Estate sale find...coil?

[Wick]

The Tag says Spark coil tester. Picked up a Model A hub puller and some Ford Script tools,and one Z05 valve grinding tool.

 

[23hack]

This picture is of a low tension ignition coil for a single cylinder stationary engine.

 

[CharlieB]

What's under that copper looking dome on the right side? Points?

 

[Wick]

I wondered what it might work on,thanks
Im going to look at it a little closer and see whats there.

 

[Jack Innes]

This coil is used in an engine without a spark plug. It will have an ignitor which is essentially a set of points inside the combustion chamber that produces a hot spark when the points open. Often the primary winding of a T coil is used to do the job of your coil.
The whole system usually consisted of the points, a coil & several dry cells. NO condenser. The points are tripped by the valve linkage.

The following link has good information & diagrams of exactly how it works.
http://www.old-engine.com/magign.htm

I spent part of yesterday making a 1906 IH 1 hp engine run after decades of rest. It has this system. (Let me know if your coil needs a home)

 

[23hack]

The domes on each end house iron wires that makeup the core. The domes are wood.

 

[Mike V. Florida]

Henry's Quadricycle had internal spark did it not?

 

[Jack Innes]

Yes the Quadracycle has an internal spark. The two plugs will have electrodes forming a gap inside the cylinder like an oil burner or a 1 cylinder Cadillac. The spark is timed by the insuilated bar linked to the exhaust valve rocker arm.

There have been reproduction cars built using a regular spark plug.

The coil pictured in this thread would not work on this system.