35 are still utilized to maintain proper tension on the cable throughout the forward the reverse travel of the transfer car 10 in accordance with the embodiment of fig7 the automatic switching for the purpose of halting the transfer car 10 in its forward and reverse limit positions is accomplished by means of a geared rotary limit switch 50 connected to the end of the shaft 28 that projects into the safe area beyond the wall 12 the geared rotary limit switch 50 may be for example a type of switch identified by the trade designation cr115e manufactured by general electric company the geared rotary limit switch 50 opens the power supply circuit to the motor 20 after the switch mechanism has been rotated through an adjustable preselected number of turns and or portions thereof to provide the desired amount of travel by the transfer car 10 the switch 50 is provided with a switching mechanism at both clockwise and counterclockwise limits of its rotary motion the predetermined number of turns is adjustable to permit fine adjustment of the forward and reverse limit positions of the transfer car 10 the operation of the equipment will be described for the purpose of illustration with respect to the embodiment of fig1 through 6 the operation of the embodiment of fig7 being readily apparent from the discussion below and differing only with respect to the manner of making remote adjustments of the transfer car.