Search Results for: Transmission apparatus
continuous sounds produced from pianoforte strings or springs, by means of currents of air which pass through apertures slightly wider than the body the air vibrates. aug. , w, southwell. spring applied to hammer butt, to obtain repetition. feb. , johann stumpff. improvements in mechanism and tuning apparatus
waddington. the ribs or bars ii front, instead of at the back, of the sounding board. may , . g. thomas. bracings dovetailed into the body of the wrest plank. may , j. harrison. metallic wrest plank and improved lever. aug. , w. s. smith. rounded bridges with plates of metal. oct. , . f. delsarte. apparatus...
https://www.piano-tuners.org/history/patents.html
broadcasting columbia phonograph records on pioneering new york station xg,in . [ ] the british broadcasting corporation's landmark and iconic london headquarters, broadcasting house , opened in . at right is the eastern extension, the john peel wing. it is generally recognized that the first radio transmission
in buenos aires, on august , , in charge of the radio argentina society of enrique susini , césar guerrico, miguel mugica, luis romero and ignacio gómez, who installed a transmitting device on the roof of the building, for which they are remembered as "the crazy people on the roof". in , the transmission...
https://en.wikipedia.org/wiki/History_of_broadcasting