"Rarified Air"
Posted: Tue Mar 17, 2026 8:55 am
“On This Day in the History of Recorded Sound…”
March 17, 1892: Leon F. Douglass filed for a U.S. patent for “Method of and Means for Duplicating or Transferring Phonographic Records.” This involved simply attaching the reproducer of one phonograph to the recorder of another phonograph with a squeezed rubber tube, resulting in a partial vacuum (“rarified air”).
https://www.antiquephono.org/#/
March 17, 1892: Leon F. Douglass filed for a U.S. patent for “Method of and Means for Duplicating or Transferring Phonographic Records.” This involved simply attaching the reproducer of one phonograph to the recorder of another phonograph with a squeezed rubber tube, resulting in a partial vacuum (“rarified air”).
https://www.antiquephono.org/#/