Magnetic Recording: The First 100 YearsEric D. Daniel, C. Denis Mee, Mark H. Clark Electrical Engineering/History of Technology Magnetic Recording The First 100 Years The first magnetic recording device was demonstrated and patented by the Danish inventor Valdemar Poulsen in 1898. Poulsen made a magnetic recording of his voice on a length of piano wire. Magnetic Recording traces the development of the watershed products and the technical breakthroughs in magnetic recording that took place during the century from Poulsen’s experiment to today’s ubiquitous audio, video, and data recording technologies, including tape recorders, video cassette recorders, and computer hard drives. An international author team brings a unique perspective, drawn from professional experience, to the history of magnetic recording applications. Their key insights shed light on how magnetic recording triumphed over all competing technologies and revolutionized the music, radio, television, and computer industries. They also show how these developments offer opportunities for future applications. Magnetic Recording features 116 illustrations, including 92 photographs of historic magnetic recording machines and their inventors. |
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Page 16
... patent application on December 1 , 1898 , Poulsen had designed a more sophisticated machine that looked much like Edison's first phonograph . It recorded sound well enough to permit Poulsen to use it to con- vince Danish patent ...
... patent application on December 1 , 1898 , Poulsen had designed a more sophisticated machine that looked much like Edison's first phonograph . It recorded sound well enough to permit Poulsen to use it to con- vince Danish patent ...
Page 17
... patent applica- tion ( U.S. Patent 661,619 ) . The vertical cylinder was covered with a wire spiral , which acts as the recording medium . The recording head moved around the cylinder . RESEARCH , DEVELOPMENT , AND THE GERMAN ...
... patent applica- tion ( U.S. Patent 661,619 ) . The vertical cylinder was covered with a wire spiral , which acts as the recording medium . The recording head moved around the cylinder . RESEARCH , DEVELOPMENT , AND THE GERMAN ...
Page 28
... Patent 1,640,881 . The patent covered the application of ac bias to the record- ing of telegraph signals only , not sound . As a result , ac bias for voice and music recording was later discovered and patented separately . Despite the ...
... Patent 1,640,881 . The patent covered the application of ac bias to the record- ing of telegraph signals only , not sound . As a result , ac bias for voice and music recording was later discovered and patented separately . Despite the ...
Contents
AUDIO RECORDING | 6 |
The Telegraphone | 15 |
Steel Tape and Wire Recorders | 30 |
Copyright | |
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Magnetic Recording: The First 100 Years Eric D. Daniel,C. Denis Mee,Mark H. Clark Limited preview - 1998 |
Common terms and phrases
ac bias Ampex analog applications areal density audio recording b/in bandwidth BASF bit density broadcast capacity capstan cartridge channel coating color compact cassette consumer cost Courtesy of IBM data rate data recording data storage developed device diameter digital audio digital recording digital video recording disk drive disk surface diskette early electronic engineers equipment error ferrite Figure film frequency hard disk helical-scan improved inches industry instrumentation recorder Jack Mullin Japan laboratory machine magnetic disk magnetic drum magnetic recording magnetic tape Magnetophon manufacturers Mb/s mechanism memory Model modulation operation Panasonic performance personal computer playback Poulsen production quadruplex radio RAMAC read/write recording format recording medium recording system recording technology reel rotating slider SMPTE Sony sound standard stored t/in tape drive tape systems Telegraphone television tion track density United video cassette recorder video signal video tape recorder wire