IMPROVEMENTS IN MACHINES FOR MANUFACTURING BOLTS, RIVETS, AND OTHER SIMILAR ARTICLES
Year: 1855

page_text: by the Act.)
PROVISIONAL SPECIFICATION left by Eugène Bourseret at the Office.
of the Commissioners of Patents, with his Petition; on the 13th March.
1855.
I, EUGÈNE BOURSERET, Mecanician, of Paris, Empire of France, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN MACHINES FOR
MANUFACTURING BOLTS, RIVETS, AND OTHER SIMILAR ARTICLES," to be as follows:-
My improvements in machines for manufacturing bolts, rivets, screw blanks,
treenails, and other similar articles, consists of a mechanical arrangement for
forging the articles, another for cutting a screw to those articles that require
this latter, and one for turning the heads. The machine for forging consists of
a ram or punching hammer, which by means of suitable gearing receives an
up and down motion from any suitable prime mover; under the striking part
or die of the hammer is situated a strong disc, which by means of proper gear-
ing is caused to turn horizontally on a vertical axis, and is provided with a
number of holes equidistant from the centre of the disc, the centre of each
hole being situated exactly beneath the centre of the punching die; each hole
is provided with a bolt holder, in which the article to be headed is inserted
while in a red hot state, after having been previously cut to a proper length
from a bar or rod by the rotating of the disc; each hole at its turn comes
beneath the punching hammer, at which time a momentary stop takes place,

page_text: 443
and the hammer falling down forms the head to the bolt, after which, the disc
continuing its rotation, another piece is brought under the hammer, and the
finished article is pushed out from the bolt holder by a proper arrangement.
In order to prevent the cutting apparatus, which is made of steel, becoming
softened, a continuous supply of cold water is caused to flow by a suitable
arrangement against the hinder side of the cutter. The mechanical arrange-
ment for cutting the screws to bolts is composed of a frame in which a number
of horizontal shafts are made to revolve simultaneously and with equal velo-
city, by means of any suitable prime mover and gearing; exactly opposite to
these shafts is situated a vertical frame carrying as many chair bearers as
there are revolving shafts; at the same time two clasps or hinges serve for
holding the bolts, two carriers serve for the screw nuts, and a number of these
nuts are made to advance simultaneously by means of a sort of rake. The
mode of working this machine may be altered in so far as to make the shafts
advance and leave the chair bearers in a fixed position. The arrangement for
turning the heads of bolts consists of a solid frame, in which four, arbors glide
and are made to revolve simultaneously by a suitable arrangement. To these
arbors are fixed in suitable cutter carriers cutting blades, under which are
placed the bolts, on the heads of which the blades are made to act, and by
means of suitable pressing screws, and gearing, the action of the blades on
the heads of the bolts is regulated at pleasure; whereas the whole derives its
motion by suitable gearing from any suitable prime mover.
T