^9. 



SPECIFICATION OF PATENT. 83 



COPY OF ORIGINAL SPECIFICATION OF PATENT, 1844, 

 AS LEGALLY PREPARED IN 1841. 



TO ALL PERSONS WHOM IT MAV CONCERN. 



Be IT KNOWN that I, the undersigned, Charles Goodyear, of 

 Boston, county of Suffolk, and commonwealth of Massachusetts, 

 have invented a new and useful improvement, called Goodyear's 

 Patent Fabrics, of which the following is a full and exact 

 description. 



These fabrics are made of a compound of gum-elastic, sulphur 

 and white lead, mixed with different kinds of fibre, such as 

 cotton, wool, flax, hemp, leather, and hair ; and also applied to 

 different kinds of cloth, cordage, leather, paper, &c. 



The compound is made as follows, viz. : — 



One pound of gum-elastic, 



One quarter to half a pound of sulphur, 



One half to one pound of white lead. 



The gum is dissolved, and the white lead and sulphur are 

 ground, in the usual method known to manufacturers, with 

 spirits of turpentine. 



When this compound is mixed with fibrous substances, I 

 think it quite necessary that the gum should be dissolved as 

 above, the different substances being thoroughly mixed with 

 each other. When the fibrous substance has sufficient length 

 of staple to be formed into a sheet or web, like cotton wadding, 

 I prefer applying the compound to it in the same way in which 

 it is applied to cloth or leather by callenders, instead of mixing 

 it with the compound, and when the compound is applied to 

 cloth or leather without the fibre, it is done with the various 

 kinds of machinery made use of by India rubber manufac- 

 turers. 



The compound without fibre may be mixed and ground 

 thoroughly together dry, and applied to cloth, leather, or a sheet 

 or web of fibre, with heated callenders, without the use of tur- 



