Tire pressure detector
 A tire pressure detector comprises a hollow cylindrical casing having an internal screw thread for attachment to an inflating valve of a tire. A transverse partition member which divides the casing into two chamber is provided with a projecting pin for pushing the inflating valve to an open position. A cap member is secured to the casing for closing one of the chambers, and a piston member responsive to the pressure is mounted in the chamber. An alarm means is connected to the piston member and has a portion extending out through the cap member. The alarm means may be a graduated rod or an electric light means. 
B
B60C
inventional
Tien-Tsai
Huang