Sun-light-redirector useful in day-lighting, photo-voltaics and solar heating

Abstract

An automatic sunlight redirector comprises of a device which redirects sunlight to a place of user's choice. This is a universal model and does not need data and microprocessor to track the sun at different latitudes, nor does it need any computer to calculate the angle of reflectance. This device works on principle of arranging incident sun-ray, target-line and the mirror-axis as sides of an isosceles triangle and is realized by the devices of sun-tracking director-bar, a slide fitted on this director-bar, and a groove on the mirror-axis pipe/bar ( 5 ) for free movement of the director-bar ( 10 ) which not only tracks the sun but continuously adjusts the position of the mirror such that the light is reflected on the fixed target. The declination-setter ( 8 ) and time-setter ( 15 ) track the daily changes in the declination of the sun and the length of the day respectively.

1 . The device of sunlight-redirector wherein the novel technique of redirecting sunlight on a fixed target is achieved by arranging i) direction of incident sun-ray ii) the direction of the target and iii) the axis of the moving mirror as three sides of an isosceles triangle. 
   
   
       2 . The sunlight redirector device of  claim 1  where two arc-couples holding the mirror, make possible the movement of target-arm in practically all directions, and yet maintain the same distance between director-bar-pivot and the mirror-arm-pivot, thereby making it useful for reflection of sunlight in any direction without making any change whatsoever in the machine. 
   
   
       3 . The device of  claim 1  where the said arrangement of isosceles triangle described in claim ( 1 ) above is achieved by the combination, the sizes and the placing of following components:—
 a) the Sun-tracking director-bar, fitted on and moved by the polar-axis-bar, being one of the equal sides of the isosceles triangle which occupies the position of sun-ray, b) the virtual line, joining pivot of the director-bar and the pivot of the mirror-axis, equal in length to the length of the director-bar, occupying the position of the second equal side of the isosceles triangle and c) the mirror axis forming the third line of the isosceles triangle.   
   
   
       4 . The device as claimed in  claim 1  where i) a slide fitted on the sun-tracking director-bar, ii) the groove on the mirror-axis pipe/bar for holding the slide and allowing its free movement, iii) the two mutually perpendicular axles for the mirror-axis-bar ensuring its free movement in two plains, make possible the working of technique claimed in claim ( 1 ) by (i) allowing free movement to the director-bar to remain sun-oriented, (ii) adjusting the mirror-arm to different positions when moved by the director-bar and (iii) maintaining the isosceles character of the triangle formed by the three arms as narrated in claim ( 1 ) and claim ( 2 ) above. 
   
   
       5 . The sunlight redirector of  claim 1  where the adjustable circular arc holding polar-axis-bar makes possible setting of polar-axis-bar parallel to the earth-axis at all places of different latitudes, and by this makes the machine globally useful without any change in the machine, and at the same time maintains the same distance between the director-bar-pivot and the mirror-arm-pivot. 
   
   
       6 . A declination-setter which sets the angle of declination of the sun-tracking director-bar on the polar-axis-bar exactly equal to the angle that the Sun has with the axis of the earth on the day of operation by virtue of the specific size, designing, and respective functions of the components: declination-bar, clamp, coning-bar, circular-trip, eccentric positioning of the circular-strip and calendar-disc, and the timer. 
   
   
       7 . A time-setter which sets position of the polar-axis-bar with the help of its components; time-bar, time-discs, and the timer such that when it starts working on the alarm of the clock, the increase or shortfall in the length of that particular day i.e. the time elapsing between last and the coming noon—commonly ascribed to fast or slow movement of the Sun or alternatively of the earth—is neutralized by the shifting of the time-point caused by the movement of time-disc with uneven radius—specifically designed on the basis of actual experience to bring about this effect in one version, and with the help of a programmed timer to start operation at different time on each day while the starting point is fixed according to the desire of the user.