2 Matching Results

Search Results

Advanced search parameters have been applied.
in creator/contributor: "McKinney, James R."  
Results: 1 - 2

Telephone-Transmitter.

Description: Patent for a granulated-electrode phone transmitter that is designed to be simple and "constructed so that the granulated-electrode cannot become displaced from the cell" (lines 10-12).
Date: May 11, 1897
Creator: Alexander, Horace C.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Telephone-Transmitter.

Description: Patent for a telephone-transmitter "with a diaphragm and carbon button carried thereby, of a spring-supported flaring conical carbon-cell provided with a flange covered with soft material and resting on the carbon button carried by the diaphragm, the carbon-cell being filled with granulated carbon resting in contact with the carbon button" (lines 13-19). This is meant to optimize the volume of sound being transmitted.
Date: October 20, 1896
Creator: Alexander, Horace C.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
Back to Top of Screen