GEOMETER describes some types and their uses
BEGINNERS WORKSHOP These articles by Geometer (Ian Bradley) were written about half a century ago. While they contain much good advice, they also contain references to things that may be out of date or describe practices or materials that we would not use today either because much better ways are available of for safety reasons. These articles are offered fortheir historic interest and because they may inspire more modern approaches as well as reminding us how our hobby was practiced in the past.
IN ITS VARIOUS FORMS, the valve is an essentia] part of engines, pumps and pressure, systems depending for their function on the retention or flow of gases and fluids-air, water, petrol, oil, etc.
The simple valve works automatically from the…
