with the end supports employed. Fig. 3 is a transverse section in line y y, Fig. 2. Fig. 4: is an end view, partly broken away.

Similar letters of reference indicate corresponding parts in the several figures.

My invention relates to improvements in core-boxes; and it consists partly in providing a core-box formed of wood with a sheetmetallinin g, whereby it is rendered more durable and adapted to produce smooth and more uniform cores, and the box is not liableto be cut or injured on its inner face.

It also consists in providing a core-box with shoulder-pieces, as hereinafter set forth.

It also consists in constructing the core-spindle of detachable parts, which are connected together substantially as hereinafter set forth.

Referring to the drawings, A represents the drag, and B the cope, of the core-box, both formedlof wood. On. the inner face of each part A B is a depression, a, corresponding to one-half of the diameter of a core for making pipe, a deeper depression, b, corresponding to one-half of the diameter of the portion of the core for the bell of the pipe, and a somewhat similar depression, 0, corresponding to onehalf of the diameter of the portion of the core for a branch of said pipe. The face of each depression is lined with sheet metal, as at a, and at the place of junction of the depressions c b is secured a semi-cylindrical piece, 0, of cast or wroughtiron, and at the place of junction of the depressions a c is secured a semicylindrical piece, D, of cast or wrought iron, the face of each piece being fiush with the depression c, thus forming the shoulder of the core at the junction of the main length of the pipe with the bell and branch, respectively.

E represents the spindle, which is formed of a tube, 0?, for the core of the main length and bell'of the pipe, and a tube, 0, connected angularly with said tube d, for the core of the branch, the walls of the spindle being perforated. The spindle is placed on the drag and the cope fitted in position thereover, the cope and drag thenbeing latched or otherwise secured together. The ends of the tube (1 are now supported by cylindrical blocks F, preferably of sectional form, introduced into opposite ends of the box through the openings formed by the depressions a b. The box is then turned, placing the branch portion upright, and sand rammed around the tube 6 and turned on one end-say the one shown on theleft hand of the drawings-and rested on the flanges of the blocks F, said flanges also preventing loss of sand at the bottom. The opposite or upper block is removed and sand rammed in the opening formed by the depressions b, around the tube d, joining the sand at the middle of saidtube. The box is carefully inverted, and the block heretofore below and now above is removed, thus uncovering the openingformed by the depressions a, and sand is then rammed into said opening around the remaining portion of the tube d, the sand joining that previously rammed around the tube. The drag and cope are now unfastened and the cope is removed, whereby the core as formed is exposed and may be withdrawn from the drag.

It will be seen that in ramming the sand the lining a is notinj ured by such operation, whereby the faees of the depressions are not out or defaced, thus tending to increase the durability of the box and producing smooth and uniform cores. The pieces 0 D form sharp and well-defined shoulders for the respective parts of the cores, it being evident that said pieces can be properly shaped for their respective purposes and conveniently applied in position at places where the linings a, if employed, would be impracticable, said linings terminating when they reach said pieces. j

The tubes or'parts d e of the spindle are connected as follows: The walls of the opening of the tube d, into which the end of the middle portion of the tube d. The box is next tube 0 is fitted, are contracted,formingathroat, I broken, said tubes may be readily drawn from 20 f, on the back of which Walls abuts the head G of a rod, H, said head being of-T shape, and said rod passing through the tube 6, and

has its outer end threaded for the engagement of a nut, J, which tightens against a bearingpiece, K, in which is an opening for the passage of the rod H,and which rests against the outer end of the tube 0.

It will be seen that when the head G extends at a right angle to the throat fand the nut J is tightened the tubes d e are pressed firmly together and securely connected as one. After the core is formed and the casting accomplished the nut J is unscrewed and the rod H rotated a half-turn, whereby the head G is disconnected from the tube (1 and passes through the throatf, the two tubes (1 0 thus being separated, and as the said covering may be readily the casting.

Having thus described my invention, What I claim as new, and desire to secure by Letters Patent, is-- '1. A core-box formed of wood, havinga sheetrnetal lining, substantially as and for the purpose set forth.

2. A core-box having linings and shoulderpieces, substantially as and for the purpose set forth.

3. The core-box spindle formed of parts united by a rod or bolt and a nut, said rod or bolt having a T-head, substantially as and for the purpose set forth.

ROBERT M. JOHNSON.

Vitnesses:

JOHN A. WIEDERSHEIM, A. P. GRANT.

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