US624660A - Power-shovel - Google Patents

Description

Patented May 9, I899.

- a. KIESLEB POWER SHOVEL. (Appliegtion med Feb. 1o, 1899.)

2 Sheets-Sheet I.

(No Model.)

N0. 624,660. Patented May 9,1899 J KIESLER POWER SHOVEL.

2 Sheets-Shut 2.

NITED STATES PATENT OFFICE.

JOSEPH KIESLER, OF CHICAGO, ILLINOIS.

POWER-SHOVEL.

SPECIFICATION forming part of Letters Patent No. 624,660, dated May 9, 1899.

Application filed February 10, 1899. Serial No- 705,l50. (No model.)

To all whom it may concern.-

Be it known that I, JOSEPH KIEsLER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Power-Shovels, of which the following is a specification.

My invention relates particularly to an improvement in power-shovels for use in unloading coal, grain, and the like material, as from the hull of a boat, and for analogous uses.

A power-shovel of the class to which my improvement relates involves as its generallystated construction a pair of pivoted scoopshaped cooperating jaws provided with mechanism for closing them on the material to be transferred, thereby to fill the shovel with the latter, and for opening them to discharge the materialat the point to which it is transferred.

My improvement relates particularly to the mechanism for operating the shovel-jaws, my object being to provide anovel and peculiarly eifective mechanism for this purpose, whereby, moreover, the weight of the jaws need not be nearly so great as is common in this class of shovels to adapt them to perform their filling function.

My present invention is in the nature of an improvement on the shovel for which Patent No. 563,492 was granted to me July 7, 1896.

It consists, generally stated, in the novel means herein shown for causing the force applied at the lifting-cable to be transmuted -into forces acting in a peculiarly effective manner to close the jaws of the shovel.

In brief, my present invention lies in lengthening and thickening the bars or links by means of which the dump-cable of the shovel shown in said patent is connected to the outer upper angles of the scoop-sections and supplying the same with a cap-piece, to which is attached one end of the lit tin g-cable, which latter passes about a movable pulley connected with the links or bars pivotally joined to said jaws at said angles, which latter links are arranged to convert the direct lifting force into a force acting at said angles to close the jaws. In other words, there are employed in my present invention two sets of links or thrust-bars joined to the outer upper angles of the shovelsections, one set of which serves to transmit the downward force exerted at the cap-piece to said outer angles, where it acts as a closing force, and the other set of which serves to transmit the upward force acting on the movable pulley (or drum) into a force acting at said angles to close the shovel-jaws.

In the accompanying drawings, Figure 1 is a transverse sectional view of a shovel equipped with my improvements, the section being taken as indicated at line 1 of Figs. 5 and 6; Fig. 2, a similar section,'but with the shovel-jaws shown open; Figs. 3 and 4, views in end elevation, showing the manner of joining theshovel-sections; Fig. 5, a plan section taken as indicatedat line 5 of Fig. 1; Fig. 6, a view in side elevation, and Fig. 7 a view of a modified form of link connection joining the movable pulley employed to the outer angles of the scoop-sections.

A A represent scoop-sections; B B, links or hinge-plates for joining said sections together at their inner upper angles; a a, studs or bolts forming the pivotal connections between said scoop-sections and the links B B;

C, a cross bar or shaft supported by and joining the plates B and 13; D, a pulley-block, in the upper portion of which is journaled a movable pulley D and which is provided with a slot 19 for receiving the shaft C; E E, links pivotally joined to said pulley-block and the upper outer angles of the scoop-sections; F F, two pairs of bars or links pivotally joined at their lower ends to the outer upper angles of the scoop-sections and at their upper ends to a cap-piece or plate G; H, the lifting-cable, attached at one end to a lug c on the lower surface of the plate'G and passing thence about the pulley D and thence through a perforation c in the plate (indicated in dotted lines) to the hoisting-drum, and I the dumpcable, connected withthe plate G by means of a lug d on the upper surface of the plate. The links E E and F F are joined to the upper outer angles of the scoop-sections by bolts or rods 6 e,preferably extending from one end of the section to the other, as shown.

The operation is as follows: The shovel is lowered (or dropped) by means of the dumpcable I till the open jaws rest upon the material to be transferred, the dump-cable being rapidly given slack to allow the shovel to fall and exerting an upward force at the pulley twice as great as the force applied to the hoisting-cable at the hoisting-drum, which force exerted at the pulley tends to move the latter relatively toward the plate G, thereby causing the links E E to approach parallelism on the principle of the toggle-lever, and

thus exert an ever-increasing closing force at the outer upper angles of the scoop-sections. Th us the downward force exerted at the plate G in drawing the plate and pulley D together and also the upward force exerted at the pulley during this action are both converted into closing forces acting through links upon the outer upper angles of the scoop-sections.

It is obvious that the movable pulley may be replaced by a movable drum without departure from my invention. The preferred methodis to use the pulley, however, and tohave the cable connection between the movable rotating member and the cap-piece a continuation of the lifting-cable, as shown. So, also, the connections between the movable pulley and the links E E may be changed, if desired. Preferably this connection is independent of the shaft 0, as herein shown; but this is not vitally essential. It may be remarked that the shaft 0 is here used only for strengthening purposes and to act in a sense as a guide to the pulley-block D.

The links E E are shown as joined to the pulley-block D at points f f respectively, the links being of sufficient length to cross, as shown. It is not, however, essential that the links should cross.

Fig. 7 shows the links E E joined .to the pulley D by separate links 'D D instead of by the single pulley-block D, above described.

lVhat I claim as new, and desire to secure by Letters Patent, is-

1. The combination of two coacting scoopsections, bars pivotally joined at their lower ends to the outer upper angles of said sec tions, a cap-piece having pivotal connection with said bars, links pivotallyjoined at their outer ends to said scoop-sections at the outer upper angles thereof, a dump-cable attached to said cap-piece, a movable rotatable member, connections between the free inner ends of said last-named links and said rotatable member, cable connection between said movable rotatable member and cap-piece, and lifting-cable extending from said movable member to the hoisting mechanism, substantially as and for the purpose set forth.

2. The combination of two suitably-joined coacting scoop-sections, bars pivotally joined at their lower ends to the outer upper angles of said sections, a cap-piece having pivotal connection with said bars, a dump-cable atat their outer ends to the outer upper angles of the scoop-sections, a movable pulley, connections between the free inner ends of said last-named links and said movable pulley,

and a lifting-cable attached at one end to the under side of said cap-piece and passing thence about said pulley and thence to the hoisting-drum, substantially as and for the purpose set forth.

31 The combination of two suitably-joined coacting,scoop'sections, bars pivotally joined at their lower ends to the outer upper angles of said sections, a cap-piece having pivotal connection with said bars, a dump-cable attached to the cap-piece, links pivotally joined at their outer ends to the outer upper angles of the scoop-sections, a vertically-mow able pulley-block having pivotal connection with the free ends of said last-named links,

a pulley or the like journaled in said block,

necting means between the free ends of said last-named links and said member, and cable connections for drawing the cap-piece and rotatable member relatively toward each other, thereby initially to close the scoop-sections and then raise the load, substantially as and for the purpose set forth.

5. The combination of two coacting suitably-joined scoop-sections,two pairs of bars F F pivotally joined at their lower ends to the outer upperangles of the scoop-sections, said pairs being on opposite sides of the transverse center line, a cap-piece pivotally joined to the upper ends of the bars,a dump-cable attached to the cap-piece, links E E pivotally joined at their outer ends to the outer upper angles of the scoop-sections at the longitudinal center of the shovel, a movable pulley or the like, connecting means betweensaid pulley and the free inner ends of said last-named links, and cable connections for initially drawing the pulley and cap-piece relatively toward tached to the cap-piece, links pivotally joined scoop-sections, links pivotally joined at their upper ends to the outer upper angles of said scoop-sections and crossing beneath said central shaft and pivotally joined at their free ends to said pulley-block, and cable connection for drawing the cap-piece and pulley rel= atively toward each other to first close the scoop-sections and then raise the load, substantially as and for the purpose set forth.

7. The combination of scoop-sections A A, hinge-plates B B, central shaft 0 joining said hinge-plates, a pulley-block provided with a slot through Which said shaft passes, links pivotally, connected to said pulley-block and to said scoop-sections at the outer upper angles of the latter, a pulley journaled in the pulley-block, bars pivotally joined at their lower ends to the outer upper angles of said scoop-sections, a cap-piece pivotally attached to said bars,a dump-cable connected with the cap-piece, and cable connection for drawing said pulley and cap-piece relatively together and lifting the load, substantially as and for the purpose set forth.

JOSEPH KI ESLER.

- In presence of- D. W. LEE, R. T. SPENCER.

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