{"id":646,"count":1,"description":"The diaphone was a noisemaking device best-known for its use as a foghorn: it could produce deep, powerful tones able to carry a long distance. Diaphones were also used at some fire stations and in other situations where a loud audible signal was required.\nThe diaphone horn was based directly on the organ stop of the same name invented by Robert Hope-Jones, creator of the Wurlitzer organ. Hope-Jones' design, based on the vibrations in air created by a slotted piston moving within a correspondingly slotted cylinder, was adapted and patented by Professor John Pell Northey of the University of Toronto, who added a secondary compressed air supply to the piston to power it on both forward and reverse strokes and create an even more powerful sound. The entire horn apparatus was driven by a compressor.\nTo manufacture the new equipment, Northey set up the Diaphone Signal Co. at Toronto in 1903. It manufactured a range of diaphone models: the large \"Type F\", which created a tone of about 250...","link":"https:\/\/www.visualbeatz.de\/?tag=diaphone","name":"Diaphone","slug":"diaphone","taxonomy":"post_tag","meta":[],"_links":{"self":[{"href":"https:\/\/www.visualbeatz.de\/index.php?rest_route=\/wp\/v2\/tags\/646","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.visualbeatz.de\/index.php?rest_route=\/wp\/v2\/tags"}],"about":[{"href":"https:\/\/www.visualbeatz.de\/index.php?rest_route=\/wp\/v2\/taxonomies\/post_tag"}],"wp:post_type":[{"href":"https:\/\/www.visualbeatz.de\/index.php?rest_route=%2Fwp%2Fv2%2Fposts&tags=646"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}