Sujet
Electrical apparatus for the clock-tower light, Houses of Parliament, 1873. Creator: Unknown.
Légende
Electrical apparatus for the clock-tower light, Houses of Parliament, [London], 1873. 'Few recent inventions of science are more remarkable than M. Gramme's electric light. Frequently during the past Session of Parliament its wonderful beam has been seen in midair, cast from the noble clock-tower of the New Palace at Westminster. This beautiful light, which shone conspicuously from its eyrie 260 ft. above the streets...was supplied by the electric current from a small machine requiring only 21-horse power to drive it...view [showing] the...general arrangements by which the light is intensified and is rendered independent in its regularity of any defects in the quality or continuance of the carbon points. The optical apparatus consists of a circular holophote,...made by Messrs. Chance...Its purpose is to parallelise the rays emanating from the carbon points, and so to intensify the light in the form of a beam. When the Gramme light takes its permanent station in the clock-tower the holophote will be supplanted by one of Messrs. Chance's optical "beehives," by which the wonderful light will be spread out and around through an arc of 180 deg., and the streets below will then be lit up in a far more uniform and effective manner'. From "Illustrated London News", 1873.
Crédit
Photo12/Heritage Images/The Print Collector
Notre référence
HRM25A13_285
Model release
NA
Property release
NA
Licence
Droits gérés
Format disponible
7,8Mo (875,1Ko) / 14,9cm x 13,1cm / 1754 x 1552 (300dpi)