Jig/guide/gauge for making two exactly parallel lines?

[Donny Bahama]

I remember seeing (in one of my many, MANY woodworking books/magazines) a tool that used a scissor-type mechanism to make lines that were precisely parallel. Now I can't find it. Neither can Google. Anyone know what I'm talking about?

[john bateman]

I have seen mortise gauges which can do that, but there are no scissors involved.

[Charles Wiggins]

Was it a parallel rule (https://www.amazon.com/Weems-Plath-Navigation-Parallel-Aluminum/dp/B000IMT1M8)?

415139

[Edwin Santos]

There's something kind of like you are describing called equal space dividers. Rocker sells one version that happens to be on sale right now :
https://www.rockler.com/m-power-point-2-point-mk2-layout-tool?sid=V9146?utm_source=google&utm_medium=cpc&utm_term=&utm_content=pla&utm_campaign=PL&gclid=CjwKCAjwqZPrBRBnEiwAmNJsNt6I5vFU5r4qKhoyCgIs 6cFlmAqtJG5ySPIsEco6fCAF6KQq9bfu9BoCyAgQAvD_BwE

Woodpeckers made one through their One Time Tool program, but I think it's now retired but you can look it up,
Edwin

[Steve Fish]

I think you have the winning answer Charles. On the other hand, if something on a larger scale is needed a coping jig for the table saw is basically the same thing. I think Mark over on the WW has a vid on making one