US903391A - Apparatus for dying molds. - Google Patents

Description

J. E. MATHBWSON.

APPARATUS FOR DRYING MOLDS.

APPLIOATION FILED Mum, 190a.

903,391. V Patented Nov. 10, 1908.

- WITENESSES: y ,5 INVENTOR fi A TTORNEY.

was uqmus PETERS cm, wnsmrvcram u a n rr s JEREMIAH E. MATHEWSON, OF BROADHEATH, ENGLAND, ASSIGNOR TO BENJAMIN O. TILGHMAN, JR, AND RICHARD TILGHMAN, OF PHILADELPHIA, PENNSYLVANIA.

APPARATUS FOR DRYING MOLDS.

Specification of Letters Patent.

Application filed March 1, 1906.

To all whom it may concern:

Be it known that I, JEREMIAH EUGENE MATHEWSON, a subject of the King of Great Britain and Ireland, residing in Broadheath, in the county of Chester, in the Kingdom of Great Britain, have invented a certain new and useful Improvement in Apparatus for Drying Molds, (for which I have obtained British Letters Patent No. 4,656 of 6th March, 1905,) and of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof.

M invention relates to the drying of molds and as for its object to provide suitable apparatus for passing air downwardly through a fire and if necessary to cool down or reduce the tem erature of the hot gases so produced before t ey enter the mold.

With this object in view my invention consists in the details of construction and manner of operation set forth in the following description and accompanying drawing in which like reference characters refer to corresponding parts.

In the drawing, A, is the body ortion of a cylindrical casing or outer shel supported upon the flat ring P by the legs B, B. The removable lid or top J, is hinged at f to the upper end of the casing and has an opening in the center thereof. Projecting upward from this opening is a conduit K, which is turned into an elbow 0 en to the atmosphere. Projecting downwardfy through the top of this elbow is the nozzle L, the said nozzle being connected up to a suitable apparatus (not shown) for storing or generating compressed air. Within the casing opposite the opening in the lid or plate is a baflfle plate M, supported by arms fastened to the interior of the casing. Below said baffle plate is a fire box corn risin a cylindrical metallic shell f, whic shell contains a magazine F, composed of ganister, fire brick, or other refractory material. Below this magazine is supported a hearth G, leaving an annular space between the lower end of the wall of the magazine, and the eripheral portion of the upper surface of tile hearth. Between the cylindrical shell f, and the casing A, is an annular space over the top of which extends the outwardly turned annular perforated flange H. Attached to the flange H, between any two of its perforations is a lug a, into which is screwed the handle 71. This handle extends through a horizontal slot in the casing, and attached to the said handle is aplate 6, over lap ing the edges of the slot on the interior of t e casing for the urpose of keeping the slot closed when the fiandle is moved. The annular perforated flange H of the shell rests upon another erforated annular flange N. The flange N, is bolted to the casing A, and supports the magazine F, together with its metallic shell f, by means of the outwardly turned flange H of the latter; thus forming a register which may be opened or closed to the passage of air therethrough. Around the annular opening between the lower edge of the magazine wall and the outward periphery of the hearth, is a cylindrical ring Q. The said ring extends above and below the said opening, and is supported by the arms 6, e,'connecting the hearth Gr with casing A. The said ring is held in a position about mid way between the shell of the magazine and the outer casing by the radial pins g, 9.

From an outlet in the bottom of the casing projects the pipe R which enters a flanged tube E, placed over the opening into the mold. The said pipe is shown projecting upwardly into the bottom of the casing A, thus forming a wall around the outlet to revent ashes that may have accumulate in the bottom of the casing from passing through the outlet. It is not necessary, however, that the said wall should be formed by projecting the pipe B into the casing, as the said wall may be formed se arately from said pipe and arranged aroun the outlet in any other manner, provided it prevents the ashes from entering the outlet. The arrangement of this tube or wall around the outlet, or so that the outlet will be within it, forms, together with the outer casing A, an ash chamber at the lower end of the casing. The entire a paratus including the flanged tube E, may be moved from one mold to another by the handles C, C, thusit has all the advantages of a portable structure. A door D is attached to the lower part of the casing which may be opened to obtain access to the lower end thereof when it is necessary to remove the ashes.

By turning on the cock 0, in the compressed air connection the said air issues in the form of a jet through the nozzle L, into the conduit K, thus forming, together with pass through the register opening around the said conduit, an injector for the drawing in of rings H and N, the two streams entering together from the annular space into the chamber below where they have time to mix completely before use. The hot gases are thus toned-down to the temperature required for drying purposes. The temperature of the mixture maybe re ulated by varying the proportion of the voIume of air permitted to top of the annular space, which may be entirely closed if necessary. The baflie plate M above the fire box effects a more perfect distribution of air before its division into the relatively hot and cold streams when the re isterH is open, and the cylindrical ba e ring Q directs the production of combustion into the chamber below the hearth. Fuel may be introduced into the magazine F, at the top thereof by 0 ening the top of lid J.

The herein descri ed apparatus is characterized, among other things, by the passing of the air downwardly through the fire'by virtue of which I obtain a heated element free from carbon and smoke because any carcarry off more or less quantities of carbon and smoke. These products, due to the ressure of air, create combustion and burn in the pipe leading to the mold. Theregulation of the temperature of the heated drying element being impossible under these conditions the o eration results in causing injury to the mo d unless great care is used. The need for a large connecting pipe from a blower is obviated in the present appara tus because the (qiuantity of compressed air necessary to pro uce the blast is comparatively small and thus can be delivered to the apparatus by a light flexible tube of small diameter and of any length. The connection of this tube with the a paratus may be made by means of any simple appliance with great facility and at the upper part, where it will be out of the way of the workmen. My apparatus will thus be available for use over a much larger area than the ordinary apparatus besides being much simpler in construction, much lighter and easier to operate.

While thedevice above described is portable, economical and eficient in its operation, I do not wish to confine myself to tl e V exact details thereof as the same may be materially modified and only illustrates one form of carrying out my invention.

Having now described myinvention what I desire to claim and secureby LettersPatent is 1. Anapparatus for drying molds consisting of a fire containing chamber, means for passing air downwardly through saidchamher. and means for directing the gaseous products of combustion into a mold. p 2. An apparatus for drying molds, consisting of a fire containing chamber, means for passing air downwardly through said cham.

ber and the air from the assage, and a conduit for directing the resu ting mixture into a mold. p *1 v 4; In an apparatus for drying molds, a cas ing, a fire containing chamber within said downwardly direction, the said casing having an air inlet at its upperend and an air outlet at its lower end, means for passing air through said casing both through and around volume of air passing around said fire box.

5. In an apparatus for drying molds a casing having an air inlet at its upper end and an air outlet at its lower'end, a fire box located within said casing, means for passing an downwardly through said casing both through and around said fire box and abafiie plate interposed between the openingin the upper end of the casing and the-upper end of the fire box.

6. In an apparatus for drying molds, a as ing having an open ended conduit projecting from its upper end, an air outlet at its lower end, a fire box through which air may be passed Within said casing, an outside passage for air between said fire box and the interior of said casing, a baffle plate interposed be tween the mouth of said conduit and the fire box, a compressed'air nozzle directed downwardly near the open end of said conduit and means for varying the area of the entrance of said outside passage. V v

7. In an apparatus for drying molds, a cas ing having an air inlet at its upper end and an 100 casing through which air may be passed in a 105 said fire box and means for regulating the i r air outlet at its lower end, a fire box located within said casing and having a lateral 0pening around its lower end, a baffle plate interposed between said opening and the said casing and means for passing air downwardly through said casing, both through and around said fire box.

8. In an apparatus for drying molds, a casing having an air inlet at its upper end and an air outlet at its lower end, an inwardly projecting wall surrounding the outlet to form in the bottom of the casing an annular ash chamber, a fire box located within the casing and means for passing air downwardly through said casing, both through and around said fire box.

9. An apparatus for drying molds, comprising a portable casing, a top fed, solid fuel furnace contained therein, means for passing air into said casing above said furnace, and a conduit leading from beneath the furnace for directing the products of combustion into the mold to be dried.

JEREMIAH E. MATI-IEWSON.

Witnesses D. STEWART, ARNOLD KATZ,

Images