Abstract:
A spar for controlling downwind headsails is pivoted to headsail instrumentalities for stowage in an aerodynamic sleeve with the headsail. The spar and the headsail has preconnected lines for controlling the spar and headsail all stored within the sleeve.

Description:
BACKGROUND OF THE INVENTION 
     Sailboats that are fitted with a jib generally carry a whisker pole to keep the jib out when going down wind. Such a pole is fastened to the mast much like a spinnaker pole, but the whisker pole is of much lighter construction. The outboard end of the whisker pole is generally connected to a point adjacent the clew of the jib. This rig enables a sailboat when sailing from a beam reach to down wind to make the jib work rather than flap or collapsing from being blanketed by the mainsail. There is a need for a whisker pole or spar that can be easily handled by a cruising sailor with minimum effort. In a similar vein, the handling of spinnakers and particularly the smaller versions called cruising spinnakers is very difficult for the average sailor. There is therefore a need for a pole or spar that can be easily used that will enable the spinnaker to draw property in a balanced configuration. To enhance the performance of furled headsails, a sleeve that presents minimum wind resistance is desirable. This sleeve will also contain and protect the sail and spar. 
     SUMMARY OF THE INVENTION 
     It is a primary object of the present invention to provide a pole that is easily handled by the simple expedient of setting it with one line. 
     A further object of the invention is t o provide a pole that can be easily slowed within a furling jib or spinnaker. 
     A sailboat having the features of the present invention may comprise a mast and a jib fastened to the mast with a luff and clew, a single spar means has one end coupled to the luff of the jib while the other end has means coupling it adjacent the clew. A bungee cord fastened between the end of the pole and the head of the jib maintains the spar in a position parallel to the luff for stowage. 
     A further feature of the invention is the use of a cloth sleeve, which in its extended form will form a high aspect ratio foil. When the sleeve is allowed to rotate freely, the sleeve will present minimum wind resistance. Within the sleeve will be a folded sail and an attached spar that will be held substantially parallel to the headstay. 
     Therefore, the principal object of the invention is to provide a spar that is pivotally attached to the clew of a sail. In its folded or furled condition, the spar is held substantially vertical by the tension of a bungee cord that is connected to the head of the sail. To activate the spar to its vanging configuration, a downhaul line overpowers the bungee cord and pulls the spar firmly down into active position. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIGS. 1A,  1 B,  1 C and  1 D are a sequence of perspective views of a sailboat illustrating the operation of a spinnaker stowed in an aerodynamic sleeve and the spar set in accordance with the invention; 
     FIGS. 2A,  2 B,  2 C and  2 D are a sequence of perspective views illustrating a jib within an aerodynamic sleeve and a sequence unfurling and setting the spar; 
     FIG. 3 shows an alternate version of the spar in which the spar  24 ″ is pivoted adjacent the luff; 
     FIGS. 4A and 4B are enlarged views illustrating the details of the pivoting of the spar of FIG. 2; 
     FIG. 5 is an enlarged view that illustrates the pivot joint on the spar used for a spinnaker set; 
     FIG. 6 is a sectional view taken on lines  5 — 5  of FIG. 5; and 
     FIG. 7 is an enlarged view of the starboard clew of the sail in FIG.  1 . 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     In FIG. 1 there is shown a sailboat  10  having a mast  12  and at least a headstay  14 . Fastened to the upper portion of the headstay is an aerodynamic sleeve  16  with a rigid airfoil shaped hoop  17  at the base and a smaller airfoil hoop  17 ′ aloft at the head of the sail. Essentially the sleeve is composed of sailcloth and has a plurality of battens  18  spaced throughout its length to maintain the airfoil shape. As seen best in FIG. 2A, there is provided lines  20  for raising and lowering the sleeve. Within the sleeve and fastened at its head to the mast by a halyard (not shown) is a spinnaker  22 . A spar  24  is pivoted to the headstay as at  26  and may be maintained in an upright or substantially vertical position by a bungee cord fastened to one end thereof. A downhaul line  27  is affixed to either end of the spar, is passed through cringles at the clew of the spinnaker and thence through blocks  28 ,  28 ′ or fed through an aperture in the pole as seen in FIG.  7 . To control the trim of the spinnaker, there are lines  30  fastened to the pole ends and thence lead aft, often called sheet and guy. 
     The sequence of setting the spinnaker is simple. First hoist the sleeve to a retracted position aloft as seen in FIG.  1 B and as this is proceeding the spinnaker begins to stream downwind. Preferably, the center of the foot is affixed so that the spinnaker will stream in two halves. The spar is then pulled to a horizontal position with the port downhaul line  27 , which connects the spar through the clew of the spinnaker. The starboard downhaul line passes through an aperture in the pole as seen in FIG.  7 . Lines  30  connected to the ends of the pole control the set of the spinnaker and trim the spar. Ideally, the spinnaker is “squared” to the wind. 
     To douse the spinnaker, the spar is returned to an upright position by pulling in on the starboard downhaul line. The main may blanket the spinnaker and the sleeve may be easily pulled down to “stuff” the spinnaker inside the foil shape. 
     Referring now to FIGS. 2B,  2 C and  2 D a flying jib arrangement is illustrated. Jib  34  is affixed to the headstay  14 ′ in the usual fashion as known to those skilled in the art and has a spar  36  pivoted to the clew  38 . To maintain the spar in a storage position, a bungee cord  40  is attached. between the free end of the spar  24 ′ and the head of the sail. As seen in FIG. 3C, the spar has been set by pulling on the downhaul line  42  that passes through a block  44  and the shock cord is now extended. Control of the jib is achieved in the normal fashion with a trim sheet  39 . The jib can be doused by hauling down the sleeve  16 . (See FIG.  2 D). 
     Referring now to FIG. 3, an alternate arrangement of the spar is illustrated. In this embodiment, the spar is pivoted as at  50  to the luff of the jib in a pocket fashioned on the sail. The spar is normally held parallel to the luff by bungee cord  40 ′ and drawn down from the dotted line position by downhaul  42 ′ that passes through a cheek block  44 ′ fastened adjacent the clew of the jib. A sheet  39 ′ for trimming the jib is fastened to the shackle pinned to the clew. This particular arrangement adapts itself to use with a conventional roller-furling jib. 
     The only other elements that will be wrapped are the downhaul line and its cheek block at the clew. This has the advantage that everything necessary excluding the sheet is wrapped in the furled jib. 
     In FIG. 4A, I have shown the detail of one method for pivoting the spar to the clew of the jib as generally illustrated in FIGS. 2B-2D. A pocket  46  is formed at the clew  38 . The spar has a pivot aperture adjacent its end and a shackle pin passes through the clew cringle and the aperture. FIG. 4B illustrated one method for fastening the block  44 . A pocket  48  is formed with a shelf  49  at the luff of the sail onto which the block  44  is fastened. Other arrangements will suggest themselves to those skilled in the art. 
     In FIGS. 5 and 6 I have illustrated a method of providing a pivot on the spar used in the spinnaker embodiment of FIGS. 1B-1D. A reinforcing tube  25  embraces the spar and through the sleeve and the spar a pin  35  extends which has one end welded to a sleeve  29 . The sleeve  29  is maintained in position on the headstay by stops  31 . The pin  35  may freely rotate in the aperture formed in the spar. 
     FIG. 7 shows the detail of the starboard end of the spar in the spinnaker embodiment and it is noted that the downhaul line  28 ′ passes through an aperture in the spar, thence through a grommet and terminates in a stopper. The trimming sheet  30  is fastened to a ring or suitable means at the end of the pole. 
     The invention as set forth in the foregoing specification improves the speed, simplicity and safety of the setting jibing and retrieving an off wind sail that is normally an arduous and dangerous process requiring expert handling by experienced persons. In the spinnaker version, the invention there are many advantages amongst which it is noted that the spinnaker is already hoisted and the spar is attached. The balanced nature of the spar reduces trimming loads, which in a conventional arrangement is very high on the guy line. In the jib version the spar is already in place so there is no attaching to the mast as with a conventional whisker pole. The invention also allows the jib to be led forward on a reach, still maintaining the jib&#39;s effective shape which can not be accomplished with a whisker pole that is affixed to the mast. 
     The foregoing sets forth the invention in a practical form but the structure shown is capable of modification within a range of equivalents without departing from the invention.