US6243A - Improvement in type-casting machines - Google Patents

Description

UNITED STATES PATENT OFFICEo JOHN I. srUEGIs, OE NEW YORK, N. Y.

IMPROVEMENT IN TYPE-CASTING MACHINES.`

Specification forming part of Letters Patent No.6,2/13, dated March 27, 1849; antcdatcd September 27, 1848.

To all whom it may concern:

Be it known that I, JOHN I. SrURers, of the city, county, and State of New York, have invented a new and useful Improvement in Type- Casting Machines; and I do hereby declare the following to be a full description ofthe same.

The nature of myinvention consists in combining with the nipple of a type-casting machine a conical plug or piston valve, which plug-valve, by means of an arrangement of levers attached to the frameof the machine and connected with the plugstem and a cam on the driving-shaft,works within a chamberbox forming the back part of the nipple on the inside of the bath,

To describe more particularly my invention I will refer to the accompanying drawings.

v Figures 1, 2, 3, and 4 are several views of a type-casting machine having the matrix removed as immaterial to the showing of myinvention,the same letters, wherever they Occur, having reference to the same parts.

Letters A A, &c., are the bottom board or plate and frame of a type-casting machine; B B, Src., the type-metal batharranged between the parts of the frame, underneath which the furnace is placed for fusing the metal. In the bath is a well, C C, Src., into which a plunger, D D, works by means of a cam-wheel, E E, on the driving-shaft F, and the levers G and H, as connected together by the rod I, and the spiral spring J, underneath the lever G, for reacting the levers and plunger and ejecting the metal through the canal K and nipplevent t0 the matrix when the conical plug or piston valve L has been withdrawn from it. This conical plug or piston-valve is about one inch long, (though it may be made of any required form and size,) and is made to work inside the nipple-chamber formed within the metal bath by combining the chamberbox M with or against the inner side of the bath and the back end of the nipple N. At the lower side of the nipple-chamber is a passage-way or duct, K, leading to the well, and at the back of the chamber another passage-way for the stem of the conical plug to pass through and for the admission of the fused type-metal for charging the well. This opening is a little larger than the stem of the plug, but not as large as the head of the conical plug; therefore when the plug is drawn back from the vent Of the nipple, so as to allow the ejectment Of the metal from the well to the matrix, it forms a seat on ythe passageway and completely cuts off all ingress of metal to the chamber until the charge from the well has been expelled. To work this conical plug-valve L the stem of it extends beyond the chamber-box and connects to a pin, P, in the end of a lever, O. This lever is secured by a screw, R, (as a working center,)to the top ofthe frame of the machine, having its outer end connected (through a slot) to the upper end of a U `shaped lever, S, which is fastened to the side of the machine-frame by a screw, S, as a center or fulcrum, and by means of a cam, T, on the driving-shaft E, its lower end is raised or depressed by the revolving of the cam, so as to cause a vibratory motion of the upper end of the lever, and also of the end of the lever O, connected therewith, for the purpose of alternating the motion of the plug-valve within the nipple-chamber and cutting of the ingress and egress of the fused type-metal.

U is a spiral spring attached to the lower side of the lever S and the bottom or plate piece of the machine, for the purpose of reacting the lever after being raised by the cam T, for the purpose of drawing baci; theplug-valve from the vent of the nipple.

W is a support and guide-piece against the side of the machine for supporting the lever` S and guiding the lever G.

X is a crank on the end of the driving-shaft, and Y Y the driving-shaft supporters or rests.

The operation of these several parts, when the machine is putin motion, is that when the cam Edepresses the end of the lever G it acts on the end of the lever H, through the rod I, and causes that to be depressed also, and lifting at its opposite end the plunger D, while at the same time the cam T lifts the lower end ofthe lever S, throwing its upper end back, and the end of the lever O, connected therewith, correspondingly, to open the back passage-way of `the nipple-chamber for the ingress ofthe metal and to close the vent of the nipple. Vhen in this position the metal flows into the chamber and through the duct K to the well, at which time (when the well is charged) the cams have passed their highest points and the plug is drawn back from the nipple-vent by the action of the spiral spring U, and closes the i11- tion with the nipple and bath and well of a type-casting machine, substantially in the manner and for the purposes herein set forth.

2. In combination with the conical plug L, the arrangement of the levers O and S and cam T, substantially in the manner and for the purposes herein set forth.

JOHN I. S'IURGIS.

Witnesses:

CHARLEsL. BARRITT, JOHN HANDEL, Jr.

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