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13884186
Mary Evans Picture Library makes available wonderful images created for people to enjoy over the centuries
Media ID 32336336
© Aviation Ancestry
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VISUAL DESCRIPTION
The image is a black and white advertisement for Weston Aircraft Instruments, featuring various types of aviation instruments with their model numbers and brief descriptions. The top section is labeled "NAVIGATIONAL" and includes instruments such as the S113 Distance and Orbit Meter, S114 Beam Approach Indicator, which are designed to assist in navigation by using systems like Rebecca Mark IV Beacon system or interfacing with radar vectors. Below that, under "TEMPERATURE MEASURING, " there's the S63 Circular Scale Ratiometer and the S64 Temperature Indicator. These are used to measure temperatures critical for aircraft operation either through resistance thermometers or other temperature-sensing devices. In the final section titled "POWER INDICATING, " we see two meters: the S109 Frequency Meter designed to indicate aircraft power current frequency independently of waveform or voltage level; and the S116 Polyrphase Wattmeter which measures three-phase power on a frequency meter scale using a specially designed current transformer. At the bottom of the image is information about Sangamo Weston Limited including their location in Enfield, Middlesex (UK), suggesting this advertisement likely dates from an era when print was a primary medium for commercial promotion in aerospace industries.
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