US279985A

US279985A - Guide for sail-rigging

Info

Publication number: US279985A
Authority: US
Publication date: 1883-06-26
Anticipated expiration: 1900-06-26

Description

2 Sheets-Sheet 1.

(No Model.)

J. W. SHARBETT. GUIDE FOR SAIL RIGGING.

Patented June 26, 1883.

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4 1M (9 I Witnesses. u [12 wanton- I aw ,hflwai (Ea- Miudiel.) I 26 Smezets slfweii 2a J. SEA BRETT;

GUIDE FQB; SAIL EIGGING. N0. 2729,9851 Patented June 26, 1883.;

[72 went f 92cm 2 UNITED STATES.

AIENT trier...

JOHN IV. SHARRETT, OF PORTSMOUTH, VIRGINIA.

GUIDE FOR 'SAIL-RIGGING.

SPECIFICATION forming part or Letters Patent No. 279,985, dated June 26, 1883. Application fil'ed October 3, 1882. (No model.)

To all whom it may concern:

Be it known that 1, JOHN W. SHARnnrr', a citizen of the United States, residing at Portsmouth, in the county of Norfolk and State of Virginia, have invented a new and useful Improvement in Guides for Sail-Rigging, of which the following is a specification.

My invention relates to improvements in rigging-blocks, in which, instead of the circular sheave or pulley, I use a number of guiderollers arranged in a semicircle or segment of a circle, which rollers so arrangedoccupy but one-half the space required by the old sheave or pulley, while the cost of the blocks 'will be reduced.

In the accompanying drawings, Figure 1 is an elevation of one of my improved blocks with rope around its rollers, and represented as riding upon a spar or yard-arm, the latter being shown in section. Fig. 2 is a bottom viewof the same,having' its rope shown in section. Fig. 3 is an elevation of a deck-block constructed with guide-rollers, and shown swinging on a pivot in a stationary frame or stand. Fig. 4 is a top view of the same. Fig. 5 is a longitudinal section of a spar having one of my improved blocks inserted therein. Fig. 6 is a top view of the same. Fig. 7 is a top view of a deck-block similar to that shown in Fig. 3, but having a double set of. semicircularlyarranged guide-rollers. Fig. 8 is a perspective view of one of the checks or outer portions of said block. Fig. 9 is a perspective View of the inner or partition plate of the same. 'Fig. 10 is an elevation of a traveling block with guide-rollers, and adapted to move on a guide-rail, which is shown in section. In

this view a portion of the casing or shell of the block is broken away and the exposed rollers shown in section. Fig. 11 is a top view of the same, and Fig. 12 is a vertical .section of the same in the line w w of Fig. 11.

' Similar letters refer to similar parts throughout the several views.

The block A in Figs. 1 and 2 consists of a divided shell, 01. a, of semicircular form, and a number of. rollers, B, fastened between said shell by means of their shafts b, and arranged in a semicircular curve as shown. The shell a a may be of open or closed or partly open and closed construction, as circumstances may require,

'thus a chance are formed with shoulders.

used for operating the sails.

be protected against the In Figs. 1 and 2 the cheeks or parts a a of the shell are shown as being formed with a curved rim, (1.", whereby the back or outer side of the block is closed up, and whereby also the parts a a are kept at a proper distance from each other. This construction of blocks is adapted specially for use on spars, upon which the blocks are made to ride, as illustrated in the draWings -Fig. 1, wherein the spar O is shown in cross-section; and thus applied the block may rock and yield to the inclination of the rope or brail passing through it, or it may be moved longitudinally upon the spar to be placed in the mostadvantageous position for the operation of the brail.

In Fig. 3 the block A is shown pivoted at b, by one of the roller'shafts, to a stationary stand, D, on the deck of the ship, and it has to swing freely to either side in following the boom, which is tacked by. this means instead of by the old traveler-block.

The checks or parts a a of this block (shown in Figs. 3 and 4.) are formedat top with ears a, which bear against each other and serve as stays for keeping the cheeks a a at a proper distance from each other. In Fig. 5 the checks or parts a a, are shown as held separate by means of stays a, of ordinary construction. These might be dispensed with if the pins 1) This block, provided with rollers B, is permanently fastened into the end of a spar, E, in alongitudinal position, and itholds or guides the ropes or sheets The lower side of the spar E may cutting action of the rope by metal thimbles or ferrules F.

I In cases where it becomes necessary to use more than one semicircular set of rollers B,-

they may be arranged side by side, as are the circular sheaves in the ordinary blocks, or as represented in Fig. 7, one set of shafts, b, answering for the two, or several sets of rollers B. In this block, Fig. 7, a middle part or partition, a is used in conjunction with the cheeks or outer parts, a a, of the block, and this middle part, a is provided with ears of on either side, which are constructed to meet the ears a of the outer parts, a a, as shown in Figs. 7, 8, and 9.

For the ordinary traveling block' used in tacking the boom I substitute a block, A, as

shown in Figs. 1o, 11, and 12, provided with the rollers B; This block is provided with a central-aperture; G, by means of which it travels'uPon a rail or rod, H. (Shown in sec tioninFig. 10 The respective parts a (if a T of the shell or casing are in this block provided with an innerriin a? whereb the a erture G is formed and the parts "arekept'a' proper-distanceapart from each other. In

all'ef the above-described constructions the; shafts bof the rollers B are vpassed through theshells or casings of the blocks and riveted at their "ends; but, if desired, the shafts may be provided with suitable shoulders-orstops, in order 'to assist the rims a or ears a in keeping the parts of theshells at aproper distance from one; another, as described. In'lieu of the riveted ends of shafts b, other suitable means of fastening may be adopted, such as screw-threaded ends and nuts or key-pins, as deemed most advisable.

The construction of a block with a semicircularly-arranged series of small guide-rollers has important advantages over the use of one sheave, inasmuch as it does' away with the heavy side wear encountered with the one adapted to its various uses than the-ordinary 2" l erases:

ends to flat segmental plates, and such rollers 3 5 and platesibeing applied to the spar in such a manner asto admit the sail rolling inside be-' tween the spar andthe rollers, as described and represented in said patent. I also am aware of Letters Patent No. 179,126,- which represents an ordinarystyle of singleor double pulley-block with a peculiarlyconstructed frame, and therefore I- do not claim anything shown in said patent; but a What I do claim as my invention, and desire to secure by Letters Patent, is

1. The combination of guide-rollers having concave peripheries, and arranged in a-seg ment of a circle, with a rigging-block shell, A, provided with a passage between the rollers and the outer inclosing portion of the shell,

through which the rope or brail passes, substantiallyas and for the purpose described. 2. The combination of sets of guide-rollers having concave peripheries and riveting-axles, and arranged in segments of circles, with a rigging-block-shell, A,consisting of the seetionsfa a/ if, having cars a, whereby a double block with a passage between the rollers and the ears (1* for the rope or brail is formed, and said sections are kept at the proper distance from each other when riveted together by the axles of the rollers substantially as described.

J OHN W. SHARRETT.

- Witnesses: p V

J o'HN W. SHARRETT, Jr.,

WILLIAM W. Rorrms.