The first radio telephone transmitting and receiving set which was installed on Commodore Huntington's yacht "Thelma" at Put-in-Bay, Ohio in 1907. The audion box on left with pan-cake turner above the large transmitting case was the first...
De Forest, Lee, 1873-1961; Owen, Freeman; Men; Cameras
Written on back of photograph, "Dr. De Forest with his laboratory assistant, Freeman Owen. Dr. De Forest's little tube made possible the recording of sound waves (1923) Phonofilm-Glowlight." Photo shows De Forest and Owen with a tube and...
Young woman seated, reading book. Nearby is a baby carriage rigged with what appears to be an antenna and megaphone. Woman may be Mrs. Charles Herrold.
Eitel, W. W.; McCullough, J. A.; Eitel-McCullough, Inc.; Men; Buildings; Automobiles; San Carlos (Calif.);
Printed on the photograph: "W. W. Eitel (left), President and J. A. McCullough, Executive Vice President, co-founders of Eimac in 1934, are shown in front of a new 150,000 square foot manufacturing plant and corporate headquarters in San...
Federal Telegraph's Engineering staff, 1917. Left to right are: Leonard Fuller, Harold Elliot, Corwin Chapman, Kurt Bley, Ralph Beal and Adrien Anderson.
Klystron development took place in this laboratory. The tubes are the highest objects on the table, vacuum pumps are below. After 17 months work the invention was announced to the public, 1939.
