https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=85281&pn=3,724 Improvement in the Art of Pattern Making for Castings in Iron or other Metals Patentee: Ezra Ripley - Troy NY Granted:1844-08-31

No drawing; the specifications describe a multi-stage process for obtaining reusable casting patterns for relatively thin plates and cast hollow-ware. A blog post on the history of stove making notes Ripley was advertising his "new process" in 1843. Ripley (ca. 1797 - 1873 ) is remembered for his role in the design and production of ornamental stoves, etc. He also designed and patented tools and other cast iron articles.
This is one of 84,578 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=6033&pn=683,794 Angle bit-stock Patentee: Henry Politsch - Gloversville NY Granted:1901-10-01


This is one of 84,578 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=5894&pn=319,430 brace or drill with alternating rotation Patentee: Charles Snedekum - Bat City MI Granted:1885-06-02


This is one of 84,578 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=8503&pn=157,099 Improvement in hand-drills for drilling metal Patentee: Donald D. MacKay - Whitestone NY Granted:1874-11-24


This is one of 84,578 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=41820&pn=922,371 Boring Machine Patentee: Randolph Winkler - Covington KY Granted:1909-05-18

Munn & Co.- patent attorneys The primary object of the invention is to provide a boring machine which is free from clamps or levers, which would conflict with the brake connections, camber rods and floating levers such as are customary in freight cars. It is a further object of my invention to provide a boring machine which may be held in position by the knees or legs of an operator sitting underneath the car, thereby enabling him to use both hands to drive the bit, or else use one hand to drive the bit and one to produce lever pressure. A further object is to provide a boring machine with removable handles and removable pressure-sustaining devices, so that one side of the boring machine may be entirely free from any lateral projections.
This is one of 84,578 patents currently in the database at datamp.org

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