Union Stone Co. - Assigned Patents | VintageMachinery.org

Manufacturers Index - Union Stone Co.

Union Stone Co.
Worcester, MA; Boston, MA, U.S.A.
Manufacturer Class: Metal Working Machinery

Patents

This page contains information on patents issued to this manufacturer.

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Patent Number	Date	Title	Name	City	Description
53,092	Mar. 06, 1866	Improved composition to be used as a cement and as a plastic material for molding various articles	Stanislas Sorel	, France	This method of producing composition products was used by the Union Stone Co. to produce emery wheels, hones, etc., plus artificial soapstone for making various decorative items. See also patent 100,944.
100,944	Mar. 15, 1870	Improvement in the manufacture of cement for artificial stone	Stanislas Sorrel	, France	This is an improvement on patent 53,092. The improvement is a method of using magnesite rather than the previously-used manufactured magnesia that was derived from magnesian limestone or dolomite. "Large deposits of magnesia have been recently discovered in the United States, both east and west, and it can be used in many places with economy for my purposes."
100,945	Mar. 15, 1870	Improvement in the manufacture of artificial stone	Stanislas Sorrel	, France	This is an improvement on patent 53,092.
102,218	Apr. 26, 1870	Improvement in oil-stone holders	Homer Brown	Hamilton, IL	"This invention relates to improvements in holders for oil-stones; and consists of a pair of cast-metal plates, with pointed feet to use on the bench so as not to slip, arranged to clamp the ends of the stone at the top, and provided with a clamping-rod and screw between the top and bottom, and a brace below the rod, to cause the clamping force on the ends of the stone when the plates are secured up to the ends of the stone and the brace by the rod and its nut. The said plates are provided with flanges for the bottom of the stone to rest on, and sockets for confining the ends of the brace..." An example is reported, with the only marking being "PATENTED APRIL 26 1870" cast into one end.
107,017	Sep. 06, 1870	Improved brick-machine	Josiah S. Elliott	Boston, MA
110,102	Dec. 13, 1870	Improvement in the manufacture of emery-wheels	John F. Wood	Boston, MA	"The process of manufacturing emery-wheels under this invention is as follows: I take the ordinary composition for emery-wheels as prepared and mixed ready for the mold. I place in the center of the mold a wooden disk, filling all the mold, except so much of the circumference as is designed to be of emery-stone. Into the space thus left the emery composition is pressed, rammed, or tamped in the ordinary way. The wooden disk is then removed, and, before the composition sets, the center space is filled with composition for artificial stone, prepared in the ordinary way, and this is pressed, rammed, or tamped, and the whole is allowed to set and harden, and thus a solid wheel is formed. "I am aware the centers of iron have been used in emery-wheels; but they are more expensive than those of artificial stone, and cannot be made to unite so perfectly as the artificial stone and emery in my process. "The danger of throwing off the circumference of large wheels at great velocity requires that the whole be firmly cemented in one mass, which is hardly practicable with an iron center, but is easy by my process; and, again, the danger of fracture of the wheels by the unequal expansion of iron and emery-stone by heat is avoided by this invention."
110,023	Dec. 13, 1870	Improvement in machines for mixing the materials to form artificial stone, &c.	Josiah S. Elliott	Boston, MA
111,921	Feb. 21, 1871	Improvement in machines for forming artificial stone	Josiah S. Elliott	Boston, MA
124,557	Mar. 12, 1872	Improvement in the manufacture of imitation marble	John F. Wood	Everett, MA
		Improvement in the manufacture of imitation marble	Josiah S. Elliott	Chelsea, MA
124,558	Mar. 12, 1872	Improvement in the manufacture of millstones	John F. Wood	Everett, MA
		Improvement in the manufacture of millstones	Josiah S. Elliott	Chelsea, MA
124,559	Mar. 12, 1872	Improvement in processes of repairing millstones	John F. Wood	Everett, MA
		Improvement in processes of repairing millstones	Josiah S. Elliott	Chelsea, MA
125,385	Apr. 09, 1872	Improvement in composition-stones for smut-machines	John F. Wood	Everett, MA
		Improvement in composition-stones for smut-machines	Josiah Elliott	Chelsea, MA
125,390	Apr. 09, 1872	Improvement in cements for artificial stones	J. Andrew Henshaw	Cambridge, MA
126,041	Apr. 23, 1872	Improvement in machines for grinding wood-pulp for paper, &c.	John F. Wood	Everett, MA
		Improvement in machines for grinding wood-pulp for paper, &c.	Josiah S. Elliott	Chelsea, MA
126,042	Apr. 23, 1872	Improvement in composition-stone frames for hot-air registers	John F. Wood	Everett, MA
		Improvement in composition-stone frames for hot-air registers	Josiah S. Elliott	Chelsea, MA
126,121	Apr. 23, 1872	Improvement in compositions for rendering safes, vaults, &c., fire-proof	John F. Wood	Everett, MA
128,218	Jun. 25, 1872	Improvement in inkstands from composition stone	John F. Wood	Everett, MA
		Improvement in inkstands from composition stone	Josiah S. Elliott	Chelsea, MA
131,010	Sep. 03, 1872	Improvement in composition grave-stones, monuments, &c.	Edward A. Locke	Boston, MA
133,513	Nov. 26, 1872	Improvement in composition covers for coal-holes	John W. Wood	Everett, MA
RE5,401	May. 13, 1873	Improvement in machines for forming building-blocks	Josiah S. Elliott	Chelsea, MA
151,788	Jun. 09, 1874	Improvement in Saw Gummers	John H. Martin	Williamsburg, NY	This saw gummer was manufactured by Union Stone Co. of Boston. The assignee, John F. Wood, was the treasurer and owner of that business. The bottom ad on this page mentions that they made saw gummers. http://owwm.com/mfgindex/imagedetail.aspx?id=1996
158,173	Dec. 29, 1874	Improvement in belt-shifters	Amos W. Proctor	Billerica, MA
		Improvement in belt-shifters	Charles H. Hill	Billerica, MA
158,172	Dec. 29, 1874	Improvement in machine for grinding knives	Amos W. Proctor	Billerica, MA
		Improvement in machine for grinding knives	Charles H. Hill	Billerica, MA
218,847	Aug. 26, 1879	Improvement in journal-boxes for shafts of stone-crushers	John F. Wood	Boston, MA
227,402	May. 11, 1880	Treatment of emery-wheels	John F. Wood	Boston, MA	The invention is a method of waterproofing emery wheels using paraffin, a process necessary for wheels to be used for making paper pulp.
290,619	Dec. 18, 1883	Combined knife-brick box and grinder	John F. Wood	Boston, MA
525,799	Sep. 11, 1894	Device for balancing rotating parts	George W. Rymes	Newton, MA