US154747A - Improvement in core-boxes and cores - Google Patents

Description

`the auxiliary core.

NrED .STATES rWILLIAM A.` OOGSWELL, OF ROCHESTER, NEW YORK, ASSIGNOR TO J UNIUS JUDsoN, or SAME PLACE.

Specification formingpart of Letters Patent No. 154,747, 'dated September 8, 1874; application filed l ,I December El, 1873.

OASE

To aZZ whom it may concern:

Be it known that I, WILLIAM A. GoGrsWELL, of the city of Rochester, in the county of Monroe and State of New York, have invented a certain new and useful Improvement in Core-Boxes and in the Construction of Cores; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same.

My invention consists of a core-box of peculiar construction for forming the cores used in casting the globular casings of steam `governor-valves, and also in a novel construction of cores, as hereinafter described.

In the drawings, Sheet 1 represents the core-box, and Sheet 2 the core. Figure l is a plan of the main box.' zFigs. 2 and 3 are lon gitudinal and cross-sections of the same. Fig. 4 is a plan of the auxiliary box. Fig. 5 is a cross-section of the same. Fig. 6 is an elevation of one-half` of the main core. Fig. 7 isa similar view of vthe auxiliary core. Figs. 8 and 9 are an elevation and cross-section, respectively, of the complete core.

This core is intended for casting 4the interior of -globular governor-valve casings, in which a jacket is 'used to allow the steam passing through the upper seat to return to the bottom of the casing, to unite with the current passing through the lower seat before entering thev steam-chest.l

B B are the counterparts or halves constituting the main core. The inner faces of these parts iit closely together, and the exterior is formed with a lcentral globe, h, which forms the enlarged globular space in the center of the shell. Above and below the globe are cylindrical projections Z fi, which form the openings in the upper and lower ends of the shell. A central opening, k, is made in one side ofthe globe, which extends inward halfway, more or less, thus 4leavin g the closed portion of the globe of about an equal extent in cross section. Half-sockets Z Z are formed in the inner faces of-the counterparts, above and below the opening k, to receive the prints of C C are the counterparts or halves of the auxiliary core. Their at inner surfaces also t together; and the outer surface consists of a cylindrical projection, m, which forms the inlet-pipe of the casing 5 a body, fn', with a circular projecting rim, n1, at the rear, and offsets n2 n2 at the sides, which form the interior shell and jacket of the casing; hubs or projections pp, which form the openings of the seats in the casing; and coreprints r r, which rest in the halfsockets Z Z of the main core.

The construction is such that when the cores are litted together and placed in the mold the molten iron poured in the latter will flow into the space s, Fig. 9, and form the jacket of the casing, and also into the spaces t t, above and below the body of the auxiliary core, and form the webs which contain the valve-seats.

The counterparts of the main core are both formed in a single core-box, D, having a chan geable center-piece, E. The depression in the box is of the same outline as the half-core e, being the globular portion, and j j the cylindrical end portions. The center -piece E is changeable from one side to the other by means of arms q q attached thereto, and fitting in mortises e c on opposite sides. The top of the box and of the center-piece is plane, to allow smoothing off. The front and under side of the center-piece is provided with a segment-face, w, whose diameter is as much less than the diameter of the depression e as the thickness of the side of the globe h of the core which it forms. In the rear of this segment is an oi'set, u, which projects downward to the bottom of the cavity, and in the rear of this is a circular bearing, which iills the whole rear of the cavity. On each side of the center-piece are prints y y.

The operation is as follows: The centerpiece being fitted in place, the sand is lled into the depression, and around the centerpiece. The space between the segment w and the front of the cavity e forms the thickness h. The bearing forms the opening k, and the prints y y form the half-sockets Z Z of the core. vThe sweeping 0E of the sand level with the top of the box forms the at inner sur- PATENT OFFICE.

face of the core. To form the opposite counterpart, B, the center-piece is simply shifted to the opposite position, as before described.

The counterparts of the auxiliary core are both formed in a single box, Gr, as shown in Figs. 4 and 5. This box is a counterpart of the haltcore before described, consisting of cavities b cf a, corresponding with the stem m, body nJ nl n2, projections p p, and prints 1' 1.

The main core-box may bel adapted to form cores for valves having the steam pass hori' zontally, by forming right-angled cavitiespon opposite sides of the globular center, for an extension of the core. rEhe center-piece E will cut of one of these cavities when not in use.

What I claim as new is- 1. The combination, with the box I), of the center-piece E, provided with the segment w and bearing w, and made changeable in position trom one side to the other, for forming the counterparts B B of the main core, as shown and described.

2. Acore for casting the interior of valvecasings, consisting of the main counterparts Witnesses.

WM. A. COGSWELL. .h Witnesses:

RJ?. Oscoop, E. B. Soo'rcr.

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