Sheffield H. Wright Improvement in Machines for Threading Bolts - DPLA - 3e71ffda9ad1daae2a55352bf64826eb (page 1)SimilarGeorge C. Tuft's Improvements in Drills - DPLA - d2e20267b2bf0df0b8ec6e833418041a (page 1)Patent Drawing of Engine - Drawing for a Phonograph Public domain imageSteam engines and boilers, Indiana - f3af8dde7e8606f36c4d551b71e670f7 (page 4)PSM V20 D324 Distributing clock of the pneumatic systemK. Vogel Sewing-Machines for Button-Holes - DPLA - a9380537da143d343cbfc84222f3af72 (page 3)Leonard Atwood Improvement in Valve Gear for Engines - DPLA - 2ef0cc37ae462bfe522d8442bb7288cf (page 1)MoreRelatedHenry Ward Beecher - 79fc85735c37df0e5021e5349a65692b (page 1)Winfield Scott Hancock? - 113f21d11fce38bfda84d89427e967b2 (page 1)Henry Clarke Wright - 822287a85a7e7b8a25bfa82c2c3b6d1f (page 1)Wendell Phillips - fe3fd1de8701fa7e77ec9137b7bde252 (page 1)Henry Ward Beecher - 09348c96c8fd3f22be5b194c91dae71d (page 1)Isaac H. Folger - 773c85807bc9926964860e9ba24d2563 (page 1)MoreSheffield H. Wright Improvement in Machines for Threading Bolts - DPLA - 3e71ffda9ad1daae2a55352bf64826eb (page 1)file_downloadDownloadcrop_originalOrder Printrate_reviewdescriptionSummarylabel_outlineTagspatent drawingstechnical diagramshigh resolutiondate_rangeDate03/10/1871linkLinkhttp://commons.wikimedia.org/copyrightCopyright infoPublic Domain