CERTAIN IMPROVEMENTS IN BOLT SCREWING MACHINERY
Year: 1871

page_text: LETTERS PATENT to Benjamin William Rogers, of Smethwick, in
the County of Stafford, Machinist, for the Invention of "CERTAIN
IMPROVEMENTS IN BOLT SCREWING MACHINERY."
Sealed the 27th October 1871, and dated the 12th May 1871.
PROVISIONAL SPECIFICATION left by the said Benjamin William
Rogers at the Office of the Commissioners of Patents, with his
Petition, on the 12th May 1871.
I, BENJAMIN WILLIAM ROGERS, of Smethwick, in the County of
Stafford, Machinist, do hereby declare the nature of the said Invention
for "CERTAIN IMPROVEMENTS IN BOLT SCREWING MACHINERY," to be as
follows:-
The object of this Invention is that by the means herein-after
described all kinds of screw bolts can be screwed at a single cut by
self-feeding machinery. By this means much labour is saved and conse-
quently the work can be produced at a much lower rate that at present.
The bolts are delivered into a rail which may be done either from a
hopper or by hand, the bottom bolt is then taken by means of a pair
of feeding fingers from the rail and carried downwards towards the jaws

page_text: of the clamps. A plunger now strikes the shank end of the bolt and
propels the head of the said bolt into the jaws of the clamps, the said
jaws being open but closing upon receipt of the bolt. The clamps
work in a revolving spindle driven by a pulley or by any other con-
venient means. Immediately the head or neck of the bolt is seized by
the jaws of the clamps the fingers ascend, leaving the bolt revolving.
A pair of dics placed as herein-before mentioned are caused to close and
to approach the shank end of the bolt and gradually to travel along
the shank to the distance required, thus producing a full or complete
thread at a single cut. The dies then open and the saddle in
which they work retires to its normal position. Immediately upon the
opening of the dies the jaws of the clamps also open and the bolt is
ejected, the jaws remaining open for a sufficient period only to receive
another bolt. The jaws of the clamps, the feeding fingers, and the
plunger receive their respective motions by means of springs and levers,
and by cams upon the cam shaft. The cam shaft receives its motion
from the spindle of the clamps by means of change wheels and by
them reduced to the required speed:
I now proceed to describe my saddle and my regulator, which are the
chief points of my Invention, and for which I particularly desire to
secure protection.
First. The saddle proper is a frame of a suitable form supported and
sliding upon two bars parallel with cach other (the bars being fixed at
onc end in the clamps' spindle headstock, and at the other by brackets
bolted down to the frame of the machine). There is a boss on each
side of the saddle bored to suit the bars and to fit them easily, the body
of the saddle extending from one boss to the other. Astride the body
of the saddle are a pair of forked die holders or straddlers placed
opposite to each other, the legs of each die holder extending the proper
distance down each side the body of the saddle, and being hinged at
the extremities by means of taper pointed set pins, the said set pins
being screwed into lugs or ears of the saddle and being made fast by
lock nuts. The upper portions of the die holder are slotted out or
recessed on one side to receive the dies. The said dies are made fast
At the back
by set pins screwed into the die holders over each recess.
of cach die holder is caused to work a lever connected in the centre by
a bolt or pin passing through the body of the saddle and the eye of the
lever. A set pin passes through the upper end of each lever and comes

page_text: in contact with the back of the licad of each die holder for the purpose
of adjusting the dies. The bottom end of each lever consists of a joint
or jaw wherein works a roller sustained by a pin passing through the
centre of the jaw and roller. Between the rollers of the two levers
works a short shaft connected to the bottom of the saddle by means of
caps or glands, and upon this shaft is cast or keyed a cam with suitable
recesses on the rim to allow the admission of each roller as far as
required. At one end of the shaft is a lever the end of which rests
upon the bar of a cradle or rocking shaft working in bearings fixed to
the frame of the machine. Projecting from the cradle is another lever
with a roller placed in the end, the said roller being in contact with
a cam on the cam shaft. The desired motion is given therefrom, so
causing the cam on the short shaft to force the rollers of the levers
out of each recess, the upper end of the levers forcing the dio holder
inwards towards each other, thus closing the dies. By a contrary
motion the dies are caused to open.
My regulator consists of a short shaft or spindle which revolves in
the journal or bearing of the bracket bolted firmly to the frame of the
machine. A wheel is keyed on to one end of the spindle and geared
to and working from another wheel on the end of the cam shaft, the
spindle revolving at the same speed as the cam shaft. At the other end
of the spindle is a screw or incline of coarse pitch, but the pitch is not
entire, being broken before completion of one revolution so as to enable
a ram (which is forced by the incline against the saddle) to fall back to
the starting of the pitch.
The object of the regulator is to adjust and control the pitch of the
thread or screw required to be cut, which is effected by means of a ram
sliding in a socket fixed to the frame of the machine, one end of the-
ram touching the incline of the regulator, the other end touching the
end of the set screw fixed in the saddle with lock nuts, so that as the
spindle revolves the incline forces the ram and the ram forces the saddle
along to the distance required, the whole being brought back to the
starting of the pitch by suitable springs connected to the saddle and
the frame of the machinc.
The advantages of my saddle are that it is rigid whilst working (the
dies being locked in their position when closed), and so renders unneces-
sary any complication in other parts of the machine, and it takes but
little
power to control its operation.

page_text: The advantage of my regulator consists (among others) in its pre-
senting a broad surface or bearing on the face of the incline or pitch,
(against which works a roller placed in one end of the ram) and that it
will easily stand the pressure required to screw a full thread at one cut,
and also that with its broad working surface and slow motion it will
wear but very little.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Benjamin William Rogers in the Great Scal
Patent Office on the 9th November 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, BENJAMIN
WILLIAM ROGERS, of Smethwick, in the County of Stafford, Machinist,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twelfth day of May, in the year of our
Lord One thousand eight hundred and seventy-one, in the thirty-fourth
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Benjamin William Rogers, Her special licence
that I, the said Benjamin William Rogers, my executors, adminis-
trators, and assigns, or such others as I, the said Benjamin William
Rogers, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times there-
after during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Inven-
tion for "CERTAIN IMPROVEMENTS IN BOLT SCREWING MACHINERY," upon the
condition (amongst others) that I, the said Benjamin William Rogers,
my executors or administrators, by an instrument in writing under
my, or their, or
one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Benjamin William Rogers, do hereby
declare the nature of my said Invention, and in what manner the same

page_text: is to be performed, to be particularly described and ascertained in and
by the following statement (that is to say) :-
The object of this Invention is that by the machinery herein-after
described all kinds of screw bolts can be screwed at a single cut by self-
feeding machinery.
A general description of the nature of the Invention sought to be
secured having been given in my Provisional Specification I will
now proceed to describe the Drawings filed herewith which will fully
illustrate my method of carrying my said Invention into effect.
Fig. 1 (Sheet 1) is a longitudinal clevation of my improved machine;
Fig. 2 is a plan view.
Fig. 3 (Sheet 2) is a transverse elevation; Fig. 4 is a transverse
section of the saddle and apparatus for closing the dies; Fig. 5 is a plan
partly in section, shewing the principal part of my Invention.
a (shewn in Fig. 1 and 3) is the rail in which the bolts to be screwed
are placed; a 14 is a stand to support the rail a; a 1, al, in Fig. 1.
and 3 is a pair of fingers connected to the frame a 2, and closed by
the spring a 13, which passes partly round them and fits in a recess
in the frame a 2. The bolts are caused to slide down the rail a in
succession by means of the guard plate a 12. The bolts are supported
in the rail a by the retaining fingers a 10, a 10, (shewn in Fig. 1.)
The fingers a 1, a 1, are carried towards the clamps b, b, by the slide a 4,
and are connected thereto by the stud a 3 passing through the frame a 2
and the eye of the slide a 4. The slide a 4 is actuated by the lever a 7
working in the joint a 8, and operated upon by the cam a 9 on the cam
shaft (see Fig. 2). In Fig. 1 and 3 the end of the lever a 7 is shewn
resting upon the bolt a 5, which said bolt a 5. is for the purpose of
adjusting the slide a 4. The slide a 4 works in the bracket a 6 which
is bolted to the frame of the machine G. Suitable springs are attached
to the bracket a G and the slide a 4 to cause the fingers a 1, a 1,
and the slide a 4 to retire towards the rail a after performing their
functions.
I will now assume that the fingers a 1, a 1, have carried a bolt in
a line with the jaws of the clamps b, b. The cam 66, then imme-
diately actuates the lever 65, whereby the rod 63 forces the rod 64
along the distance required, the rod 64 passing through the spindle 61
and having a wedge fixed on the other extremity (but which except
the end thereof is not shewn in the Drawings as there is nothing novel
,

page_text: in the arrangement.) The rod 64 is then withdrawn a suitable
distance and the wedge is extracted from between the tails of the
clamps b, b, thus allowing the jaws of the clamps b, b, to open. The
plunger c (Figs. 1 and 2) now force the bolt into the clamps b, b, which
is done by the cam c4 (Fig. 2) giving the necessary motion to the
lever c3. c1 (Figs. 1 and 2) is a socket working in the bracket c 2
through which the plunger c passes. The socket c 5 (Fig. 1) is fixed
upon the plunger c at a convenient distance, and is connected to the
lever c3 by the spring shewn in Fig. 1, thus giving the plunger a
negative motion for the purpose of safety. The bolt having now arrived
between the clamps b, b, the jaws close, and the plunger c is caused to
retire by a convenient spring.
I will now proceed to give a more minute discription of those parts
of the machine which properly constitute my Invention.
.
d in Figs. 1, 2, 3, 4, and 5 is the frame of the saddle; d1, d1, are
the die holders closed and kept in their position by the levers d2, d 2.
The cam d9 (Figs. 2, 4, and 5,) by forcing the roller of the lever d6
upon its extreme periphery causes the other extremity of the lever d6
to lift the bar d5 (see Figs. 2 and 5) on which is caused to rest
the extremity of the lever d4, and it also causes the cam d3 (Fig. 4)
to perform a part of a revolution sufficient to allow the rollers in the
ends of the levers d 2, d 2, to fall into the recesses on the periphery of
the cam d3, and so permit the die holders d1, d1, to open. For
closing the dies the roller in the end of d6 falls into a recess of
the cam d9, leaving the lever d4 free to fall and turn the cam d3
partly round, and thereby to close the die holder d1. d6 consists
of two levers connected to a shaft oscillating in bearing d8, d8,
(Fig. 5); d4 (Fig. 4) is a lever in bearings d 10 underneath the
saddle. d.
:
In the die holder d1, d1, shewn in the Drawings, it will bo seen
that instead of having the legs of the die holders forked and placed
astride the saddle d I propose that each die holder d1, d1, should have
a straight leg connected, as shewn at dx, dx, between the plates
of the saddle d, by which the die holders are rendered simpler of
construction.
Having described the saddle and the method of closing and un-
elosing the dies I will now describe the regulator e (Figs. 2 and 5).

page_text: By means of the wheels E2 and E3 (the latter working on the
cam shaft f) the cam or regulator E is caused to revolve in the
bearing E1. The roller working in the end of the ram E4 is in
contact with the face of the said cam E, which by revolving forces
the ram E4 against the adjusting screw E 5, thus giving the desired
motion to the saddle d which slides upon the bars d11, d 11, the said
bars being supported at one end by supports d12, d12, and at the
other end in the frame, as shewn in Figs. 1 and 2 at G1. G in
Figs. 1, 2, 3, 4, and 5 is the frame of the machine; G1 and G2 in
Figs. 1, 2, and 3 are the bearings of the spindle 61; G3, G4, G5,
(Fig. 2,) are the bearings for the cam shaft f; 61 is the spindle, and
is driven by the pulley 62 (Figs. 1 and 2); H, H1, H2, and H3, (Figs. 1,
2, 3,) are change wheels, and are for the purpose of giving motion
to the cam shaft f from the spindle 6' and reducing the cam shaft f
to the required speed. The frame of the machine is supported by
legs J, as shewn in Fig. 3.
Having now described the nature of my Invention, and the manner
in which the same may be carried into effect, I desire it be understood
that I am aware that many parts of the machinery shewn in the
accompanying Drawings are not new, and for them therefore I do not
desire to make any claim; but what I do desire to claim as the
Invention to be protected by the herein-before in part recited Letters
Patent is,―
The arrangement herein-before shewn and illustrated in the accom-
panying Drawings for closing and unclosing the dies in the saddle b,
and which consists substantially of the parts d3, d 4, d 5, and d 6.
And I also claim the method herein explained of propelling the
saddle b by means of the regulator E, which gives the necessary motion
to make a full thread at a single cut.
In witness whereof, I, the said Benjamin William Rogers, have
hereunto set my hand and seal, this Eighth day of November, in
the year of our Lord One thousand eight hundred and seventy-
Ana
BENJAMIN WILLIAM ROGERS. (L.S.)