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Proceedings of the IEE - Part I: General

Volume 97, Issue 105, May 1950

Volumes & issues:

Volume 97, Issue 105

May 1950

Radar echoes from meteorological precipitation
  • Author(s): J.E.N. Hooper  and  A.A. Kippax
  • Source: Proceedings of the IEE - Part I: General, Volume 97, Issue 105, p. 89 –95
  • DOI:  10.1049/pi-1.1950.0028
  • Type: Article
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  • p. 89 –95 (7)
    Experiments, using radar sets operating on wavelengths of 9.1, 3.2 and 1.25 cm, are described, the results of which confirm the theoretical dependence of radar echo power on drop-size distribution, pulse energy and wavelength. Measurements of the echo intensity of a “bright band”, which appears within echoes from rain at a height a little below the freezing level, are reported, and an explanation of the phenomenon is offered. Some of the uses to which observations of radar echoes from precipitation may be put are mentioned briefly.
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Discussion on “Radar echoes from meteorological precipitation” before the Institution, 12th January, 1950
The author's reply to the discussion on “Radar echoes from meteorological precipitation”
Electrical weighing
  • Author(s): H.I. Andrews
  • Source: Proceedings of the IEE - Part I: General, Volume 97, Issue 105, p. 98 –109
  • DOI:  10.1049/pi-1.1950.0031
  • Type: Article
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  • p. 98 –109 (12)
    While measurements of weight can usually be made with accuracy using conventional apparatus, difficulty is experienced on moving vehicles, in enclosed or remote positions, or where the object to be weighed forms part of a working system. For such circumstances an electrical weighing apparatus has been developed comprising one or more small elements, having negligible deflection under load, from which a small voltage can be obtained proportional to the weight supported, together with an electronic voltage indicator. Weighing elements giving outputs of 0.1–0.3 volt are described, and their design limits and maximum sensitivity are considered. The outputs of a number of such elements can be summed, any desired amount of the weight supported can be “counterbalanced out”, and the effects of parasitic motion of a vehicle can be eliminated, by electrical means. The principle has also been applied to the measurement of pressure.As an illustration, the determination of the weight of unburnt fuel on the grate of a steam locomotive in service is described.
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Discussion on “Electrical weighing” before the Institution, 3rd November, 1949
The author's reply to the discussion on “Electrical weighing”
Discussion on “Tidal power and the Severn Barrage” before the South Midland Centre, at Birmingham, 7th February, 1949
The author's reply to the discussion on “Tidal power and the Severn Barrage”
Meetings of the Institution: abridged minutes

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