US494257A - Orton c - Google Patents

Description

(No Model.) O. U. LITTLE.

PULLEY ABM PATTERN.

No. 494,257. Patented Mar. 28, 1893.

Tig. EL

Fig-9- UNITED STATES PATENT OFFICE.

ORTON C. LITTLE, OF MENASHA, WISCONSIN, ASSIGNOR OF ONE'HALF TO DUNCAN T. H. MAOKINNON, OF SAME PLACE.

PU LLEY-ARM PATTERN.

SPECIFICATION forming part of Letters Patent No. 494,257, dated March 28, 1893. Application filed uly 7, 1892. Serial No. 439,247. (No model.)

To all whom it may concern:

Be it known that I, ORTON O. LITTLE, a citizen of the United States, residing at Menasha, 1n the county of Winnebago and State of Wisconsin, have invented a new and useful Improvement in Pulley-Arm Patterns, of which the following is a specification.

My invention relates to a pulley arm pattern for use in molding pulleys and the obect of it is, to lessen the labor, and consequently the time employed in forming the mold into which melted metal is to be poured for the formation of said pulley.

Figure 1 is a plan view of my improved pulley arm pattern. Fig. 2 is an edge view of the arm pattern. Fig. 3 is a longitudinal sectlon of said arm upon the line a, a, of Fig. 2, having the several sections pulled apart in a longitudinal direction, and Fig. 4, a longitudinal section upon the line b, b, of Fig. 1 and having the sections pulled apart as they are shown to be in Fig. 3. Fig. 5 is a plan view of the hinges, or connection, which connects the several sections together. Fig. 6 is an edge View of said connecting device. Fig. 7 1s a plan view of the pulley arm pattern having a fillet mold upon its outer end. Fig. 8 is an end elevation of said fillet mold, and Fig. 9 is a vertical section of the larger portion of a molding flask, (the right hand side of it be- 1ng broken away,) showing a pulley hub mold,

a pulley rim pattern upon one side of said hub mold and my improved pulley arm pattern molded and in the process of being withdrawn from the mold through the hub mold, also showing the central arm pattern in the mold and the right hand one as having been molded and withdrawn from it. Figs. 1, 2, 3, 4, 7 and 8 are upon the same scale and Figs. 5 and 6 upon an enlarged scale with reference to each other.

Similar figures of reference indicate like parts in the several views.

1, 1', and 1", indicate the several sections of the pulley arm pattern; 2, 2, and 3, 3', pieces composing the hinges, or connecting devices for connecting the several sections together; 4, a fillet mold; 5, a portion of a molding flask; 5, molding sand therein; 6, a bracket arm; 7, one side of a pulley rim pattern in section; 8, a pulley hub mold; 9, pulley arm molds; 8, the cavity over the pulley hub mold for receiving the hub cope.

The pulley arm pattern I make, except for patterns where the entire arm is less than the diameter of the pulley hub, of several short sections, more or less in number according to the diameter of the pulley and, also according to the diameter of the pulley hub, in the present case three being shown, 1, 1' and 1, which number will usually be sufficient for pulleys of thirty inches or less in diameter, those above that size requiring more, and those under it a less number. The requirement governing the length of the arm pattern, or its several sections, being that they be short enough to be withdrawn from their mold through the hub mold. These sections are connected together by means of a loose jointed hinge, capable of being extended and contracted, and being composed of a slotted plate and alink, the plates 2 and 2' each having a slot, 2", into which a link, 3 or 3', is inserted. The slots, 2", are of sufficient length so that the link can move within it longitudinally of the plate. One of the plates being applied to one of the arm sec tions and a link to an adjoining section, the sections are permitted to be drawn away from each other so as to permit them to be arranged in position at right angles one with the other, as the pieces 1 and 1' are shown to be in Fig. 9. The arm sections 1' and l are each provided with a mortise, 1", for receiving the tenon, (consisting of the projecting end of the plates, 2 and 2,) so that the ends of the adjoining arm sections may come closely together and also so as to preserve said sections tern so that the plate can be grasped by the fingers of the molder, or a hook inserted into the hole, 2", for the purpose of drawing the pattern from the sand after the arm is molded. The plates are provided with screw holes and maybe secured to one half of the section pattern with screws, 2", and the links secured by turning up spurs, as 3", which spurs are to enter the wood of the pattern'and hold the link from being drawn out of the section to which it may be attached.

The two halves of each section of the arm pattern may be secured together with glue, nails or screws, as desired.

The link 3 is represented as being Welded or connected to the plate 2', but this manner of constructing said portion of the link and plate is not essential, as the link and plate may be each one independent of the other and be separately secured to their respective sections in any convenient and firm manner.

Any other device for connecting theseveral sections of the pattern to each other may be employed which willhold the sections straight while being molded and also permit them to be flexed, or arranged at approximately a right angle with each other, so as to allow the with-:

drawal of the pattern through the hub mold.

Fillet molds, 4, are provided, one of which is to be placed upon the outer end of each arm pattern in molding a pulley. lhese fillet molds are movable upon the outer end of the arm pattern and serve two purposes, one be produce a greater degree of strength at said point than without the fillet. These filletmolds I make of any good quality of core sand, or other material which is adapted for making cores.

The manner of using the pulley arm pat tern is as follows: A pulley rim pattern, 7, is placed within a flask, or if the pulley is quite large it may be placed in a suitable pit, and at a depth in said flask or pit for molding the desired width of pulley face. In this case it is shown as being suspended within the flask, 5, upon the bracket arm, 6, of which there should be in practice, three or more, for supporting the rim pattern until it is held in position by the molding sand being rammed in under it, when said arms are to be removed. The molding sand, 5, having been filled in, both inside and outside of the rim pattern to sufficient height for sustaining in position both the pulley rim and hub patterns, the hub pattern is then centered in position and more sand filled in until to a sufficient height for, The sev-. eral arm patterns are then arranged in posi-= receivingthe pulley arm patterns.

tion around the hub pattern, their inner ends being fitted to the circle of the hub, and placed in contact with it, and their outer ends being each provided with a fillet mold, 4, which fillet molds are placed against the interior of the rim pattern. Sand isnow filled in and rammed up, both inside and outside of the rim pattern, over said arms and around the hub pattern to the height necessary for the desired length of hub and width of pulley face. A cope should then be fitted upon the mold over the hub pattern in the space, 8', then taken off and the hub pattern withdrawn from its mold, then each of the pulley arm patterns can be withdrawn inward by the molder, turning the sections upward as they are drawn inward, and as they are shown in Fig. 9. The rim pattern may now be Withdrawn, a cope placed over both hub and rim mold, the necessary sprues and vents formed and the pulley cast in the usual and well known manner.

Having described my invention and the manner of using it, what I claim, and desire to secure by Letters Patent, is-

1. A pulley arm pattern, tapering from its inner to the outer end thereof, its inner end having a concave opening and an eye, or handle therein, and with-in the circle of the hub for which the pattern of the pulley arm is fitted, for allowing said pattern to be grasped by the molder and drawn inward into the hub mold, substantially as described.

2. The combination with a pulley arm pattern,taperin-g from .its inner to the outer end thereof, of a fillet .mold around said outer end, having one side thereof fitted to the inner circle of the pulley rim to be molded and the hole therein fitted for a longitudinal movement upon said outer end of the arm pattern, said hole being flaring from near its innerto the outer end thereof, and the fillet mold thereby adapted to form a fillet around the arm in casting a pulley, at the meeting point of the pulley arm and rim, substantially as described.

3. A pulley arm pattern divided transversely thereof into two, or more sections, said sections being connected together with a hinge joint, and means in said connecting joint for permitting the sections to be sepa rated, and for the sections to turn transversely of the pulley mold in a direction at nearly a right angle, one with the other, substantially as described.

4. A pulley arm pattern, tapering from its inner to the outer end thereof, and being divided transversely thereof, into two or more sections, said sections being connected together with a hinge, whereby the sections will turn transversely of the pulleymold and in a direction at nearly a right angle one with the other, and thereby to permit theseveral sections of said pattern to be drawn from their mold, through, and out of the hub mold, substantially as described.

5. A pulley arm pattern, divided transthe pulley mold, and in a direction at nearly versely thereof into two or more sections, said a right angle with the adjoining section, sub- 10 sections being connected together with a joint, stantially as described. consisting of a slotted plate and a link, the

5 link being movable in the slot of said plate ORTON LITTLE for permitting the sections to be separated, WVitnesses: and the plate being hinged to the link for J. E. SMITH, permitting its section to turn transversely of JOHN PAYNE.

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