Hughes published his work during the time that Thomas Edison was working on a carbon telephone transmitter and Emile Berliner was working on a loose-contact transmitter.
12.
An Italian prosecutor has charged three Vatican officials with damaging the environment, saying Vatican Radio violates the standards on electromagnetic fields emitted by radio stations and telephone transmitters.
13.
The Brazilian government yesterday said it will remove the average 20 percent tariff on imported components of wireless telephone transmitters for a limited time to promote domestic manufacturing.
14.
An Italian prosecutor has charged three Vatican officials with damaging the environment, saying Vatican Radio violates strict Italian standards on electromagnetic fields emitted by radio stations and telephone transmitters.
15.
The station used a huge antenna supported by eight steel masts, similar to the AT & T long wave telephone transmitter at RCA's Rocky Point, Long Island, transmitter facility.
16.
:The term " microphone " for a telephone transmitter based on imperfect, variable resistance contact between carbon pieces or even metallic contacts, is credited to David E . Hughes.
17.
The station used a huge antenna supported by eight steel masts, similar to the AT & T long wave telephone transmitter at RCA's Rocky Point, Long Island transmitter facility.
18.
Three top Vatican Radio officials are scheduled to go on trial next month for allegedly violating Italy's very strict standards on electromagnetic fields emitted by radio stations and telephone transmitters.
19.
Bell's telephone transmitter ( microphone ) consisted of a double electromagnet, in front of which a membrane, stretched on a ring, carried an oblong piece of soft iron cemented to its middle.
20.
It was claimed to be more sensitive than the carbon button telephone transmitter earlier invented by Thomas Edison, or the imperfect metallic contact transmitter of Berliner, both patented and demonstrated and widely written up in 1877.
