IMPROVEMENTS IN MACHINERY FOR ROLLING SCREWS AND METAL RODS
Year: 1872

page_text: PROVISIONAL SPECIFICATION left by Reinhold Boeklen at the Office
of the Commissioners of Patents, with his Petition, on the 23rd
September 1872.
I, REINHOLD BOEKLEN, of the City of Brooklyn, in the County of
Kings, and State of New York, in the United States of America, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
MACHINERY FOR ROLLING SCREWS AND METAL RODS," to be as follows:
.
The first part of this Invention relates to the combination of a
concentric rotary or vibratory guide for the blank, with a pair of dies or
working faces, one working face or die passing the other which is
stationary, or the working faces or dies may pass each other in opposite
directions. Between these working faces or dies the rolling process is
performed to produce the desired form to the periphery of the blank in
such a manner that the said guide at a certain time during its motion
receives and holds a blank which is dropped from a hopper, and after-
wards places the same between the commencing ends of the working
surfaces or dies, and holds and conducts the same in proper relative
position whilst being rolled by the dies and after the guide (and the
object under operation) has passed the dies or working faces, the guide
allows or causes the object to drop or be discharged from the machine..
The object of this part of the Invention is to pass and guide the blank
positively and automatically from the hopper of the machine until it has

page_text: been operated upon and discharged from the machine with the desired
configuration on its periphery.
The second part of the Invention relates to the combination of the
guide before referred to, and a stop and spring with the working faces
of a stationary and a rotary or vibratory die, in which the commencing
end of the said rotary or vibratory die passes the commencing end of
the stationary die in a contrary direction, and in such a manner that
said guide spring and stop shall cause the blank to pass in properly
between the commencing ends of said dies irrespective and independent
of the diameter of the blank and the consequent increase or decrease of
the rate or speed of the passage of the same between the dies, and
conduct it properly between the said dies whilst being rolled, and
afterwards allow it to fall or be discharged from the machine. The
guide then returns to its normal position in order to meet the next
blank passing from the hopper of the machine, and so on continuously.
The object of this part of the Invention is to ensure that the guide
shall always return to its normal position whilst passing the hopper to
receive a blank, and conduct it to the commencing ends of the dies, so
that the blank shall meet and pass properly between the commencing
ends of the dies, and to allow the guide to yield and accomodate its
motion according to the diameter of the blank and its rapidity of
revolution whilst passing between the dies.
The third part of the Invention relates to the combination of the
rotary and stationary dies, guide, stop and spring, with the hopper and
gate which is operated by a rocking lever acting with a stud fixed on
the rotary guide die or other moving part of the machine, in such a
manner that said gate shall open and discharge a blank each time of the
guide passing said gate. By these means the guide is fed automatically
at each revolution.
The fourth part of the Invention relates to the formation of working
surfaces on the said dies having equal opposite portions parallel to each
other, between which the shank of the screw is rolled whilst other equal
opposite portions form an increasing angle towards each other and are
arranged excentrically to form and roll the point of the blank, so that
all of the various portions of the blank have screw threads formed upon
their face. The object of this part of the Invention is to form screw
threads on taper rods for the purpose of manufacturing gimblet pointed
screws, the points of gimblets, and other taper screws.

page_text: The fifth part of this Invention relates to the combination of a
sectional rotating or vibrating die with a sectional stationary adjustable
die, in such a manner that said stationary die shall be capable of being
adjusted excentrically, vertically, or longitudinally, and from and
towards the rotary die.
The
In carrying out my Invention, when the machine is constructed with
dies, one of which is stationary and the other moving, and operating
against the inner periphery of the other, I construct a strong framing
which has a central bearing, in which the shaft of the moving die
revolves or vibrates, and opposite the periphery of the moving die the
stationary die is arranged which has an inner periphery for its working
face, capable of operating with the working face or outer periphery of
the moving die to admit of the blank being rolled between them.
top, bottom, and sides of the stationary die are made right angular,
except at the working face, and the die is retained in position by a
flango carried by the framing. This flange is provided with set screws
to adjust and hold the stationary die in its proper relative position to the
moving die. The rear side of the stationary die rests against set screws
carried by the face or front of the framing. The front side of the die is
covered with a plate which is bolted and secured to the front edge of
the flange carried by the framing; set screws are arranged in the plates
secured to the front edge of the flange, by means of which and other set
screws arranged in the framing the position of the stationary die may
be adjusted, and when adjusted may be clamped and held firmly in
position. The front end of the main shaft is supported in bearings
carried by a standard or bracket bolted to the main framing. A hopper
is arranged at the upper part of the machine provided with a falso
bottom or gate through which blanks are fed to a guide. This guide for
the blanks is by preference formed in two parts, one of which is fitted
against the front side, and the other against the rear side of the moving
die. Both parts are made with central bosses or hubs, fitted to revolve
loose upon the main shaft, and each has two arms, one extending
upwards, the other downwards. A cross piece connects the downward
projecting arms. The upward extending arms are formed with
corresponding notches, or have plates secured to them, each provided
with a corresponding notch capable of admitting the blank, and
retaining it in a position parallel to the axes of and across the working
face of the die, so that it may allow it freely to turn therein. The

page_text: moving die is mounted and secured upon a strong collar permanently
secured upon the main shaft. The die circumscribes only a portion of
the periphery of the collar, which is of smaller diameter than the die,
and is formed with flanges or wings to which the die is bolted. The
cross piece connecting the downward projecting arms has a set screw or
screws arranged to come in contact with the flange or wing to which
the finishing end of the moving die is affixed. Around the main shaft a
spiral spring is placed which has one end secured to the main shaft or to
a collar secured on the same, the other end of the spring presses against a
stud on the guide, thereby causing the guide to stop against the said
flange or wing to which the finishing end of the die is secured, and in
consequence bringing the notches for receiving the blank opposite the
commencing end of said die and holding the blank upon the same.
The guide is held in this position as soon as it arrives under the gate of
the hopper, and whilst passing to the commencing end of the stationary
die, but as soon as the blank has been received between the commencing
ends of the dies and begins to roll between the dies, the speed of the
guide decreases from that of the revolving die more or less according to
the diameter of the blank. The spring yielding to the retarding action
of the blank allows the guide to accomodate itself to the speed of the
blank until it has passed the finishing ends of the dies. The position of
the guide and its notches at this time is downwards so as to allow the
blank to be discharged from it, and by means of the spring the guide is
quickly brought home to its normal position against the flange or wing
of the finishing end of the die, so that before arriving under the gate of
the hopper the notches for receiving the blank are again placed
opposite the commencing end of the die ready to receive a new blank
from the hopper. In order to insure that the guide shall stop positively
against its flange or wing whilst passing the gate to receive a blank, and
afterwards placing it between the commencing ends of the dies, I
employ a spring pawl on the front part of the guide which drops in a
notch in the die as soon as it stops against the flange or wing. This
pawl is withdrawn from the die to unlock the guide by means of an
adjustable stud secured to the front standard or bracket, and adjusted to
come in contact with the rear arm of the pawl at the time that the
blank comes between the commencing ends of the dies.

page_text: This rocking shaft receives motion by means of an arm connected to a
rod, one end of which is connected to a loose arm projecting down and .
coming in contact with a stud either secured to the moving die or the
rear part of the guide in order that at the time the said guide is under
the gate of the hopper it may open the gate and receive a blank from
the hopper.
To make more certain that the blank shall drop at the proper time
into the notches of the guide when operating the machine rapidly, and
when blanks of limited weight are used, I employ one or more spring
fingers to touch or press upon the blank to be fed carried by a rocking
shaft having an arm affixed thereon to come in contact at the proper
time with a stud on the loose arm, and thereby cause the spring finger
or fingers to press the blank down at the proper time to meet the
notches in the guide. According to the nature of the thread or surface
to be produced on the blank operated upon the guide may have cross
pieces partly or wholly reaching across the die to secure the proper
guiding of blanks of different lengths.
To retain the blank in its proper position longitudinally I employ an
adjustable stop piece on the cross pieces, and an adjustable stop and
horizontal rod projecting from and secured to the front part of the guide.
When the machine is used for threading bolts the dies have parallel
working surfaces which are provided with screw threads to produce the
screw thread required. In order to obtain a gradual increasing pressure
upon the blank either or both of the working surfaces are placed
5 somewhat nearer together towards the finishing ends of the dies.
When it is required to make taper or gimblet pointed screws a portion
of the working surfaces of the dies are formed with increasing taper
towards each other until the taper and desired point of the screw is
obtained. The tapered, as well as the parallel portions of the faces of
the dies are threaded alike so that when making gimblet pointed screws
the shanks are threaded between the parallel portions of the said dies,
whereas the point of the screw or gimblet is threaded in the raised
tapered portions of the dies. In some cases the inner die may be
stationary and the outer die may revolve.
When employing a movable and a stationary die the movable die
may be arranged to vibrate instead of revolve, in this case the guide may
be either arranged to revolve or vibrate with the moving dic. Both dies

page_text: may in some cases be arranged to revolve or vibrate. In this arrange-
ment the guide should remain stationary during the rolling process, and
have a periodical movement to conduct the blank from the hopper to
the point of feed between the dies, and the guide should be locked
during the rolling process. For this purpose a pawl having an arm is
arranged to come in contact with a stud on the die, and the guide is
provided with a notch into which the said pawl drops as soon as it is
brought into position for rolling the blank. By means of the stud the
said pawl is withdrawn, and the guide is caused to turn to the hopper
by means of a spring, and after receiving a blank the guide is again
turned to bring another blank into position for rolling, and so on
continuously. Instead of vibrating a single guide a series of guides at
equal distances apart may be caused to revolve at intervals by means of
a pawl and ratchet wheel, so that whilst one guide is under the hopper
to receive a blank another guide is feeding a blank to the dies, and at
the same time a third guide is discharging a screw from the machine.
When the guide is used with dies having vertical bases or faces
instead of with perispherical dies, a periodical movement is imparted to
it, so that it may remain in an upward position while receiving and
rolling the blank, and it is brought into a downward position for
discharging the blank by means of a cam, crank, or lever, and it is
caused to return to its upward position by means of a spiral spring.
Gimblet pointed screws produced by rolling as herein described have
a hardened point and shank, in consequence of which they can be
driven into hard wood without bending the shanks or points with
facility, and they are produced at a far less expense than the ordinary
cut screw.
When the machine is employed for rolling rods, shafts, or spindles,
instead of the threading screws, the working surfaces of the dies are formed
with corresponding raised, depressed, or even portions to produce a rod,
shaft, or spindle of the shape desired, so that a blank may be fully
shaped as desired by introducing the same between said working surfaces
by means of the above described guide.