Gas meter

In a gas meter having a housing with an inlet passage and an outlet passage, a front pair of meter chambers disposed in a front area of a lower portion of said housing and a back pair of meter chambers disposed in a back area of said lower portion of said housing, a first and second reciprocating valve disposed above said meter chambers in a side by side relationship to communicate said meter chambers alternately with said inlet passage and said outlet passage, a front diaphragm disposed in said lower portion of said housing separating said front meter chambers and a back diaphragm disposed in said lower portion of said housing separating said back meter chambers, each said diaphragm corresponding to one of said first and second reciprocating valves, and means for actuating said first and second reciprocating valves, the improvement comprising:

• means for driving said first and second reciprocating valves and means for driving said front and back diaphragms mechanically linked by a crankpost to said means for driving said first and second reciprocating valves whereby each said reciprocating valve moves from a stroke shifting point proximate a center stroke point to a stroke endpoint and back to said stroke shifting point with each 180.degree. rotation of said crankpost and each stroke of each said diaphragm occurs over said 180.degree. rotation of said crankpost.