IMPROVEMENTS IN MACHINERY FOR THE MANUFACTURE OF SCREW BOLTS RIVETS SPIKES COACH SCREWS AND OTHER LIKE HEADED ARTICLES
Year: 1883

page_text: LETTERS PATENT to William Barwell of Birmingham in the County of
Warwick Manufacturer and Thomas Johnstone of Birmingham aforesaid
Machinist for an Invention of IMPROVEMENTS IN MACHINERY FOR THE
MANUFACTURE OF SCREW BOLTS RIVETS SPIKES COACH SCREWS AND OTHER
LIKE HEADED ARTICLES
PROVISIONAL SPECIFICATION left by the said William Barwell and
Thomas Johnstone at the Office of the Commissioners of Patents on the
10th January 1883.
WILLIAM BARWELL of Birmingham in the County of Warwick Manufacturer
and THOMAS JOHNSTONE of Birmingham aforesaid Machinist "IMPROVEMENTS
IN MACHINERY FOR THE MANUFACTURE OF SCREW BOLTS, RIVETS SPIKES, COACH
SCREWS AND OTHER LIKE HEADED ARTICLES
33
Our invention consists of the construction and arrangement hereinafter described
of the parts of machinery for heading heated blanks or rods of iron or steel for
the manufacture of screw bolts rivets spikes coach screws and other like headed
articles.
We will describe our invention as applied to the formation of heads upon
heated blanks or rods of iron for the manufacture of screw bolts.
Heading machinery constituting our invention consists essentially of the
following parts.
A vertical slide hereinafter called the main slide works in dovetail guides in
the fixed framing of the machinery and is raised and lowered by means of a double
cam on the horizontal shaft of the machinery the said cam working in an opening
in the head of the said slide. The bottom of the main slide carries the heading
die in which the head is fashioned In a hole in the middle of the main slide is a
sliding bar or plunger which extends from the heading die at the bottom to the
opening in the head of the slide in which the cam works. This sliding bar or
11

page_text: plunger is made in two parts which are capable of independent motion as herein-
after explained. The lower part of the sliding bar or plunger carries at its bottom
the heading tool which works in the heading die and forms the head on the heated
blank enclosed within the heading die. The upper part of the sliding bar bears
upon and gives motion to the lower part carrying the heading tool the said upper
part of the bar being operated by a cam on the shaft of the machine the last
named cam being situated between the double cam which works the main slide.
The lower part of the sliding bar may be separated from the heading tool by a
distance piece which arrangement affords facility for adjusting the heading tool.
The lower part of the sliding bar besides working the heading tool also acts as an
ejector for ejecting the headed bolt from the heading die. To fit the said lower
part of the sliding bar to act as an ejector its upper end has a short arm turned at
right angles which passes through a slot in the main slide and projects a short
distance beyond the face of the said slide. A set screw capable of adjustment is
carried by a cross bar on the fixed framing of the machine and is so situated with
respect to the short arm described that the latter on its ascending motion strikes
against the said set screw which acting as a stop arrests the further motion of the
lower part of the sliding bar as hereinafter described.
On the bed of the machine is a horizontal sliding saddle worked by a hand
lever. This sliding saddle supports a holder or socket in which the heated blank
or length of rod to be headed is placed.
The action of the machinery is as follows:-
A heated blank or length of rod having been placed in the holder or socket on
the sliding saddle the latter is moved under the main slide when it is at the top
of its stroke. On the said main slide making its descending stroke the heading
die at its botton passes onto and encloses the heated upper end of the blank or
rod. The heading tool carried by the middle sliding bar or plunger now descends
in the main slide by the action of the middle cam on the shaft of the machine
operating upon the projecting upper end of the said sliding bar or plunger. By
the descent of the said sliding bar or plunger the heading tool is made to compress
the heated end of the blank in the heading die and form a head upon the said
blank. The head having been thus formed the cain ceases to act upon the sliding
bar or plunger and the main slide makes its ascending stroke taking with it the
said bar or plunger and headed bolt. The rising of the main slide causes the short
projecting arm of the lower part of the sliding bar or plunger (which now acts as
an ejector) to strike against the set or stop screw herein before described. The
motion of the lower part of the sliding bar or plunger being thus arrested the
further ascending motion of the main slide causes the hended bolt to be ejected or
pushed from the heading die when the operations described are repeated.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Barwell and Thomas Johnstone in the Great Seal
Patent Office on the 29th June 1883.
WILLIAM BARWELL of Birmingham in the County of Warwick Manufacturer,
and THOMAS JOHNSTONE of Birmingham, aforesaid Machinist. "IMPROVEMENTS
IN MACHINERY FOR THE MANUFACTURE OF SCREW BOLTS, RIVETS, SPIKES, COACH
SCREWS AND OTHER LIKE HEADED ARTICLES
Our invention consists of the construction and arrangement herein after
described of the parts of machinery for heading heated blanks or rods of iron or
steel for the manufacture of screw bolts, rivets, spikes, coach screws and other like
headed articles.
We will describe our invention as applied to the formation of heads upon heated
blanks or rods of iron for the manufacture of screw bolts.
Heading machinery constituting our invention consists essentially of the following
parts.
•
A vertical slide herein after called the main slide works in dovetail guides in tho
fixed framing of the machinery and is raised and lowered by means of a double cam
on the horizontal shaft of the machinery, the said cam working in an opening in
the head of the said slide. The bottom of the main slide carries the heading die
in which the head is fashioned. In a hole in the middle of the main slide is a
sliding bar or plunger which extends from the heading die at the bottom to the
opening in the head of the slide in which the cam works. This sliding bar or
plunger is made in two parts which are capable of independent motion as herein
after explained. The lower part of the sliding bar or plunger carries at its bottom
the heading tool which works in the heading die and forms the head on the heated
blank enclosed within the heading die. The upper part of the sliding bar bears
upon and gives motion to the lower part carrying the heading tool, the said upper
part of the bar being operated by a cam on the shaft of the machine, the last
named cam being situated between the double cam which works the main slide.
The lower part of the sliding bar may be separated from the heading tool by a
distance piece, which arrangement affords facility for adjusting the heading tool.
The lower part of the sliding bar besides working the heading tool also acts as an
ejector for ejecting the headed bolt from the heading die. To fit the said lower
part of the sliding bar to act as an ejector its upper end has a short arm turned at
right angles which passes through a slot in the main slide and projects a short
distance beyond the face of the said slide. A set screw capable of adjustment is
carried by a cross bar on the fixed framing of the machine and is so situated with
respect to the short arm described that the latter on its ascending motion strikes
against the said set screw which acting as a stop arrests the further motion of the
lower part of the sliding bar as hereinafter described.
On the bed of the machine is a horizontal sliding saddle worked by a hand lever.
This sliding saddle supports a holder or socket in which the heated blank or length
of rod to be headed is placed.
The action of the machinery is as follows:-
-
A heated blank or length of rod having been placed in the holder or socket on
the sliding saddle the latter is moved under the main slide when the said slide is
ascending. On the said main slide making its descending stroke the heading die
at its bottom passes over and encloses the heated upper end of the blank or rod.
The heading tool carried by the middle sliding bar or plunger now descends in the
main slide by tho action of the middle cam on the shaft of the machine operating

page_text: upon the projecting upper end of the said sliding bar or plunger. By the descent
of the said sliding bar or plunger the heading tool is made to compress the heated
end of the blank in the heading die and forms a head upon the said blank. The
head having thus been formed the cam ceases to act upon the sliding bar or
plunger and the main slide makes its ascending stroko taking with it the said bar
or plunger and hended bolt. The rising of the main slide causes the short
projecting arm of the lower part of the sliding bar or plunger (which now acts as
an ejector) to strike against the set or stop screw herein before described. The
motion of the lower part of the sliding bar or plunger being thus arrested the
further ascending motion of the main slide causes the headed bolt to be
ejected or pushed from the heading die when the operations described are
repeated.
We will now describe with reference to the accompanying Drawing the manner
in which our invention is to be performed.
Figure 1 represents in front elevation and Figures 2 and 3 in vertical section,
bolt heading machinery constructed according to our invention; Figure 4
represents a front elevation, partly in section, of Figure 3 the sectional part being
taken through the middle cam and Figure 5 represents a vertical section of a
portion of the machine drawn to a larger scale; Figure 6 represents in plan a
portion of the main slide.
In Figures 1 and 2 the main slide is represented at the bottom of its stroke with
the inner sliding bar or plunger at the top of its stroke before the formation of a
head on the heated blank and in Figures 3, 4, and 5 the sliding bar or plunger is
represented at the bottom of its stroke and the head formed by its descent on the
end of the heated blank.
The same letters of reference indicate the same parts in the several Figures of
the Drawing.
a is the vertical main slide of the machinery working in dovetails in the fixed
cheeks b, b as usual. This main slide a is raised and lowered by the action of the
double cam c on the horizontal shaft e the said cam working in an opening in the
head a² of the slide a as represented: f is the heading die in which the head is
fashioned, the said heading die f being attached to the bottom of the main slide by
the two plates and screw bolts represented in Figure 1, one of the said fixing plates
being shown in plan in Figure 6.
Above and made separate from the heading tool is a sliding bar or plunger
made in two parts marked respectively i and the said bar or plunger working in
a hole in the middle of the main slide a. The upper end of the part k of the bar
or plunger projects in its raised position into the opening in the head a³ of the
main slide in which opening the cams work (see Figure 2). The lower part i of
the sliding plunger carries at its bottom the heading tool h and the upper part k
of the said sliding plunger bears upon and gives motion to the lower part i. The
upper part of the sliding plunger is acted upon by the cam d (the shape of which
is best seen in Figure 4) fixed on the shaft e the said cam d being situated between
the double cam c which works the main slide a; is a distance or packing piece
between the part of the sliding plunger and the heading tool h. By using
distance pieces of different thicknesses the adjustment of the heading tool h, when
worn, may be readily effected. On the top of the lower part of the sliding
plunger is a short horizontal arm m working in the slot n in the main slide a of
the machine; p is a set screw carried by the fixed cross bar q. The said set
screw.p is capable of adjustment in the fixed cross bar g. The short projecting
arm m in conjunction with the stop pin or set screw p constitutes an ejector; ris
the sliding saddle working on the bed of the machine and moved in the ordinary
way. This saddle carries the holder in which the heated blank or rod & rests
during the heading operation.
The heated blank or rod 8 having been advanced by the sliding saddle » under
the main slide a when the latter is ascending, the said main slide makes its
descending motion by the action of the cam c and the heading dief at its bottom

page_text: passes over and encloses the heated upper end of the blank or rod 8 as represented
in Figures 1 and 2. While the main slide a is at the bottom of its stroke in the
position represented, the sliding bar or plunger i, k is made to descend in the said
innin slide by the action of the middle cam d upon the projecting upper end of the
said bar or plunger. By this descent of the sliding bar or plunger i, k the heading
tool carried by the lower part i of the plunger is made to compress the heated
upper end of the blanke in the heading die fand form a head on the said blank
as represented in Figures 3 and 5.
Having made the head in the manner described the cam d by the rotation of the
shaft e is taken out of action so as to release the sliding bar or plunger i, k and the
main slide a makes its ascending motion by the action of the cam c, taking with
it the two parts of the bar or plunger i, and the beaded bolt & Figures 3 and 4.
As the main slide a rises the projecting arm or ejector m on the lower part i
of the sliding plunger strikes against the set or stop screw q. The motion of the
lower part of the plunger being thus arrested by the said arm and stop screw
the further ascending motion of the main slide causes the headed bolts to be
ejected or pushed from the heading die fas will be understood by an examination
of the sections Figures 2 and 3. After the ejection of the headed bolt the operations
described are repeated and another heated blank or rod headed.
Besides the manufacture of screw bolts, our invention may also be applied to the
formation of heads on heated blanks or rods for the manufacture of rivets, spikes,
coach screws and other like hended articles.
Having now described the nature of our invention and the manner in which the
same is to be performed we wish it to be understood that We claim as our
invention--The improvements in machinery for heading heated blanks or rods of
iron or steel for the manufacture of screw bolts, rivets, spikes, coach screws and
other like headed articles herein before described and illustrated in the accom-
panying Drawing; that is to say, the combination with the ordinary main slide
of the said machinery of the inner compound sliding bar or plunger i, k worked by
the cam & carrying the heading tool h, the two parts of the said compound bar or
plunger being made capable of separation for the adjustment of the heading tool
and the said bar or plunger being constructed and operating substantially as
described and illustrated; also the construction and combination of the parts
marked m and p constituting an ejector for ejecting the headed bolt or article from
the heading die.
In witness whereof I the said William Barwell have hereunto set my hand
and seal this twenty sixth day of June in the year of our Lord one thousand
thod and night then