993.925.1: Jones Motor Basal Metabolism Tester, c. 1937

Additional Images

993.925.1: Jones Motor Basal Metabolism Tester. Front view
Image No. 3734 Front view; Photographer: Helen Kingsley

Object Description

The Jones motor-basal respirometer is a closed circuit bellows type of metabolimeter with a gas cylinder [B.P. Oxygen]. The oxygen tank, motor blower, soda lime granules container, bellows, switch box and pressure gauge are supported by an cast iron frame resting on four casters. The pressure gauge displays how much oxygen has been exhaled. The respirometer measures the time required by the patient to consume a measured litre of oxygen instead of computing the amount of oxygen consumed in a definite period of time. The apparatus is connected to the patient by means of a conventional mouth piece which is connected to the two rubber tubes. The motor blower circulates the oxygen and in the return circuit draws the oxygen and carbon dioxide from the patient and drives it through the soda lime [to absorb the carbon dioxide] then back into the bellows. The bellows are on a sliding mechanism with one end fixed with the recording pen attached to the moving end and a tracing of the patients’ breathing rates would be recorded on a scaled sheet of paper where the 'ABBREVIATED DIRECTIONS' plaque is situated. Incomplete, mouth piece and pen missing.

Object Classification

Accession Number: 993.925.1
Collection: Diagnostic, Clinical
Date: c. 1937

Object Dimensions

  • Height: 116 cm
  • Width: 51 cm

Object Parts

Object Materials

  • cast iron,
  • chrome plate,
  • enameled paint,
  • glass,
  • metal,
  • paper,
  • printing ink,
  • rubber,
  • steel

Acquisition Detail

  • Manufacturer: Jones Metabolism Equipment Company
  • Patent Date: 1937-06-01
  • Owner: Dr. John, P Gofton
  • History of Use: Dr John Gofton [1921-1999] used this apparatus to measure the breathing rate and oxygen consumption of a patient at rest. Invented by Horry Matthew Jones MD.