Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 140,069 pages of information and 227,378 images on early companies, their products and the people who designed and built them.
Smith and Grace Screw Boss Pulley Co Ltd. Power Transmission Engineers
of Thrapston, near Kettering, Northants.
of Euston Rd, London (1943) and of Manchester
1867 Won a prize for a grinding machine at the Royal Agricultural Society's meeting
1868. Partnership dissolved. '...the Partnership heretofore subsisting between the undersigned, Nathaniel Smith and Theodore Grace, of Thrapstone, in the county of Northampton, Engineers, Iron and Brass Founders, and Agricultural Implement Makers, has this day been dissolved by mutual consent...'
1869 Patent. '1702. And to Nathaniel Smith, George Smith, and Edwin Smith, all of Thrapston, in the county of Northampton, for the invention of "improvements in the mode of cutting, and skiving leather and other materials, and in means or apparatus employed therein."'
1870 Highly commended for hand-powered chaff cutter at the Royal Agricultural Society's meeting.
1886 Won a medal for Smith's patent convertible belt pulley at the Royal Agricultural Society's meeting; this system allowed one pulley to fit different size shafts
1893 Partnership change. '...the Partnership heretofore subsisting between us the undersigned Nathaniel Smith, George Smith, and Edwin Smith, now carrying on business at Thrapston, in the county of Northampton, under the style or firm of Smith and Grace, as Engineers, Iron and Brass Founders, and Agricultural Implement Makers, was, on the 25th day of January instant, dissolved, by mutual consent, so far as relates to the said Nathaniel Smith only, who retires therefrom...'
1900 Issued catalogue of Smith's patents for transmission of power. Contains details on pulleys, screw bushes, gear wheels, shafting, collars, couplings, plummer blocks, hangers, wall boxes and lubricators. Listed as Smith and Grace of Screw Boss Pulley Company of Thrapston.
1912 The Smith and Grace Screw Boss Pulley Co exhibited pulleys at Olympia
1940 Advert for Veeflat drive transmitting over 1,000 hp and handwheels (Smith and Grace of Thrapston) 
1945 Advert for the 'Essangee' change-speed unit, a machine tool drive for capstans, lathes, millers, slotters etc. (Smith and Grace) 
2000 Smith and Grace Screw Boss Pulley Co was put into Voluntary liquidation