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All Patents of Type: drop hammers
Patents 1 - 15 of 64
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NumberDatePatenteeTitleType
GB-163,400,071Jun. 24, 1634A. RotsipenInstruments for cutting, polishing, filing, turning, boring, grinding, sawing, and planing metals for cutting screws, for making files and bullets, for making and rifling barrels, for pressing or printing, and a hammer moved by water or horse powerscrew machines
27,925Apr. 17, 1860M. PeckAtmospheric Hammerdrop hammers
52,894Feb. 27, 1866T. ShawPower Hammerdrop hammers
RE2,398Nov. 27, 1866T. ShawPower Hammerdrop hammers
68,740Sep. 10, 1867T.B. HarrisonPower Hammerdrop hammers
78,867Jun. 16, 1868J. DuffDrop Hammerdrop hammers
78,933Jun. 16, 1868D. DavySteam Balanced Valvedrop hammers
88,980Apr. 13, 1869T.T. ProsserImproved power-hammerdrop hammers
108,326Oct. 18, 1870J. Hay, J.C. ButterfieldImprovement in trip-hammersdrop hammers
RE4,470Jul. 18, 1871J. Hay, J.C. ButterfieldImprovement in trip-hammersdrop hammers
144,058Oct. 28, 1873J.C. ButterfieldImprovement in power-hammersdrop hammers
144,059Oct. 28, 1873J.C. ButterfieldImprovement in power-hammersdrop hammers
153,534Jul. 28, 1874J.C. ButterfieldImprovement in trip-hammersdrop hammers
156,276Oct. 27, 1874J.C. ButterfieldImprovement in power-hammersdrop hammers
160,483Mar. 02, 1875N.C. StilesDrop Hammerdrop hammers
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