Abstract:
A vertical shaft is provided and supported whereupon are mounted sails that can so self adjust as to interact with the wind in such a way as to power a windmill as well as relieve themselves from winds that are too severe while maintaining continuous operation.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     This invention relates to a windmill of the vertical shaft type, which uses a self-adjusting sail or sails to catch the wind on one side of the mill and the same self adjusting design of the sail or sails to reduce the profile of the sail or sails and thus the resistance on the opposite side of the mill to near zero. The mill is designed to catch low velocity wind efficiently, turn at relatively low speed, and produce high torque, as well as be able to relieve itself from winds that are too severe. The only other windmills of similar design that I am aware of are wind speed indicators and wind turbines designed as vents. These are vertical shaft windmills of a fixed design. These former designs have too much reverse resistance, require too much material for construction, and are unable to relieve themselves from winds that are too severe.  
       BRIEF SUMMARY OF THE INVENTION  
       [0002]     The invention relates to a vertical shaft windmill, having a self-adjusting sail or sails, the object of which is to provide a windmill that can catch low to moderately strong winds more efficiently, to provide a mill whose external parts move relatively slow, thus avoiding any fast moving parts aloft, both to reduce risk as well as construction cost, and to put any equipment driven by the mill on the ground where it can be easily serviced.  
     
    
     BRIEF DESCRIPTION OF THE DRAWING  
       [0003]     Only one drawing is provided as I believe this to be adequate for understanding the invention.  
         [0004]     DRAWING- 1  (is a side elevation view of the windmill)  
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0005]     Referring now more specifically to the drawings. The numeral  1  refers to the Self Adjusting Sail Vertical Shaft Windmill. The windmill  1  includes a base  42  of some substantial material, concrete, steel, etc . . . a pivot bearing  2  and lubricant housing  3 , a lower vertical shaft  4 , a drive pulley/flywheel  5 , a lower support and bearing arm  6 , a flex joint  7 , for raising or lowering the upper part of the windmill  1 . The upper part of the windmill  1 , includes an upper vertical shaft  8 , and an upper support and bearing arm  9 . The upper support and bearing arm  2  also serves as a connect to the tower  10 . The upper support and bearing arm  2  are brought into alignment with the tower side of the connect  11 , by placing a stop  12 , on the vertical shaft  8 , at the appropriate height. The upper part of the windmill  1  is raised or lowered by use of a winch  13 , and cable  14 . Above the upper support and bearing arm  9 , are mounted sets of sail assemblies  15 . Since any number of sail assemblies such as  15 , may be included in the construction of the windmill  1 , only one set will be drawn and numbered in detail, although at least three sets such as  15 , are recommended, also additional sets such as  43 , are placed at different heights, so that one sail does not block wind to another. The sale assembly  15  consists of a rocker arm bearing shaft  16 , and retainer cap  17 . The rocker arm bearing shaft  16  protrudes perpendicular from the upper vertical shaft  8 , at the appropriate height and degree. Upon the rocker arm bearing shaft  16 , is mounted the rocker arm  44 . To the rocker arm  44 , is attached the safety springs  18  and  19 , hence to the connecting cables  20  and  21 , which in turn are connected to the positioning bars  22  and  23 . Above the rocker arm bearing shaft  16 , at an appropriate height are mounted two sail bearing shafts  24  and  25 , protruding perpendicular from the upper vertical shaft  8 , and set directly opposite of one another. Mounted on the sail bearing shafts  24  and  25 , are two sails  26  and  27 , in such a way as to hinge or swing. The sails  26  and  27 , consist of four hinge arms  28 ,  29 ,  30  and  31 , two sail frames  32  and  33 , two balance bars  34  and  35 , two positioning bars  22  and  23 , and two sail sheets  36  and  37 , of an appropriate material such as metal, plastic, etc . . . The sails  26  and  27 , are held in position on the sail bearing shafts  24  and  25 , by use of two stops  38  and  39 , and two retainer caps  40  and  41 . As the wind comes against any side of the windmill  1 , it causes the sail or sails such as  26 , on one side of the windmill  1 , to come broadside to the wind, at the same time the opposite sail or sails such as  27 , is lifted causing its profile to the wind to diminish. The force of the wind being only on one side of the windmill  1 , causes it to turn, hence the drive pulley/flywheel  5 . Power can then be transmitted from the drive pulley/flywheel  5 , to any appropriate receiver. The positioning bars  22  and  23 , the two cables  20  and  21 , the two springs  18  and  19 , and the rocker arm  44 , are provided not only to position the sails  26  and  27 , but in the event of too severe of a wind, to provide relief to those sails such as  26 , to the wind. In the event that a spring such as  18  or  19 , or cable such as  21  or  22 , breaks, the broadside sail or sails such as  26  can swing out of the wind.