United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 111
iece, a col-lapsible portion, tapered means carried bysaid mouthpiece for expanding the collapsibleportion, and inclined rails carried by said col-lapsible portion in position for engagementby said expanding means, substantially asdescribed. In testimony whereof I affix my signaturein presence of… … 7/^*. WITNESSES;
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents], 1878, leaf 111](https://img.insideoutlibrary.com/img/1024/ia-graphophonepaten07unit-111-91.webp)
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer01inte-406-158.webp)