US1785090A - Crane - Google Patents

Description

A. B. JACOBY Dec. 16, 1930.

CRANE Filed Sept. 25, 1929 2 Sheets-Sheet 1 INVENTOR.

' ATTORNEYS A. B. JACOBY Dec. 16, 1930.

CRANE 2 Sheets-Shet 2 Filed Sept. 25, 1929 INVEN TOR. m 6 BY 2 2 (fig ATTORNEY-i picking up or depositing-of the coils, he falls Patented Dec. 1 6, 1930 UNITED STATES PATENT OFFICE j ARTHUR n noonY, or ml nnnnzrown, OHIO, newto To m Aivinnicen ROLLING MILL COMPANY,'OF MIDDLETOWN, oHIo, A CORPORATION OF OHIO CRANE Application flied Se tember 25, 1929. Serial No. 395,063.

The primary purpose of my invention is the provision of means for holding the hook or book sheaves of a crane against turning or twistingduring the raising or loweringthere;

. 5 ofor during the traveling of the .crane. An-

other object is the provision of "means fo r varying somewhat the speed of the hoisting or lowering of the hook end. i

10 While myinventionis useful in a number the coils out of the coiler onto an extension of the shaft, so'that they may be reached by a crane. A traveling crane. is equippedwith a cradle which may pick up the coils when properly engaged. The operator raises the coil a little by means of the cradle, then trolleys outwardly to disengage the coil from t-he shaft extension, afterward carrying the coil awayto storage. If the hook sheave, turns,

the cradle of course turns with it; and it'be comes very difficult for the crane man to make a satisfactory pick-up, frequently requiring 0 the services of another man'onthe ground.

In one mill there are three shafts Iupon which coils are formed. The'coils are taken 7 only a few feet away and. depositedin the upper end of a chute. In spite of this short 5 haul, when the mill is runningssteadily, the

crane operator can just about keep up :with the work of transferring the coils if his cradle remains in alignment and he can make pickups without delay. But if thehook: swings or turns enough either to prevent theproper behind in his work and is unable to regain any of thelost time until the mill stops My invention has solved this problem.

down the hoisting speed at the start on actual sheaves to "a: useful It provides a way of holdingthe cradle in a'fixed pickup, and afterwardsincreases it progres sivelyduring thelifting. q Thisis of especial advantage in that it enables theoperator to 7 remove the coil from the shaft by trolleying outwardly "without actually stopping the drum.

invention by that certain construction and ar- .rangementof parts of which I shall now describe an exemplary embodiment, reference being had to the drawings which accompany these specifications.

Inthe drawings: a Figure lis a semi-diagrammatic representationof my crane construction, Figure 2 is a front elevation of a crane embodying my invention.

Figure 3 is a side elevation thereof with parts omitted.

In Figure '1 I have shown the winding drum, 1 ,of a, crane. Power is supplied to this drum through afgear, 2 on one end.

Cables 5 and 6 are dead-ended to the drum as at 3; and the rotation'of thedrum serves to wind upor pay out these cables simultaneously. The hook block 12,'has sheaves 7 and Sever which the cables run. In standard "crane construction the portion's 9 and 10 of the cables which liebeyond the hook block, form. axcontinuous loop passing around an.

equalizer sheave mounted upon the crane body.

I accomplish these and other objects of my v ,In consti'uctionphowever, the cables pass around sheaves l4 and 15, and extend beyond forming portions '16 and 17. These portions passfloutwa'rdly and downwardly, over additional sheaves 18 and 19 and thence passto and are dead-ended as at 20 and 21 to extensions on either side of the hook block. In Figures 1' and 3, the extensions are formed a prolongation of the shaft 11 "of the hook sheaves; in Figure. 2 an angle iron member 11a which is part' o f the hook block, or. attached thereto, serves the same purpose; It; will be clear that the cable portions 16 and 17 pull outwardly on the hook block and prevent it from turning. Itjwiljlalso be clear from the diagrammatic showingofFigure 1 that initially the hoisting speed is slowed: down because the cable portions 16 and 17 must be shortened, in lifting, corresponding to the portions 9 and 10,

and 5 and 6. The speed will be diminished until the cable portions 16 and 17 become horizontal or nearly so, but the hoisting speed will gradually be increasing until this point is reached. Concomitantly, the power requirements will be less than in the standard crane describedabove until the cable portions 16 and 17 become substantially hori-' zontal, when the power requirements are the same. The construction described above is an adaptation of the standard four-reeve hoist to my invention. If a greater reeve-up is desired, it will be understood that more sheaves are inserted in the hook block between the sheaves 7 and 8, and a corresponding number of idler sheaves are mounted on the crane body between the sheaves 1 1 and 15, over which sheaves the cables pass before passing over sheaves 1st and 15, and over sheaves 18 and 19 to be dead-ended on the hook block.

Referring now to Figure 2, I have shown ,a crane riding by means of wheels 24 upon tracks 25 afiixed to two or more bridge girders 26. The wheels support the crane body comprising side members 22 and 23 in which the drum 1 is journallcd, and a trolley base 27. In my construction a' sheavev support 29, angular in shape and formed of interspaced members, is supported by members 28 from the trolley base. Cables 5 and 6, dead-ended on the drum at 3 and 1, run to the sheaves 7 and 8 in the hook block 12 which carries the hook 13. Thence the cables run to sheaves 14 and 15 in the sheave support 29. If this sheave support is properly placed, the sheaves 14 and 15 on their shafts 14a and 15a may be set square with the sheave support. This is likewise true of the sheaves 18 and 19 when the extensions of cable portions 9 and 10 passing over them are brought back and attached to extensions on the hook block 12 such as those formed by the angle iron member 11a, which extensions fall vertically beneath the center line of the sheave support, as shown in Figure 2. Where, however, the cable portions 16 and 17 are brought back and deadended to extensions of the hook block main shaft 11, as shown in Figure 3, the sheaves 18 and 19 and their shafts 18a and 19a must be canted in the sheave support. The angular arms of the sheave support are made as long as practicable, where the hook block descends through a considerable distance, so that the sidewise pull of the cables on the hook block extensions may have the greatest effective angle. For shorter hoists, the sheave support length, or the distance apart of sheaves 18 and 19 may be proportioned as found desirable.

It will be understood that modifications may be made in my invention without departing from the spirit of it.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a crane, a hook block and means to prevent the turning thereof, comprising opprising opposed cables brought down at an angle and attached to said hook block, said cables being part of the hoisting cable arrangement whereby they are automatically taken up and payed out during the hoisting and lowering of said hook block.

3. In a crane, a hook block and means to prevent the turning thereof, said means comprising cables and a plurality of sheaves to conduct the ends of the cables in opposed relationship outwardly and downwardly, said cables running over said sheaves and being dead-ended to said hook block.

4:- In a crane, a hook block and means to prevent the turning thereof, said means comprising cables and a. plurality of sheaves to conduct the ends of the cables in opposed relationship outwardly. and downwardly, said cables running over said sheaves and being dead-ended to said hook block, said cables being part of the hoisting cables of said crane.

5. In a crane having a hoisting drum and a hook block with sheaves, cables attachedto said drum and running over said sheaves, and fixed sheaves to carry the unattached ends of said cables outwardly and downwardly, said ends being fastened to said hook block.

6. In a crane having a hoisting drum and I a hook block with sheaves, cables attached to said drum and running over said sheaves, fixed sheaves to carry the unattached ends of said cables outwardly and downwardly, said ends being fastened to said hookblock, and said cables approaching said hook block at an angle to the cable portions running thereto from said drum whereby the outward pull of said cables holds the block from turning in all positions.

7 In a crane, a drum, a hook block with sheaves, cables dead-ended to said drum and passing over said sheaves, and additional sheaves supported by the crane body to receive said cables and conduct them outwardly and downwardly, said cables thereby being caused to approach said hook block at an angle and being dead-ended thereto, the angle of approach of said cables to said block being variable with the height of said block, whereby the hoisting speed is variable for a constant drum speed.

8. In a crane, a body, a drum, a hook block with sheaves, cables passing around said drum and through said sheaves, a sheave turning in any support fastened to said crane body, and sheaves .in said support to receive the ends of said cables and conduct them outwardly and downwardly whereby they may be caused to reapproach said block at an angle to the vertical.

9. In a crane,a body, a drum, a hook block with sheaves, cables passing around said drum and through said sheaves, a sheave support fastened to said crane body, sheaves in said support to receive the ends of said cables and conduct them outwardly and down-

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