US249224A - Molding pulleys - Google Patents

Description

(NoModeL) 11.1111011111111 1. MOLDING PULLEYS.

No. 249,224. 4 Patented Nov. 8,1881.

w'of Fig. 1.

UNITED STATES PATENT OFFICE.

DAVID N. OODDING, OF BOSTON, MASSACHUSETTS.

' MOLDING PLlLL EYS.

SPECIFICATION forming part of Letters Patent No. 249,224, dated November 8, 1881.

Application filed May 12, 1881. (No model) To all whom 'it may concern:

Be it known that I, DAVID N. OODDING, of Boston, in the county of Suffolk and State of Massachusetts,haveinvented a newand useful Improvement in Molding Pulleys, of which the following is a specification.

My invention relates to a means of molding metal pulleys whereby, with one pattern and one set of arms, I am enabled to mold pulleys of any desirable width of face, different diameters only requiring different patterns and sets of arms.

Referring to the drawings, Figure 1 is a vertical section of a device embodying my invention. Fig. 2 is a plan or top view of the same. Fig. 3 represents the pulley-pattern. Fig. 4. is the center piece of the match. Fig. 5 is the arm-pattern. Fig. 6 is a section on the line :0

A is the match, of which E is the upper part or floor. Around the edge of the upper part of the match isa metal frame, D, made even with the surface E, as shown in Fig. 1. The frame D is provided with three holes, d d d one on one side and two on the otheras seen in Fig. 2, and a similar metal plate, D, is attached to the upper side of the nowel B, and provided with pins to fit in the holes 61 dd, for

the purpose of holding the match and nowel steadily in position. The cope is also to be provided with a similar metal plate on its upper side to fitjthe nowel and the match. More than three holes, with corresponding pins, may

be used, if necessary.

I) is the center part of the match, resting upon the bottom of the match. The upper surface of the center part, b, is flush-with the surface E of the match, and the lower portion is divided into four sections, as shown in section in Fig. 6, having the passages b b between each. These passages extend to near the top ofthe center piece, b, as seen in Fig. 4. At the center of the top is a hole, through which passes the top of a metal post or standard, 6, secured to the base of the match, as seen in Fig. l.

a. is the pulley-pattern consisting of a metal cylinder open atthe top, and having on the bottom four arms, f f, connecting with a central hub, in which is a hole, through which its under side fitting in holes in the center piece.

The pulley-pattern it rests upon a spool or block, f, fitting over the post c at the bottom of the match. The block f may be readily removed and replaced by one of greater or less height, as required. Instead of the block f, the pulley-pattern may be supported upon bars, or in any other way which will admit of its be ing adjusted to different heights. The pulleypattern a extends above the surface E of the match A and the top of center piece, b, to a height equal to one-half the width of the face of the pulley to be cast, so that by adjusting the height of the support f, or its equivalent, the pattern a will project to any required height above the surface E, thus enabling me with one pulley-pattern to mold a pnlley with ferent diameters.

put on and filled with sand and rammed as be. fore. The whole is then turned down and the patterns again drawn out. The two parts are then put together, thus completing the whole mold, all ready to receive the metal for casting. The arms of pattern 0, instead of being straight, as shown, may be curved.

The center I) of the match, instead of being slotted or recessed, as shown in Fig. 4, may be made solid, and the pulley-pattern a may be a 5 plain cylinder without the arms f and central hub, e, and in this case the central post, 6, is dispensed with, the pulley-pattern a being held in proper position by means of metal guides on the inside of the opening in the match, so as to maintain a perfectly fixed position While molding. The pulley-pattern is then supported upon strips of wood or other material extending across the bottom of the match to adjust the pattern to the required height above the floor E of the match.

What I claim as my invention is The combination of the match A, provided with-the floor E, and metal frame D, theremovable center piece, 12, means for centering the center piece, pulley-pattern a, arm-pattern c, and adjustable block f, or its equivalent, all arranged and constructed substantially as and for the purpose set forth.

In testimony whereofI have signed my name 15 to this specification in the presence of two subscribing witnesses.

DAVID N. ooDDnSIG.

Witnesses J os. H. ADAMS, B. OHARA.

Images