{TAIL ~ The extension} 48 serves to deactivate the motor 20 by means of a microswitch 50 disposed within the first end 14 of the frame 12, thus precluding further advance of {HEAD ~ the plates} P along the rod 26 when a single plate P drops from the end of the rod 26 to trip the switch extension 48, and open the switch 50 
{ TAIL ~ The extension } 48 serves to deactivate the motor 20 by means of a microswitch 50 disposed within the first end 14 of the frame 12 , thus precluding further advance of { HEAD ~ the plates } P along the rod 26 when a single plate P drops from the end of the rod 26 to trip the switch extension 48 , and open the switch 50
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