Oblon, Spivak, McClelland, Maier & Neustadt
Gauge with alarm device
 A pressure gauge includes an alarm generating device which is actuated by a modified pressure indicating stick upon detection of an insufficient or overinflated pressure condition within a tire. The pressure checking operation is possible even if there is inadequate surrounding light and the gauge can be checked without the need for reading the pressure indicating stick or an associated scale dial. 
G
G01L
inventional
Tien-Tsai
Huang