• Thumbnail for Sylvester H. Roper
    Francestown, N.H., pp. 317, 903–904{{citation}}: CS1 maint: location missing publisher (link) "Died; Roper – At Cambridge. 1st inst., Sylvester H. Roper, 72 yrs...
    15 KB (1,299 words) - 17:50, 22 March 2024
  • Thumbnail for Roper steam velocipede
    The Roper steam velocipede was a steam-powered velocipede built by inventor Sylvester H. Roper of Roxbury, Boston, Massachusetts, United States sometime...
    28 KB (2,810 words) - 04:53, 29 August 2024
  • Thumbnail for Horseless carriage
    Transport. In the United States, a four-wheel steam carriage was made by Sylvester H. Roper in 1863. The 1896 Armstrong horseless carriage is notable as an early...
    5 KB (444 words) - 14:04, 8 October 2024
  • Thumbnail for Motorcycle
    constructed around the same time as the American Roper steam velocipede, built by Sylvester H. Roper of Roxbury, Massachusetts, who had been demonstrating...
    77 KB (7,068 words) - 00:24, 21 October 2024
  • technological innovation that they invented or designed. Sylvester H. Roper (1823–1896), inventor of the Roper steam velocipede, died of a heart attack or subsequent...
    28 KB (2,982 words) - 19:24, 11 October 2024
  • Thumbnail for List of shotguns
    RMB-93 KBP Instrument Design Bureau 12 gauge  Russia 1993 Roper repeating shotgun Sylvester H. Roper 12 gauge 16 gauge  United States 1867 Ruger Gold Label...
    21 KB (126 words) - 13:38, 31 October 2024
  • Thumbnail for Christopher Miner Spencer
    Christopher Miner Spencer (category Articles with hCards)
    while at the Roper Repeating Arms Company in Amherst, Massachusetts, he worked with Charles E. Billings, and Sylvester H. Roper. After Roper's firearms company...
    5 KB (595 words) - 03:53, 2 April 2024
  • Thumbnail for History of steam road vehicles
    cylinders were coupled directly outside the cranks of the driving-axle. Sylvester H. Roper drove around Boston, Massachusetts on a steam car he invented in 1863...
    42 KB (5,185 words) - 22:00, 27 May 2024
  • List of deaths by motorcycle crash (category Articles with hCards)
    Giora Tzahor, Krisztián Veréb, Emili Vicente, Sanchari Vijay 1896 Sylvester H. Roper Cambridge, Massachusetts. Crash preceded by or followed by heart failure...
    20 KB (822 words) - 15:50, 25 August 2024
  • Thumbnail for Choke (firearms)
    back as 1827. The first known patents for choke boring were granted Sylvester H. Roper, an American inventor and gunsmith. This was followed by a patent...
    24 KB (3,025 words) - 05:55, 27 August 2024