US33623A - Improvement in machines for making fire-clay gas - Google Patents

Description

UNrTED STATES vPATENT EEIOE.

JONAS S. HEAErr AND SAMUEL ENGLISH, OE TROY, NEW YORK, ASSIGNORS To JONAS S. HEAETT AND JAMES OSTEANDER, OE SAME PLACE, AND JOSEPH EiDGwAY, OE SOUTH AMBOY, NEW JERSEY.

IMPROVEMENT IN MACHINES FOR MAKING EIRECLAY GAS:E II. `T )EITSI Specification forming part of Letters Patent No. 33,623, dated Octob'er 29, 186.1;

T0 all wtmn it 711/602/ concern,.-

Beit known that we, JONAS S. HEARTT and y SAMUEL ENGLISH, each of the city of Troy, in

the county of Rensselaer and State of New York, have jointly invented a certain new and useful Improved Machine for Making Fire-Clay Gas-Retorts, which invention we have assigned to JAMES OSTRANDEE, of the said city ot Troy, JONAS S. HEAR-TT aforesaid, and JOSEPH RIDGWAY, of South Amboy, in the county of Middlesex and State of New Jersey; and we do hereby declare that the following is a full and exact description of our said invention, reference being had to the annexed two sheets of drawings, in which the same letters of reference indicate like parts in all the figures, and the arrows therein point out the directions in which the parts are moved in use.

In the annexed drawings, Figures l and 2, Sheet I, are central vertical sections at right angles to each otherof one of ourimproved retortmachines, and Fig. 3 is a partial section of the same, showing a retort in the process of formation. Fig. 4, Sheet ll, is a view of the nnder side of the parts immediately above the line .e z in Fig. l, and Fig. 5 is a plan of the parts just below the line y y in Fig. l. Fig. 6 is an isometrical drawing of a retort made by the use of the machine shown by the aforesaid igures and Fig. 7 is an isometrical draw- -Iing of a case, within which the retort is nished by the machine.

Figs. 8 and 9 are central vertical sections at right angles to each other of a part of a retort-machine having some of the essential features of that shown byFigs. l and 2.

In our improved machine (shown by Figs. l, 2, 3, 4, 5, and 7 of the annexed drawings,) A is the fixed hollow outer die, and B the fixed core, between which two parts the plastic material X is forced in forming the retort, by means of a feed-screw C, turning in a cylinder D, the end portion of the space between the said core B and die A, Fig. 4, being of the same transverse form and size as a transverse section of the body w of the retort. The core B in Fig. 2 does not extend as far as the hollow die A and has an end plate e, and the end 'v ofthe retort is formed by forcing the clay or plastic material into, so as to iill the space between the end plate e and a movable plate F temporarily held at the end of the die A, substantially as shown by Fig. 2. The end plate e is separable from the core B, and is secured thereto during the formation of the end /U of the retort by ineans of the screwrod g, Fig. 1, or its equivalent, extended through the machine to its outside, so that a person attending the machine can thereby release the plate e from the core.

Between the core B and the greater part of its end plate e is a Space 71 which by means of a passage i, Fig. l, has communication with the open air or a sufficient Supply of air or other suitable fluid, sov that after having formed the end fu of the retort inthe manner above described and released the plate @from the core B and also liberated the support F,

then upon turning the screw C, so as to force the plastic material through the Space between the die A and core B, the end u of the retort, with the end plate e, will freely leave the core, and so that the atmospheric or fluid pressure on the inner and outer surfaces of the retort during its formation will continually be so nearly equal that the retort will not collapse or be crushed inward by the pressure of the atmosphere, while the body of the retort increases in length, and`oonsequently tends to produce a vacuum within itself.

The Supporting-platform F is made to recede from the die A as fast as the retort is produced by means of any suitable devices worked either by hand or automatically, as indicated by the annexed drawings. If the die A extended beyond the end of the core B, as shown in Fig. 2, during the formation of the body part 4w of the retort, the plastic material in such a case would be liable to be forced or directed inward by the projecting part of the die A, so as to thereby make the body of the retortdefective. To obviate that difficulty and also facilitate the formation of the flange j on the retort in thc manner hereinafter described without requiring either the whole core B or the end portion of the'd-ie A to be movable, we'make the core with a shell k, Figs. 1, 2, and 3, fitted and arranged so that the shell 7o can be slid longitudinally on the body Z of the core by means of the screw-rod hold the shell k with its end within the end of the outer die A, as shown in Fig. 2, to permit the formation of the end i; of the retort in the manner above described, and can also release the shell 7.o, so that it will ext-end any required uniform limited distance beyond the die A, as shown in Figs. 3 and l, during the formation of the body of the retort. W'hen the forming-retort becomes extended from the end of the die A, as shown in Fig. 3, a distance equal to the length of the completed retort, the revolving feed-screw C is stopped and the receding support F made stationary. Then to make the flange j on the retort, a divisible mold M, Fig. 7, open at both ends, and of substantially the same internal form and size as the outside of the finished retort, is placed around the partly-formed retort, as indicated by dotted lines in Fig. 3, the core B or its shell k being extended Within the partly-formed retort and opposite to the recess n in the mold M. Then the condensing` air-pump P, Fig. l, having communication with the interior of the retort by a suitable air-passage t', is worked so as to increase the fluid-pressure inside of the retort above the atmospheric pressure, and at the same time the screw C is turned so as to force theiplastic material into and solidly ll the recess n in the mold, and thus forni the flange j on the retort, as shown in Fig. 1. Then the mold and retort are together slightly withdrawn from the die A and the screw C stoppedvhereupon the retort is severed from the material within the die A and removed in and with the mold,

ythe shell lo being previously retracted within the die A. or the mold and retort drawn off together from the core to allow such removal. By thus having the core B extend opposite to the recess n in the mold while forming the flange j on the retort., as above described, the plastic material is prevented from being squeezed into the retort anywhere opposite to the flange, and the increased fluid-pressure made at the same time against the innersurface of the retort straightens and presses the body of the retort hard against the inner surface of the mold M, and thereby prevents the retort from being crimped down or bulged inward where not supported by the core B or its shell lo.

instead of the condensing air-pump P, any other suitable apparatus or means having proper communication with the interior of the .retort may be used for producing and maintaining a nid-pressure superior to that of the atmosphere on the inner surface of the retort during the iormation of its iiange j in the manner hereinbelore set forth, and the mold M, instead of being divisible, may be so made in one piece and set in the machine at the end of the die A, before beginning to form the retort, that the retort will as it is produced enter endwise into the mold, and,

as indicated by the annexed drawings, any suitable devices may be used to sustain, elevate, and lower the supporting-table F and the mold M in forming the retort; and instead of introducing the air or other fluid into the hollow core B and interior of the retort through the hollow spindle s of the feedscrew C, as shown at t' in Fig. l, or by a passage through the core-support O,as indicated by dotted lines at q in the same ligure, the air or its equivalent fluid may be conducted into the hollow core and retort by any other suitablyarranged passage, as indicated in Figs. 8 and 9, where the air is admitted through a hollow screwbolt r, extended through the table F, end plate e, and end o of the retort itself, and by the use of which screw-bolt the end plate e is in that case secured to and released from the core in forming the end of the retort in the manner hereinbefore described; but we generally prefer the arrangement of air-passage t' and endplate fastening g, (shown in Fig. l,) in which cafse the machine does not leave the retort with a hole through its end; and it is obvious that a piston in a cylinder, or other suitable means, may be employed instead of the screw .C and cylinder D to force the plastic material through the space between the dieA and core B in our improved machine.

Ve are aware that it is not new to combine or arrange together a hollow die A, core B, end plate F, cylinder D, and pressing-piston or feed-screw C for use in molding a fire-clay gas-retort with a closed end,but Without the iiange j around its mouth, examples being shown on pages 526 and 527, Vol. 2, Apple* tons Dictionary of Machines, tbc., New York, 1852, and we do not claim that combination, and we do not broadly claim the admission of air to the interior of a hollow article made with a closed end during its passage from the molding-maehine; but We do believe that it is new in machines for molding retorts to make the whole end c of the hollow core having communication with the open air freely and entirely removable from the core with and by the action of the end v of the retort as the retort begins to pass from the machine, the said end plate e being attached to and released from the core substantially as herein represented; and we are aware that it has been heretofore proposed to make the whole core in a machine for molding clay retorts fast to the pressing-piston thereof, so as to move with the piston; but that construction we neither claim nor use, and we do not broadly claim the application of a Huid-pressure greater than that of the atmosphere to the inner surface of hollow plastic articles during their formation within molds.

lVhat we claim as new and of our invention in the above-described machine for making gas-retorts from plastic materials, and desire to have secured by Letters Patent to the aforesaid JAMES OSTRANDER, J oNAs S HEARTT and JOSEPH RIDGWAY, as the assignees of all our right, title, and interest therein, 1s-

l. The removable plate e, when secured to and released from the end of the hollow core B, having communication with a Isupply of atmospheric air or other fiuid, as and for the purpose herein set forth.

2. The sliding core-shell la, when applied so that the core can be thereby made to terminate either Within or beyond the end of the outside die A, as herein described.

3. The combination of the condensing airpump l) or any equivalent therefor with the outer die A, mold M, end support F, core B, extended opposite to the recess nin the mold, and a device for forcing the plastic material between the said oore and die into the mold, substantially as and for the purpose herein set forth.

JONAS S. HEARTT. SAMUEL ENGLISH.

Witnesses:

DANIEL HUDSON, I AUSTIN F. PARK.

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