Improvement in molding pottery-ware
US 38905 A
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Description (OCR text may contain errors)
UNITED STATES PATENT OFFICEo ROBERT J. MARCHER, OF NEW YORK, N. Y.
IMPROVEMENT IN MOLDING POTTERY-WARE.
Specification forming part of Letters Patent No. 38,905, dated June 16, 1863.
.To all whom it may concern.-
Be it known that l, ROBERT J. MARCHER, of the city, county, and State of New York, have invented a new and Improved Device for Molding Pottery-Ware 5 and I do hereby de- Clare that the following is a full, clear, and exact description of the same, reference being had to the accompanyin g'drawin gs, forming a part of this specification, in which- Figure l is a vertical central section of my invention, taken in the line .fr fr, Fig. 2 Fig. 2, a plan or top view of the same; Fig. 3, a section of a portion of the same, taken in the line y y, Fig. l; Fig. 4, a section ofthe same, taken in the line z z, Fig. 1; Fig. 5, a section of a disk molded by my invention.
Similar letters of reference indicate corresponding parts in the several figures.
This invention relates to a new and improved machine for molding elliptical disks of pottery-ware 5 and it consists in the employment or use of an upright eccentric lathe in connection with a yielding former, and also with a cam to operate said former when required.
The object of the invention is to obtain a device which will supersede the ordinary exclusive manual process of forming potteryware vessels of this kind by admitting of the desired work being performed far more eX- peditiously and in a more perfect manner.
To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.
A represents an upright shaft, the lower end of which is stopped in the lower part of a framing, B, and has a horizontal plate, C, attached to its upper end. On this plate C there are secured two parallel bars, a a, the
inner surfaces of which are grooved longitudi nally in dovetail form, as shown at b b in Fig. 3. The bars a a serve as guides for a slide, D, the edges of which are beveled to iit and slide freely in the grooves b I). -To the upper surface of the slide D there is secured an oval plate, F, and to the under side of said slide there are attached two pendants, c o, which project down at opposite sides of a circular projection, G, fixed permanently on the framing B, and in an eccentric position with the shaft A, as shown clearly in Fig. 1.
The parts above described form what is well known as the eccentric chuck or lathe, and
when the shaft A is rotated the plate F will, in consequence of the pendants c c acting against the eccentric G, slide the plate F laterally so that every point of its edge will work in contact with a fixed point. This eccentric chuck or lathe, being well known, does not require a more minute description.
H represents a horizontal bar, one end of which has an oblong slot, d, made in it, in which a projection, e, is fitted. This slot (l is of dovetail form as well as the projection e, in order that the bar may be retained on the projeetion, and the latter is shorter than the slot in order to admit of a certain degree of longitudinal play of bar H. (See Fig. l.) The projection eis secured to an upright, I, attached to the framing B, and the opposite end of the bar H rests in a slot, f, in the upper end of an upright, J, attached to the framing B. To the bar H there is attached a pendent plate, K, the lower edge of which is curved or formed to correspond to the inner surface of the dish to be molded. (See Fig. l.)
L is a mold which is secured on the plate F. This mold may be constructed of plasterof-paris, or any suitable cement or other substance, and its inner surface is made to correspond to the outer surface of the dish to be molded.
M is a pendant which is attached to the bar H, and has a spring, N, pressing against it, said spring being attached to the upright J, and c'iusin g the pendant M to bear against a cam, O, which is on the upper end of a shaft, P, in the framing B. This cam O gives a vibrating movement to the bar H and plate F, and the shaft P is rotated by means of gears Q from the shaft A. The cam O (represented in Figs. 1 and 2) is simply a fluted wheel, but the form may be varied or modified as required.
The operation is as follows: The shaft A is rotated by any convenient power, and the clay is placed in the mold L and is made to conform to the side thereof by means ofthe plate K, which may be termed a former.77 This former smooths theinner side of the clay, gives the same a luted form, owing to the vibrations communicated to it by means of the cam O and spring N. This iuted form is'shown inred in Fig. 5, which represents a section of a dish. Diches may be molded with a smooth inrerior by dispensing with the cam O. Vhen the dish is molded, it is removed from the mold, the bar H being turned upward, which is admitted in consequence of the projectione being attached to the upright I, by a single screw, dx, and the operation repeated for a succeeding operation. The mold, it will be seen, gives the form to the outer side of the dish, while the plate or former gives the form to the inner'side. I would remark that a series of molds are used, so that when one dish isformed, it, with its mold, may be placed in the dryingroom, and a fresh mold placed on the chuck or lathe for a succeeding operation. The molded dishes shrink in drying, so that they may be readily removed from themolds. The Work, it will be seen, can be rapidly done and in a perfeet manner, and will effect a great saving in labor, as these dishes are now molded by hand on the exterior of a molda comparatively slow process.
Aeccentric chuck or lathe, for the purpose speciiied.
3. The cam O and spring N, or its equivalent, arranged to operate in conjunction with the plate or former K, mold L, and eccentric chuck or lathe, for the purpose set forth.
RoBT. J. MARCHER.
Witnessess PETER VAN ANTWERP, (JHns. GoUnER.