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Publication numberUS3678876 A
Publication typeGrant
Publication dateJul 25, 1972
Filing dateFeb 16, 1971
Priority dateFeb 16, 1971
Publication numberUS 3678876 A, US 3678876A, US-A-3678876, US3678876 A, US3678876A
InventorsHobart L Alter
Original AssigneeCoast Catamaran Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Jib sheet apparatus for sailboats
US 3678876 A
Abstract
A jib sheet apparatus for a sailboat that includes a pair of cleat-block units mounted on opposite sides of the sailboat. Each cleat-block unit is tiltably resiliently supported above its mounting point on the boat. A jib sheet has its opposite ends dead-ended on the cleat-block units, with the bight portions of the jib sheet travelling through such units and being releasably secured to such units by the cleat member thereof.
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Description  (OCR text may contain errors)

[ 1 July 25, 1972 United States Patent Alter [56] References Cited UNITED STATES PATENTS [54] JIB SHEET APPARATUS FOR SAILBOATS Roberts et ...1 14/218 UX [72] Inventor: Hobart L. Alter, Capistrano Beach, Calif.

2,978,217 4/1961 Gunderson....................,....248/160X [73] Assignee: Coast Catamaran Corporation, San Juan Capistrano, Calif.

Feb. 16, 1971 Primary ExaminerTrygve M. Blix Arwrne vFu1wider, Patton. Rieber, Lee & Utecht [22] Filed:

[57] ABSTRACT A jib sheet apparatus for a sailboat that includes a pair of cleat-block units mounted on opposite sides of the sailboat. Each cleat-block unit is tiltably resiliently supported above its Appl. No.:

[52] US. Cl. 14/102, 24/134 CP, 114/218 mounting point on the boat. A jib sheet has its opposite ends dead-ended on the cleat-block units, with the bight portions of the jib sheet travelling through such units and being releasably secured to such units by the cleat member thereof.

2 N0 1 %.l w 4 0 W 1 b2 3.. 6] BH 4 [51] lnt.Cl. [58] FieldolSearch...........1......

24/134 P, 134 CP;248/51, 160

10 Claims, 8 Drawing Figures Patented Jul 25, 1972 BEST AVAILABLE COPY 3,678,876

2 Sheets-Sheet 1 A W F INVENTOR. Harmer L. A 75:? BY m M J J g5 MM flrmexvsys Patented July 25, 1972 358? AVAILABLE COPY 3,678,876

2 Sheets-Sheet 2 INVENTOR. Hos/927 L #4 TEE JIB SHEET APPARATUS FOR SAILBOATS BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to the art of sailing and more particularly to improve jib sheet apparatus for sailboats.

2. Description of the Prior Art Known jib sheet block arrangements for small sailboats, and particularly catamarans, are cluttered, complex and generally inadequate to withstand the heavy loads applied by a jib sheet in heavy winds. Additionally, it is difficult to secure and release the jib sheet when making a tack. This is especially true when the crewman handling the jib sheet is riding in a trapeze.

SUMMARY OF THE INVENTION It is a major object of the present invention to provide a jib sheet apparatus for sailboats which is of compact yet rugged construction and which permits the jib sheet to lead at the proper angle during all conditions of sailing, and additionally makes it simple to secure and release such jib sheet as during a tack.

Other objects and advantages of the present invention will become apparent from the following detailed description, when taken in conjunction with the appended drawings.

DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a preferred form of a jib sheet apparatus embodying the present invention with the jib sheet appearing in a released position;

FIG. 2 is a view similar to FIG. 1, but showing the jib sheet in a secured position;

FIG. 3 is a side elevational view of a cleat-block unit of said jib sheet apparatus;

FIG. 4 is a sectional view taken along line 44 of FIG. 3;

FIG. 5 is a perspective view of said jib sheet block apparatus embodying the present invention mounted on a Catamaran sailboat; and

FIGS. 6, 7 and 8 are top plan views of said sailboat showing the operation of said jib sheet block apparatus during a tack.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings, a preferred form of jib sheet apparatus embodying the present invention is shown mounted on a conventional catamaran sailboat S. Such apparatus includes a pair of like cleat-block units C-1 and C-2 carried on a pair of traveler tracks 10 and 12 mounted on opposite sides of the front cross-piece of the catamaran S. A continuous rope jib sheet 14 extends between the cleat-block units C-1 and C-2 and a pair of conventional blocks 16 and 18 carried by the clew of jib said 20 of catamaran S.

Each cleat-block units includes a bifurcated housing, generally designated 30, having a pair of side walls 32 and 34, with the upper portion of such side walls extending generally upwardly and rearwardly relative to the lower portion of such side walls. The upper end of each side wall is intregally formed with generally horizontal extending ear 36 and 38 respectively. A generally U-shaped bracket 40 is secured to the outer surfaces of the lower portion of the housing side walls 32 and 34 rivets 42. A horizontal pivot pin 44 extends through the upper ends of bracket 40 and the mid-portion of the housing side walls to rotatably support a sheave 46. A horizontally extending pin 48 extends across the upper portion of the housing side walls between aligned bores formed in such walls to define an anchor for the dead ends of the jib sheet 14.

A conventional cam cleat, generally designated 50, is rigidly affixed to the underside of the afore-described ears 36 and 38 by a pair of bolt and nut assemblies 52 and 54. The cam cleat 50 includes a pair of like jaws 56 and 58 provided with opposed teeth 60 that releasably grip the bight portion of the jib sheet 14, such jaws being spring-loaded towards one another.

A generally U-shaped jib sheet guide 62 is affixed to the lower end of the bolt and nut assemblies 52 and 54 and the bight portion of the jib sheet 14 extends therethrough.

The cam cleat units 01 and C-2 are supported above a pair of like, conventional deck mounts such as cars 66 and 68. Cars 66 and 68 are slidably carried by a pair of traveler tracks 70 and 72 secured to the opposite sides of the front cross-piece 74 of catamaran S. Tracks 70 and 72 are formed with a plurality of adjustment bores 76 that selectively receive a springloaded stop 78 carried by each of the cars. Cam cleat units C-1 and G2 are each resiliently supported above their cars by means of a coil spring 80 having its lower and upper ends seated upon a pair of vertically aligned cups 82 and 84, as shown particularly in FIG. 3. The upper cup 82 is provided with a depending eye 86 which movably interlocks with a complementary upstanding eye 88 having its lower end affixed to the lower cup 84. Eyes 86 and 88 transfer tension from the cleat-blocks to their respective cars. The upper cup 82 is pivotally attached to the web of the bracket 40 by means of an upward extension of the eye 86 so that housing 30 may freely swivel relative to its respective car about a vertical axis. The lower cup 84 is rigidly affixed to the end of car 66 opposite stop 78 by peening over the lower ends of such eye in complementary bores 90 formed in car 66. With this arrangement, each housing 30 is tiltably resiliently supported in a generally vertical position.

As indicated particularly in FIGS. 1, 2 and 5, one end of jib sheet 14 is dead-ended to the anchor pin 48 of cam cleat unit C-l. From this point the jib sheet extends upwardly and forwardly through block 16 secured to a ring 92 attached to the clew of jib sail 20. The jib sheet 14 then extends downwardly and rearwardly through sheave 46 of cam cleat unit C-1 and then across the trampoline 94 of catamaran S and through the rear end of the other cam cleat unit C-2. From cam cleat C-2 the jib sheet then extends forwardly and upwardly through the block 18 secured to ring 92 of the clew of jib sail 20. Finally, the jib sheet extends from block 18 to the anchor pin 46 of cleat-block unit C-2.

In the operation of the afore-described jib sheet apparatus, the cars 66 and 68 will be set at the desired lateral adjustment relative to their traveler tracks 10 and 12 by means of stops 78. Referring now to FIG. 6, assuming the catamaran S is innitially sailing on a port tack. the port lead of the jib sheet 14 will be free relative to the cam cleat of port cleat-block unit C- 2, while the starboard lead of the jib sheet will be secured in its desired position by engagement with the jaws of the cam cleat of the starboard cleat-block unit C-2.

Referring now to FIG. 7, the catamaran S is shown traveling through the eye of the wind as it changes course from a port tack to a starboard tack. During such change in heading, the helmsman and the crewman 102 will move across the trampoline from the port side thereof to the starboard side thereof. It should be noted that inasmuch as the jib sheet 14 defines a complete loop, the bight portion thereof aft of the cleat-block units may be continuously held by the crewman 102 as he changes positions from one side of the boat to the other, his hands sliding over the jib sheet. Immediately before beginning his movement across the trampoline from the port side thereof to the starboard side thereof, the crewman may release the jib sheet from the cleat-block unit C-l. Alternatively, he may delay such release until the boat has started to tack so as to momentarily back-wind the jib and thereby assist in bringing the boat about.

Upon reaching the opposite or starboard side of the trampoline the crewman 102 may immediately secure the jib sheet at the desired point for obtaining the proper angle of the jib 20, as indicated in FIG. 8, the boat S in this figure being shown after it has completed the tack. It should be further noted that the yieldably tiltable and swivelling mounting of the cleatblock units permit them to swivel and lean at the exact angle required by the position of the clew of the jib relative to such cleat block units.

It should be particularly noted that the aforedescribed jib sheet apparatus is particularly useful where the sailboat is provided with a trapeze for crewman 102 because'the jib sheet" can be readily released and resecured relative to the cleatblock units even while the crewman is hanging from the trapeze. It should also be noted that the housings 30 may be formed with a plurality of aligned bores 48a and 48b to selectively receive the ends of pin 48 to thereby vary the angle assumed by the cleatblock units. Additionally, wedges (not shown) may be interposed between ears 36 and 38 and their respective cam cleats 50 to accomplish the same purpose.

Various modifications and changes may be made with respect to the foregoing detailed description without departing from the spirit of the present invention.

Iclaim:

1. Jib sheet apparatus for controlling the jib sail of a sailboat, comprising:

a pair of like cleat-block units, each including a housing that carries a sheave and a cam cleat;

deck mount means on said sailboat for each of said cleatblock units;

a jib sheet extending through said housing and the sheave and cam cleats thereof; and

connection means interposed between each of said housings and its respective deck mount means that tiltably resiliently support each said housing in a generally vertically extending position to receive said jib sheet while permitting said housing to swivel about a vertical axis under the influence of said jib sheet.

2. Jib sheet apparatus as set forth in claim 1 wherein said apparatus includes a pair of traveler tracks secured to opposite sides of said sailboats, and said deck mount means includes a pair of cars adjustably slidably carried by a respective traveler track.

3. Jib sheet apparatus as set forth in claim 1 wherein each of said connection means includes upper and lower spring support elements, a spring interposed therebetween, a rigid connection between said lower spring support element, and a swivel connection between said upper spring support element and its respective housing.

4. Jib sheet apparatus as set forth in claim 1 wherein said apparatus further includes block means on the clew of said jib sail, and said cleat-block units are each provided with an anchor pin that receives the dead-ends of said jib sheet, with said jib sheets extending from said anchor pins through said 5. Jib sheet apparatus as set forth in claim 2 wherein each of said connection means includes upper and lower spring support elements, a spring interposed therebetween, a rigid con nection between said lower spring support element, and a swivel connection between said upper spring support element and its respective housing.

6. Jib sheet apparatus as set forth in claim 2 wherein said apparatus further includes block means on the clew of said jib sail, and said cleat-block units are each provided with an anchor pin that receive the dead-ends of said jib sheet, with said jib sheets extending from said anchor pins through said block means and then back through the sheaves and cam cleats of said cleat-block units.

7. Jib sheet apparatus as set forth in claim 3 wherein said apparatus further includes block means on the clew of said jib sail, and said cleat-block units are each provided with an anchor pin that receive the dead-ends of said jib sheet, with said jib sheets extending from said anchor pins through said block means and then back through the sheaves and cam cleats of said cleat-block units.

8. Jib sheet apparatus as set forth in claim 3 wherein said spring support elements are cups, said spring is of the coil type having its upper and lower ends seated in said cups, and said cups are provided with interlocked eyes to transfer tension between said cups while permitting relative tilting therebetween.

9. Jib sheet apparatus as set forth in claim 8 wherein said apparatus includes a pair of traveler tracks secured to opposite sides of said sailboat, and said deck mount means includes a pair of cars adjustably slidably carried by a respective traveler track.

10. Jib sheet apparatus as set forth in claim 9 wherein said apparatus further includes block means on the clew of said jib sail, and said cleat-block units are each provided with an anchor pin that receive the dead-ends of said jib sheet, with said jib sheets extending from said anchor pins through said block means and then back through the sheaves and cam cleats of said cleat-block units.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2627834 *Oct 5, 1948Feb 10, 1953Hugh Duffy CCam cleat
US2978217 *Nov 19, 1958Apr 4, 1961Gunderson Ralph RYielding support for vehicle hose lines
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3875889 *Apr 11, 1974Apr 8, 1975Samuel RobbinsSailboat traveler apparatus
US3898948 *Jun 24, 1974Aug 12, 1975Huff Thomas RMast handling
US3985092 *Mar 28, 1975Oct 12, 1976Mark L. RobbinsSailboat traveler apparatus
US4059063 *Aug 30, 1976Nov 22, 1977Hood Sailmakers, Inc.Roll-furling mainsail
US4080917 *May 2, 1977Mar 28, 1978Coast Catamaran CorporationRoller furling mechanism
US4147122 *Oct 11, 1977Apr 3, 1979Schaefer Marine ProductsDeck cleat
US4262616 *Dec 26, 1978Apr 21, 1981IsomatSailing-boat mast
US4325537 *Nov 8, 1979Apr 20, 1982Merriman Holbrook, Inc.Snatch block
US4399979 *Jan 19, 1979Aug 23, 1983Adelman Michael RDevice for self-tailing a conventional winch drum
US4651668 *Sep 30, 1985Mar 24, 1987Melrose Robert GTraveller control for sailcraft
US4718371 *Jul 14, 1986Jan 12, 1988Vanguard, Inc.Resilient support for yacht fitting
US4719869 *Nov 6, 1986Jan 19, 1988Vanguard, Inc.Sailboat traveler car assembly with removable block
US4834016 *Dec 7, 1987May 30, 1989Alexander Manufacturing & Service Co., Inc.Liferaft launch system
US4843687 *Jan 17, 1989Jul 4, 1989Kroepelin Jr Willis FFor securing under tension
US5188052 *Feb 15, 1991Feb 23, 1993Breuer Rudi ATransporter unit for adjusting a genoa lead block and car
US5327845 *Nov 3, 1992Jul 12, 1994Peter CookApparatus for fastening and adjusting a line
US5327847 *May 14, 1993Jul 12, 1994Peter CookApparatus for fastening and adjusting a line
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US5485800 *Apr 13, 1994Jan 23, 1996Harken, Inc.Resilient stand-up device for bearing block
US6990916Dec 13, 2004Jan 31, 2006Atwood Jr Rex ESailboat mast stepping system
US7980798May 26, 2009Jul 19, 2011Adac Plastics, Inc.Tie-down assembly
USRE35965 *Jul 9, 1996Nov 24, 1998Cook; PeterApparatus for fastening and adjusting a line
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EP0795465A1 *Feb 5, 1997Sep 17, 1997Rainer TiigiCleat for sailboats
Classifications
U.S. Classification114/102.19, 114/218, 114/204, 24/134.00P, D12/304
International ClassificationB63H9/10
Cooperative ClassificationB63H2009/088, B63H9/10
European ClassificationB63H9/10