Framed Prints
Framed Print of Perreaux's patent pump valves in the International Exhibition, 1862. Creator: Unknown
Perreaux's patent pump valves in the International Exhibition, 1862. This method of constructing pump-valves is extremely ingenious, simple, and efficient; it is copied from the valves contained in the human heart. Perreaux valves are made of vulcanised indiarubber...[and] are of the form of a tube flattened at one extremity...The thickness of the sides of the upper part diminishes gradually to the top, where the two sides meet and form two lips, which when the valve is in a state of rest are in close contact, and prevent the downward passage of the fluid...owing to the...the elasticity of the material, they close perfectly and instantaneously the moment the pressure from below ceases...these valves...are extensively used in soap and alkali factories, and by paper-makers, tanners, bleachers, and dyers, in pumping paper-stuff, chemicals, tan-liquor, &c. Fig. 1 represents the section through the pump-barrel; fig. 2 the section of an ordinary bucket; and figs. 3 and 4 are sections of foot-valves. The pumps have glass cylinders or barrels, so that the action of the valves may be seen. It is found advantageous to use glass barrels, as they are free from corrosion and lubricate themselves with the material which is pumped through them'. From Illustrated London News, 1862. Heritage Images features heritage image collections. © The Print Collector/Heritage Images
Your chosen combination is quickly and professionally made to order, our shipping page has more details
If you are not entirely happy with your items, simply return them to us within 30 days for a replacement or full refund. Please read our full returns policy.
Media ID 35124199
1862 International Exhibition Cultural Event Diagram Exposition Great London Exposition Industrial Revolution International Exhibition Of 1862 Invention Patented Pump Rubber Trade Fair Valve Valves World Fair Worlds Fair
Modern Frame 14"x12" (36x31cm)
Ready to Hang Contemporary Framed Prints adds style, protection, and a polished touch to your space - effortlessly.
Your artwork will be printed as shown in the preview. To adjust please select Edit Printed Image under the Buy button
Wood effect frame, card mounted, 10x8 fade resistant photo print. Overall outside dimensions 14x12 inches (36x31cm). Environmentally and ozone friendly, 40mm wide x 15mm Polycore® moulding has the look of real wood, is durable and light and easy to hang. Biodegradable and made with non-chlorinated gases (no toxic fumes) it is efficient; producing 100 tons of polystyrene can save 300 tons of trees! Prints are glazed with lightweight, shatterproof, optical clarity acrylic (providing the same general protection from the environment as glass). The back is stapled hardboard with a sawtooth hanger attached. Note: measurements provided are estimated outer dimensions, which include both the image and the frame. While we aim to keep sizing consistent, exact dimensions may vary slightly due to differences in print size or production requirements, which may result in a variation in the overall size (up to approximately 2.5cm (1"))
These are individually made so all sizes are approximate
Estimated Image Size (if not cropped) is 13.1cm x 24.4cm (5.2" x 9.6")
Estimated Product Size is 31cm x 36cm (12.2" x 14.2")
