1S17.] [ 535 ] 



PATENTS LATELY ENROLLED. 



To William Evetts SHEFriF.Ln, of 

 the Polygon, Somers Town ; fir divers 

 Improvements in the worhino- or inanu- 

 factnring Copper and its Compounds, 

 and other metallic Stihstances. — Sep. 

 23, 1814. 



MR. Sheffield ileclaies tliat his first 

 improvemeut consists in the 

 working or niaiiufucturing; copper and 

 its compoiuKls, l)y subjecting the same 

 copper or its compounds to the process 

 •f cementation by heat, in a closed ves- 

 sel or furnace, alouf? with charcoal of 

 wood, fossil coal charred, or animal 

 coal, or any other substance, consisting 

 for the most part or pro[)ortion of coaly 

 matter, but in general he gives the pre- 

 ference to the charcoal of wood. ■ His 

 second improvement, consists in work- 

 ing or manufacturing copper, and its 

 compounds, into sound and perfect wire ; 

 and for this purpose he forms the metal 

 into plates, and afterwards, by means of 

 cutting and rounding cylinders, having 

 edges opposite, or very nearly opposite, 

 divides the said metal into round or 

 rounded pieces, without producing any 

 flexure, or over-lapping of the edges; 

 and he then proceeds to draw down the 

 metal into wire of the size required to be 

 made. 



To Thomas Ruxton, of Dublin, esq.; 



for a Lock for fastening Doors, Sfc, 



—May 14, 1816. 



The lock and key have, in common 

 with many others, the properties of 

 strength, neatness, durability, lightness, 

 convenience of form and simplicity; 

 they require no knack or peculiar dex- 

 terity, cause no trouble, and are not apt 

 to get out of order. The following are 

 among other more important properties 

 which this lock possesses: — 1. An at- 

 tcni[(t to violate it must fail. — 2. An 

 attempt to violate it must be detected. 

 -^And, 3, it is as little violabic by the 

 maker of it as by any other person. 

 • 'J he person making the attempt must, 

 in order to succeed, first construct a 

 false instrument, that will pass the wards 

 of the lock. Then he must ascertain the 

 number of tumblers, whose edges present 

 an even surface to the false instrument. 

 Next, he must find out of the twenty- 

 four permutations, (which four tumblers 

 admit) the particular permutation em- 

 ployed. He must, further, ascertain 



the precise distance to which each of 

 the three tumblers intended to be stirred 

 is to be moved. If any one of thcso 

 three be moved more, by a hair's- 

 breadth, or be moved less, by a hair's- 

 4jreadth, than its right distance, or 

 should ihe fourth tumbler be moved at 

 all, even a hair's-breadlh, he cannot 

 succeed. Resides, these discoveries ar« 

 to be made at a spot which lie cannot 

 see, which is much confined; and be- 

 tween which and tlio key-hole ar« 

 several impediments. 



To William Wood, of Shadwell; for 

 the Mamfactiire ofn Material or Ma- 

 terials, and the Application thereof to 

 the more effectnally making' vater- 

 tightandsea-iforlhif Ships, andallother 

 Vessels.— M-Arch 9, 1815. 

 IVFr. Wood's invention consists in th« 

 application of sheets or flat pieces of felt, 

 manufactured and prepared according to 

 the hereinafter-contained description, to 

 ships and other vessels, for the purpos* 

 of preventing leakage, and so to effect 

 the better preservation of the said ship 

 and other vessels, and (he good condi- 

 tion of their cargoes. I'or these pur- 

 poses he takes hair, wool, cotton, or 

 other materials which have the property 

 of felting, which he manufactures into 

 sheets or pieces of the size of about three 

 feet in length, by a width of about six- 

 teen inches, which is the size that iu 

 practice is the most convenient to ap- 

 ply to the object to be covered with these 

 sheets. 



Others Patents lafclti gravtrd, of which we 

 solicit the Spicijications. 



John Hawkins Barlow, of Leicester- 

 place, Leicester-square, Miildlesex, gold- 

 smith and jeweller; for certain improve- 

 ments on tea-itrus, tea pots, tea-boards, or 

 tea-trays. — June 27, liilS. 



John IJarlow, of Slieffield, Yorkshire, 

 founder ; for a new cooking apparatus. — 

 July e. 



John Toweks, of Little Warner-street, 

 Cold Bath-ficlds, Middlesex, chemist; for 

 a tincture for the cure and relief of 

 coughs, asthmas, and diseases, which he 

 intends to denominate " Towers's New 

 London Coti;;li Tincture." — July 11. 



M'ji.LiAM Henry, of Manchester, doc- 

 tor of physic ; for improvements in the 

 niauufjcture of sulphate of niasjncsia, com- 

 monly called Epsom salts. — August 3. 



John Poole, of Sheffield, victualler ; 

 for brass and copper plating, or plating 



iron 



