[Sectional drawing of Lenoir's igniter, 1865. 1934. Ink & colour wash, scale 1 : 1. Museum drawing relating to Lenoir's 1860 patents. The ignition coil of his gas engine caused the spark to trigger combustion. An 1860 Lenoir gas engine, inv. no. 1865-21, is in the Museum's Heat Engines (other than steam) collection] Lenoir's igniter, 1865
Coloured diagram showing arrangement for exhausting a large wireless valve, by Science Museum Drawing Office, South Kensington, London, 1927. A Herbert McLeod vacuum gauge is shown for measuring pressure. Coloured diagram showing arrangement for exhausting a large wireless valve
Enlarged sectional drawing showing construction of Renold's keyed bush roller chain Enlarged sectional drawing