CA1105330A - Sail assembly - Google Patents
Sail assemblyInfo
- Publication number
- CA1105330A CA1105330A CA333,359A CA333359A CA1105330A CA 1105330 A CA1105330 A CA 1105330A CA 333359 A CA333359 A CA 333359A CA 1105330 A CA1105330 A CA 1105330A
- Authority
- CA
- Canada
- Prior art keywords
- sail
- mast
- brace
- spars
- foot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Abstract
ABSTRACT OF THE DISCLOSURE
SAIL ASSEMBLY
A skate sail is rigged with leading edge spars set by manipulation of a cruciform frame. The sail and frame assembly is suitable for mounting on a boat or vehicle as well as for being hand held, and is collapsible for compact stowing. When provided with a cinch line the sail assembly can be used for hang gliding. Rigging is set by joining separable lengths of a mast and advancing a transverse brace along the mast toward the mast head to deploy by toggle-like action head spars to which the sail is lashed thereby spreading and drawing taut a trapezium configuration of sail foil which is anchored to the foot of the mast. Laterally extendable wings may be provided and deployed separately to provide troughs which catch air spilling from the main sail foil and eas handling of the sail and enhance the ability of a user to trim the sail readily.
SAIL ASSEMBLY
A skate sail is rigged with leading edge spars set by manipulation of a cruciform frame. The sail and frame assembly is suitable for mounting on a boat or vehicle as well as for being hand held, and is collapsible for compact stowing. When provided with a cinch line the sail assembly can be used for hang gliding. Rigging is set by joining separable lengths of a mast and advancing a transverse brace along the mast toward the mast head to deploy by toggle-like action head spars to which the sail is lashed thereby spreading and drawing taut a trapezium configuration of sail foil which is anchored to the foot of the mast. Laterally extendable wings may be provided and deployed separately to provide troughs which catch air spilling from the main sail foil and eas handling of the sail and enhance the ability of a user to trim the sail readily.
Description
~1(1 5330 BACKGROUND OF ~HE INVENTION
Portable frame-and-sail assemblies are widely used for skate sailing and hang gliding, and are also used for small boat, iceboab and land vehicle sailing. Such assemblies characteristically comprise a multiple number of full width spars, i.e. one at the leading edge, one near the lift center for being mannually grasped, and sometimes one at the *oot of the sail. Unlike kites, parachutes or sails used only for running with the wind, a sa~l for running cross-wind or to windward, possibly at speeds of from two to three times wind velocity, is required to be rigged with the leading edge stayed for damping vibration, a non-pliant member such as a mast being used if possible, and if not, then a tautly stretched, strongly anchored stay line as may be used for a jib. A skate sail, which is manually held at an oblique angle during use, is optimumly provided with a head spar. Whether the sail is tensioned tautly for running close to the wind or is provided with slack for running with the wind, a simple cruciform frame sufficiently stout to provide adequate anchorage for rigging a stay line proves excessively heavy for use in a skate sail, in which weight is a factor limiting the ability and endurance of a skater to support and manipulate a sail assembly. Reducing the number and size of framing members in a skate sail to enable use to be made of fewer, shorter and thinn members increases the serviceability of a sail for such use.
SUMMARY OF THE INVENTION
According to the present invention there is provided a sail assembly comprising: a sail; a mast disposed substantially coincident with one diagonal of said sail; a brace cruciform with said mast, said brace being non-pliant, shorter, and disposed non-coincident with one cross diagonal of said sail, and wherein the end extremities of said brace are configured with groove-like recesses; lateh means for adjustably securing said mast to said brace, relatively non-pliant spars, disposed individually along two edges of said sail which form a common juncture with said one diagonal, said spars 11~5330 being moveably retained upon either end extremity of said brace in said groove-like recesses, said brace urging said spars outward for deploying said sail, said sail being fixed to said spars and anchored to the foot of said mast.
According to a preferred embodiment, a light-weight, multi-purpose sail assembly is framed conveniently with short~ separable components of minimal collective length, including a single full said-width transverse member, a weather edge spar which is jointed at the mast head and buttressed mid-way along each jointed section on either end of an abbreviated length stiff brace which is set cruciform with a mast along which it is run and snuffed or latched to deploy the spar sections by toggle-like action and spread the sail.
A trapeziform sail is stretched tautly from an anchor point at the foot of the mast unless deployment of the spar sections is restrained by a 11~5330 cinch line as used when the sail assembly i8 rigged for hang gliding. Triangular pleces may be attached to the 6ides Or a trapezlform sail snd be separately deployed by retr~ctable spring wires to provide wind-spill troughs for the purpose of increaslng the stability and ease of handling of the sail assembly by a user in varying wind conditlons as ~ell as for increasing sail aren. In dismantling the ~all assembly for stowage, the mast sections are uncoupled ~nd placed togèther wlth the cross-brace and inwardly iolded spar arms into a compact core about which the ~ail can be rolded or wrapped. The sail assembly provided by this lnvention i~ lighter in weight and more servlcaable than those as6emblies which embodJ ~rame members which are collectively longer, and i6 more adaptable to bein~ used by per60n6 oi dif~erent ststure and weight, and in varying modes and wind condltions because of the selectively variable size of sail area which maJ be deployed.
DESCRIPTION OF T~E I~VENTION
Figure 1 is a side elevation o~ one embodiment of a skate sail assembly of thl6 invention;
Figure 2 is an elev~tlon of the detail Or the rOot edge Or the sail assembly e~hodiment Or Flgure l;
Figure 3 is a perspective view Or a latch for fastening together the mast and cross brace ~ember6 of the embodiment Or Figure l;
Figure 4 i6 a 6ide elevation Or another embodiment Or a skate sail embodiment Or thl6 invention;
Figure 5 is a perspective view of one end of the brace member of Figure l;
~ igure 6 is a perspective view Or the rOot of the mast of Figure 4 ~howing, in broken line representation~ portions Or spring wires disposed within the mast.
In Figure 1 sail as6embly 10 iB shown comprisine sail 11 tautly attached at root edge 12 and head edge 13~ respectively~ bylline 17 laced throu~h grommets 16 at the rOot corners or sail 11 and through eye 24 at the foot Or mast 22, and by lines 33 and 3~ lsced through grommets 14 and around spar sections 35 and 36 which rorm the leading edge stay for sail 11. In Figure 2 foot edge 12 is shown strengthened ~1~5~30 by relnforcing tape 18 sewed with two rows 19 o~ single stitches across the foot Or the sail a~d under grommets 16. The foot Or mast 22 is shown flattened and sealed to prerent water or debris rrom entering into the core of the tubular mast.
Sleeve 25 islshown disposed along the center line of ssil 11 enclosing mast 22 and comprises marrow elongated patches Or sail cloth fastened to sail 11 by two row~ Or stitching along its length with hand-hold 27 interspersed to enable a skster to opersbly grssp snd manipulate mast 22, the skater being positioned OD
the lee side Or sail 11 protected from the wind and in position to rest mast 22 on his shoulder to relleve the load Or m~nually holding the sail assembly aloft.
In tscking~ ssil sssembly 10 is shirted by the skater to his opposite side, the skater slwsys remaining on the same side of the sail assembly, however, to enable him to grssp the ~raming members.
head edge 13 Or sail 10 is shown reinforced with tape 30 attached by two rows 15 o~ single stitching and provided with grommets 14 spaced at about three inch intervals for lacing lines 33, 34. Toggle spars 35, 36 are light-weight ~embers, prerersbly sluminum slloy tubing, around which lines 33 and 34 are laced for clo6ely drawing ssil 11 lnto proxlmlty sgsinst the restraint of lace 17 at the foot Or msst æ. The to~gle ap~rs form a non-pliant weather ed~e reinforcement for 8all sssembly 10. Inner ends 35', 36' Or spsrs 35, 36 are shown attached to the hesd of mast 22, each such member being configured with a flattened end extremity through which an eye is provided with line 37 being passed therethrough and knotted ~t the ends to provide a hinge. If desired, spars 35, 36 msy be unconnected either to the msst or to each other without detriment to use of sail assembly 11, however, such lsck Or co~nection lessens the stability and rieidity of the seather edge of the sail sssembly.
Brsce 40 is shown cruciform with mast 22 and of lesser length than the width Or sail 11 st its upper portion, snd is preferably less than the mean width of s~il 11.
The end exkremities of brsce 40 are clesved or deeply grooved as shown in Figure 5 11~5~30 to slidably cradle and support the tub~ng configuration Or the mid-portion3 of spars 35, 36. Any other operable configuration may be used such as pivotal or roller means, but such means are not preferred. Brace 40 is preferably non-pliant, but stirrly re6iliently deformable to uree spar6 35, 36 into deployment when the brace iB advanced along mast 22 and secured in position by latch 42 carrled on brace 40~ Wood or glass fiber material is preferred for brace 40, and o~ such dimenslon as best shown in Figure 3, with the width of the member which is co-planar with the sail being greater than that of the dimension which is transver3e to the plane Or the sail to provide bending stiffness to the member ror deploying spars 35~ 36. Latch 42 is shown configured with hook 6haped met~l plate 43 secured to brace 40 and provided with bolt 46 about which rotatsble rubber cam 44 is fitted. When brace 40 is properly positioned wlth respect to spars 35, 36, it is drawn up alon6 mast 22 toward the head Or the mast until a bending moment i8 evedent by there being h resilient restoring rorce ~elt which resists further drawing Or the brace up the mast, whereupon cam 44 is rotated to the position shown in Figure 3 to frictionally secure brace 40 in the desired position relative to mast 22. Sail 11 is tautly stretched by spars 35~ 36 belng deployed by brace 40 unles6 cinch line 50, shown slack in Figure 1, i~ fore6hortened to limit outward deployment of spars 35, 36. Cinch line 50 is employed to limit movement Or spar6 35~ 36 onl~ when sail as6embly 10 is used as a hang glider.
Ma6t 22 is prei~erably fabricated from tele6copingly fitted or otherwise separable or collapsible sections of aluminum alloy tubing, joints 54, 55 being shown for facilitating convenient disas6ebly and compact stowing of sail sssembly 10.
Leech edges 57, 58 of sail 11 are shown hemmed only in Figure 1, however, they may be relnforced a~d ~itted with stay lines in the manner conventional for sail~ ir desired. Sail 11 i8 conveniently ~abricated from a retangular bolt of sail cloth by cutting the cloth diagonally on the bias and sewing the bias edges together, the seam lying along the length of mast ~2, with all outer ed~es of sail 11 being rree of bias cut fabric.
The provision of abbreviated length brace 40 disposed as a to~le-like operator ~or spars 35, 36 reduces the collective length o~ all frQme members of sail assembly 10 to less than that for sail assemblies which are equipped with a brace of full length of the transver6e axis of the sail, and because of the shorter length of brace 40 and the shorter un6upported reach spanned by spars 35, 36 than for spsrs which are end-supported, the section diameter snd weight Or brace 40 and of spars 35, 36 can be dimini6hed relative to similar member6 Or longer reach and 6pan without sacrifice in structural strength of the framin~, thus providing an optimumly serviceable and efficient sail assembly.
Sail 11 may be provided with hemmed adges to form enclosing ~leeves for receiving spars 35, 36 rather than being provided with lacing as shown, but such slee~es are not preferred because the sail fabric tends not to be as uniformly ten6ioned as when lashed to the spars by lacing. Cinch line 50 i8 eliminated from sail a6sembly 10 i~ the sail assembly is not used for hang gliding, and sleeve 25 may be eliminated from the sail as6embly, if desired.
Sail assembly 10 may be mounted on a boat, iceboat, bicycle or other land vehicle for use without being hand-held while the advantage of the sail assembly being o~ lower profile than are conventionsl 6ails and thus having greater stabillty against tipping or capsizine, is retained.
In Figure 4, sail 60 is shown stretched in the manner of sail 11 of ~igure 1 rrom the rOot of msst 22' to spar6 35 "~ 36 "~ however, triangular portions 61 6ewn on the sides of trapezium portion 11' of sail 60 are not stretched laterally as ahown snd are free to billow to form troughs or gutters for wind spilling from Gail portion 11'. Spring wires 63, which preferably comprise one-ei~hth inch diameter piano wire, retractably proJect from two openings in opposite sindes of ma6t 22' ror beine manually extended or inserted with the exposed end extremities 11~5~30 of the wires being fitted with cords 64 which attach to the free corners of triangular sail portions 61, thereby enabling theouter edges of sail portions to be tensioned without the foot edges of the sail portions being drawn taut.
Sail portions 61 are therefore enabled to form wind spill troughs unless wires 63 are fully extended whereby the sail portions 61 are tautly stretched, but may be disposed in plances angularly set from the plane of main portion 11' of 6ail 60. The inner end extremities of spring wires 63 disposed within tubular ma~t 22' are shown in broken line representation in Figure 6, the detail of the foot oi mast 22' being similar to that shown in Figure 2: as shown in Figure 6 the spring wires are fully extended and will resch farther along the ~ore of the ma6t when they are manually inserted either to stow the apparatus or to reduce the distance to which the sind spill troughs are extended. The provision Or wind 6pill troughs facilitates handling of the sail assembly by cushioning the effect Or wind 6pilling irom sail portion 11' in a manner which creates a force disrupting the balance of the sail assembly in the wind, and eases handling of the sail in tacking and trimming. Additionally~ in lieht breezes full extension Or wires 63 ef~ectively increa6es sail area materially, e.g. usin~; a ten foot l~ng mast a sail may conveniently be increased from forty-one square feet to firty-seven square feet by use of sail portions 61.
Sail 60 i6 secured to mast 22' by lacing 65, as shown in Fi~ure 4, rather than being enclosed in a sleeve as in Figure l; either ezpedeint proves suitable for u6e. Latch means 42' consi6t6 of a stout length of rubber or synthetic resin coated wire configuredlwith one helical turn about mast 22' and a hook shaped upper extremity for receiving brace 40'. When snugged in position to properly ten6ion brace 40' against spars 35 ", 36 ", latch 42' is frictionally retsined ~rom sliding on mast 22' in operable manner.
For economy of material ussge in fabricating sail 60 the side apexes of both sall portion 11' and trisngular portions 61 are of right angular config~ration ll~S330 thus providing a pattern which permits use to be made of all material in a bolt of s8il cloth. In use, sail portion 11' is tautly stretched planarly at all times whereas triangular portion6 61 are tautly stretched in one direction only when used a~ spill troughs and m~y be tautly stretched in the plane of sail portion 11' as des~red, but the flexibility of spring wires 63 enablé portions 61 when 80 stretched to yield rather readily and assume an angular disposition relati~e to 6ail portion 11' whereas sail portion 11' is firmly retainedin planar configuration by the stifrness of mast 22' and brace 4Q'. Spring wires 63 may comprise ny suitable material such as res~n bonded fibrous ~lass rods.
.
Portable frame-and-sail assemblies are widely used for skate sailing and hang gliding, and are also used for small boat, iceboab and land vehicle sailing. Such assemblies characteristically comprise a multiple number of full width spars, i.e. one at the leading edge, one near the lift center for being mannually grasped, and sometimes one at the *oot of the sail. Unlike kites, parachutes or sails used only for running with the wind, a sa~l for running cross-wind or to windward, possibly at speeds of from two to three times wind velocity, is required to be rigged with the leading edge stayed for damping vibration, a non-pliant member such as a mast being used if possible, and if not, then a tautly stretched, strongly anchored stay line as may be used for a jib. A skate sail, which is manually held at an oblique angle during use, is optimumly provided with a head spar. Whether the sail is tensioned tautly for running close to the wind or is provided with slack for running with the wind, a simple cruciform frame sufficiently stout to provide adequate anchorage for rigging a stay line proves excessively heavy for use in a skate sail, in which weight is a factor limiting the ability and endurance of a skater to support and manipulate a sail assembly. Reducing the number and size of framing members in a skate sail to enable use to be made of fewer, shorter and thinn members increases the serviceability of a sail for such use.
SUMMARY OF THE INVENTION
According to the present invention there is provided a sail assembly comprising: a sail; a mast disposed substantially coincident with one diagonal of said sail; a brace cruciform with said mast, said brace being non-pliant, shorter, and disposed non-coincident with one cross diagonal of said sail, and wherein the end extremities of said brace are configured with groove-like recesses; lateh means for adjustably securing said mast to said brace, relatively non-pliant spars, disposed individually along two edges of said sail which form a common juncture with said one diagonal, said spars 11~5330 being moveably retained upon either end extremity of said brace in said groove-like recesses, said brace urging said spars outward for deploying said sail, said sail being fixed to said spars and anchored to the foot of said mast.
According to a preferred embodiment, a light-weight, multi-purpose sail assembly is framed conveniently with short~ separable components of minimal collective length, including a single full said-width transverse member, a weather edge spar which is jointed at the mast head and buttressed mid-way along each jointed section on either end of an abbreviated length stiff brace which is set cruciform with a mast along which it is run and snuffed or latched to deploy the spar sections by toggle-like action and spread the sail.
A trapeziform sail is stretched tautly from an anchor point at the foot of the mast unless deployment of the spar sections is restrained by a 11~5330 cinch line as used when the sail assembly i8 rigged for hang gliding. Triangular pleces may be attached to the 6ides Or a trapezlform sail snd be separately deployed by retr~ctable spring wires to provide wind-spill troughs for the purpose of increaslng the stability and ease of handling of the sail assembly by a user in varying wind conditlons as ~ell as for increasing sail aren. In dismantling the ~all assembly for stowage, the mast sections are uncoupled ~nd placed togèther wlth the cross-brace and inwardly iolded spar arms into a compact core about which the ~ail can be rolded or wrapped. The sail assembly provided by this lnvention i~ lighter in weight and more servlcaable than those as6emblies which embodJ ~rame members which are collectively longer, and i6 more adaptable to bein~ used by per60n6 oi dif~erent ststure and weight, and in varying modes and wind condltions because of the selectively variable size of sail area which maJ be deployed.
DESCRIPTION OF T~E I~VENTION
Figure 1 is a side elevation o~ one embodiment of a skate sail assembly of thl6 invention;
Figure 2 is an elev~tlon of the detail Or the rOot edge Or the sail assembly e~hodiment Or Flgure l;
Figure 3 is a perspective view Or a latch for fastening together the mast and cross brace ~ember6 of the embodiment Or Figure l;
Figure 4 i6 a 6ide elevation Or another embodiment Or a skate sail embodiment Or thl6 invention;
Figure 5 is a perspective view of one end of the brace member of Figure l;
~ igure 6 is a perspective view Or the rOot of the mast of Figure 4 ~howing, in broken line representation~ portions Or spring wires disposed within the mast.
In Figure 1 sail as6embly 10 iB shown comprisine sail 11 tautly attached at root edge 12 and head edge 13~ respectively~ bylline 17 laced throu~h grommets 16 at the rOot corners or sail 11 and through eye 24 at the foot Or mast 22, and by lines 33 and 3~ lsced through grommets 14 and around spar sections 35 and 36 which rorm the leading edge stay for sail 11. In Figure 2 foot edge 12 is shown strengthened ~1~5~30 by relnforcing tape 18 sewed with two rows 19 o~ single stitches across the foot Or the sail a~d under grommets 16. The foot Or mast 22 is shown flattened and sealed to prerent water or debris rrom entering into the core of the tubular mast.
Sleeve 25 islshown disposed along the center line of ssil 11 enclosing mast 22 and comprises marrow elongated patches Or sail cloth fastened to sail 11 by two row~ Or stitching along its length with hand-hold 27 interspersed to enable a skster to opersbly grssp snd manipulate mast 22, the skater being positioned OD
the lee side Or sail 11 protected from the wind and in position to rest mast 22 on his shoulder to relleve the load Or m~nually holding the sail assembly aloft.
In tscking~ ssil sssembly 10 is shirted by the skater to his opposite side, the skater slwsys remaining on the same side of the sail assembly, however, to enable him to grssp the ~raming members.
head edge 13 Or sail 10 is shown reinforced with tape 30 attached by two rows 15 o~ single stitching and provided with grommets 14 spaced at about three inch intervals for lacing lines 33, 34. Toggle spars 35, 36 are light-weight ~embers, prerersbly sluminum slloy tubing, around which lines 33 and 34 are laced for clo6ely drawing ssil 11 lnto proxlmlty sgsinst the restraint of lace 17 at the foot Or msst æ. The to~gle ap~rs form a non-pliant weather ed~e reinforcement for 8all sssembly 10. Inner ends 35', 36' Or spsrs 35, 36 are shown attached to the hesd of mast 22, each such member being configured with a flattened end extremity through which an eye is provided with line 37 being passed therethrough and knotted ~t the ends to provide a hinge. If desired, spars 35, 36 msy be unconnected either to the msst or to each other without detriment to use of sail assembly 11, however, such lsck Or co~nection lessens the stability and rieidity of the seather edge of the sail sssembly.
Brsce 40 is shown cruciform with mast 22 and of lesser length than the width Or sail 11 st its upper portion, snd is preferably less than the mean width of s~il 11.
The end exkremities of brsce 40 are clesved or deeply grooved as shown in Figure 5 11~5~30 to slidably cradle and support the tub~ng configuration Or the mid-portion3 of spars 35, 36. Any other operable configuration may be used such as pivotal or roller means, but such means are not preferred. Brace 40 is preferably non-pliant, but stirrly re6iliently deformable to uree spar6 35, 36 into deployment when the brace iB advanced along mast 22 and secured in position by latch 42 carrled on brace 40~ Wood or glass fiber material is preferred for brace 40, and o~ such dimenslon as best shown in Figure 3, with the width of the member which is co-planar with the sail being greater than that of the dimension which is transver3e to the plane Or the sail to provide bending stiffness to the member ror deploying spars 35~ 36. Latch 42 is shown configured with hook 6haped met~l plate 43 secured to brace 40 and provided with bolt 46 about which rotatsble rubber cam 44 is fitted. When brace 40 is properly positioned wlth respect to spars 35, 36, it is drawn up alon6 mast 22 toward the head Or the mast until a bending moment i8 evedent by there being h resilient restoring rorce ~elt which resists further drawing Or the brace up the mast, whereupon cam 44 is rotated to the position shown in Figure 3 to frictionally secure brace 40 in the desired position relative to mast 22. Sail 11 is tautly stretched by spars 35~ 36 belng deployed by brace 40 unles6 cinch line 50, shown slack in Figure 1, i~ fore6hortened to limit outward deployment of spars 35, 36. Cinch line 50 is employed to limit movement Or spar6 35~ 36 onl~ when sail as6embly 10 is used as a hang glider.
Ma6t 22 is prei~erably fabricated from tele6copingly fitted or otherwise separable or collapsible sections of aluminum alloy tubing, joints 54, 55 being shown for facilitating convenient disas6ebly and compact stowing of sail sssembly 10.
Leech edges 57, 58 of sail 11 are shown hemmed only in Figure 1, however, they may be relnforced a~d ~itted with stay lines in the manner conventional for sail~ ir desired. Sail 11 i8 conveniently ~abricated from a retangular bolt of sail cloth by cutting the cloth diagonally on the bias and sewing the bias edges together, the seam lying along the length of mast ~2, with all outer ed~es of sail 11 being rree of bias cut fabric.
The provision of abbreviated length brace 40 disposed as a to~le-like operator ~or spars 35, 36 reduces the collective length o~ all frQme members of sail assembly 10 to less than that for sail assemblies which are equipped with a brace of full length of the transver6e axis of the sail, and because of the shorter length of brace 40 and the shorter un6upported reach spanned by spars 35, 36 than for spsrs which are end-supported, the section diameter snd weight Or brace 40 and of spars 35, 36 can be dimini6hed relative to similar member6 Or longer reach and 6pan without sacrifice in structural strength of the framin~, thus providing an optimumly serviceable and efficient sail assembly.
Sail 11 may be provided with hemmed adges to form enclosing ~leeves for receiving spars 35, 36 rather than being provided with lacing as shown, but such slee~es are not preferred because the sail fabric tends not to be as uniformly ten6ioned as when lashed to the spars by lacing. Cinch line 50 i8 eliminated from sail a6sembly 10 i~ the sail assembly is not used for hang gliding, and sleeve 25 may be eliminated from the sail as6embly, if desired.
Sail assembly 10 may be mounted on a boat, iceboat, bicycle or other land vehicle for use without being hand-held while the advantage of the sail assembly being o~ lower profile than are conventionsl 6ails and thus having greater stabillty against tipping or capsizine, is retained.
In Figure 4, sail 60 is shown stretched in the manner of sail 11 of ~igure 1 rrom the rOot of msst 22' to spar6 35 "~ 36 "~ however, triangular portions 61 6ewn on the sides of trapezium portion 11' of sail 60 are not stretched laterally as ahown snd are free to billow to form troughs or gutters for wind spilling from Gail portion 11'. Spring wires 63, which preferably comprise one-ei~hth inch diameter piano wire, retractably proJect from two openings in opposite sindes of ma6t 22' ror beine manually extended or inserted with the exposed end extremities 11~5~30 of the wires being fitted with cords 64 which attach to the free corners of triangular sail portions 61, thereby enabling theouter edges of sail portions to be tensioned without the foot edges of the sail portions being drawn taut.
Sail portions 61 are therefore enabled to form wind spill troughs unless wires 63 are fully extended whereby the sail portions 61 are tautly stretched, but may be disposed in plances angularly set from the plane of main portion 11' of 6ail 60. The inner end extremities of spring wires 63 disposed within tubular ma~t 22' are shown in broken line representation in Figure 6, the detail of the foot oi mast 22' being similar to that shown in Figure 2: as shown in Figure 6 the spring wires are fully extended and will resch farther along the ~ore of the ma6t when they are manually inserted either to stow the apparatus or to reduce the distance to which the sind spill troughs are extended. The provision Or wind 6pill troughs facilitates handling of the sail assembly by cushioning the effect Or wind 6pilling irom sail portion 11' in a manner which creates a force disrupting the balance of the sail assembly in the wind, and eases handling of the sail in tacking and trimming. Additionally~ in lieht breezes full extension Or wires 63 ef~ectively increa6es sail area materially, e.g. usin~; a ten foot l~ng mast a sail may conveniently be increased from forty-one square feet to firty-seven square feet by use of sail portions 61.
Sail 60 i6 secured to mast 22' by lacing 65, as shown in Fi~ure 4, rather than being enclosed in a sleeve as in Figure l; either ezpedeint proves suitable for u6e. Latch means 42' consi6t6 of a stout length of rubber or synthetic resin coated wire configuredlwith one helical turn about mast 22' and a hook shaped upper extremity for receiving brace 40'. When snugged in position to properly ten6ion brace 40' against spars 35 ", 36 ", latch 42' is frictionally retsined ~rom sliding on mast 22' in operable manner.
For economy of material ussge in fabricating sail 60 the side apexes of both sall portion 11' and trisngular portions 61 are of right angular config~ration ll~S330 thus providing a pattern which permits use to be made of all material in a bolt of s8il cloth. In use, sail portion 11' is tautly stretched planarly at all times whereas triangular portion6 61 are tautly stretched in one direction only when used a~ spill troughs and m~y be tautly stretched in the plane of sail portion 11' as des~red, but the flexibility of spring wires 63 enablé portions 61 when 80 stretched to yield rather readily and assume an angular disposition relati~e to 6ail portion 11' whereas sail portion 11' is firmly retainedin planar configuration by the stifrness of mast 22' and brace 4Q'. Spring wires 63 may comprise ny suitable material such as res~n bonded fibrous ~lass rods.
.
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A sail assembly comprising, a sail, a mast disposed substantially coincident with one diagonal of said sail, a brace cruciform with said mast, said brace being non-pliant, shorter, and disposed non-coincident with one cross diagonal of said sail, and wherein the end extremities of said brace are configured with groove-like recesses, latch means for adjustably securing said mast to said brace, relatively non-pliant spars, disposed individually along two edges of said sail which form a common juncture with said one diagonal, said spars being moveably retained upon either end extremity of said brace in said groove-like recesses, said brace urging said spars outward for deploying said sail, said sail being fixed to said spars and anchored to the foot of said mast.
2. The apparatus of claim 1 wherein said sail is traeziform.
3. The apparatus of claim 1 wherein the foot Or said sail extends substantially laterally from the foot of said mast and wherein resilient spring means are retractably disposed in the foot of said mast to spread the foot of said sail.
4. The apparatus of claim 1 wherein a cinch line is affixed to each said spar for being foreshortened to limit outward biasing of said spars by said brace.
5. The apparatus of claim 1 wherein said sail is configured with a trapezium main body and symmetrically placed triangular sail extensions which can be spread from the foot of said mast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA333,359A CA1105330A (en) | 1979-08-08 | 1979-08-08 | Sail assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA333,359A CA1105330A (en) | 1979-08-08 | 1979-08-08 | Sail assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1105330A true CA1105330A (en) | 1981-07-21 |
Family
ID=4114881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA333,359A Expired CA1105330A (en) | 1979-08-08 | 1979-08-08 | Sail assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1105330A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113306691A (en) * | 2021-07-14 | 2021-08-27 | 哈尔滨工程大学 | Multifunctional folding sail for unmanned sailing boat |
-
1979
- 1979-08-08 CA CA333,359A patent/CA1105330A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113306691A (en) * | 2021-07-14 | 2021-08-27 | 哈尔滨工程大学 | Multifunctional folding sail for unmanned sailing boat |
| CN113306691B (en) * | 2021-07-14 | 2022-06-14 | 哈尔滨工程大学 | Multifunctional folding sail for unmanned sailing boat |
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