Year: 1896

page_text: Date of Application, 25th Aug., 1896-Accepted, 20th Mar., 1897
Rhode Island, United States of America, Mechanic, do hereby declare the nature
of this invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :-
The object of my invention is to produce hexagonal nut blanks from a flat rolled
bar of narrower width than the distance between the opposite corners of the blank
without waste of stock, and it consists in a series of crowned hexagonal nut blanks
formed in a continuous bar having serrated edges which conform to the opposite
edges of the nut blanks, and having the blanks punched from one side to a thin
web upon the opposite crownel side of the blank. It also consists in the improved
construction and arrangement of the parts of the machine, whereby the nut blank
is punched and crowned by menus of a reciprocating punch, after the edges of the
bar have been first pressed into serrated form by means of rolls whose axes of
rotation are parallel with, and in the same plaue, with the axis of the punch, as
hereinafter fully set forth.
In the accompanying drawing:
Fig. 1, represents a front elevation of the machine.
Fig. 2, represents a side elevation of the same.
Fig. 3, represents a top view of the die bed, showing the recessed rolls.
Fig. 4, represents an under view of one of the ratchet levers, by means of which
the rolls are operated.
Fig. 5, represents an enlarged top view of the nut blanks in the bar.
Fig. 0, represents a section of the bar takon in the line 6, 6, of Fig. 5.
Fig. 7, represents an enlarged side view of the punch and the punch socket.
Fig. 8, represents a section of the same taken in the line 8, 8, of Fig. 7.
Fig. 9, represents an enlarged top view of the die.
Fig. 10, represents section taken in the line 10, 10, of Fig. 9.
In the drawings, A. represents the frame of the machine, B the crank shaft,
(the crank, D the sliding-head, and E the link which connects the sliding hend
with the crank. Upon the die-bed F, which is a forward projection of the frame A
is arranged the die G, the said die being provided with the recesses a, a', adapted
to receive the crowned side b, of the nut-blank e, in the bar K. Upon the upper
ends of the upright shafts 1, I, which extend through the die-bed F, are securod
the recessed rolls J, J, which serve to serrate the opposite edges of the bar K, to
form the opposite corners d, d, of the nut-blanke, the said shafts being mado
adjustable toward each other, by means of the set-screws L, L. At the lower ends
of the shafts I, I, are secured the gear wheels M, M, the teeth of which engage
with each other, the said gears and their shafts I, I, being operated for rotation,
by means of the ratchet pawls N, N, which are pivoted to the ratchet-levers O, O,
and actuated toward the said gears, by means of the springs P, P. The ratchet
evers O, are pivoted to the lower ends of the shafts I, I, and are actuated to
impart the required intermittent rotary movement to the rolls J, J, by means of
he levers Q, Q, which are pivoted to the sides of the frame A, by means of the
bolts R, R, and actuated by means of the cams S, S, upon the shaft B. The
apper ends of the levers Q, Q, are provided with the anti-friation rollers T, which
are held in contact with the periphery of the cams S, 8, by means of springs U.

page_text: The removable punch V, is provided with the rounded eud i, and the punch-
socket V, is provided with a transverse perforation as shown in the section Fig. 8,
and to the opposite sides of the punch socket are attached the flexible pipes f
through which water is mado to pass to cool the punch and its socket, and small
grooves, g, are formed in the shank of the punch to allow the liquid to escape
from the cavity of the socket to the outer side of the punch for cooling or lubricating
purposes. The punch-socket V, is provided at its reer with the swaging face W
which serves to swage the nut after it has been first punched and crowned.
The operation of the machine is as follows: The red hot bar of stock Y, of the
proper thickness, and of a width somewhat less than the distance between the
opposite corners d, d, of the nut, is passed into the space between the recessed
peripheries of the rolls J, J, and when the opposite corners d, d, have been
imperfectly impressed upon the bar, and the punch V is brought down over the
solid die G, the rounded end i, of the punch will cause the spreading of the metal
so as to fill out the corners d, d, to the required degree of sharpness and will leave
a thin unpunched web of metal at the crowned side of the bar. And as the
machine continues in operation, the operation of the ratchet-pawls N, N, will serve
to rotate the gears M, M, for the space of one tooth, thus bringing the bar Y,
forward, to form another nut blank, the shafts I, I, being made capable of a slight
up and down movement, in their bearings to allow the crowned lower surface of the
bar, to pass out of the first recess a, into the corresponding recess a' of the die G.
And upon the succeeding downward movement of the punch, the nut-blank then
held between the rolls J, J, will be punched and spread, as before, and the previously
formed nut-blank, will be swaged, by the engagement of the swaging face W, with
the upper surface of the blank. As the machine continues in operation, the bar of
nut-blauks K, will be fed forward through the opening X, to the rear of the
machine. The rolls J, J, and the gears M, M, may be readily changed for making
nuts of different sizes or thicknesses, the said rolls and gears being removed from
the shafts I, I, and others substituted therefor. And in that case, the stroke of
the ratchet pawls N, N, may be correspondingly varied, by moving the pivot,
bolts R, R, so as to change the throw of the lower ends of the levers Q, Q.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what
I claim is:
1. A. series of crowned hexagonal nut blanks formed in a continuous bar, the
serrated edges of which conform to the opposite edges of the nut blanks, and having
the blanks punched to a thin web upon the crowned side of the blank, substantially
as described.
2. In a machine for making nut blanks the combination of the intermittently
operated recessed rolls adapted to impart a serrated form to the opposite edges of
the bar and the solid crowning die located in the plane of the axes of the recessed
rolls, with the reciprocating punch having its axis located in the said plano, and
adapted to punch the bar to a thin web at the crowned side, substantially as
described.
3. In a machine for making nut blanks the combination of the intermittently
operated recessed rolls adapted to impart a serrated form to the opposite edges of
the bar, with the reciprocating punch, having its axis located in the plane of tho
axes of the recessed rolls, and a swaging face arranged to operate upon the bar
behind the punch, substantially as described.
Dated this 28th day of Tula AD 1800
SAMUEL VANSTONE.
Haseltine, Lake & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant,