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Expired
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Edgar Harry Cockshott
Alfred Walter Maley
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Individual
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Publication of GB190725026ApublicationCriticalpatent/GB190725026A/en
25,026. Cockshott, E. H., and Maley, A. W. Nov. 12. Brakes.-An electro - magnet, which may be bi-polar or multi-polar, used as a track brake on trams and trains, has concentric pole-pieces. Fig. 2 shows a bi - polar magnet, the pole - piece being bolted to the yoke a, in the centre of which is the exciting-coil b. The pole-piece c is divided into a number of poles d. The pole-piece e, of opposite sign, is also bolted to the yoke and has a free end broader than that of the pole-piece c. The poles d pass into a number of holes f in the pole-piece e. The poles d and holes f may be of various shapes in cross-section, and the space between the pole-ends d and the side of the holes f may be partly or wholly filled with stays of non-magnetic material.
GB190725026D1907-11-121907-11-12Improvements in Magnetic Brakes.
ExpiredGB190725026A
(en)
Improvements relating to the mounting of vibrating reeds, more particularly for use in connection with electromagnetic gramophone pick-ups, loud speakers and the like