Reference number
  • LAN/6/11
Alternative reference number
  • 1891-5226
Level
  • Item
Date
  • 24 March 1891
Description
  • A flexible-sided gas bag is inserted in the gas pipe to the engine; as pressure in the pipe varies, and the sides of the bag move, a hanging loop of leather, attached to the sides of the bag, opens or closes the gas inlet valve.