When the telescope 55 is pivoted vertically fraction of a degree, the arm 57 engages either of the switches 58 and 59 which energizes the motor 43 to rotate the shaft 42, gears 41 and 40 which in turn rotates the shaft 30 causing {HEAD ~ all} of {TAIL ~ the structure} mounted on the shaft 30 to swing together to a new position 
of
When the telescope 55 is pivoted vertically fraction of a degree , the arm 57 engages either of the switches 58 and 59 which energizes the motor 43 to rotate the shaft 42 , gears 41 and 40 which in turn rotates the shaft 30 causing { HEAD ~ all } of { TAIL ~ the structure } mounted on the shaft 30 to swing together to a new position
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH