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Museum catalogue: Antarctic Collection


Flowmeter and face mask

Accession no.: Y: 59/8/4/4a-c
Object name: Flowmeter and face mask
Title: Flowmeter and face mask
Description: A flowmeter (a), rubber face mask (b) marked 'Geoff' (John Geoffrey Drewe Pratt) and head strap (c). From the Commonwealth Trans-Antarctic Expedition 1955-58 and part of a sledging box (Y: 59/8/4/1) containing integrating motor pneumotachograph (IMP) equipment, used for determining energy expenditure by analysing expired air to calculate oxygen consumption.
Classified name:
SPRI theme health
Current place name Antarctic regions
UDC 612
Geographic UDC (*7)
Getty AAT
Number of items: 1
Full description:

a: The flowmeter consists of a clear plastic dome containing a flexible diaphragm, a linearising disc, a micropotentiometer and a thermometer. The edge of the dome is scratched 'RED'. There is a round inlet hole on the front of the dome to which the face mask attached. There is a metal sample outlet in the base with a red rubber hose and two cables inside an orange rubber tube. The hose has a metal nozzle and connects the flowmeter to the sample-collecting unit, and two cables end. One cable has a black plastic plug with two flat metal pins, and the other has a black plastic plug with six flat metal pins to connect the flowmeter to the integrating motor. The thermometer is marked in degrees C from -30 to +60, and is marked 'ROTOTHERM // REG. PAT'. The base of the dome is marked in black and red 'J. LANGHAM THOMPSON LTD. // FLOWMETER // SERIES NO 9 // BUSHEY HEATH // HERTS. ENG.'

b: The face mask is a modified RAF H-type green rubber face mask, with chamois leather-lined cheeks. It has five spring-loaded inlet valves, so placed that the inspired air blows over the nose and mouth. There is a hole at the bottom of the mask to take a tube to connect the face mask to the flowmeter, moulded 'DETACH TUBE HERE'. The face masks were available in three sizes – the rubber on this one is moulded 'MEDIUM'. Handwritten in pen on the front of the mask is the name 'GEOFF' (J.G.D. Pratt). Grey textile webbing straps pass through rubber loops on the front of the facemask and are secured with safety pins; these are attached to fittings for the head strap. The front of the mask is covered with bright green felt, backed with metal foil, and fixed in place with safety pins.

c: The head strap is made of beige textile webbing and has a metal adjustor. It has a metal hook at one end and two metal poppers backed with leather at the other for attaching to the sides of the face mask. The poppers and hook are backed with elastoplast.

  • a: Dimensions: ?
  • b: Dimensions: ?
  • c: Dimensions: ?
Associated person(s):
  • Used by: Pratt, John Geoffrey Drewe (1955 - 1958)
Associated expedition(s):
  • Used on: Commonwealth Trans-Antarctic Expedition 1955-58 (1955 - 1958)