US1628972A - Rotatable block housing - Google Patents

Description

y 1927' E. HANSEN ROTATABLE BLOCK HOUSING 2 Shun-Shoat 1 Filed June 16, 19 23 /4 I 1 Ire/06127150 9 Ham/6622 y 3 LE. HANSEN ROTATABLE BLOCK HOUSING set 2 if. iiaivs ezz/ Patented May- 17, 1927.

- UNITED STATES Lonnn'rz EMIL HANSEN, or BERGEN; NORWAY.

RO'I' ATABLE BLOCK HOUSI NG.

Application filed June 15, 1923,,Seria1 No. 645,840, and name June as, 1922.v

The present invention relates t an arrangement of rotatable blockhousm-gs and the invention .is mainly characterized by the block housing being fastened, by, means of turning r ngs or the like, to its support or base part in such a manner that the housing with theblock sheave fully loaded may be turned or rotated horlzontallyinto any positionwithout incur'rmgany shifting ot the hoisting line, which-always remains in the I centre of the'circleof rotation. Further the invention consists in eli'ectively, in that the uppermost deckbecomes unobstructed (cleared) ,xWlllCll is very advantageous for the placing or declecargo, such cargo being also better protected than usual thereby against damage from the seawater.

The above mentioned advantages are ob.

tained .by arranging a rotatable block at'the top of the crane mast, so that thehoisting line may be passed down through the interior of the mast and to the hoisting machinery through suitable passages above or below the deck. The-hoisting machinery may be placedbelow the deck or in asuitable deck erect-ion so as 'to be protected,

against damages from sea-water orthe like. The hoisting'lines. may for instance all be conducted tothe middle part ofthe'ship so that the winches'may all be located in the midship" deck house and therebyalways 'be under the control of the engine'sta'ft. 'TlllS is especiallyadvantageous when electrically operated winches are employed, because the sorting apparatus for such winches, which apparatus occupy but a small space, maylhe located at'any convenient place'at' which the.

cated at any convenient placeon the ship without reducing the effect of the cranes. Further the cranes themselves may b65111 plified considerably, n that all cantilevers for the derricks may be dispensed with above the use. of such block housings in connection withv hoisting cranes on board ships, whereby such cranes may be simplified and utilized most ing rib 55.

and below. .Hereby the area of action of the crane, in the lateral direction is increased.

For unobstructed cranes the-area of action is:-i,1 1creased, to 360". 7 The above mentioned system may naturally be. employed atany; place, but in the following deSol'iption the same will for the sake of simplicity only be described in connection with ships.

-A constructional formot the invention is 1 g, drawings, 1n 'WhIGh-fshown by way {of example inthe accompany Figure '1 is-a vertical'section through the block'- housing; V

Figure 2 is a plan view of thesame; Figure 3-isapartial side view of a ship equippedwith the invention;

'Eigure4is a front View. of asetot cranes; Figure 5 is afront view-0tv a novel swivellink ot'the derrick.

v Figure 6 shows the samepartially in section and-seen from the. side.

Tothe, base plate 42 (Figures 1 and 2) a ring or circular guide 43 is fastened'which at its periphery is formed with av groove 44 or thelike, in which the flange-.47- of a cover lsembedjded, said cover being formed from two semi-circular portions "45' and 46. Elie flange 47 serves for s'ecuringvthe rela-,v

tive position of the ring=43 and=the cover 45, 46. Each of therhalves 4.5 .a11d 460i the cover; is equipped with-flanges 148, 49 through which screws 50 are'passed. :By: means of these screws thecover-halvesare clamped to the rin-g' 4S; Theupper plateol ofthe cover rests upon the upper faceof' the ring 43 and maybe rotatedcupon this.

In order to reduce the friction between the ringj43 iand, the cover, ball bearings (not shown.) may be arranged between the ad jacentrtaces. I On+thecover 45, 46 a block'housing52 is tastenechthe same beingiformed witlrflanges 53, which are fixed'by means of screws-54 56 is the block sheave, which by means of 7 a pin el 18 rotatably arranged in the block housing 52. 58 is the hoisting line, which is tothe cover,- so thatthe:housing lies sym-,

passed through an operture' 59 the cover I plate 51 and through an aperture 60 in the base plate 41-2. According to the drawing the aperture 60 is 01 the same size as the aperture 59, but it will be understood that the diameter of the former if desired may be made like the inner diameter of the ring 43. As will be seen the block housing with the sheave is arranged in such a manner on the cover 45, 16, that the hoisting line 5 8, will be situated in the centre 01 the cover and the ring 13 at any horizontal position of the block housing 52.

The Figures 3 and 4 show the use of such block housings with cranes on boardships.

The crane masts 2 and 3 of the ship 1 are in the present instance hollow and are located at a suitable distance lromeach other in a plane transversely to the longitudinal axis of the ship. Near their upper ends the masts are interconnected by means of a traverse or cross-piece 41, upon which the mast-head 5 is fastened. At the top of each of the masts 2, 3 a block housing 52 is arranged, comprising a block sheave, so that the hoisting line 58 may be passed over the top sheave 8 of the derrick 7 down into the interior of the masts. As will be understood it is not necessary that the line is passed exactly through the centre of the mast, in that it also may be disposed eccentrically to the axis of the mast. At their lower ends the derricks 7 are rotatably fixed, so that they may turn in the vertical direction.

A fork 14c engages the outsides of the taslemng ears of the derrick 7 on the ring 10.

The upper end of the fork 1% is formed with an eye 15 for the fastening ot a block 16, which together with the blocks 17 and 18 of which the former is fixed to the rotatory ring of the block housing A whereas the latter is fixed to the derrick head-servetor the guiding of a line 19 by means of which the derrick 7 may be held in different positions and the angular position of the same may be varied. One end of the bolt 9 is further formed with wings 20 to which the free end of the line 19 may be fastened.

Owing to the fork 14- the derrick may without hindrance be swung up into its maximum height position. Simultaneously the usual cantilevers for the derrick may be dispensed with, as the pressure of theload will be-better distributed on the derrick as well as on the mast, when the hoisting line is arranged as above described. Further, the lateral swinging of the derrick will be facilitated considerably, as its suspension (the line 19) will swing round the mast together with the derrick so that no bending occurs.

The winches may be arranged behind the masts 2, 3 in suitable deck houses 21, so that only the drums (22, of the winches are situated outside the said houses. The houses may be equipped on different sides with covers or doors 241 and port-holes through which the crane operator may survey the loading. hen steam winches are employed the starting valve and the reversing gear (not shown) may be placed on the roof of the house 21. r 7

Owing to the arrangement of the winches in the described manner in a deck house, the entire upper deck will be tree for placing the deck load and at the same time the winches are securely protected against damages from water, breakage and the like.

When employing electrically operated winches the same may be arranged amid shlps.

The derricks 7 shown 1n Figures 3 and a need only swing about because two cranes are arranged side by side. The derricks may however also swing about 180, provided that no stays or shrouds are fastened to the mast.

On fully unobstructed cranes the derricks may swing about 360. This is very advantageous especially when the crane is located between two hatches, as the crane then may be employed at both hatches.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. In combination with a crane having a hollow mast, a circular guide secured at the upperend of said mast, said guide being provided with a peripheral groove, a cover plate adapted to cooperate with said groove for rotation therein, a housing on said plate and a sheave in said housing, said housing, plate'and guide being provided with openings to permit a cable to be passed over said sheave and through said mast.

2. crane as claimed in claim 1, said groove being provided on the outer periph cry of the guide, said cover plate being formed from two semi-circular members,

and means on said members for clamping the cover to the guide to permit rotation of the cover plate on the guide.

In testimony whereof I afiix my signature.

LORENTZ EMILTIANSEN.

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