Process for the production of steel having a very low nitrogen content
GB508680A
Process for the surface hardening of shafts, axles and like long lengths of material
US2107797A
Apparatus for producing and storing oxygen
US2133105A
Apparatus for separating oxygen from air and delivering the oxygen under pressure
US2180715A
Liquefaction and separation of gases
US1949616A
Freezing out of water vapors contained in compressed gases or gas mixtures to be liquefied
US1901254A
Cutting mechanism
US1776077A
Combined water seal and check valve
US1800353A
Separation of air into oxygen and nitrogen by liquefaction
US1731020A
Burner for cutting and welding
US1780563A
Apparatus for separating liquids into constituents possessing a low boiling point and constituents possessing a high boiling point by distillation and rectification
GB233986A
Improvements in burners for autogenous welding or cutting of metals
US1645337A
Welding torch
US1514217A
Fluid-pressure-regulating valve
US1469442A
Carbon cartridge adapted to be used as initial igniter
