| Share
 

Valdemar Poulsen

Poulsen, Valdemar (välˈdəmär poulˈsən) [key], 1869–1942, Danish electrical engineer. He invented (1898) the telegraphone (an early wire recorder) and the high-frequency Poulsen arc used in wireless telegraphy and radio.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

More on Valdemar Poulsen from Infoplease:

See more Encyclopedia articles on: Electrical Engineering: Biographies

24 X 7

Private Tutor

Click Here for Details
24 x 7 Tutor Availability
Unlimited Online Tutoring
1-on-1 Tutoring