Edison’s First Phonograph Restored to Original Form (After 1
Posted: Tue Mar 13, 2018 1:40 pm
The Thomas Edison National Historical Park just came out with an emailed newsletter that is not yet online. This update was the one I was most interested in seeing:
I wrote about this mouthpiece in the December 2017 issue of The Antique Phonograph. It's great to see the original Kruesi prototype completed and displayed as it looked in December 1877.Edison’s First Phonograph Restored to Original Form (After 140 Years)
Curators recently installed a new replica mouthpiece onto Thomas Edison’s first phonograph. Historian David Giovannoni of Derwood, Maryland, led the effort to recreate the mouthpiece. Giovannoni collaborated with machinist Anton Stoelwinder to design replica parts, made of gutta-percha and brass. Stoelwinder custom-built the parts at his workshop in Gorredijk, Netherlands. (Above and center, the original phonograph on display in the Phonograph Gallery on the third floor of Building 5.)
Edison first conceived of the phonograph at his Menlo Park, New Jersey, Laboratory during July of 1877, and experimented with designs during the fall and winter. Machinist John Kruesi built the phonograph in early December 1877. Its original mouthpiece is long lost, but there is no doubt that one once existed on the machine. The mouthpiece attached to the recording element of the phonograph. To make a recording, Edison spoke directly into it. It helped ergonomically to channel sound pressure onto the recording diaphragm.
The best evidence of the mouthpiece design is a period engraving (bottom, left) of the phonograph published in Scientific American magazine on December 22, 1877. Similar mouthpieces appear in Edison’s 1877-1878 drawings of experimental phonographs, including United States patent 200,521.