I peeked at an interesting bit of info on Wiki about a special motor that Bar-Col made..... a reversible shaded pole motor.
Never heard of a reversible Bar-Col...
"A reversible shaded-pole motor was made by Barber-Colman several decades ago. It had a single field coil, and two principal poles, each split halfway to create two pairs of poles. Each of these four "half-poles" carried a coil, and the coils of diagonally-opposite half-poles were connected to a pair of terminals. One terminal of each pair was common, so only three terminals were needed in all.
The motor would not start with the terminals open; connecting the common to one other made the motor run one way, and connecting common to the other made it run the other way. These motors were used in industrial and scientific devices."
Nicholas Denney wrote: I peeked at an interesting bit of info on Wiki about a special motor that Bar-Col made..... a reversible shaded pole motor.
Never heard of a reversible Bar-Col...
"A reversible shaded-pole motor was made by Barber-Colman several decades ago. It had a single field coil, and two principal poles, each split halfway to create two pairs of poles. Each of these four "half-poles" carried a coil, and the coils of diagonally-opposite half-poles were connected to a pair of terminals. One terminal of each pair was common, so only three terminals were needed in all.
The motor would not start with the terminals open; connecting the common to one other made the motor run one way, and connecting common to the other made it run the other way. These motors were used in industrial and scientific devices."
Amazing, what can I say. That means they had the technology to listen to records backwards 7 decades ago.
That means they had the technology to listen to records backwards 7 decades ago. 
