US1437661A - Safety cupola tapper and stopper - Google Patents

Description

A. G. KAISER, J. NAHIRNY, AND C. F. ERXLEBEN.

SAFETY CUPOLA TAPPER AND STOPPER.

APPLICATION FILED JUNE 6,1922.

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A. G. KAISER, J. NAHIRNY, AND C- FJERXLEBENQ SAFETY CUPOLA TAPPER AND STOPPER. APPLICATION FILED JUNE 60 1922. 1,437,661, Patented De0. 5',1922

Charles EE'Ir g Bm Z fiq' Awormgya Patented Dec. 5, 19122;.

ANTHONY G. KAISER, JACOB NAHIRNY, AND CHARLES F. ERXLEBEN, OF ST. LOUIS, MISSOURI, ASSIG-NORS OF ONE-EGURTH TQ'THE IKEDART COMPANY, OF ST. LOUIS,

MISSOURI.

SAFETY CUIPOLA TAPPER AND STOPPER.

Application filed June G, 1922. Serial No. 566,333.

T 0 all whom it may concern Be it known that we, ANTHONY G. Knrsnn, JACOB NAHIRNY and CHARLES F. Enxnnenn, citizens of the United States, Poland, and the United States, respectively, and residents of St. Louis and State of Missouri, have invented certain new and useful Improvements in Safety Cupola Tappers and Stoppers, of which the following is a specification. I

This invention relates to an improved device for opening and closing the tap hole of a cupola furnace. I

It is general practice at the present time to employ a pole about ten feet long with a wet fire clay butt on the end thereof which is forced into the tap hole when it is desired to stop the flow of molten metal.

This is open to many objections and is the frequent cause of accidents. It requires skilled labor and where the foundries run a continuous heat, the cupola man must be frequently relieved.

The object of our invention is to provide a device for stopping and ta-ppingthe tap hole of acupola or similar furnace that will be simple and eflicient and canbe operated by any employee after short instruction without danger to any of the workmen.

Another object is to provide such a device that will be especially useful in furnaces.

having a continuous flow as it enables the elimination of the usual double spout.

A further object is to provide a device that can be adjustable so that it will exactly fit the tap hole, and can also be moved out of the way for repairs to the spout or when H it is desired to substitute anew stopper.

Other objects will be apparent from the following detailed description and the appended claims.

In the drawings:

Figure 1 is a side elevation of the device with the furnace wall in section.

Figure 2 is a top plan view of aportion of the device.

Figure 3 is an end View of the device.

Figure 4 is a sectional view of the stoper. 7 p The cupola wall 1 is of the usual construction and is provided with a tap hole 2 through which the molten metal flows into a trough 3 having any suitable lining 4. @n one side of the trough are fastened brackets 5 and 6 terminating at their upper ends in ears in which is mounted a rod 7 which may be held by screws 8 or other similar fastenings which permit free turning movement of the rod 7. Collars 9 and 10 are mounted on the rod 7 and held by fastenings 11 in positions where they abut the brackets 5 and 6 respectively. In these collars are mounted rods 12 and 13 that extend across the trough 3 above the edges thereof. These rods are held in the collars by set screws 14 or similar fastenings. I

On therods 12 and-13, over the middle of the trough when in operative position, is mounted a casting 15 held in adjusted position by a set screw 16 engaging the rod 13 and a similar set screw 17 engaging the rod 12. By means of these set screws the casting 15 may be adjusted laterally of the trough. A second casting 18 has downwardly ex ending ears 19 at the outer end which it on each side of the upper portion of the casting l5. Registering openings are provided in the ears 19 and the casting 15 and a shaft 20 fits therein. A set screw 21 fastens the shaft 20 and casting 15 together allowing the casting 18 to rotate about the shaft 20 as a pivot.

The body of the casting 18 is formed as a hollow cylinder 22 and in said cylinder is adapted to slide a plunger 23into one end of which is fastened a rod 24 carrying the stopper 25 at its other end. The front end of the plunger 23 is provided with cars 26 between which fits the end of a link 27 whichis held by a pivot pin .28 passing through the ears 26 and link 27. The front end of the link 27 is detachably pivoted in any suitable manner at 28 to a lever 29 the end of which is pivoted at 30 to an upward extension 31 of the collar 10.

The under side of the cylindrical member 22 restsagainst anadjustable set screw 32 screwed into the casting 15, and this screw limits the downward movement of the cylinder and the plunger 23 carried thereby, and

may be adjusted so that the stopper 25 will be exactly aligned with the tap opening 2. The casting 15 is also provided with a cam surface 33, best shown in Figure 1, and the plunger 23 carries in a depression in its un-' and-dash line position so that the stopper 25 may be lifted out of line with the tap hole 2, thereby avoiding any interference of the parts with the iiow oi? metal from the opening.

A steel cable 36 is fastened at one end to the lever 29 at 37 and passes over a pulley 38 carried in a bracket 39 i'ixed to the side of the trough 3. At its other end the cable carries a weight so. Gbviously when the handle 29 is released, the weight 40 will return the parts to operative position, the screw 32 determining the limit of down.- ward movement or. the parts.

Referring particularly to Figure l, the stopper or butt 25 is shown as being prei? erably constructed in the following manner. A steel nut 41 is screwed on the end of the rod 24 and has a covering of tire clay 42. The body 43 of the stopper is formed of suitable ingredients, such as those used in the manufacture of crucibles. The body is held in position by a screw bolt ll that passes therethrough and screws into the nut all. The bolt is countersunk in the body and the depression is iilled with the clay a5 to protect the bolt from heat.

The breast 46 of ti 9 cupola l surr'nindingthe tap hole is formed of fire clay, river sand and ground lire clay brick mixed with mola sea water. the butt of stopper 25 is pressed into it, forming a depression surrounding the tap hole which will exactly match the stopper. Thisprovijdes for a perfect fit between the two engaging parts,-and also provides a greater surface of engagement than is usually the case.

It is to be noted that thron screws 16 and 17 the device may laterally as a whole over the trough. w -c variation of the set screw will d the normal vertical position of the plunger. By these adjustments the s opper wi l he positioned so that it automatically returns to perfect working position upon a release of the handle 29.

The whole device may be swung to one side about the shaft 7 when repairs arenecessary. If the new stopper is needed the nut ll may be uns rewed "ti :1 the rod 9 or the rod 24; may be unscrewed from the plunger member 23. Furthermore, by a detachment oi the pin 28 the whole plunger may be quickly removed. it is obvious therefore that a new stopper may be quickly substituted for an old one without any olelav 1 the operation of the device. I

r owever, a stopper constructed in the manner described will. have a long life and require replacement ini'equentl v. It is obviou's that certain features oi the invention may be used without others, and that minor changes may be made in form and propertionwv'ithout' departing in any way from the sl hile it is still in'a soft state 'rit oi the invention. lt is to be underod that the i. ventiou is to be regarded as l ited only by the s ope of the appended claims.

T e c aim as our invention.

tapping? apparatus tor furnaces havrhe usual taphole and trough leading from, comprising a frame rotatably moiui.-cd on the side 0' the trough to turn about a guide carried by said frame, a p11 1 Eli able in said guide, a stopper connected to said plunger and adapted to close the tap hole, and means for ting said plunger. A tapping apparatus for furnaceshavthe usual tap hole and trough leading e; om, comprising a name carried by n. a guide carried by the frame, a slidable'in said guide, a stopper connected to said plunger and adapted to close the tap hole, manual means for moving said plunger to open thehole, and means'tor automatically moving the plunger'toclo'se the hole.

8. A tapping apparatus tor furnaces having the usual tap hole and trough leading therefrom, comprising a frame mounted on the side oifthe trough, a guide adjustably mounted on said frame, a plunger slidable in said guide, means carried by said" plunger to close the tap hole, a lever connected to said plunger to move the sa1ne,'andmeans tendi J to move the lever to position to cause said. means to closethe tapholef.

L. A tapping device for t'urnaces'having the usual tap hole and troughleadin'g' there from, comprising a frame rotatably mounted on the side of the trough, a guide adjustably and rotatably mounted on said frame, adjustable means for deter lining the normal position of the guide, a plunger slidable in said guide, a stopper carried by said plunger, and means for operating said plunger.

5. A tapping device for furnaces having the usual tap hole and trough leading therefrom, comprising a frame rotatably mounted on the trough, a. guide adjustably and rotatably mounted on said frame. a plunger slidable in said guide. a lever for moving the plunger in one direction and automatic means for moving the plunger in the opposite direction.

. A tapping device for furnaces having the usual tap hole, comprising a support, a guide rotatably mounted on said support, a unger slidable in said guide insubstantial alignment with said tap hole, means for w thdrawing the plunger, and means for elevating it as it is withdrawn.

7. A tapping device for furnaces having the usual tap hole comprising a support, a guide rotatably mounted on said'support, means for determining the normal position of said guide, a plunger slidable insaid guide in substantial alignment With the tap hole, means for Withdrawing the plunger, and means "for rotating the guide as the plunger is withdrawn.

8. A tapping device for furnaces having the usual tap hole, comprising a support, a guide adjustably and rotatably mounted on the support, means for limiting the rotary movement of the guide in one direction, means for closing the tap hole slidable in said guide, and means for controlling said slidable means.

9. A tapping device for furnaces having the usual tap hole, comprising a support, guiding means adjustably and rotatably mounted on said support, stopper carrying means positioned by the guiding means, and means for operating the stopper carrying means.

10. A stopper for furnace tap holes comthreaded. thereon a fireclay coating for said nut a composition body, a threaded bolt for attaching the body to the nut the head of which is countersunk in the body, and a fireclay filling for the countersink.

11. A stopper tor furnace tap holes com prising supporting rod, a metal nut carried thereby, a composition body a threaded bolt for attaching the body to the nut, and refractory coatings for the nut and head of the bolt.

.12. A stopper for furnace tap holes comprising a supporting rod, a metal nut carried thereby a composition body, means for attaching the body to the nut, and a refractory coating for exposed metal parts.

In testimony whereof, We have hereunto subscribed our names.

ANTHONY G5 KAISER. JACOB NAHIRNY. CHARLES F. ERXLEBEN.

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