GUSTAV F. GERDTS FG.

GESTRA

Navigational Instruments, Water Level Indicators, Water Level Regulators, Apparatus for Removing Condensation Water Actuated by Floats, Thermically, Thermodynamically and by Means of Nozzles, Pneumatically Operated Water Removing Devices, Devices for Controlling and Inspecting Condensation Removers, Valves-Namely, Check Valves, Special Valves for Steam Boilers and Containers for Water and Gases, Rapidly Closing Valves and Thermically Operated Valves for Heating Plants, Apparatus for Removing Deposits from Boilers and Controlling Means for Such Apparatus, Pneumatically, Electrically and Mechanically Operating Regulators for Liquids and Gases and Apparatus and Devices to Guide, Lock, Regulate, Observe and Measure Liquids, Gases and Steam;