United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 309
ause said nutto engage the thread on said shaft, means forpreventing said cup from turning when said 35sound-reproducer is in contact with a record,and means for tripping said pivoted arm,trigger and swinging nut so as to throw thelatter out of engagement with the threads ofthe central shaft when… … 9 & 10
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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