A counter-weighted water seal spirometer. The main pen was attached to the counter-weight and drew a volume-time curve on graph paper attached to the kymograph drum. The secondary pen was attached to a mechanical integrator and was used for MVV tests. Photo found at http://www.pemed.com/techantq/tantique.htm
Category Archives: 1960s
Spirometer, Collins, circa 1965, front view
A counter-weighted water seal spirometer. The main pen was attached to the counter-weight and drew a volume-time curve on graph paper attached to the kymograph drum. The secondary pen was attached to a mechanical integrator and was used for MVV tests. Photo found at http://www.pemed.com/techantq/tantique.htm
Exercise Testing, 1965
Tidal volume was monitored with a heated Fleisch pneumotachograph that was mounted downstream of a Hans Rudolph two-way high velocity valve. Exhaled air was collected in plastic and neoprene bags, the volume subsequently measured with precision gas meters. Gas concentrations were measured with a gas chromatograph. The bicycle eergometer used friction resistance to maintain and steady workload and the subject pedealed to a metronome. Taken from the “The inhalation of the photochemical smog compound peroxyacetyl nitrate” by Leon E. Smith EdD in AJPH volume 55, no 9, Sept 1965, page 1460.
Spirometer, Wohlgroth, circa 1960
From: http://www.radiomuseum.org. Manufactured by H. Wohlgroth & Co., Zurich, Switzerland. Probably from around 1960. Wohlgroth & Co. were noted as manufacturers of gas meters so this spirometer may be of that type.