Four chamber direct drive gas meter

Abstract From the Canadian patent

This invention relates to gas meters and in, particular, four chamber gas meters in which the diaphragms are directly connected to the tangent by means of which the valve or valves which control the flow of gas from the inlet into the chambers and from the chambers to the outlet are operated. The, gas meter is comprised of two spaced diaphragm compartments each containing a diaphragm which divides its respective compartment into inner and outer discrete measuring chambers. A control chamber is pressure sealed with respect to the measuring chambers and the exterior of the meter. Discrete passage apparatus extends between each of the measuring chambers and the control chamber. Inlet passage …