US1433346A - Tackle block - Google Patents

Description

0'. H. M. DORNTE. TACKLE BLOCIS, APPLICATION FILED JULY 20.1920.

1 33k 34 Pwwmm (M. m 1922..

1 992 lbi f- C. H. M. DORNTE.

TACKLE BLOCK. APPLICATION FILED JULY 20. 1920.

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Application near July at, 1920. Serial no. serene.

(GRANTED UNDER THE PROVISIQNS Ol? THE ACT fill? llililtfiltl 3,1921, 4:1 It, 1313.)

To all whom it may concern:

Be it known that l, Carin Hninnrorr Mars Donn'rn, citizen. of the German Republic,

residing at No. 11 Branerlrnechtsgraben, Hamburg, Germany, have invented new and userul Improvements 1n lackle Blocks (tor whlch I have filed applications in Germany February 2, 1914, patented March 10, 1.921,

Number 334139, and Great Britain February 13, l914,patented July 23, 1914:, Number 3823'), of which the following is a speci+ fication.

This invention relates to tackle blocks and in particular to tackle blocks havingmulti ple sheaves and being principally designed for use in lowering life boats. It is the ob ject 01 my invention to provide a tackle block of an improved structure, in which the rope lines pass through individual guides provided above each sheave, said guides thus effectively preventtilting of the block. A further object of my invention is to provide an improved vform of: guide. A. still further object of my invention isto provide for said guides a carrying member of an improved structure. A still further object of my invention is to provide for simply and effec tively securing said guide bars within the casing of the block; A still further object of my invention is tomount said guide carrying member intermediate the side plates of each sheave, and to secure the same by the same means by which the plates are fastened to each other, my novel rope line guiding means being especially adapted to be attached to and employed in conjunction with ordinary old tackle blockswhether the same be made of wood or iron.

With these and other objects in view I have illustrated some practical embodiments of my invention, by way of example, in the accompanying drawings, it beingunderstood that the same, or parts thereof, are susceptible to modifications such as will readily suggest themselves to those skilled in the art to which this invention appertains, without thereby involving a departure from the scope of my invention. lln the drawings Fig. 1 is a front elevation of a tackle block, furnished with my invention, Fig. 2 showing a side view, and Fig. 3 a plan view of the same. ln Fig. 4: l have illustrated, in

front elevation, a wooden. block equipped with my invention, while Fig. 5 is a side view, and 6 a top view off-I the same. .Reterring to the drawings the sheaves a, which may be provided with suitable bearings, such roller bearings, are revolubly mounted ona transverse pin 0 which passes through the covering plates (3 and both parallel extending legs oi? each of the stirrups (Z and c, the covering plates 0 beingsecured to the legs of the outer stirrup d; The covering plates 0 on either side are interconnected by means of screw threaded bolts f which also pass through intermediate plates 9 provided on either side of the legs of theiinner'stirrup e. The bolts f pass through, and support, distancing pieces or sockets h extending between each two adjacent plates 0, c, and g, g. The bolts 7 in the top part of the block support the bars h.- which in the illustrated embodiment of my inventionoccupy the place of the outer pair of sockets A only the median sockets it being employed. still for distancing the plates gvrelatively to each other. These median sockets 7t on the upper transverse bolts, too, may be dispensed with in favour oi? a third bar. it placed there instead, so that then, a bar it provided over each sheave em ployed in the block. Each bar it is provided with a passage i for a rope line, the

rope being thereby-effectively guided and thus prevents the dischargeblock from tilting and getting into disorder, The said passage i may consist of a hole bored through the bar 7%. ll. prefer to line the passages 2' by means of special guide pieces or sockets 7:: which may be made of wood, lignum vitae, fibre, or the like. The sockets 7c are preferably provided with, a circumferential contraction into which the respective bar it enters for the purpose of fixedly holding the sockets. I prefer to compose each bar it of halvesclamped together he tween the walls of theblock by means of the above mentioned bolts 7 the plane of section extending lengthwise of the bar. Both ends of each bar it" are suitably curved to embrace the respective socket 7a by entering into the contracted portion of the socket which is thus secured in place through the clamping action of the bolts 7. No further fastening means are required for the sockets 7c.

The central passage of each socket is is of such a form and finish as to prevent any damage to the rope line passing therethrough.

The Wooden tackle block shown in Figures 4 to 6, is of a similar construction and assembled in the same manner as the tackle block hereinbefore described; except that'the inner stirrup is duplicated for apparent reasons. The sockets h as well as the rope guiding bars 7L are similar to those described in connection with the iron tackle block illustrated in Figures 1 to 3. I prefer to give the sockets 72/ a cylindrical form and to. provide ample space between two par-ah lcl disposed sockets in order to prevent water and moisture from accumulating in contact therewith, and to provide :01- an unobstructed access of air. Making the median sockets h of fibre secures the advantage that the sockets will notbe liable to shrink or otherwise alter its form in consequence of alteration in the atmosphere.

If it is desired to equip an old tackle block with my novel rope guiding bars, this may be accomplished by removing the distancing sockets at the top of the block and substituting the rope guiding bars h therefor, which may be secured in place by means of the old screw threaded bolts or rivets.

Safety blocks hitherto known having a guide plate above the middle sheave, require the provision. of special fastening means for the guide plate which is not adapted to allow of being readily attached to old tackle blocks.

In the illustrated block constructions, the eye forethe swivel which engages the hook that is to be connected to the lite boat, is

formed by the curved portions of the stirrup d and 'e'.

-What I claim as my invention and desire to secure by Letters Patent of the United States of. America, is

1. A tackle block, comprising in combination, at least one revoluble sheave, side plates for said sheave, a member above said shea\ e and composed of lengthwise extending halves, said member being mounted between said side plates, apertured structures one at each end of said. bar and adapted to receive and guide a rope line o'li said sheave, said structures being secured in place between said halves of said member.

.2. A tackle block, comprising, in combination, at least one revoluble sheave, side plates on either side of said sheave, transversely extending fastening means for said side plates, a member disposed above said sheave and. consisting of lengthwise extending halves, said member being mounted be.- tween said side. plates and secured in place. by means of said fastening means. :ipcrtured structures one at each end ol' said member and adapted to receive and guide a ropeline of said sheave, said structures bein; held in place between said halves of said member.

tackle block, comprising, in combination, a plurality oi revoluble sh #aves, side plates on either side of said sheaves, transversely extending fastening means for said side plates, individual meml'iers above at least two of said sheaves, each member con sisting ol lengthwise extending halves. said halves being mounted between the said side. plates of the associated sheave and b means of said fastening means, aperturcd struc tures one iror each end of each of said members and adapted to receive and guide a rope line of the associated sheave, and a contraction on each of said structures and adapted to receive the respective ends of the. associated member, whereby said structures are held in place through said fastening means acting upon said halves of said members.

In testimony whereof I have signed my name to this specification in the presence of: two subscribing witnesses.

CARL HEINRICH MAX DbRNTE.

Wi tnesses 7 mnnnron J ULIUS .POIHO \VILIIE M BREUXINGER.

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