From: noone@nospam.com   
      
   Στις 22/9/2017 9:14 μμ, ο J.B. Wood έγραψε:   
   > Hello, all, and perhaps a question for the "seniors" in the ng:   
   >   
   > Back in the 1950s-1960s era one often encountered countertop (or larger)   
   > cardboard product displays that were animated by a simple back-and-forth   
   > battery-powered motor consisting of one or two permanent magnets, a   
   > coil, and make-break contacts.  This type of motor was also used in a   
   > wig-wag target, photoelectric shooting gallery toy I had.  Is there a   
   > name for this type of motor?  Googling on "reciprocating dc motors"   
   > doesn't provide any hits for this type (getting the right key search   
   > words - always an issue).  Thanks for your time and comment.  Sincerely,   
   maybe an early stepper motor?I wonder, are these series wound, or   
   shunt?I 'd think series as they have more torque...Not compound, of   
   course, that would be too complicated.   
      
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