Electronic integrator for gas volume calculations

Abstract From the Canadian patent

A mechanical and electronic apparatus for integrating gas flow charts for determining gas volume. The mechanical apparatus includes a motor driven disc on which a recorded flow chart can be placed, with suitable pen arms and, operating arms, so that an operator can simultaneously vary the angular position of each of two pens so that the pens, may trace or scan simultaneously the two recorded traces, of pressure and differential pressure as the disc and, chart rotate under a motor drive. Optical encoders convert the rotation of the disc and the angles of swing of the pen arms to digital values. The outputs of the encoders are scaled to the particular charts and chart arms. The result of the …