![]() ![]() ![]() The disc valve, developed by John Shaw of Glossop in Derbyshire in collaboration with the Köhler firm in London, had its precursor in the swivel valve, patented in 1838. The transition from the swivel to the disc valve can be traced in another trumpet in New York and reports in the Practical Mechanic & Engineer's Magazine.īiographical information about Shaw shines light on his possible involvement in the manufacture of the only surviving swivel-valve trumpet at The Metropolitan Museum of Art in New York. The technological development of Köhler disc-valve instruments is put in chronological order, based on an examination of surviving instruments and 1851 Great Exhibition catalogues. ![]() JalanTikus adalah website teknologi berbahasa Indonesia yang menyajikan informasi gadget, game Android, iOS, film, anime dan informasi teknologi lainnya. Using contemporary and modern reports as well as acoustical analysis, an assessment of the quality of the disc valve is given.
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