US1289976A - Drying-stove. - Google Patents

Description

R. H. WAINFORD.

DRYING STOVE.

I APPLICATION FILED SEPT-4.1917. 1,289,976.

Patented Dec. 31, 1918.

3 SHEETS-SHE INVE/VTUR APPLICATION FILED SEPT. 4.1917- R. H. WAINFORD.

DRYING STOVE.

Patented Dec. 31,1918.

1,289,976.- I a SHEETS-SHEET 2.

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LL! I I I I I I I l I I I lfi o [70 Lo 0 [if H B WZW- OR/VEY R. H. WAINFORD.

DRYING STOVE.

APPLICATION FILED SEPT. 4. 1911.

' Patented Dec. 31, 1918.

'3 SHEETS-SHEET 3- s m. S 314 E I Z v m/vE/vrm RICHARD HANBURY WAINFORD, OF STOKE-UPON-TRENT, ENGLAND.

DRYING-STOVE.-

Specification of Letters Patent.

Patented Dec. 31, 1918'.

Application filed September 4, 1917. Serial No. 189,542.

To all whom it may concern:

Be it known that I, RICHARD HANBURY WAINFORma subject of the United Kingdom of Great Britain and Ireland, residing at Stoke-upon-Trent, county of Stafford, Eng land, have invented a certain new and useful Improvement in Drying-Stoves, of which the following is a pecification.

My improvement relates to drying-stoves for pottery ware and has for its object the production of a compact, eificient drying apparatus capable of simultaneously drying considerable quantities of ware in process of manufacture and inducing an improved sanitary condition of the room in which it is installed and operating.

In the accompanying drawings, forming a part of this specification, Figure 1 is a diagrammatic vertical mid-sectional view of my invention; Fig. 2 is a diagrammatic vertical crosssectional view of the same, taken on the line ww in Fig. 1, looking from left to right; Fig. 3 is a diagrammatic top view of the same, taken on the line 3 in Fig. 1; Fig. 4 is an end view of a grou of the wareboards and a section of sproc et chain and the device connecting said group; of boards with said sprocket chain; Fig. 5 is a side elevation of the device shown in Fig. 4; Fig. 6 in an enlarged end elevation of the group of ware boards shown in Fig. 4 and the yoke by which they are suspended from the sprocket chain; Fig. 7 is a side elevation of the construction shown in Fig. 6, drawn to similar scale and disclosing in detail the connection thereof with a link of the sprocket chain;'Fig. 8-is a plan view of a portion of the construction shown in Fig. 6 and Fig. 9

is a horizontal sectional view of the yoke connecting a group of the ware-boards with the sprocket chain.

My apparatus is inclosed in a casing 1, made preferably of wood, and having transverse openings 2, 3 on its opposite sides, which may be closed by slides 1, 5, respectively. The top and sides of the casing 1 are preferably formed of two walls having an air space 6 between them, as indicated in Figs. 2 and 3. On the outside of. the casing 1 and at the lower edges of the openings 2, 3, are placed outwardly-extending shelves 7, 8 to receive the ware before being placed in and after being withdrawn from the stove. lVithin the stove are fixed sprocket wheels 9, 10.

All of the upper sprocket wheels 9 are arranged to turn upon pintles 11 firmly fixed to the side walls of the casing 1. The lower pairs of sprocket wheels 10 are fixed upon axles 12 (see Fig. 2) journaled in the side walls of the casing; and one pair of said sprocket wheels 10 next to one of the sides of the stove are fixed upon an axle 12 which extends through the wall of the casing and has mounted upon its outer end the worm-gear 13 which is actuated by the worm 14 driven by any suitable motor. Two endless sprocket chains 15, 16 embrace respectively, all .the sprocket wheels 9 and 10 next the two sides of the stove. Upon this pair of sprocket chains are suspended the ware boards in the manner now to be described. These wareboards 17 are preferably disposed in groups of three and are formed of slats of. wood lying parallel to each other with intervening spaces for the passage therethrough of heated air. These slats are firmly connected with each other by transverse bolts 18, so spaced apart as to afford rigidity to the boards. The bolts 18 at the respective ends of the boards 17 are passed through pairs of depending braces 19, preferably of iron. To prevent longitudinal way, the boards of each group are made of different lengths, decreasing from top to bottom boards, and the connecting braces 19 are deflected toward each other from top to bottom, as shown in Fig. 5. Each pair of braces 19 are connected at their upper ends by the metal strap or yoke 20 by rivets 21; and each of said yokes has firmly fixed upon it a metal spindle 22 which forms a connection between two links 23, 24 of the adjacent sprocket chain 15 or 16 and serves to swingingly suspend its connected group of ware-boards from such chains. These groups of ware boards are thus connected with the sprocket chains 15, 16 in as close proximity to each other as will permit of their passing each other without mutual contact in their prescribed course of movement throughout the stove, as indicated in Fig. 1; and owing to the manner in which they are connected with the sprocket chains 15, 16, they are readily passed by all the sprocket wheels 9, 10, there being no axle between the sprocket wheels 9, 9 to obstruct their passage between said wheels, which are of comparatively small diameter, while the groups of boards swing and pass belowthe N axles connecting each pair of sprocket wheels 10! and clear the floor of the stove.

By the construction thus far described I am enabled to pass a large quantity of ware at one time througha stove of minimum dimensions, for, as will readily be observed, the screw 1% operates to move the ware boards quite lowly over their prescribed course and the ware on its molds may be placed closely upon the boards as they pass upwardly by the opening 2, and removed therefrom as the boards pass downwardly by the opening 3. To heat and dry the ware while passing through the stove I provide radiators consisting of a plurality of small steam pipes 25 disposed horizontally and transversely of the bottom of the stove in a shallow'chamber formed in a concrete foundation 26 for the stove to rest upon. These radiators rest upon metal bars 27 spanning the spaces 28 into which air is admitted from the room in which the stove is placed and passes between the pipes 25 and up through the interior of the stove. To properly and fully utilize the heated air passing thus into the stove, ll provide the transverse vertical partitions 29 which substantially divide the interior of the stove into a series of compartments and induce an approximate equalization of the heat throughout the interior of the stove; and this object is aided by the radiators 30 placed in the two end compartments which are not directly over the radiators 25 and the temperature in which is apt to be reduced when outside air enters the compartmentsthrough the openings 2, 3.

To induce and regulate currents of heated air within the stove and to prevent its egress into the work room where the stove is installed to the injury of the health of the operatives, I have provided pipes 31 which pass transversely across the upper part of the stove and out through a side-wall thereof and open into the large ventilating pipe 32. See Figs. 2 and 3. The pipes 31 have series of openings 33 in their lower sides and are provided with dampers 34 whereby the draft through said pipes may be regulated at will. The large pipe 32 extends to and through the outer wall of the building and is preferably provided at its discharge end with a fan wheel or other device (not shown) for forcibly drawing the moisture-laden air from the stove and discharging it outside of the building.

As the placing of the ware on the ware boards through the opening 2 and its withdrawal therefrom through the opening 3 causes the shedding of small particles of clay or dust from the ware boards, I have provided openings in the side walls closed by doors 35, 36, through which the accumulations of such dust may be cleared from time to time.

From the foregoing description the opera- .derstood tobe as follows.

ea ers tion of the drying stove will be readily un- The worm 14 being rotated turns the pair of sprocket wheels mounted on the shaft carrying the worm gear 13 and the two sprocket chains carrying the Ware boards are set in motion. The mololer or jiggerman, whose station is by the opening 2'in the stove casing, fills the boards with molds carrying the formed ware as they slowly pass upward by said opening 2, ample time being had for such purpose owing to the slow motion of the boards. This process is continued until the boards filled with molded ware reach the opening 3 on the opposite side of the stove, through which it is removed and taken to the green room for further drying, and this process may be continued indefinitely. While the wet ware is passing through the stove it is exposed to the heated currents of air passing upward through the several compartments and such air becoming moisture laden is drawn out of the stove and discharged through the ventilating pipes into 1. In a drying-stove the combination of 7 two series of sprocket wheels, respectively located in the upper and lower parts of the stove; continuous sprocket chains embracing said sprocket wheels; a plurality of ware boards having end connections with each of said sprocket chains; means for actuating said sprocket chains; a series of lateral partitions intervening between the ascending and descending series of ware boards; means for passing currents of heated air upwardly between said partitions and means for exhausting the air from the upper part of the stove.

2. In a drying-stove, the combination of two series of sprocket wheels located near the sides of the upper part of the stove and supported upon pintles projecting inwardly from said sides; two series of sprocket wheels located near the sides .of the lower portion of the stove; two sprocket chains embracing, respectively, all the sprocket wheels on one side of said stove; means for actuating said sprocket chains; groups of ware boards swingingly supported upon said sprocket chains by pintles entering links of said chains; vertical transverse partitions between the upward and downward courses of said sprocket chains, and means for creating currents of heated air between said partitions, and means for exhausting said air from the upper part of said stove.

3. In a drying stove, a group of ware boards spaced apart for the reception of ware and united at their respective ends by pairs of braces converging toward each other series of sprocket wheels embraced by said from their tops toward their lower ends, in sprocket chains, and means for actuating combination with ayoke uniting each pair said sprocket chains.

of braces at their upper ends; a spindle ex- RICHARD HANBURI WAINFORD.

5 tending outwardly from each of said yokes Witnesses:

and forming a connection between two links JOHN R. D. Bowen, of a sprocket chain; two sprocket chains and M. A. KRAMER.

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