US752635A - Worm-gear-operated slag-pot construction - Google Patents

Description

PATENTBD PEB. 16, 1904.

N. v@ FITTS. WORM GEAR OPERATBD SLAG POT CONSTRUGTIGN.

APPLICATION FILED MAY 19, 1.902.

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www No. 752,635. PATENTED PEB. 16, 1904.

N. V. TITTs. WORM GEAR OPBRATED SLAG POT CONSTRUCTION.

APPLICATION FILED MAY 19, 1902. N0 MODEL. 8 SHEETS-SHEET 2.

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` No. 752,635. PATENTEDFEB. 16', 1904. N. V. FITTS.

WORM GEAR OPERATED SLAG POT CONSTRUCTION.

APPLIGATION FILED MAY 19, 1902.

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- NORA/Ex UNITED STATES Patented February 16, 1904.

PATENT OEEICE.

NORMAN V. FITTS, OF DENVER, COLORADO, ASSIGNOR TO THE COLORADO IRON WORKS COMPANY, OF DENVER, COLORADO.

WORM-GEAR-OPERATED SLAG-POT CONSTRUCTION.

SPECIFICATION forming part of `Letters. Patent No. 752,635, dated February 16, 1904. Application filed May 19, 1902. Serial No. 108,095. (No modell.)

To all whom t may concern:

Be itlrnown that I, NORMAN V. Firrs, a citizen of the United States of America, residing at Denver, in the county of Arapahoe and State' of Colorado, have invented certain new and seful Improvements in Worm Gear Opera ed Slag-Pot Constructions; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the gures of reference marked thereon, which form a part of this specication.

My invention relates to improvements in Worm-gear-operated slag-pot constructions, and especially to means for manipulating the trunnioned slag pot or receptacle after dumping.

In this specification I will showand briefly describe a slag-pot truck of ordinary type, so far as general construction is concerned, and my improvements will be set forth in detail. With a construction of this character the pot or receptacle for receiving the molten slag as it comes from the furnace is of considerable size, and a worm engaging a worm-wheel fast on a trunnion of the pot is employed for dumping or discharging its contents, the worm being turned by a hand-crank. Heretofore the operation of returning the pot to its upright or normal position after dumping has been accomplished by a reverse movement of the worm, which is slow, tedious, and results in conslderable loss of time.

My improvement consists in providing vmeans for normally disengaging the worm In the drawings, Figure l is a central vertical section of the apparatus. Fig. 2 is a top view of the same. Fig. 3 is an end elevation illustrating a slag-pot truck equipped with my improvements and showing the slag-receptacle in the upright or normal position. Fig. l is a similar view showing the said receptacle tipped to the dumping or discharge position, the bowl being broken to make room for the view above. Fig. 5 shows the worm-manipulating lever in two positions and on a larger scale, the worm wheel and shaft and the rock-shaft being shown in section. Fig. 6 is a detail view illustrating the locking device for the worm-shaft, shown on a larger scale than in the other views.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate the body of the truck-frame, and 6 the Wheels upon which the frame is mounted. On two opposite ends of the slag-receptacle 13 the truck is provided with cogged racks 5d, forming tracks for segmental gears 14, made fast to the respective trunnions l2 of the said receptacle. Extending upwardly from the body of the frame on one end are two separated arms 5 8, to the upper extremity of which are attached extension-arms 5c, in which is journaled a rockshaft 7. Io the extremities of this shaft outside of its bearings are attached boxes 8, in which the worm-shaft 9 is journaled. These boxes 8 are provided with projecting hubs 8a, made fast to the rock-shaft, whereby as the last-named shaft is moved the Worm-shaft may be raised. The worm portion 9a of this shaft engages the upper portion of the periphery of a worm-wheel 10, made fast to one of the trunnions of the slag-pot, this trunnion being sufficiently extended for the purpose, as shown at 12d. Fast on the rock-shaft 7 is a lever-arm 15, provided with a spring-held dog 16, arranged to engage a notched bar 17, projecting upwardly from the frame of the truck, its upper portion being provided with a loop 17, forming a guide for the lever-arm,

Vwhich passes therethrough. When the lever is in the position shown in full lines in Fig. l and by dotted lines in Fig. 5, the worm is in engagement with the worm-wheel. The opposite extremities of the worm-shaft are fashioned to receive a detachable hand-crank 18.

From the foregoing description the use and operation ofmy improved construction will be readily understood. Assuming that thehandlever and worm are in the position shown indotted lines in Fig. 5, if the worm-shaft be turned the pot or slag-receptacle 13 will .be turned on its trunnions and tilted from the position shown in Fig. 3 to the discharge or dumping position shown in Fig. 4. Simultaneously with the d umping operation the pot is carried outwardly on one side of the truck by virtue of the engagement of .the segmental gears with the racks 5d.

To prevent the slag-pot from dumping accidentally or until the proper time, a lockingarm 19 is employed. This arm is pivoted on the rock-shaft 7 and provided with a recess or notch adapted to engage a part of the wormshaft, which is angular, preferably square in cross-section. This construction is illustrated on a larger scale in Fig. 6 than in the other views. When the user is ready to dump the slag receptacle or pot, the locking device is disengaged from the worm-shaft and raised to the position shown by dotted lines in Fig. 6. The slag-pot may then be dumped by turning the worm-shaft, as will be readily understood. As soon as the slag has been discharged the lever-arm l5 is moved downwardly to the position shown by full lines in Fig. 5, whereby the worm-shaft is raised suiiiciently to disengage the worm from its wormwheel l0, when the slag-pot will immediately assume the upright position automatically by virtue of the fact that its bottom is made suiiiciently thicker or heavier than the upper portion of its walls to produce this result.

Attention is called to the fact that by virtue of the shape of the slag-pot, whereby it is small at the bottom and increases in size toward the top when it is iilled with slag, the greater portion of the contents is at the top, making the receptacle top-heavy, and therefore easy to tip to the dumping position. By throwing out the worm when the pot is full of slag it can when desired be dumped rapidly as well as operated by the gears. This is permitted by reason of the fact that the pot is top-heavy when full, as aforesaid. However, as soon as the slag is dumped the reverse is true and the pot-bottom is relatively heavy by virtue of the greater thickness of its lower portion, as described.

Having thus described my invention, what I claim is 1. In a slag-pot-truck construction,the combination with a truck-frame, the slag-pot, the worm-shaft and the worm-wheel engaged by said shaft, of a .rock-shaft journaled on the truck-frame parallel with the worm-shaft, boxes fast on the rock-shaft in which boxes the worm-shaft is journaled, and means for operating the rock-shaft to lift the worm from engagement with the worm-wheel, substantially as described. I

2. The combination with a slag-pot-truck frame, the slag-pot, a worm-wheel fast on a trunnion of the pot, and a worm-shaft whose worm engages the worm-wheel, of `movable boxes in which the worm-shaft is journaled, a lever-arm and a suitable connection between the lever-arm and the movable worm-shaft boxes whereby the worm-shaft may be raised from engagement with the worm-wheel, as the lever-arm is actuated, substantially as described.

3. Thecombination with the slag-pot-truck frame, the slag-pot, a worm-wheel fast on a trunnion of the pot, and a worm-shaft -whose worm engages the worm-wheel, of a rockshaft parallel with the worm-shaft, wormshaft journal-boxes provided with hubs fast on the rock-shaft, and means for imparting to the rock-shaft a partial rotation whereby the worm is lifted suiiciently A to disengage it from the worm-wheel, substantially as described.

4. The combination with a worm-gear-operated slag-pot, of a rock-shaft extending parallel with the worm-shaft, worm-shaft journal-boxes connected with the rock-shaft t0 raise the worm-shaft as the rock-shaft is actuated, substantially as described.

5. The combination with aworm-gear-operated slag-pot construction, of means for disengaging the worm from its worm-wheel consisting of a rock-shaft having boxes in which the worm-shaft is journaled, substantially as described.

6. The combination with a worm-gear-operated slag-pot construction, of means for locking the worm-shaft against accidental movement, and means for disengaging the wormshaft from the worm wheel comprising a rock-shaft having bearings in which the wormshaft is journaled.

7. The combination withaworm-gear-operated slag-pot construction, of a rock-shaft extending parallel with the worm-shaft, wormshaft bearings fast on the rock shaft, and means for actuating the rock-shaft to raise the worm from the worm-wheel, substantially as described. v

8. The combination with aworm-gear-operated slag-pot construction, of a rock-shaft extending parallel with the worm-shaft, journalboxes connected with the rock-shaft substantially as described, a lever-arm fast on the rock-shaft, a notched guide-arm throughwhich the lever-arm passes, and a spring-held locking-dog mounted on the lever-arm and arranged to engage the notches of the guide-arm.

9. In a worm-gear-operated slag-pot construction, the combination of a rock-shaft suitably journaled, a connection between the rockshaft and the worm-shaft whereby as the rockshaft is actuated the Worm-shaft is disengaged IOO IIO

ISO

10.` In a worm-gear-operated slag-pot con-` struction, the combination with a rock-shaft lying parallel with the wormshaft, worm-shaft journal-boxes having hubs connected with the journal-boxes as described, said hubs being fast on the rock-shaft, a lever-arm fast on the rock-shaft, a notched guide-arm through which the lever-arm passes, a spring-held lockingdog mounted on the lever-arm and arranged to engage the notches of the guide-arm, and a locking-arm mounted on the rock-shaft and having a recess adapted to engage a portion of the worm-shaft, to lock the latter against accidental movement, the worm shaft being formed angular in cross-section for the purpose, substantially as described.

11. In a worm-gear-operated slag-pot construction, the combination of aroclr-shaft suitably journaled, and a connection between the rock-shff't and the worm-shaft whereby as the rock-shaft is actuated the worm-shaft is disengaged from the worm-wheel.

12. In a dumping-car, the combination of a receptacle of greatest area at its top and gradually diminishing in area to its bottom and trunnions supporting said receptacle at apoint to permit the lower end of the receptacle to overbalanceV the upper portion when empty and be overbala'nced thereby when'full.

13. In a dumping-car, the combination with a semi-oval bowl or receptacle, trunnions supporting the samein such manner that the receptacle will be top-heavy when full, and means for slowly tilting the receptacle or permit it to rapidly dump.

14. In a dumping-car, the combination with a receptacle, of trunnions supporting the same in such manner that the receptacle will be topheavy when full, segments on said trunnions, rigid platforms supporting the segments,a worm-wheel on a trunnion, and a worm to turn said worm-wheel and roll the segments on the platforms to tilt the receptacle.

15. In a dumping-car, the combination of a receptacle pivotally supported and top-heavy when full, a worm-wheel connected with the receptacle, a worm to turn said worm-wheel,

and means for throwing said worm out of en-4 gagement with the worm-wheel to permit the receptable to fall to its dumping position.

In testimony whereof I aX my signature in presence of two witnesses.

NORMAN V. FITTS.

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