Pressure gauge
 A pressure gauge of the type having a dial with a pointer includes a tubular pressure chamber body receiving a piston with a piston rod whose one end extending out of the pressure chamber body is provided with an adjustment screw thread. An L-shaped rod member extends between the pressure chamber body and a graduated plate of the dial and has a toothed end engaging with a transmitting gear which is connected to the pointer. The angled portion of the L-shaped rod member is provided with an adjustment screw hole to receive and engage with the outer threaded end of the piston rod. The pressure gauge has a reduced size and facilitates the adjustment of the pointer in case of fatigue of the urging spring. 
G
G01L
inventional
Tien-Tsai
Huang