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John James Holmers
Thomas Mullock
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Individual
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Individual
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Publication of GB190716477ApublicationCriticalpatent/GB190716477A/en
16,477. Holmes, J. J., and Mullock, T. July 18. Pressure-regulating valves.-A piston valve d, provided with suitable ports e, works in a cylinder a having an inlet port b and an outlet port c in the same plane. The upper end of the valve is exposed to the pressure in the outlet port through a passage g, while the lower end of the cylinder is closed and fitted with a suitable draining-device at i. The valve spindle t passes through a boss r provided with water grooves s, and is acted on by an adjustable spring f or by a weighted lever.