Christensen O'Connor Johnson & Kindness
Pressure gauge
 A pressure gauge for measuring the pressure of a tire includes a hollow cylinder tube having two open ends and two flange portions one at each side of the ends; a spout portion having a passage within being connected to the cylinder tube; a pair of sealing plates having holes therethrough, being disposed on the cylinder tube; an elongated rod having two opposite ends and two tip portions extending axially from the ends. Each of the ends has an outer rim and the tip portion respectively protruding through the holes in the sealing plates. The elongated rod is movably fitted between the sealing plates and inside the cylinder tube. A pair of pressing members is disposed at the open ends of the cylinder tube to form seals. A sensing member is connected to the spout portion. 
G
G01L
inventional
Tien-Tsai
Huang