AN IMPROVED MACHINE FOR MAKING EYELETS
Year: 1868

page_text: PROVISIONAL SPECIFICATION left by Bristow Hunt at the Office of
the Commissioners of Patents, with his Petition, on the 10th August
1868. A communication from abroad by James M. Osgood, of
Somerville, in the County of Middlesex, and State of Massachusetts,
in the United States of America.
I, BRISTOW HUNT, of No. 1, Serle Street, Lincoln's Inn, in the
County of Middlesex, Gentleman, do hereby declare the nature of the
said Invention for "AN IMPROVED MACHINE FOR MAKING EYELETS," (a
communication to me from abroad by James M. Osgood, of Somerville,
in the County of Middlesex, and State of Massachusetts, in the United
States of America,) to be as follows:-
The object of this Invention is to produce eyelets of cast metal or com-
position, and to finish them by machinery without any intermediate
manipulation, by which they can be manufactured very cheaply and with
great rapidity.
The Invention consists in the employment of a series of annular recesses
formed on the surface of a rotating cylinder, in which recesses are fitted
sliding tubes that surround fixed cylindrical pins, thus forming circular
spaces for the reception of molten metal properly conducted to the same.

page_text: A reciprocating longitudinal motion is given to the said sliding tubes by
means of cross bars to which they are attached, the ends of the said
cross bars fitting in cam grooves formed on the inner sides of the cylinder
heads.
In connection with the above is a second cylinder of suitable size
studded on its surface with projections, buttons, or headers which corre-
spond with the recesses in the first-named cylinder, and as the cylinders
revolve are made to come in contact with the projecting ends of the
partly formed eyelet and finish the heads or projecting edges of the same.
The operation is as follows:-The metal or composition being melted
in a suitable vessel will pass through a tube into a chamber covering a
portion of the surface of first-named cylinder, the latter being duly
rotated; at this point the tubes are withdrawn into the cylinder to the
required depth of the eyelet to be formed. By the action of the cross
rods in the cam groove the tubes commence to withdraw as the recesses
enter the chamber at one side, so that in their passage through the space
formed by the chamber the tubes will be suddenly retracted, and so
create a vacuum into which the melted metal is at once forced. As the
cylinder continues its rotation the recesses pass by the edges of a plate
which smooths off the outer ends of the metal eyelets in the same. The
partially formed eyelets retaining their position in the recesses are carried
around in the cylinder, becoming cooled in the meantime until they
approach the projections on the second named cylinder, when the cam
groove commences to force the tubes out gradually, which causes the now
cooled metal to project sufficiently from the recesses to form the head
of the eyelet. After passing this point the cam so formed as to throw
out the tubes to their fullest extent, and thus eject the completed eyelet
from the cylinder. The tube will remain in this position until it again
enters the chamber.
The cylinder may be made of any size required and contain as many
recesses as can properly accommodate the number of pins and sliding
tubes to be operated.