Relay question

Chuck Guzis cclist at
Sat Nov 29 00:58:34 CST 2014

On 11/28/2014 10:35 PM, Mike Stein wrote:
> Well, gee, if you're going to use a DPST pushbutton anyway, then all you
> need is a single impulse relay like the original suggestion.

Anyone remember Lionel trains?  The power packs were AC (not DC as in 
HO) and there was an impulse relay for reversing called an "E-Unit":


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