hddennis Posted April 23, 2014 Share Posted April 23, 2014 (edited) I've decided to offer this extremely rare Webb Jay Stewart Vacuum Tank Gauge here first. It is shelf worn and will require cosmetic restoration as shown in the pictures. Vacuum on the gauge causes needle movement so I'm pretty sure it functions as it should. Period literature shows it monitors vacuum tank function and also is used to calculate gas mileage. I've been into antique cars for over 50 years and this is the only one I've ever seen. Having driven a few vacuum tank equipped vehicles I would think this would be great to forewarn one of trouble in the system before it stopped completely. $200.00 plus shipping.Howard Dennis Edited April 23, 2014 by hddennis (see edit history) Link to comment Share on other sites More sharing options...
hddennis Posted December 24, 2014 Author Share Posted December 24, 2014 BTT Link to comment Share on other sites More sharing options...
hddennis Posted December 25, 2014 Author Share Posted December 25, 2014 Just read an interesting bit of history on the HCCA library site related to this gauge. Apparently Webb Jay the famous race car driver of "Whistling Billy" the White steamer brought out the vacuum tank system in 1913 and Stewart Warner bought it in 1914.Howard DennisWebb Jay Gravity Feed-The Webb Jay Motor Devices Co.,. Chicago, Ill., has brought out a system which 'changes pressure to gravity gasoline feed. This system does away with hand and power pumps and leaves the gasoline tank in the rear. The device is a brass can, Fig. 8, 10 inches high and 5 inches in diame'ter, fitted with three copper pipe connections, one coming from the gasoline tank, or the line, another running to the intake manifold and a third to the carbureter. When the engine is opera.ting the suction of the pistons creates a partial vacuum in the container, because the piston suction acts through the pipe leading from the intake manifold to the container. In order to prevent the piston suction affecting the carbureter there is inserted in the container a flap valve. It is evident that as soon as suction takes place this valve will close, forming two compart-i ments in the container. The float and its mechanism shown is the same in principle as the float of tlje carbureter. As the level of gasoline rises in the container the' float rises and when the container is full the needle valve will shut off the pipe from the intake manifold, thus stopping the suction. The flap valve will now open due to the weight of gasoline above it and this gasoline will drop to the lowe~ chamber. and thence to the carbureter. Any water or dirt in the fuel will drop to the bottom of the chamber and may be drained-periodically. Link to comment Share on other sites More sharing options...
hddennis Posted March 8, 2015 Author Share Posted March 8, 2015 Still have this RARE gauge. Open to reasonable offers.Howard Dennis Link to comment Share on other sites More sharing options...
apacap Posted March 8, 2015 Share Posted March 8, 2015 Hi Howard, I am interested in your gauge, can I call you or if you prefer to call me I am at 217 778 1`425, Thanks, Allen Link to comment Share on other sites More sharing options...
hddennis Posted March 9, 2015 Author Share Posted March 9, 2015 SOLD! SOLD! SOLD! Thanks for your interest.Howard Dennis Link to comment Share on other sites More sharing options...
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