https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=84160&pn=185,901,088 New or improved pulley Patentee: Thomas Aldridge Weston - King's Norton, county Worcester England Granted:1859-04-25
Manufactured by Tangye Brothers - Birmingham, county Warwick England

The innovation is a chain-and-pulley arrangement where the lifting force is inversely proportional to the difference in diameter of two pulleys, which are fixed to one another on the same shaft. Making the pulleys very close in size allows a very heavy load to be lifted by hand, and the friction in the mechanism is sufficient to prevent the load from falling under its own weight. A long loop of chain is wrapped around the two pulleys so that two loops of chain hang down. A third pulley is placed at the bottom of one of the loops and the load is attached to the body of that pulley. The remaining loop is used by the operator to raise or lower the load. The inventor exhibited an "Improved pulley block and lifting apparatus" at the 1862 International Exhibition in London. In 1864 he sold the patent rights to Tangye Brothers, who solved two key issues with Weston's invention: chain links were inconsistent in size and would not reliably wrap around a pulley designed to accept chain, and were also prone to getting wedged into the pulley block. Tangye Brothers developed a chain-link designed to easily disengage from the teeth of the pulley, and refined their production methods to produce links of consistent size. See also patent GB-186,502,931 for additional improvements.
This is one of 85,393 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85306&pn=190,209,859 Improvements in implements for stripping insulation from wire Patentee: Clarence C. Sibley - Perth Amboy NJ Granted:1903-01-01
Manufactured by Amboy Works - Perth Amboy NJ

This "Climax Wirescraper" patent is the British equivalent of US patent 698,567.
This is one of 85,393 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=86104&pn=879,430 Drill attachment Patentee: Walter H. Adams - Sound Beach, Fairfield County CT Granted:1908-02-18

This attachment allows a breast drill, or other hand drill, to be held in an adjustable but steady position relative to the workpiece. Another drill-related patent to the same inventor, 841,758, is known to have been manufactured by Walter H. Adams. A partial example of this drill steadying attachment is reported but the manufacturer is unknown.
This is one of 85,393 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=21109&pn=AI279 Hollow auger Patentee: Mahlon Gregg - Philadelphia PA Granted:1860-05-15

Only the patent drawing is available. "Additional Improvement" patents were issued between 1836 and 1860 to allow patentees an easier way to make additional claims, improvements or clarifications. This drawing shows a hollow auger intended to be used with Gregg's Machine for Cutting Tenons on Spokes. A couple of examples have been seen. One example, made in brass, is marked "SCHMIDT / BALT". An 1870 Baltimore City Directory lists George P. Schmidt, 4 Etna Lane, as a brass and bell founder, and is the only remotely plausible candidate we can find. This identification is not solid enough to list him as the manufacturer, though.
This is one of 85,393 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=15072&pn=1,650,863 Double-belt sanding machine Patentee: Emil F. Butts - Tacoma WA Granted:1927-11-29
Manufactured by Gregory-Butts Co. - Tacoma WA
Assigned to Gregory-Butts Co. - Tacoma WA


This is one of 85,393 patents currently in the database at datamp.org

]]>