Tire Valve Lubricator?

[Michael Denning]

OK, I finally got around to looking at a "Twin Cylinder Steam Engine" article as described in Jan/Feb 2004 LIVE STEAM. He shows complete construction details EXCEPT he offhandedly refers to "Tire Valve Lubricator" and shown No info on it.
Where can I find info to make a Tire Valve Lubricator?
Any contact info for Andy Sprague?
Thanks
Michael
Floriduh
USA
Iron Naut

[Clover McKinley]

For Michael Denning:

In February 2004, George Davis gave a most satisfactory answer to a similar question in the "Collateral Steam" section of "The Steaming Bay." Check it out!