US1739037A - Fire rack for chinaware - Google Patents

Description

Dec. 10, 1929. w. B. LOUTHAN FIRE RACK FOR CHINAWARE Filed Dec. 13, 1928 W-BLoufiz an Patented Dec. 10, 1929 UNITED STATES r. on

WILLIAM B. LOUTHAN, OF EAST LIVERPOOL, OHIO, .ZltSEEIC-rNOR TO THE LOUTHAN MANIF- FAGTURING 00., OF EAST LIVERPOOL, OHIO, A CORPORATION" OF OHIO FIRE RACK FOR OHINAWARE Application filed. December 13, 1928.

This invention relates to saggars or fire racks used for supporting decorated china in the kiln. The tire racks or saggars com monly used are so constructed as to provide a base, upright rods or equivalent members and pins projecting inwardly from the upright rods upon which the glost or dec0- rated ware is supported for firing.

One of the objects of the present invention is to provide a rack having upright rods apertured for the reception of pins, triangular in cross section, the holes or recesses for the reception of the pins communicating with the outer face of the rod by means of small apertures, thus eliminating the danger of suclr ing in the process of molding the rack when the die is withdrawn as the air to replace the die enters through the hole in the back. Furthermore, provision of this aperture permits a common nail or other pointed article to be used. to eject a jammed pin.

A. further object is to provide means whereby the upright rods are held to the base. It is necessary that these rods should be held firmly to the base and yet be capable of being withdrawn therefrom.

My invention contemplates the provision of recesses in the base for the reception of the lower ends of the rods, these recesses being so formed that fine sand may be allowed to sift into the space between the rod and the base which wedges into the joint and holds the rod firmly, these recesses having lateral extensions constituting what may be termed sand reservoirs so that sand will flow more readily into the socket.

My invention is illustrated in the accompanying drawings Figure 1 is an elevation of the rack;

Figure 2 is a horizontal sectional view on the line 22 of Figure 1;

Figure 3 is a section on the line 2-2 of Figure 2;

Figure 4; is a section on the line 4-4 of Figure 2.

Referring to these drawings 10 designates a base of refractory material. This base is formed with the downwardly projecting bosses 11 as usual for supporting the base within the kiln. The upper face of the base Serial No. 3253124.

is formed with a plurality of sockets or recesses 12. There are three of these recesses illustrated, though, of course, I do not wish to be limited thereto. The base is shown as a tri-lobed but here again I do not wish to be limited to this.

Each of the recesses or sockets is formed at a plurality of points, as for instance three, with outwardly projecting triangular extensions 13 constituting sand reservoirs and sand outlets as will be later explained.

Disposed within the sockets 12 are the uprights or rods 141 which are also made of re fractory material, these rods being preferably square in cross section. Each of these rods at its upper end is engaged with a head 15, this head being preferably recessed to receive the rods so that the head may be detached. Each of these rods 14 is formed with an inwardly extending recess or socket 16 which is triangular in cross section. Each socket extends downward and outward into the rod and communicates with the outer surface of the rod by means of a small aperture 17. Eemovably disposed within these sockets 16 are the pins 18. These pins are triangular in cross section.

With a construction of the character described. the rods M are inserted in the base 10 and then dry sand is allowed to sift into the space between the rod and the base as illus trated in Figure 3. This wedges in the joint and holds the rod firmly in place. The V- shaped extensions 13 are a help in sifting the sand into the socket. This is done by inserting the rod into the base, then placing about one-half handful of dry sand around the rod. The rod is then moved slightly back and forth and the dry sand flows into the socket 13, wedging the rod 14c very tightly in place.

" die used in forming the rods is withdrawn as air to displace the die enters through the holes in the back of the stocket.

The sand joint which is illustrated in Figures 3 and l is aparticularly important feature of this rack. It will be understood that these racks are made of porcelain and to make a fit with porcelain sufiiciently close to hold the upright rods 14 rigid is next to impossible because porcelain shrinks when firing but does not shrink uniformly so that some of the rods will be too large and will not enter at all. Hence a loose fit is necessary and then the rods must be rigidly but detachably engaged with the base. The rods 77 are required to be fairly rigid on account of the vibration received in passing through a tunnel kiln. The rods should be detachable because if one part is broken it will not then be necessary to scrap the entire rack. In actual practice, the sand is very fine and will run out rapidly if the part is inverted and the rod oscillated a bit to loosen the packed sand.

I claim':'- I 1. A firing rack for china including a base, having sockets and rods insertible into said sockets, the sockets being sufliciently larger than the rods to permit sand to be sprinkled between the rod and the wall of the socket.

' 2. A firing rack for china including a base, having socket-s and rods insertible into said sockets, the sockets being sufliciently larger thanthe rods to permit sand to be sprinkled between the rod and the wall of the socket, the socket having lateral extensions open to the upper face of the base by which the sand may flow into the socket or be discharged When'the base is inverted.

In testimony whereof I hereunto aflix my signature. WILLIAM B. LOUTHAN.

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