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13884801
Wall Art and Photo Gifts from Mary Evans Picture Library
13884801
Mary Evans Picture Library makes available wonderful images created for people to enjoy over the centuries
Media ID 32337394
© Aviation Ancestry
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VISUAL DESCRIPTION
This is a vintage advertisement for the Smiths Inductor Pressure Gauge, highlighting its new and simplified approach to measuring oil and fuel pressures. The ad emphasizes that this electrical pressure measuring system, developed in conjunction with British Engine Manufacturers, is designed for direct mounting on the engine and boasts immunity to vibration due to no moving contacts. It features specifications such as an interlaboratory mean f. s. d. (full scale deflection) error range of ±0. 4% at 40-140°F or ±0. 8% at -65°F for oil pressure range and ±0. 75% f. s. d. for fuel pressures. The equipment requires a power supply of 26 volts±10% cycles and a miniature transformer is provided so that the system may be used on standard 115 volt aircraft supply. The output from the Transformer is 110 V. A. C at 5 Power Factor which the Rectifier unit supplied transforms into Direct Current for use with any Aircraft Instruments. The bottom part of the image shows two illustrations: one depicting a close-up view of the gauge's dial and another showing how it can be mounted onto machinery. The advertisement also notes that these gauges are approved by Air Registration Board and adopted by many British Commonwealth Military Aircraft, indicating their reliability and acceptance within aviation circles during that era. Smiths Aircraft Instruments Limited based in Cricklewood Works, London NW2 was responsible for manufacturing these instruments, with additional sales concessions listed below including Kelvin Hughes (Aviation) Ltd. , Barr & Stroud Ltd. , Barking; and Sangamo Weston Ltd. , Basingstoke.
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