source into pivotable rotary motion of one of the wind shifting plates application_number US 42703382 A description referring to fig1 upper and lower frames 8a 8b are provided at a blow outlet of an air conditioner not shown the frames 8a 8b comprise a pair of supporting members which pivotally support a plurality of wind shifting plates 1 two of which are identified as 1a and 1b in fig1 the plates are rotatably secured to the frames 8a and 8b by supporting shafts 9 and the plates 1 are connected to each other by means of a connecting bar 2 so that all the wind shifting plates are integrally movable a driving shaft 11 extends from the bottom of a driving wind shifting plate 1a and the driving shaft 11 extends through a hole bored in one end of an arm 3 so that it is rotatably connected to the arm 3 a shaft 17 extends from the other end of the arm 3 and the shaft 17 is rotatably connected to a movable plate 4 by inserting the shaft 17 in one of a plurality of holes 7 in the movable plate 4 the positions of the holes 7 are determined by the length of the arm 3 the necessary angle of rotation of the wind shifting plate 1 and so forth the movable plate 4 is rotatably fixed to the frame 8b by means of a support 10 and an elongated hole 12 is bored through the opposite side of the movable plate 4 a pin 5 of a crank 13 which is attached to a low speed rotary motor 6 is fitted through and slide within the elongated hole 12 so that it converts the rotary motion of the.