One hundred and twenty-eighth, to James Reynolds, of New York City. For Machine for making gutta-percha pipes and covering telegraph wires.
This invention is for the purpose of forming, tubing, or coating wires—both operations being substantially alike—by forcing the gutta-percha, while rendered plastic by heat, through a die. The necessary pressure for this purpose is applied by a piston working in a cylinder, in which the material is placed and kept heated, or by other suitable forcing apparatus.
One improvement consists in connecting the cylinder with an air pump, or other suitable exhausting apparatus, whereby any air remaining in the said cylinder after it has been filled as full as possible with gutta-percha and closed, may be extracted before applying the pressure. The manufactured article is thus rendered free from blow holes, and is perfectly firm. This is a result of great importance for small tubing and the covering of fine wire.
A second improvement consists in arranging the die and core by which the tube is produced or the covering of the wire performed, in a position transverse to the direction in which the piston works to produce the pressure, to allow a hollow core to be used for the admission of air into the tube as fast as it is formed, and also to prevent it from collapsing by the formation of a vacuum within. The same arrangement also permits the passage of the wire through the die when it is being covered by the percha.
A third improvement consists in providing the stomach in which the die is placed, with an opening, to allow of the constant escape of a certain quantity of material during the operation. By this means the quality of the manufactured article is rendered more uniform. Without such an arrangement it is almost impossible to produce small tubing or cover fine wire with any degree of uniformity of thickness.
A fourth improvement consists in the employment of a continuously revolving trough of water, suitably arranged to receive the tube or covered wire as fast as it leaves the die, and coil it up in the water to cool it, to prevent the coils from sticking together.
One hundred and twenty-ninth, to Thomas C. Wales, of Dorchester, Mass., February 2, 1858. For Water-proof Gaiter Shoes and Boots.
I do not claim the vulcanizing process, nor do I claim making articles of cloth cemented together with rubber cement and afterwards vulcanizing them, nor do I claim making shoes partly of leather and partly of cloth, the same being made by connecting the leather and cloth together by water proof caoutchouc cement, as such when made partly of leather cannot be vulcanized, owing to the fact that the great heat required in the vulcanizing process, injures or destroys the leather.
I claim a new or improved manufacture, or water-proof vulcanized rubber and cloth gaiter shoe, made in manner and with its external layer of cloth, and its lining of cloth arranged together, and with respect to the remainder or rubber parts or foxing, substantially as specified.
One hundred and thirtieth, to Edwin M. Chaffee, of Providence, R. I., February 26, 1858. For India-rubber Door Mat.