US327546A - Mold for casting printers leads - Google Patents

Description

(No Model) H. C. HANSEN.

MoLD FOR CASTING PRINTERS LEADS.

2%. N rimdm WT y ' is carried out as t IINrTnn STATES PATENT Ormea.

HANS O. HANSEN, OF BOSTON, MASSACHUSETTS.

SPECIFICATION forming part of Letters Patent No. 327,546, dated October 6, 1885.

Application filed April 14, 1884. Serial No. 127,9l5. (No model.)

.To @ZZ whom, t 771/603/ concern:

Be it known that I, HANS O. HANSEN, a citizen of the United States, residing at Boston, in the county ot' Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Molds for Casting Printers Leads; and I do hereby declare that the same are fully described in the following specification, and illustrated in the accompanying drawings.

This invention relates to improvements in molds for casting printers leads, 83e., and it 'ollows, reference being had to the accompanying drawings, where- Figure l represents a side elevation of the improved molds, shown as supported in a suitable bracket. Fig. 2 represents a plan view. Fig. 3 represents a front view, seen from X in Fig. l. Fig. 4 represents a crosssection on the line A Bshown in Fig. 3. Fig. 5 represents a vertical section on the line C D shown in Fig. l; and Fig. 6 represents a side elevation of the middle mold7 shown as being detached from the side molds.

Similar letters refer to similar parts whereever they occur on the different parts of the drawings.

Heretofore printers7 leads have been cast in molds divided vertically in two equal parts, held together by means of a suitable clamping device during the act of casting the leads, 85e., and after the leads are cast and partially cooled the molds are separated and the leads removed from the molds, and in so doing it is usually necessary to use a pair of nippers to take hold of the upper end of the lead and pull` it out ofthe mold. This is objectionable and is one ofthe effectsthat I obviate by the use of my improved molds. Another objection to the ordinary molds for this purposeis that they are liable to cool too rapidly at their lower ends and thereby preventing the leads from being successfully cast. By the use of my improved molds the capacity for doing the work is materially increased, as will now be more fully shown and described.

My improved molds are made in three separate parts, viz: a central or middle one, c, and a pair of side molds, b b, as shown, the latter being supported in a suitable bracket or rest, c, of any of the usual forms, constructed in such a manner as to permit said side molds to be moved in a lateral direction to and from each other, and the central mold, a, held between them, and to be clamped firmly against opposite sides of said central or middle mold, a, during the process of casting the leads.

The expansive bracket or clamping-rest is preferably composed of a pair of forked arms, e, that are hinged at c to a stationary support, c. The forward ends of the forked arms c c are inserted in bearingpieces In* bt, secured to the outside of the side molds, b b, as shown. In this manner the side molds, b b, may be expanded from each other by swinging the forked arms c around the fulcrum c, so as to permit the center mold, a, to be removed. During the operation of casting the leads the center mold, a, is confined between the side molds, b Z, by means of a cam or lever, c3, (shown in Fig. 1,) or in any oth er well-known manner. Lugs c* are attached to one of the forked arms c, and the cam c3 is hinged in these lugs by means of a pin, c5, the other forked arm c being situated between this cam and the first-mentioned arm c. Operation of the cam forces the arms toward each other.

I wish to state that the expansive bracket or clamping-rest c forms no part of my present invention, as such a bracket is well known in the art, and I therefore do not wish to confine myself to the particular kind of bracket shown in Fig. l, as any ofthe ordinary kind maybe used with my improved molds. The interior face of each side mold b is made perfectly smooth and plain, without any grooves or re cesses, as shown in Figs. 4 and 5, except at the upper end, where each side mold b is made with a flaring mouth, b, to facilitate the molten metal being poured into the spaces between the side and central molds. The central mold, a, has on its opposite faces one or more vertical recessses, a a, each of the proper width and depth for the desired size lead that is to be cast. In the drawings two such recesses a a are shown on each face of the lcentral mold, a, but more or less may be used, according to circumstances. The central mold, a, terminates in its upper end as a dividing edge or wall, a, projecting a little above the upper ends of the side molds, b b, so as to prevent the metal poured in at the top of the molds from uniting at this place,

IOO

shown in Figs. l, 2, 4, and 6, such enlargementsserving as stops against the front edges of the side molds, b b. to enable the operator to place the central mold in its proper position corresponding to that of the side n'molds when the apparatus is to be used, and when in such position one of the projections d is made to rest on a projection, b, secured to the front edge of one of the side molds, b, as shown in Figs. l and 3. 1

d is a wooden handle attached to the outerY ends of the metaly bars d (l, for the operator to take hold ofv while manipulating the central mold, a.

I prefer to make the outside of the side molds, b b, tapering, as shown in Figs. 3 and 5, so as toretain a uniform and proper heat during the operation of casting the leads; but I do not wish to confine myself to this eX- act shape of said side molds.

Ihe upper end of each side mold b is pro# vided with a head or projection, b, of a suitable size and form. Such head may be cast in one piece with its respective side mold, or

riveted or otherwise secured to it, as may be desired, such projection being made for the purpose of increasing the mass of each side mold at or near its upper end, and thereby to distribute the desired heat more uniformly and to aid in cooling the leadsin arapid manner at such upper end after being cast in the molds.

In using my improved molds I proceed as follows: Ve will suppose that the molds are smoked on their insides, as usual, and heated to the desired temperature. I then insert the central mold, c, between the side molds, b b, and clamp them together in position, as shown in Figs. l, 2, 3, 4, and 5. I then pour the molten metal into the mouths b b, causing the recesses c c on opposite sides of the central mold, a, to be lled, the air and a small pora tion of the metal escaping through the bottom holes 0r grooves, a3 co3, as usual. As soon as the metal is sufficiently cooled, I release the side molds, b b, from contact with the central mold, a, and expand the former sufficiently to enable the central mold, a, and the leads cast in its recesses aato be readily disengaged from the side molds, and by taking hold of the handle d" I turn the central mold over,

first on one side and then on the other, and

shake out the leads from opposite sides of said cent-ral mold without the need of pulling them out by means of nippers or equivalent tools. As soon as the leads are disengaged, as above, from the recesses c a', in the central mold, a, I reinsert the latter in position between the side molds, bb, and clamp the three molds together, as at first, and continue to cast another set of leads, and so on.

It will be seen that with my invention I double or more than double the capacity of the molds for doing the work, and I dispense with the use of nippers or other tools for disengaging the leads from the molds, thus saving a great deal of unnecessary labor.

By the construction of the side molds, b b, with upper enlargements, b3 b3, as described, I am able to retain a uniform temperature of said molds, and thus prevent the casting of imperfect leads.

Having thus fully described the nature, construction, and operation of my invention, I wish to secure by Letters Patent, and claim- 1. In combination, the side molds, bb, and the central mold c, having one or more recesses, a', on its opposite faces, and a handle, d, secured to its front edge, as and for the purpose set forth.

2. In combination, the central mold, c, having one or more recesses, a a', on each side, and an upper dividing-edge, a, projecting above" the top of the side molds, with the side molds, b b, and the flaring mouths bl b' in their upper ends, substantially in a manner and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

HANS C. HANSEN.

Witnesses:

ALBAN ANDRN,

HENRY GHADBOURN.

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