Controlling water feed or water level; Automatic water feeding or water-level regulators

Child Classifications

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• F22D 5/02 with an intermediate compartment from which the water is fed by gravity after mechanically moving the compartment, the movement being controlled according to water level
• F22D 5/04 with pivoting buckets
• F22D 5/06 with receptacles external to, but in free communication with, the boilers and adapted to move up and down in accordance with change in water level
• F22D 5/08 with float-actuated valves
• F22D 5/14 responsive to thermal expansion and contraction, e.g. of solid elements
• F22D 5/18 for varying the speed or delivery pressure of feed pumps
• F22D 5/24 with electric switches
• F22D 5/26 Automatic feed-control systems