IMPROVED APPARATUS FOR CUTTING SCREW THREADS ON OR IN METAL TUBES OR OTHER ARTICLES
Year: 1881

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine, Lake,
& Co., Patent. Agents, Southampton Buildings, Londou, for an Invention of
"IMPROVED APPARATUS FOR CUTTING SCREW THREADS ON OR IN METAL
TUBES OR
OTHER ARTICLES." A communication from abroad by Frank
Armstrong, of Bridgeport, Connecticut, United States of America.
PROVISIONAL SPECIFICATION left by the said William Robert Lake at
the Office of the Commissioners of Patents on the 15th July 1881.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "IMPROVED APPARATUS FOR CUTTING SCREW
THREADS ON OR IN METAL TUBES OR OTHER ARTICLES." [A communication
from abroad by Frank Armstrong, of Bridgeport, Connecticut, United States of
America.]
This Invention relates to apparatus for cutting screw threads upon or in articles
of various kinds, and consists in novel features of construction and arrangement, the
nature of which is hereinafter set forth.
One part of my Invention is designed for use in lathes and all screw-thread-
cutting machines, and comprises a mechanical arrangement whereby the carriage of
the inachine may be longitudinally adjusted when the machine is properly geared
and the work is in progress, and whereby after the tool has been temporarily
removed for any purpose it may be reset or replaced in its former position in the
unfinished thread and the work resumed. In cutting screw threads in machines as
heretofore constructed, when the tool becomes dulled and requires to be removed
and repaired there is great difficulty and loss of time in replacing the tool in the
proper position in relation to the unfinished thread, and more especially when working
on an inside thread.
In my improved device or mechanism the carriage of the lathe or machine can be
sufficiently adjusted to allow the tool to fit again into the unfinished thread from
which it was removed, this being effected with little labour and loss of time, and a
better result is obtained than heretofore with respect to the condition of the work,
...oll

page_text: as the tool will resume its cutting, and not endanger or destroy the symmetry of
the thread.
To explain the nature of this part of the said Invention I will describe the same
as attached to an ordinary lathe. The mechanism employed in operating and
controlling the carriage is attached to an apron. A leading screw engages (when
screw threads are being cut) with two nuts or half nuts, and a box is provided for
holding these nuts, keeping them in place, and preventing side play. A projection
or lug of this box extends through an elongated slot of the apron, and on the latter
there are stationary projecting lugs, which hold adjusting screws, the ends of which
engage with the projecting lug of the box, by which the carriage is longitudinally
adjusted as required. A tightening screw provided with a right and left hand
thread is provided to open and close the nuts. A bolt is attached to the box, and
projects through an elongated slot of the apron, holding the box firmly against the
apron by a nut.
Ribs project from the apron, holding the box in position, and preventing its
swinging or canting around when tightening the bolt.
The said box is constructed with a bottom, two sides, and a back, from which
projects the lug. A tool is provided in the sides, through which the leading screw
passes. The box is necessary to hold the nuts, for being in sections or halves they
would twist or cant and not rise or fall perpendicularly with the leading screw.
The device, as above described, is of the greatest importance in cutting inside
threads where it is very difficult to see the work, and still more difficult to adjust
the tool by the method heretofore in use.
Another object of my said Invention is to construct a screw threading apparatus
or device, consisting of die-blocks non-adjustable but interchangeable, steel dies or
· cutters, and a holder for the same, this device being adapted to cut screw threads
on pipes or rods of different diameters by interchanging the dies or cutters in the
blocks or holders, which are all of the same size and diameter, the same having
cutter recesses varying in distances from the centre according to the size or diameter
of the pipes or rods to be threaded. The die blocks or holders are provided with
recesses to receive loosely fitting steel dies or cutters, said dies being provided with
an enlarged base, and fitting a correspondingly enlarged recess in the die-block.
The recesses have a shoulder or seat at the bottom to locate the position of the dies
or cutters, and prevent them from dropping through when changing. Heretofore
die-blocks have been constructed provided with steel dies, but have been made with
a view to being adjusted to cut different sizes of pipes or rods, but if the adjust-
ments are not equal one or two dies of the set must necessarily do all or most
of the cutting. Dies thus constructed are expensive, and are not made to cut
screw threads on pipes or rods of different diameters by changing the dies or cutters
from one block or holder to another, but each block or holder is provided with its
own dies, and is complete in itself. Die-blocks have been constructed with steel
dies securely fitted and brazed into recesses of the die-block which requires a block
baving its own dies for every size of pipe or rod to be cut, and are in that respect
the same as solid dies, and quite as expensive as the latter.
My improved device is constructed with a view of receiving pipes or rods of
different diameters, the steel dies or cutters being all of the same length, and the
recesses in the different die-blocks to receive the dies vary in their positions from
the centre of the block, according to the different sizes of pipes or rods required to
be cut, so that in cutting pipes or rods of different diameters, the blocks being of
the same sizes on their outer diameter, but with varying inner diameter, all that is
necessary is simply to remove the dies from one block to another, thus requiring
only one set of dies to cut any size of pipe or rods within the range of the die-
blocks. Any number of die-blocks required can be used, for, being constructed as
described, they are inexpensive as compared with solid dies or blocks or holders
fitted with non-interchangeable cutters or dies.
In carrying this part of my Invention into practice I provide a die-block which
is furnished with recesses to receive the dies or cutters. The block is cast in the

page_text: required form, thus economising in manufacture. The said recesses are provided
with a scat near the bottom, on which the dies rest.
The dies when in the block and resting on the seat are secured in place by
screws, which hold them just sufficiently secure to prevent their dropping out. The
pressure in cutting is against the seat and against a projection or dio support of
the block. The dies have an enlarged base of circular form, making them easier to
fit, in addition to rendering the block stronger than it would be if the recesses
were made square or of any angular form. Another advantage of a die having a
circular base over one constructed with an angular base is that the screws enter
the block perpendicularly with the outside edge. Otherwise the screw would enter
at an angle with the edge of the die block in order to strike the side of the die
squarely, thus rendering the construction difficult and weakening the block.
The base of the dies is shorter than the top or cutting end, which allows the
cutting end to come flush with the faces of the die block.
In changing the dies from one block to another no adjusting is required, as the
recesses in all the die-blocks bear the same relative positions to their centres, and
vary only as regards the distance therefrom; it must necessarily follow that the
dies will cut with equal freedom in all the blocks.
My Invention further relates to that class of die-stocks which are operated by
hand for cutting screw threads on pipes or rods, and is more especially intended for
cutting threads on pipes. This part of my said Invention comprises a geared die-
stock operated and controlled by crank and pinion, whereby the cutter head is
made to revolve, and threads are cut on the pipe, making the operation much easier
than heretofore. Heretofore the cutter heads of die-stocks have been operated and
made to revolve by handles projecting from the cutter head, requiring the service
of two men to manipulate when cutting threads on large pipes; but with my
improved stock one man can easily perform the work formerly requiring two, and
when the thread is cut up far enough along the pipe the pinion is disengaged from
the geared cutter head, and can then be quickly run back by hand.
My Invention further comprises an attachment applied to a vice for holding the
pipe to the cut, to which vice the shaft having the pinion is attached.
carry this part of my Invention into practice as follows, that is to say :-I
provide teeth on the periphery of the cutter head, and a pinion engages therein;
this pinion is on a shaft, and there is a handle for operating the same; the shaft
rests in projections or ears. I provide a sliding gate, to which the ears are attached.
The vice for holding the pipes to be threaded is supported by a chair. A screw is
provided for tightening the pipe within the vice, and there is a screw for raising
and lowering the sliding gate, and a yoke is attached to the vice. Projections
having sockets are provided to receive handles as now used for operating die-
stocks.
Adjusting screws are provided for the dies, and there are projecting lugs for
holding the screws; also a screw for holding the aforesaid yoke firmly to the vice.
Jaws are provided for clamping and holding the pipe while the same is being
screw-threaded, and there is a lug or support for a screw which is used for raising
and lowering the gate. Holes are provided by which the chair holding the vice is
secured to the bench.
In cutting pipes of extreme diameters, either very large or very small, it will be
necessary to change the jaws in the vice, which will alter the position of the gear
wheel or teeth on the cutter head in regard to its relation with the pinion by
means of the screw. The gate to which the ears are attached is raised and
lowered as required until the gear wheel and pinion properly match. The yoke to
which the gate is attached is secured to the vice by means of a screw, and may be
thus fastened at any point required.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Robert Lake in the Great Seal Patent Office on the
14th January 1882.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London.. IMPROVED APPARATUS FOR CUTTING SCREW
THREADS ON OR IN METAL TUBES OR OTHER ARTICLES." A communication from
abroad by Frank Armstrong, of Bridgeport, Connecticut, United States of
America.
This Invention relates to improved apparatus for cutting screw-threads upon or
in metal tubes or other articles, and consists in various novel features of construction
and combinations of parts, as hereinafter described.
The object of the first part of the said Invention is to facilitate the cutting of
screw-threads and the setting and resetting of the thread-cutting tools after they
have been temporarily removed for grinding or repairing. This part of the said
Invention is designed for use in lathes and all screw-thread cutting machines, and
comprises a mechanical arrangement, hereinafter described, whereby the carriage of
the machine may be longitudinally adjusted when the machine is properly geared
and the work is in progress, and whereby, after the thread cutting tool has been
temporarily removed, it may be reset or replaced in its former position in the
unfinished thread and the work resumed.
In cutting screw-threads in machines as heretofore constructed, when the tool
becomes dull and requires to be removed and repaired, there is great difficulty and
loss of time in replacing the said tool in the proper position in relation to the
unfinished thread, and more especially when an inside thread is being cut.
In my improved apparatus or device the carriage of the lathe or machine can be
Bufficiently adjusted to allow the tool to again fit into the unfinished thread from'
which it was removed, this object being effected with but little labor and loss of
time, and a better result is obtained than. heretofore with respect to the condition
of the work, as the tool will resume its cutting and will not endanger or destroy
the symmetry of the thread.
This part of the said Invention is illustrated in Figures 1 to 7 of the accom-
panying Drawing, in which
Figure 1 is a side elevation representing the method of applying my improved
device or apparatus to an ordinary lathe, so much only of the lathe being shewn as
will enable the operation of my improvements to be readily understood.
Figure 2 is a similar view of a portion of the apron shewn in Figure 1, and
bereinafter described.
Figure 3 is an end elevation of a portion of the said apron and a box and other
parts adjacent thereto.
Figure 4 is an end view,
Figure 5 a side view, and
Figure 6 a plan or top view of the said box.
Figure 7 represents a screw in process of construction.
Some of these Figures are drawn to a larger scale than others.
A is the bed of the lathe, and B is the carriage. C is the apron, which is attached
to the said carriage and projects downward therefrom; this carriage has attached
to it mechanism which serves to operate it and control its position. D is the
leading screw which engages (when screw threads are being cut) with the two nuts
or half nuts b, b. F is a box which serves to hold the said nuts b, b, and retain them
in place and prevent side play. The projection or lug c of this box F extends through
the elongated slot d of the apron C, provided with the stationary projecting lugs e, e,

page_text: .through which pass the adjusting screws f. f. The ends g, g, of these screws engage
with the projecting lug c of the box F, so that the carriage B may be adjusted
longitudinally as required. G is a tightening screw provided with right and left
handed screw threads for moving the nuts b, b, from or into contact, with the
leading screw D. h is a bolt attached to or inserted in the box F, and projecting
through the elongated slot i in the apron C; by means of this bolt and the nut j
the box F may be firmly.held against the apron C.
k, k, Figure 3, are ribs projecting from the apron C so as to hold the box F in
position, and prevent it swinging or canting around when the bolt h and nut j are
being tightened.
In Figure 7 H represents the metal to be screw threaded. I is a tool properly
set and adjusted, so that the angle of the tool is in the proper relation with respect
to the angle of the thread. J represents a tool in the position (with reference to
the thread) in which it is liable to be found after it has been replaced in the
machine, but not adjusted.
The operation of the said apparatus is as follows, that is to say
:- -When the
work required to be performed is in progress, and before it is completed and the
required size of the thread. obtained, an accident is liable to happen to the tool, such
as the breaking or wearing away of the point, thereby preventing the production
of perfect work, and it therefore, becomes necessary to remove the tool and repair
it; and on replacing and setting the said tool by the thread-gauge, so that the angle
of the tool corresponds with the angle of the thread, it will be found that it does
not match or coincide with the thread, but will assume a position with regard to
the same similar to that, for instance, shewn at J in Figure 7. The only remedy
known and practiced by workmen is either to drive the point of the tool around
until it is in a line with the bottom of the thread, or to disconnect the driving
gear-wheels and turn the leading screw, thus moving the carriage longitudinally
until the tool is in the proper position. These methods of adjustment however
entail a great loss of time and tedious and tiresome operations; the first method is
detrimental to good work, as a perfect thread cannot be formed when the tool has
been replaced, and occupies the position shewn at J in Figure 7. With my improve-
ments however all that is necessary is to turn the adjusting screws f, f; by the
adjustment of these screws the carriage whereon the tool is mounted may be moved
to the right or left as required until the said tool is in its proper position, as
indicated at I in Figure 7.
The adjustment of the carriage is only necessary when the lathe or machine is
arranged to cut screw threads, and the nuts b, b, are brought in contact with the
leading screw D by the tightening screw Q, which has right and left handed screw
threads, as above stated, that engage with corresponding right and left handed
screw-threads in the nuts b, b. The box F and the nuts b, b, placed therein remain
stationary while the carriage is being moved or adjusted. The said carriage is
moved as follows, that is to say:-One of the screws fis turned so that its point g
is moved out of contact with the lug c of the box F; pressure is then brought to
bear against the opposite side of the said lug c by the end g of the other screw ƒ,
so that the carriage will be moved, say, to the left. By reversing the operation
the said carriage may be moved to the right. The bolt h and nut j which hold
the box F up to the apron C are loosened to such an extent as to allow the carriage
to move and are then tightened up. The said box F is constructed with the
bottom n, the two sides o, o, and the back p from which projects the lug c; a
hole is provided in the sides o, o, through which the leading screw D passes.
The box F is employed to hold the sections or halves of the nuts b, b, in position,
as they would otherwise twist or cant and not rise and fall perpendicularly with
respect to the leading screw. The apparatus above described is of the greatest
importance in cutting inside threads, where it is very difficult to see the work
and still more difficult to adjust the tool by the methods heretofore practised.
Another part of the said Invention has for its object to construct a screw-
threading apparatus or device, consisting of die blocks, which are non adjustable

page_text: but interchangeable, steel dies or cutters, and a holder for the same, this apparatus
being adapted to cut screw threads on pipes or rods of different diameters by inter-
changing the dies or cutters in blocks or holders which are of the same size and
diameter; these blocks or holders have cutter recesses, varying in distance from
the centre according to the size or diameter of the pipes or rods to be screw threaded.
These die-blocks or holders are provided with recesses to receive loosely fitting
steel dies or cutters, the said dies being provided with an enlarged base and fitting
a correspondingly enlarged recess in the die-block. The recesses have a shoulder
or seat at the bottom to determine the position of the dies or cutters, and prevent
them from dropping through when being changed. Heretofore die-blocks have
been constructed having steel dies, but have been made with a view to adjustment
to cut different sizes of pipes or rods; but if the adjustments are not equal one
or two dies of the set must necessarily do all or most of the cutting. Dies thus
constructed are expensive and do not permit screw threads to be cut on pipes or
rods of different diameters by changing the dies or cutters from one block or
holder to another, but each block or holder is provided with its own dies and is
complete in itself. Die-blocks have been constructed with steel dies securely fitted
and brazed in recesses in the die-block. In this case a block having its own dies
is required for every size of pipe or rod to be cut, and the said block in that
respect is the same as solid dies and quite as expensive as the latter.
My improved apparatus is constructed with a view to receive pipes or rods of
different diameters, the steel dies or cutters being all of the same length, and the
recesses in the different die-blocks to receive the dies vary in their relative
positions with regard to the centre of the block according to the different sizes of
the pipes or rods required to be cut, so that in cutting pipes, or rods of different
diameters, the blocks being of the same size on their outer diameter, or of the
same contour but with varying inner diameter, all that is necessary is simply to
remove the dies from one block to another, thus requiring only one set of dies to
cut any size of pipe or rods within the range of the die-blocks; any desired number
of die-blocks can be used, as by reason of their construction they are inexpensive
as compared with solid dies, or blocks or holders fitted with non interchangeable
cutters or dies.
This part of the said Invention is illustrated in Figures 8 to 18 of the Drawing,
in which
Figure 8 is a face view of one of my improved die-blocks, and
Figure 9 is an end view of the same.
Figure 10 is a face view of the said block with the dies or cutters fitted therein.
Figures 11 and 12 represent one of the said cutters detached.
Figure 13 represents a portion of a die block and shews the cutter securing screw
entering the same at an angle, as hereinafter described.
Figures 14 to 18 represent a series of die blocks which are of the same dimensions
exteriorly but have recesses to receive the dies or cutters at different distances
from the centre of the block, so as to cut pipes, bolts, or the like of different
diameters.
Referring to these Figures, A represents the die block provided with the recesses a
to receive the dies or cutters B. This block A is preferably cast in the desired
form, so as to economise the manufacture of the same, and the recesses a are
provided with a die-seat c near the bottom on which the dies rest.
The dies, when inserted in the block and when resting upon the seat c, are
secured in position by screws d, which hold them just sufficiently secure to prevent
their dropping out. The pressure in cutting is against the seat c and against the
projection or die support of the block A. The dies B have an enlarged base b of
circular form, which facilitates their fitting in position and renders the block A
stronger than it would be if the recess were made square or angular in form.
Another advantage of a die having a circular base over one constructed with an
angular base is that the screw d enters the block perpendicularly to the outside
edge, otherwise the screw would enter at an angle to the edge of the die block in

page_text: order to strike the side of the die squarely, thus rendering the construction difficult
and weakening the block (see Figure 13).
In Figures 14 to 18 are shewn a set or series of die-blocks, which are of the
same size exteriorly and are adapted for use with the same holder, but whose
cutters, when placed in position, will cut screw threads upon tubes, bolts, or the
like of different diameters. Figure 14, for instance, represents a block whose
recesses are adapted to determine the position of the dies or cutters in such a
manner that they will cut an inch pipe or bolt. Figure 15 represents a dic, whose
recesses are adapted to receive dies or cutters in such position that they will cut a
pipe or bolt one inch and a half in diameter, and so on, the distance of the
recesses a from the centre of the blocks varying according to the sizes of the pipe
or the like required to be cut. The dies B inserted in the block A, as shewn in
Figure 14, can be transferred to the blocks shewn in Figures 15, 16, 17, and 18,
and will cut pipes of varying diameters requiring the same pitch of thread with
one set of dies or cutters. The pitch required will be marked on the dies, and the
dies can readily be sharpened by grinding their faces f. The base of the die B
is shorter than the top or cutting end, so as to allow the cutting end to come flush
with the faces of the die-block, the step g of the said die resting on the seat c of
the block A. In changing the dies from one block to another no adjustment is
required, as the recesses in all the die blocks bear the same relative positions to the
centre of the same and vary only as regards the distance therefrom; it must
necessarily follow that the dies will cut with equal freedom in all of the
blocks.
Another part of this Invention relates to that class of die-stocks which are
operated by hand for cutting screw-threads on pipes or rods, and is more especially
intended for cutting threads on pipes. This part of the said Invention comprises a
geared die-stock operated and controlled by a crank and pinion, whereby the
cutter-head is made to revolve and the threads are cut on the pipe, thereby
rendering the operation much easier than heretofore. Heretofore the cutter-heads
of die-stocks have been operated and made to revolve by handles projecting from
the cutter-head and requiring the service of two men to manipulate when cutting
threads on large pipes, but with my improved stock one man can easily perform
the work formerly performed by two, and when the thread is cut far enough along
the pipe the pinion may be disengaged from the geared cutter-head and can then
be quickly run back by hand. This part of the said Invention further comprises
an attachment applied to a vice for holding the pipe to be cut, to which vice the
shaft having the pinion is attached.
This part of the said Invention is illustrated in Figures 19 to 21 of the Drawing,
in which
Figure 19 is a side elevation of my improved die-stock, and
Figure 20 is a front elevation of the same.
Figure 21 is a perspective view of the vice, and represents the manner of
attaching a yoke to the same, as hereinafter described.
Referring to these Figures, A is the portion of the stock which slips over the
pipe; a represents one of a series of thimbles used for different sizes of pipes;
b is a thumb-screw for securing the same; B represents the toothed periphery of
the cutter-head; C is a pinion which engages therewith and is carried by the
shaft D; E is the handle or crank for operating the same; F, F, are projections or
ears having bearings for the said shaft D; c is a sliding gate, to which the ears F, F;
are attached; H is the vice for holding the pipes; I is the chair, which supports
the said vice H; J represents the pipe secured in the said vice, and d is a screw
for tightening the said pipe within the same; e is the screw for raising and
lowering the gate c; f is a yoke attached to the vice H; g, g, are projections having
sockets to receive the handles ordinarily used for operating die-stocks; K is the
cutter-head having the toothed periphery B; h, k, are the cutting dies; i, i, are
adjusting screws for the dies h, h; j,j, are projecting lugs through which the said
screws pass; is a screw for holding the yoke ffirmly to the vice-H.; 1, 1, are the

page_text: jaws for clamping and holding the pipe while being screw-threaded; m is a lug or
support for the screw e for raising and lowering the gate c; n, n, are holes by which
the chair I holding the vice H is secured to the bench.
The cutter-head K with the dies h, h, and the means for adjusting the same, the
stock A having the sockets g for the handles, and the vice H with its jaws 1, 1, are
similar to those ordinarily employed for cutting or screw threading pipes. When
cutting small pipes it requires comparatively little labor with the aid of the handles
to form the thread, but when it is desired to cut pipes of large diameter the service
of from two to four men is necessitated, thus rendering the operation difficult and
tiresome. By means of the toothed periphery B and the pinion C however, one
man can easily cut or screw thread the largest pipes.
In practice the pipe J is placed within the jaws 1, 1, of the vice H and held
firmly therein by the tightening screw d, the stock A with the cutter head K is
slipped on the pipe and the shaft D inserted in its bearings in the ears F, F; the
pinion and the toothed periphery B of the cutter head are then brought into gear
and by means of the handle E the said cutter-head is caused to revolve. When
the pipe is threaded to the desired extent, instead of reversing the cutter-head or
turning it backwards by means of the handle E, the shaft D is taken from its
bearings in the ears F, F, and with the handle and pinion attached thereto is laid
aside for future use. The cutter head is then turned or whirled back quickly by
hand and removed from the pipe.
r
h
In cutting pipes of extreine diameters, that is to say, pipes which are either
very large or very small, it will be necessary to change the jaws in the vice H
which will alter the relative position of the teeth on the periphery of the tter-
head with regard to the pinion C; by means of the screw e, the gate c, to.
the cars F are attached, is raised and lowered as required until the said
periphery of the cutter head K. and the pinion are properly brought into gear. 1
yoke to which the gate c is attached is secured to the vice H by means of the
screw k as above stated, and may be secured at any desired point by means of the
said screw.
Having thus fully described the said Invention, as communicated to me by my
foreign correspondent, and the manner of performing the same, I wish it understood
that I claim,-
First. In a lathe or machine for cutting screw-threads, means for effecting the
longitudinal adjustment of the carriage whereon the cutting tool is mounted while
the leading screw and nut are connected, substantially as above set forth and for
the purpose specified.*
Second. The combination with the nuts b, b, of the box F, substantially as above
set forth and for the purpose specified.
Third. The combination of the box having the sides o, o, the bottom n, the
back p and the projecting lug with the apron having the elongated slot d, the
projecting lugs and the screws f, f, substantially as above set forth and for the
purposes specified.
Fourth. The combination of the box F, the bolt h, and the nut j, with the apron
having the elongated slot i, substantially as above set forth and for the purpose
specified.
Fifth. A screw threading or cutting die block having recesses adapted to receive
interchangeable but non-adjustable dies, and provided with seats to support the
said dies, substantially as above set forth.
Sixth. A series of die blocks arranged as described to operate in sets, all of the
blocks having the same outer diameter or contour, and the series of blocks
being provided with recesses to hold the dies, which recesses vary in distance from
the centre of the block in proportion to the different sizes of material required to
be cut in. combination with one set of interchangeable steel dies or cutters,
substantially as above set forth.
Seventh. The combination of the cast block A having the recesses a and the
seat c, the support e and the screw & with the die B having the enlarged base b

page_text: and the step or offset g, all substantially as above set forth and for the purposes
specified.
Eighth. In a band die-stock the cutter-head having the toothed periphery,
substantially as and for the purpose above set forth.
Ninth. The combination with the cutter-head having the toothed periphery, the
pinion C, the shaft D, and the handle E of the stock A, substantially as and for
the purpose above described.
Tenth. In combination with the vice, the yoke having the screw k, the sliding
gate c, the ears to support the shaft D and the adjusting screw e, for raising or
lowering the said shaft and effecting the proper adjustment of the pinion C,
substantially as above set forth and for the purpose specified.
In witness whereof, I, the said William Robert Lake, have hereunto set my
hand and seal, this Fourteenth day of January, in the year of our Lord
One thousand eight hundred and eighty two.
W. ROBT. LAKE. (L.S.)