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Phone Transmitter Parts

On April 27, 1877 Thomas Edison filed a patent application for an improved phone transmitter. Edison’s carbon block telephone transmitter relied on variations in the conductivity of carbon as a result of pressure. Edison's patent claim was declared in interference to a Notice of Invention filed by Emile Berliner two weeks prior. Although the conflict was not resolved for more thn a decade, Edison began producing his transmitter toward the end of 1877. In 1892 a federal court ruled that Edison was the inventor of the carbon microphone.

Mouthpiece - Kellogg Phone
Unit Price: $23.52
Mouthpiece - Western Electric
Unit Price: $23.52
Phone Face Plate
Unit Price: $42.34
Phone Transmitter Cup
Unit Price: $28.25
Transmitter Cup
Unit Price: $28.22