US1375400A - Sailboat-rigging - Google Patents

Description

way of example in Figure 1. A. Y p .trates a modification. The sail-boat illusvis a gunter sail without a gaff.

PAT

FBEDRIKVLJUNGSTRM, oF BREVIK, LiDINGN, s'vvnnaiv'.v

saiLBoAT-RIGGING.

To all whom t may concern Be it known that I, FREDRI'K LJUNG-- sTRM, chief engineer, subject ofthe King of Sweden, residing at Brevik, pLidingn,

Sweden, have invented certain new and usel ful VImprovementsr in Sailboat-Rigging, of which the following is aA specification.

The present invention relates to ajnovel type of rigging for sailingk vessels, which rigging isparticularly applicable to sail-V boats of racing type.

The obj ect o f the invention is to provide a rigging with a reduced number of sails, and the invention consists therein thatthe mast is pivotally connected withthe vhull so that it may be brought-in different positions forward and backward in the longitudinal direction ofthe vessel.

In theA Vaccompanying drawing, an embodiment of a boat provided with a rigging according to the invention is shownby Fig. `2illustrated is provided. withone sail only which On sailing a boat of threordinaryv type having only a main sail or other aft-sail,

the boat will luifnearer Wind, ifl this isnot Y prevented by the helmsman at the tiller.V

less heavily on the' rudder, `particularly when sailing Yin lateral winds', or near.V the 'g' Y formed into a ball 13 where going throughV` `Vthe deck, which latter is reinforced yas shown in the drawing. Of course, journal-move! 'ment may be used as well. Preferably, the

wind, and, aboverall, `when-sailing close to the wind in rough weather. Y

In order to prevent` this, 'thesail' and the influence thereof on the boat are, according to the invention, displaced ahead by inclining the mast forwardly in the longitudinal direction of the boat. The center of gravity and the pressure centers offthe sail are thus displaced forwardly.

Referring to the drawing, the mast 2 of the boat 1 which carries the sail 3 is soV connected with the boat that it Ymay, on sailing, be inclined together with the sail either ahead or astern in the longitudinal direction of the boat. The mast 2 is provided with one or more foreand backstays, 4c and 5 respectively, passing each over a roller 6 and 7 respectively to a rolling device, a windlass .or the like 8 so devised that the one stay or group of stays is rolled onto a drum, simultaneously as the other stay or group of stays is rolled offra second drum.

When there are a number of stays em- Speciicaition of Letters Patent.v Patented Apr. 19', 1921. I

Application mea March s, i92o.fseria1 No. 353,053.

Vployed afore or aft, each stay preferably each forestay 4a, 4b and 4? is wound on a separate drum 8,'8b`and 8, respectively, while'the backstay 5 is wound on a drum- 19, said drums having such diameters that has its own'drum. As shown'inFig. 2

the proper V.lengthsfof the fore 'andback=v erably, thedrums are arranged on the same shaft. To effect anadjustment'of the ten-yV stays are yhauled in kor paid `out so as to f secure a good stretching yof the stays. Pref-2 sion' of the stays, it isalso possible "so to thereto, and it may be disposed either Vinv the 'cockpitfof the boat in the proximity tov f the rudder, or a separate'.wi-ndlassjl 11 may,

with the group ofstays running under deck. I-Iowever, the windlass `11 may be reduced to Vbe combined thesaidplace for instancejP V '80 Y a crank which is connected either mechanif Y cally or in-some other convenient waywith the windlass 8, so ythat fthe'latter may-bef,"

-operatedfrom thecockpit. 1 The windlassY 8v or 11'- respectively is preferably provided with a worm. Y I y. a l y YThe mast 2. is movably arranged in the deck 12 ofthe'boa't, forinstancebvbeing,`

lower end of the mast has Yattached thereto Y one or more rollers 14 running on a curved Y By operating the windlass, the mast 2 Y may be inclined in the-longitudinal direction of the boat, for instanceV toward the stem of it, whereby` the pressure centers aredisplaced from V16 Vto 17.Y As will be seen` from the drawing, aV considerable areaV of the sail is movedY toward the stem by onlyv a slight angulardisplacementY of the mast, and in this way the sail'rnay, when sailing, be adjusted inV accordance with ther by adjusting the position of the mast and? force of the `Wind so as to relieve the rudder of most ofgits load: In 4fact,itWill eveni be possible to sail Without a rudder only the sail. y H By arranging fthe mastaccoifding tothe present invention, a boat may be `sailed vvith A one sail only, preferably an ait-sail corre spondng to `the ordinary main sail. There y fore,` Whilemaintaining the saine area` `of `the sail,rthis single sailmay be taken larger than` usual, or as large as the total; area of the sails oit the ordinary. Atype ot boat as i heretofore usech `For instance, when .the sail i5,

area of a modern 3 0 square meter knockabout-cruiser is divided iiiftivo .sails,ra boat "with al rigging according tothe invention :y has only one sail ivithan area 05.30 square riggingbeeomes f much higher, and conse- A further advantage isaterably should be placed more ahead, thus securing a larger clear space aft of the mast.

l Besides,the further advantage is obtained that the" hoisting and the taking ini of the in the `form as heretofore leinployedbeing l sails is greatly facilitated by thefoniission i "of `a fore-sail. `The novel rigging also considerably facilitates the sailing ofthe boat, all bother about attire-sail and a back` stay i Vhat I 'claim "astneW anddesire Jto-seciire by Letters Patent of the United VStates is l. A riggingforsail beats, characterized i bythe mast with the ,rigging being,adjustable in the longitudinal direction theboat,

y and provided `with an operating device by tion of the the` sail.

means `of which thelniast may, vvhensailing,

y be caused to assume ldifferent slanting positions,'in` order to change thefrelative posipressure center of; thefvvind on ,E p

i "WSWENSWENssoN, 'l

2.- Aaigging as claimed in claim l, characterized,` byY this that the mast is connected with the stein and the stern of the boat by Y Jinean's" `of stays connected with a Windlass in such a Waythat themast may be brought `indifferent slanting positions vby `turning a handvvlieel, a crank or the like.

""3. An embodiment of a rigging according to claim 2, characterized by this that the foresta/y and tliebaclr` stay run' over a roller i arrangedahead and astern respectively, each stayi'unning also oveione oi' two orrmore drums connected with Aone another, said drums being preferably y' arranged on Y the saine` shaft, in? order that^ on Winding home i the ene Lstay or ythe one'group oi' stays, While changing the position ofthe mast,the other stay ori-the other group "o'staysmay Abe vvvound off its `drum in acci-responding de# gree.l y V 4. riggingfas claimed in claimV- 2,=c`har acterized bythe provision' of a plurality of y forel stays, each of which is connected `With a separateD 'drum'i i 5. fAnenibodiment" of an arrangement `according Vtel claim 2," characterized by the Windlass beingsodisposed astobe operated 'from the cockpitl of the 'sail-boat@ 6i An einbodirnent'of arigging accord` ingfto 'claim lgcharacterized by. this that thefniastis connectedwith the hull`,prei5erA ably vvith vtlie'de'ck of'V the boat, by means of l a socket-j hint'4 connection,

r. A rigging asclaimed in` claim 6, char@` acterizedbytthe lowerfeiid of the-mast cooperating with the hullby means-of a guidving device adapted' to Aguide the mast rela- "tively'to tliehull. f f' y ln testmonygvvhereof I ahx'niy signature in presence otyvo'vvitnesses.

" FREDRIK 'LJ-UNGSTRQM,

Vitnesses: 'i We i T, H. BE eRoTH, f

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