US368956A

US368956A - merrill

Info

Publication number: US368956A
Authority: US
Publication date: 1887-08-30
Anticipated expiration: 1904-08-30

Description

(NoM0 de1.)

H. E. MERRILL.

v 1 PRESS FOR EARTHENWARE VESSELS." No. 368,956. Patented Aug". 30, 1887.

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UNITED STATES- PATENT OFFICE.

HENRY .E. MERRILL, OF AKRON, OHIO, ASSIGNOR TO THE E. H. MERRILL COMPANY, OF SAME PLACE.

PRESS FOR EARTHENWARE VESSELS.

SPECIFICATION forming part of Letters Patent No. 368.956, dated August 30, 1887.

' Application filed May 13, 1887. Serial No. 238,093. (No model.)

To 0022 whom, it may concern:

1 3e it known that I, HENRY E. MERRILL, a c1t1zen of the United States, and a resident of v the city of Akron, in the county of Summit and State of Ohio, have invented new and useful Improvements in Presses for Earthenware Vessels, of which the following is a specification.

My invention has relation to improvements in that class of presses for earthenware vessels in which the crock is formed by first forcing the tempered clay through an annular orifice between an outer case and inner mandrel on a bottom of similar material held against the annular orifice until the parts unite by a movable plate, and then releasing the plate and forcing the clay through the annular orifice to the desired length and cuttingit off.

In operation difficulty is found in separat- 2o ing the crock-bottom in its plastic state from the mandrel-bottom. To obviate this various devices have been adopted, as downwardopening valves, shown in the patent to M. J. Housel,No. 197 ,853,and a loose base having a downward motion, shown in patent to W. E. Dempsey and myself, No. 310,705, neither of which has been effective. in all cases. This difliculty is especially noticeable where the crosssection is large, and where it is other than circular, as in square or other polygonal forms.

The object of my invention is to overcome this difficulty.

It consists in the devices illustrated in the accompanying drawings, as hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a central vertical section of a press embodying my invention, and Fig. 2 an inverted plan of the mandrel.

The clay-cylinder A, in which is the piston B, moved by the rods 0 O, has a lower head, D, which forms the outer case of the annular orifice, and in this instance is adapted to the construction of square crooks with round corners. Centrally within this case isthe hollow mandrel E, suspended from asupport, F,

consisting of a rim and a hub connected by radial arms.

In the base of the mandrel E is an annular channel between its outer edge and center, in which fits a ring, G, the outer face of which is flush with the base of the mandrel. The ring G is attached by rods 9 to a number of radial arms projecting from a hub, H, inside of the mandrel. This hub is keyed to a shaft, J, which passes upward through the support F and piston B, and is pivoted to one end of the lever I.

Below the point of discharge and concentric with it is a plate, K, with a raised rim attached to the rod L, by which it is raised to and lowered from the press, and is arranged by devices (not shown) to be locked against the head D.

In operation the cylinder A is charged with plastic clay. A mass of the same material suflicient to form the crock-bottom is placed on the plate K, which is raised and locked against the head D. Pressure is then applied to the clay in the cylinder until it unites with the mass on the plate K, when the latter is released and descends as the clay is forced through the annular orifice until the proper length of crock is reached. Simultaneously with the release of the plate K the ring G is released and thrown downward, thereby pushing the crock -bottom from the base of the mandrel, and allowing air to enter around the rods g.

I do not confine my invention to the exact mechanical details here shown, as the mandrel may be suspended by a hollow shaft from the upper cylinder head, as shown in the patents before cited. The shaft J may .be hollow to supply air to the insideof the mandrel. The edges of the ring G may be beveled and other modifications made, as the necessities of each case may require or as experience may dictate.

I claim- 1. In a press for earthenware vessels, the combination, with a mandrel having an annular channel in its base, of a ring which fits in said channel,and is provided with devices, such substantially as shown, by which it is forced from and drawn into said channel, sub- 7 stantially as shown, and for the purpose speci- 2. The combination, with the mandrel E, having an annular channel in its base, of the ring G, supported by the rods 57 from the arms of the hub H, the rod J, and lever I, all