US1832782A - Dock-strut or stay - Google Patents

Description

Nov. 17, 1931'.

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P. E. LEUPEN DOCK STRUT 0RV STAY Filed May ZB, 1930 2 Sheets-Sheet l Petrus Ellen/ben Nav. 17, 1931.

P. E. LEUPEN 1,832,782

DOCK STRUT OR STAY Filed May 25, 1930 2 Sheets-5h68! 2 FIGS.

Il 'w- ,Eve/piaf.'- Era SEI/e u/ven Patented Nov. V17, 1931 UNITED STATES PATENT OFFICE PETRUS E. LEU'PEN, OF AMSTERDAM, NETHERLANDS, ASSIGNOR TO NEDERLANDSCHE DOK-MAATSCHAPPIJ N. V., OF AMSTERDAM, NETHERLANDS, A COMPANY F THE NETHERLANDS noox-sTRUT on STAY Application led May 28, 1930, Serial No. 456,667, and in the Netherlands June 1, 1929.

The use of wooden dock-struts or dockstays causes considerable expenses, primarily because it is necessary to keep a large stock with a view to the necessity of disposing of 51 a great variety of lengths. Furthermore, the

struts must often be renewed, because of theirl heads putrefying, whereas the transport of the stays to and from the storehouse takes up much time.

In accordance with the invention, the dockstrut is of iron and telescoping, so that it can be adjusted to the required length in accordance with the Width of the vessel to be docked. This adjustment is preferably effected by means of a cross-pin cooperating with holes, of which each strut part is provided, the pitch of the holes in the one part being, however, different from that in the other part, so that, notwithstanding the considerable distance that must be necessarily be left between adjacent holes, a fine adjustment of the total length of the stay can be obtained.

The tubular or outer part of the stay is preferably provided with a series of eyes, or with a section iron rivetted thereto and having a series of holes, or with a plurality of such section irons, or with a strap having a hook or an eye and adapted to be clamped in the required position to said outer part, or with any other suitable element allowing the stay to be engaged by the rope of a crane so as to assume a substantially horizontal position when freely suspended. It will be understood that the centre of gravity of the stay will be shifted when the length of the stay is varied. As it is desired to keep the stay in a substantially horizontal position, it is necessary to engage it vertically above its centre of gravity. By the provision of a plurality of eyes for the engagement of the load hook of the crane, or for the provision of D- shackles, it is possible to determine, for each adjusted length of the stay, the suitable point where the stay should be engaged by the load hook, so that the stay will be in equilibrium when being hoisted.

One end of the stay may be provided with a screw jack, so as to avoid the necessity of using wedges.

The'fdrawings illustrate, by way of exa-mple, two embodiments of the invention.

Fig. l1 is a side elevational view of the stay having its minimum length, and

. Fig.2 is a plan view thereof.

Fig. 3 shows the stay having its maximum length, the outer end of the inner part being broken a-wayand the end of the outer part `being provided with a screw jack. l

Fig. l is a cross-section along the line IV-IV in Fig. 3, on an enlarged scale.

Fig. 5 illustrates how the novel dock-stays are used.

The outer part of the dock-stay extends from a to b, the inner part from 0 to d.

The outer part essentially comprises two channels 6 interconnected by strips 7, U-irons 8 and Vangles 9, so that its inner walls are entirely smooth. Secured to it atthe end b (Figs. l and 2)` is a wooden block 10 adapted to be engaged by wedges 11, when the stay is in operation.

The inner part c--d essentially consists of two channel irons 12 arranged with their flanges towards one another. Rivetted to the inner faces of the flanges are the ish plates 13. The rivets are countersunk in the beams 12, so that the inner part has smooth outer walls from c to cl. At the end d, the beams are bent inward, whereby the introduction of part c-d into the part a-b is facilitated. The beams ,6 may be normal sections. The beams 12 should have a slightly lower section to prevent them from jamming in the outer part. Said beams may suitably be bent from strips. At the end o, a head 14: is pivoted to the inner part by means of a pin 15, so that the wooden bearing block 16 can adjust itself to the ships side.

To the angle 17 is secured a D-shackle 18 adapted to be engaged by a steel rope 19, by which the stay can be suspended from the ship (see Fig.

The flanges of the channels 6 of the outer part are provided with series of registering holes 20. At the end d of the inner part, there are only two pairs of holes 21 spaced apart a distance equal to one half of the pitch of the holes 20. A cross connecting pin 22 is adapted to be passed through the holes 2O and 2l. By providing the part o d With say four sets of holes spaced apart at unequal distances all smaller than the pitch of holes 20, it is possible to still more accurately adjust the length of the stay.

Rivetted to the outer part are two angles 23 having a series of holes 24 therein. These holes are adapted to receive D-shaclles 25 for fastening a strap adapted to be engaged by the load hook of the crane. If the stay has its minimum length, it Will, when being suspended from the crane, assume a horizontal position if the D-shaclles 25 engage the holes 24 to the extreme right, see Figs. 1 and 2. lf the stay has its maximum length, (Fig. 3) ,the D-shackles 25 should engage the holes 24 to the extreme left in order that the stay be horizontal when suspended (Fig. By placing the one D-shackle Q5 in one hole of the one angle 23 and the second D-shackle in the next hole of the other angle 23, the point of engagement by the load hook may be varied by a length equal to only one half of the pitch of holes 24, although it does not matter very much Whether the stay, freely suspended from the cra-ne, assumes a somewhat inclined position, because the rope 19 allows of the correct position to be easily obtained.

In accordance with Fig. 3, the block Z) is secured to the head of a screw jack 27, the nut of which is adapted to be rotated by means of a ratchet 29, whereby the same effeet can be obtained as with the Wedges 11.

rIubular doclr stays in accordance with the invention can be made to aii'ord great strength and are more reliable than are vvooden struts. It is, therefore, possible to hold a vessel in equilibrium with a relatively small number of iron stays. The positioning and the removal of the stays takes, therefore, very little time and When the vessel is to be repaired, said stays are not so in a mans Way than are the great number of Wooden stays that would otherwise have to be used.

Vhat I claim is An adjustable multi-part dock stay, one part being adapted for sliding movement within another part, a cross-pin interconnecting both parts, and at least one bar connected to the second part, the said bar being provided With a number of hoisting-holes, the first and the last hole of Which are situated near the centres of gravity of the doel; stay when it is adjusted respectively to its minimum length and to its maximum length.

1n testimony whereof I my signature.

PETRUS E. LEUPEN.

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