US808990A - Hoisting apparatus. - Google Patents

Description

Rm 0 9 l 2 N A h D E T N E m A. PS I R R E F W & X 0 N K G L S 0 9 9 oo 0 8 nu N HOISTING APPARATUS. APPLICATION FILED OCT. 22,1904. RENEWED ROY/.29; 1905.

3 SHEETS-SHBET 1.

No. 808,990. v PATENTED JAN. 2, 1906.

' S. L. G. KNOX & W. FBRRIS.

HOISTING APPARATUS. APPLIOA'IION FILED 00'1. 22,1904. nmmwnn NOV.29, 1905.

3 SHEETS-SHEET 2.

PATENTED JAN. 2, 1906. S. L. G. KNOX'S: W. FBRRIS.

HOISTING APPARATUS.

APPLICATION FILED 001'. 22.1904. RENEWED N0v.29, 190s.

3 SHEETS-SHEET 3.

UNITED STATES PATENT oEEIoE.

SAMUEL LIPPINOOTT GRISWOLD KNOX, OF MILWAUKEE, AND WALTER FERRIS, OF SOUTH MILWAUKEE, WISCONSIN, ASSIGNORS TO THE BUOYRUS COMPANY, OF SOUTH MILWAUKEE, WISCONSIN, A CORPO- RATION OF WISOON SIN.

HOISTING APPARATUS- Specification of Letters Patent.

Patented Jan. 2, 1906 Application filed October 22, 1904. Renewed November 29, 1905. Serial No. 289,669.

To all whom, it may concern:

Be it known that We, SAMUEL LIPPI-NooTT GRISWOLD KNOX, residing at Milwaukee, and WALTER FERRIS, residing at South Milwaukee, county of Milwaukee, State of Wisconsin, citizens of the United States, have invented certain new and useful Improvements in Hoisting Apparatus; and We do hereby 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.

This invention relates to hoisting apparatus, such as wrecking-cranes and like mechanism, and has for its object to provide means whereby either one of two hoist-blocks maybe operated by a single cable and also to provide means whereby the idle hoist-block may be engaged and held clear of the load lifted by the other hoistblock.

To this end the invention comprises a hoist-- ing apparatus having a jib or similar supporting means upon which is suspended two hoistblocks by means of a single cable anchored at one end to the jibor support and engaging a hoisting-drum at the other end, an intermediate idler-sheave engaged by said cable, a clamp for securing the cable to the jib or support at a point intermediate the hoistblocks, and a clutch for locking one of the hoist-blocks to the jib, together with a hook or similar engaging member adapted to be brought into cooperation with the idle hoistblock to hold the latter against the jib or support out of the way of the load lifted by the other hoist-block, the clamp, clutch, and hook mechanism being operated by -handle vers and reach rod mechanism mounted upon the jib or support.

In the particular embodiment of the in vention illustrated in the drawings it is shown as applied to a wrecking-crane with the usual type of swinging jib but it is to be understood that the invention is capable of application to hoisting mechanisms generally where multiple hoist-blocks are employed.

Referring to the drawings, Figure 1 is a fragmentary side elevation of a wrecl ing crane embodying the invention. Fig. 2 is a plan view.of the forward end of the jib with the hoist-blocks and sheaves omitted to avoid confusion. Fig. 3 is a side elevation thereof,

showing the rope-clam and the pendular hoist-block clutch and th tions therefor. Fig. 4 is an enlarged perspective view, partly broken away, showing the arrangement and cooperation of the pendular clutch and the hoist-block.

Referring to the drawings, A indicates the usual type of railway wrecking-crane car, upon which is mounted the rotary superstructure B, carrying'the pivoted jib C and the usual operating mechanism therefor. The jib C is preferably built up of metal sections and has journaled in its forward end idlersheaves c, d, and 6, over which passes an operatingcable :r, anchored to the jib at one end by a bolt f and engaging the usual hoisting-drum at the other end.

Suspended in the bights of the cable depending from idlers c and d is the usual double rope-block I), provided with a load-lifting hook, as is common in wrecking-crane practice, while a multiple block a is suspended in the several bights of the cable between the intermediate idler d and the anchor f, the multiple bights of the cable passing over the e operating connecidler e and the sheaves of the hoist-block a.

and over intermediate idler d, about which it takes two or more turns, thence by several bights or turns about the several sheaves in hoist-block aand a corresponding number of sheaves on idler e to the anchor f. As above described, the purpose of the invention is to operate either of the hoist-blocks a, or b by means of the single cable as, and this is accomplished by the following apparatus: A transverse shaft 3, journaled on the upper side of the ib and overlying the intermediate idler d, is provided with an eccentric it, upon which is secured a brake-shoe w, adapted to engage the cable as it passes over the idler d and hold said idler and the cable against movement when the brake is thrown on. To

operate the brake, a link If, connected to a crank on the end of the shaft 8, serves to rock the latter and cause the eccentric on the opposite end of said shaft to apply or release the brake-shoe. To the lower end of said link is connected an operating device comprising a series of rod-sections v and intermediate bellcranks 2 the other end of the series of rodsections being coupled to a hand-lever z, pivoted to the side of the jib, so that the brake may be thrown on or off by an operator on the car manipulating the hand-lever 2. It will be seen that when the brake is applied the cable is anchored to the idler (Z, so that no motion is imparted to that portion of the cable which supports the hoist-block a and the latter remains stationary. The part of the cable forward of the idler d, however, may be taken up or paid off by the hoisting-drum and will run freely over the idler 0, thereby raising or lowering the hoist-block b.

In order to operate hoist-block (1 alone, it is necessary to secure hoistblock I) to the jib,

and to accomplish this suitable clutch mech-- anism is provided for locking hoist-block b to the under side of the jib and preferably in juxtaposition to the idler c. For this purpose hoist-block b is provided with a strap t, extending over the top of the sheave of said block, which strap is adapted to be engaged by a clutch carried by a pendular frame. This clutch mechanism consists of the following parts: A U-shaped pendular frame 72. is mounted upon the shaft 9 of idler c and is provided with two depending sections h, which are adapted to pass upon either side of the strap t to guide the hoist-block 1) into proper position to be clutched. J ournaled in the bottom of the U -shaped yoke 7L and in brackets extending from opposite sides of said yoke are two short shafts b I), having lateral wings a 0, respectively, which wings have inwardly-disposed angular fingers f f, adapted to engage the band of the strap t. Passing through the wings c c is a bolt Z, having a spring m, which is suitably tensioned by set-nuts 0, which spring tends to force the fingers toward each other, as indicated in Fig. 4. Mounted upon the upper end of the shaft 1) is a crank a, which engages the flanged rim of a collar 'L, loosely mounted on the shaft g to one side of the idler c. J ournaled in the adjacent side plate of the pendular yoke is a short vertical shaft m, upon the lower end of which is mounted a yoke Z, in the forward ends of which are slots k, which engage radial pins on the collar 1). On the upper end of the shaft on is an arm n, which is perforated at its forward end to permit a rod 0 to pass freely therethrough. Said rod 0 is provided with a suitable collar or setnut 1) beyond the arm n and is connected at its opposite end to a crank r, fixed to the shaft 8. It will be seen that when the shaft 8 is rocked by the hand-lever z and the connecting reach-rod mechanism to retract the rod 0, the set-nut p will engage the arm a, thereby rocking shaft m and the fork Z connected therewith, which in turn slides the collar t longitudinally of the shaft 9 and forces crank a inward, thereby rocking shaft 1) and moving fingerf laterally. A stop g on the shaft 1) engages a similar stop g on the shaft 12, so that as shaft 1) is rocked by its crank a shaft 7) will also be rocked in the opposite direction by the engagement of stops g g, and finger f will also be moved laterally, and the two fingers f f will be spread apart against the tension of spring m on the rod Z. If the hoist-block b be now lifted until the strap 71 passes between the fingers f j and shaft 8 be rocked in the opposite direction by means of the hand-lever z, the spring m will force the fingers f f toward each otheruntil said fingers slip under the strap 0; and clutch the hoist-block b to the ib.

It is to be noted that the pendular yokes 7L and v are pivoted to the shafts of idlers c and 6, respectively, so that each of said yokes will always hang vertically in position to engage the corresponding hoist-blocks irrespective of the relation of the jib Cthat is to say, whether the said jib be raised or lowered.

In hoisting a load by one of the blocks it is frequently found that the other block will obstruct the load in its upward movement. Hence we have found it desirable to secure the idle hoist-block to the jib so that it will clear the load lifted by the other block. This is effected by means of a hook q, pivoted to the jib, which is'adapted to engage an eye or loop 1/ on the hoist-block a, so that the latter will be held out of the path of the load lifted by block I). Said hook is operated by a reach-rod 1*, which is connected at its oppo site end to a hand-lever s, mounted at the foot of the jib adjacent to the hand-lever 2, so that as said hand-lever s is moved backward the hook will lock the hoist-block b to the jib, and when said hand-lever is swung in the opposite direction said hook q will be released from engagement with the hoistblock a.

It is to be particularly noted that the entire control of each of the hoist-blocks is effected from the single cable w and the handlever 2 on the jib, so that the respective hoist-blocks may be operated in all positions of the jib. For example, when it is desired to use hoist block a to lift a load the handlever 2 is pulled backward-that is, toward the foot of the jib-thereby rocking shaft 8 to release the cable-brake w and causing rod 0 to rock the shaft m, which, through the intermediate mechanism above described, spreads the fingers f f apart. Hoist-block b is then run up until strap t passes between the fingers f f, and upon the operator moving hand-lever z to mid position the spring m forces the fingers f 7 under the strap 01, and thereby clutches said sheave b to the I30 pendular yoke h, and therefore to the jib. The cable will now run over the sheave in hoist-block b as if the latter were a simple idler, and the hoist-block a may be run up and down at will. In order to employ hoistblock b in lifting, the hand-lever z is swung to its extreme forward position, thereby rocking the shaft 8, so that the eccentric u forces the brake to down upon the cable and clamps the same securely to the idler (I, thereby anchoring the cable to the jib at said idler d. This may be accomplished, of course, irrespective of the position of the hoist-block a; but it is preferable in order to distribute the strain on the cable to run said hoist-block a up until it engages the pendular yoke o.

What we claim as our invention is 1. In wrecking-cranes and likeapparatus, the combination of two hoist-blocks supported from the jib, an intermediate idler-sheave, an operating-cable engaging the hoist-blocks and intermediate sheave, means for locking the cable against motion between the hoistblocks, and means for locking one of said blocks to the jib,'whereby either of said blocks may be operated by the same cable.

2. In wrecking-cranes and like apparatus, the combination of two hoist-blocks supported from the jib, an intermediate idler-sheave on the jib, an operating-cable anchored at one end to the jib and connected to a winding-drum at the other end, said cable engaging the hoist-blocks and the idler, a clamp I01 locking the cable to the idler, a clutch for locking one of said blocks to the jib, and means for operating said clamp and said clutch, whereby either of said blocks may be operated by the same cable.

3. In wrecking-cranes and like apparatus, the combination oftwo hoistblocks supported from the jib, an intermediate idler-sheave on the jib, an operating-cable anchored at one end to the jib and connected to a winding-drum at the other end, said cable engaging the hoist-blocks and the idler, a clamp for locking the cable to the idler, a clutch for locking one of said blocks to the jib, a handlever, and reach-rod connections from the hand-lever to the clamp and clutch, whereby either of said blocks may be operated by the same cable.

4:. In wrecking-cranes and like apparatus, the combination of two hoist-blocks supported from the jib, idler-sheaves on the jib adj acent to each of said blocks, an idler-sheave on the jib intermediate the first-mentioned idler-sheaves, an operating-cable anchored at one end to the jib and engaging a windingdrum at the other end, a clamp on the jib for locking the rope to the intermediate idlersheaves, a pendular clutch on the jib for locking one of the blocks to the jib, a handlever, and reach-rod connections from the hand-lever to the clamp and the clutch, whereby either of said blocks may be operated by the same cable.

' 5. In wrecking-cranes and like apparatus, the combination of two hoist-blocks, an operating-cable therefor, and means for holding the idle hoistblock clear of the load lifted by the other hoist-block.

6. In wrecking-cranes and like apparatus, the combination of two hoist-blocks, an operating-cable therefor, and a hook on the jib adapted to engage the idle hoist-block and hold the same clear of the load lifted by the other hoist-block.

7. In wrecking-cranes and like apparatus, the combination of two hoist-blocks, an operating-cable therefor, a hook on the jib adapted to engage the idle hoist-block and hold the same clear of the load lifted by the other hoist-block, and a hand-lever and reach-rod on the ib for operating said hook.

In testimony whereof we afliX our signatures in presence of two witnesses.

SAMUEL LIPPINCOTT GRISWOLD KNOX. WALTER FERRIS.

Witnesses:

HARRY B. HAYDEN, PAUL C. Bonn.

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