Interesting Brass Valve

[bc.gold 3,403]

From the patent number learned what this unusually brass cup was used for.

 

E. W. ROBERTS.

PRIMING CUP.

APPLlCATlON FILED JUNE 1, 1915.

Patented Aug. 8, 1916.

 

 

[bc.gold 3,403]

Champion even made a spark plug that would accept a priming cup. I would have thought a wet plug would have made it more difficult to start the engine.

 

[The Tuul Crib 7,336]

I was going to guess an oiling valve. 

[Stormin 9,981]

11 minutes ago, The Tool Crib said:

I was going to guess an oiling valve. 

 

 That was my first thought as well.

 

 I wonder if you opened the valve while the engine was turned over? Bit like squirting fuel in the carb' throat.

[The Tuul Crib 7,336]

You would see these similar things on electric motors.

[Stormin 9,981]

With a tap on? The oil cups on electric motors I've seen don't have taps. The bigger ones on old machines, steam engines etc, usually have wicks.

[Stormin 9,981]

 It is a primer cup for Ford Model T's. 

 

You open the petcock and drop a drop of fuel down that goes into the cylinder. Close the petcock then crank the engine. Designed to ease starting on cold mornings. Engine most likely had 4 plugs.

Edited August 21, 2019 by Stormin

[bc.gold 3,403]

2 hours ago, The Tool Crib said:

I was going to guess an oiling valve. 

 

That's exactly what I thought it was, then looked up the patent number.

 

The primer below is from my Lister engine by adding fuel into the cylinder via the primer it raises the compression for cold weather starts. Brass cup threads into the intake manifold.