Bacon & Thomas
Single diaphragm pressure gauge with uniform thickness gauge frame
 A pressure gauge structure that consists of a gauge frame with a graduated gauge face at the top of a lower base at the bottom. Protruding from the circumference of the lower base is an annular seat and a guide pipe that provides for gaseous flow. A diaphragm is positioned on the lower base and on the diaphragm is a coil spring topped by a shaft sleeve for a pivoting needle shaft in the tube mount protruding from the gauge face, with the needle shaft o the gauge meter positioned in a coil spring. A calibration rod extends laterally from the needle shaft, the upper end of which is secured in a pivotal state to the gauge face by a mounting base. Around the needle shaft is a spiral spring, one end mounted to the gauge frame and the other end attached to the needle shaft. Under the gauge frame is a hoop flange and the lower base has a guide pipe for gaseous flow. The diaphragm is constructed out of metal with corrugations formed on the surface. The annular seat, ring-shaped gasket and diaphragm are clamped together in the hoop flange, to form a sealed air chamber in between the diaphragm and the lower base that only allows for external access through the guide pipe. 
Chin Ray Industrial Co., Ltd.
G G
G01L G01L
inventional inventional
Chiu-Sung
Chou