US354422A - Bullet-mold - Google Patents

Description

Patented. Dec. 14, 1886.

f m m h w x 9 V fl 4 E i w if 0 u 1 a .4 l z w 4 I 2 a W//--\-\\ mwv\\\\\\w f (No Model.)

BULLET MOLD.

wy fl UNITED STATES PATENT OFFICE.

AMORY JEWETT, or SOMERVILLE, MASSACHUSETTS.

BULLET-MOLD.

SPECIFICATION forming part of Letters Patent No. 354,422, dated December 14, 1886. Application fi led October nfisss. Serial Nasmssi. (No model.)

.To all whom it may concern.-

Be it known that I, AMORYJEWETT, a citizen of the United States, and a resident of Somerville, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Bullet-Molds, of which the following, taken in connection with the accompanying drawings, is a specification.

This invention relates to improvements in bullet-molds for the purpose of making cast lead bullets having circumferential grooves and central rear or base recess; and the invention is carried out as follows, reference being had to the accompanying drawings, where Figure 1 represents an interior view of the self-centering back plate, with its projection for making the rear central recess in the bullet whcn cast in the molds. Fig. 2 represents a central longitudinal section of said self-centering back plate. Fig. 3 represents a central longitudinal section of the bullet made by my improved molds. Fig. 4 represents a rear view of said bullet. Fig. 5 represents a front ele vation of my improved bullet-molds, showing the perforated cutterplate as removed. Fig. 6 represents a central longitudinal section on the line X X, shown in Fig. 5, and Fig. 7 represents a cross-section on the line Y Y, also shown in Fig. 5.

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

O in Figs. 3and 4 represents the form of bullet that I produce by my improved molds, such bullet having the circumferential grooves c c c and central rear recess, 0', as shown in said Figs. 3 and 4.. To castsueh a bullet, and at one and the same operation produce on it said circumferential grooves and central rear recess, is the object of my invention, for which purpose I make my improved bullet-molds as follows:

B B are the molds, open from end to end, each one having a cavity, b, equal to one-half of the bullet to be cast, and semicircular ribs or projections b b b, for producing the circumferential grooves c c c on the bullet. The molds B B are pivoted together by means of a bolt or rivet, Z, (shown in Figs. 5 and 6,) and provided with the respective handles D D, as is common in bullet-molds.

A is the self-centering back plate, located at ing in size and shape to the desired recess or cavity, 0, to be given to the rear end or base of the bullet C. The curved or inclined slots (1. a are of such alength as to cause the insides of the screws 6 e to bear against the inner termini of said slots when the molds B B are closed, as

shown in Fig. 7, by which arrangement the plate A is held in such a position relative to the closed molds B B as to cause the projection or core a to be centrally in a line with the bullct-cavity in the molds B B, and when the molds B B are expanded to their extreme limit the screws 0 a serve as stops against the outer termini of the slots a a, to prevent the molds from being opened farther than is necessary for the removal of the cast bullet.

At f on one of the molds B is pivoted to the front end of the latter the shear or cutter plate f, as is common in bullet-molds, such cutter-plate having a conoidal perforation, f, (shown in Figs. 6 and 7, that is placed centrally in a line with the mold-cavity in the molds B B when the bullet is to be cast. The

molten metal is then poured into the moldcavity through the perforation f.

In using my improved molds I proceed as follows: The molds B B are closed, as shown in Fig. 5, causing the core or projection to on plate a to be centered relative to the moldcavity in molds B B, as described. I then swing the plate f around its pivot f, so that its hole f coincides with the forward end of the mold-cavity in molds B B, after which I pour the molten metal through hole f into the moldcavity in the molds B B, causing the bullet to be shaped with circumferential grooves c c c and rear or base cavity, 0, as shown in Fig. 3. By swinging the cutter-plate f to one side the surplus ingot metal at the forward end of the bullet is sheared off, after which the molds B B are opened as far as the slots at a in plate A will allow, and the now finished bullet is dropped out of the molds and a new one cast as described, in combination with the se1f-cenin the same manner, and so on. tering back plate, A, having core or projec- What I wish to secure by Letters Patent, tion a for the formation of the rear cavity in 1 and claim, is the base of the bullet, as set forth. 5 1. The expansive molds B B, pivoted to- In testimonywhereoflhave signed my name gether and having connected to their rear ends to this specification, in the presence of two subthe plate A, having the core or projection 11 scribing witnesses, on this 9th day of October, on its inside for the purpose of forming a cav- A. D. 1886.

ity or recess in the base of the bullet, as set AM ORY JEWVETT. 1o forth. Vitnesses:

2. The expansive bullet-molds B B, having ALBAN ANDRI JN, mold-cavities b b and semicircular ribs 2) b b, HENRY OHADBOURN.

Images