Pulsation Engine 1775



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English: A represents a spring or an original reservoir, its upper surface coincides with the horizontal line BC and the bottom of reservoir K. D the main pipe, 1.5 inch in diameter, and nearly 200 yards in length. E a branch pipe, of the same diameter for the services of the kitchen offices, operated by the cock F, situated at least 18 to 20 feet below the surface fo the reservoir A. G respresents a valve box, restricting waterflow from left to right, and H an air vessel. The ends of the main pipe are inserted into H and bend downwards, to prevent the air from being driven out when the water is forced into it. W is the water level in H. By opening the cock F the water column D is set in motion and then abruply stopped by the closing of F, its momentum will open valve G and compress the air in H. The compressed air will force some, but not all of the water in H, via duct I, into reservoir K. Thus some water was pumped from the lower reservoir A into the higher reservoir K.
Deutsch: A ist die Wasserquelle oder ein Teich. Der maximale Wasserspiegel von A stimmt mit dem Boden des Tanks K überein (siehe Linie BC). D ist eine Wasserleitung mit fast 4 cm Durchmesser und einer Länge von 180 m. E ist eine Zweigleitung von D; beide Leitungen haben den gleichen Durchmesser. An die Leitung E ist ein Wasserhahn F angeschlossen. Der Wasserhahn muss 5,8 bis 6,0 m unterhalb der Wasseroberfläche des Teichs A liegen. G bezeichnet einen Ventilkasten, der nur einen Wasserfluß von links nach rechts zuläßt. H ist ein Windkessel, dessen Wasserlinie mit W gekennzeichnet ist. Die Ein- und Ausflußrohr in den Windkessel sind nach unten gebogen, damit bei einströmendem Wasser keine Luft aus dem Windkessel gedrückt werden kann. Wird der Hahn F geöffnet, so setzt sich die Wassersäule in der Leitung D in Bewegung. Mit dem Verschluß des Hahns F wird diese Bewegung abrupt gestoppt. Die Bewegung durch die Massenträgheit der Wassersäule öffnet das Ventil G und komprimiert die Luft im Windkessel H. Es ist diese komprimierte Luft, die das eingeströmte Wasser über die Leitung I in den Tank K pumpt.
Date 1775(1775)
Source Whitehurst, John (1775(1775)). The Philossphical Transactions of the Royal Society of London, from their commencement in 1665 to the Year 1800; Volume 13; Abbridged.. Blackfairs, London: C. & R. Baldwin. pp. 645-646, plate 12 fig. 10.
Author Dr. Mirko Junge


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