IMPROVEMENTS IN THE MANUFACTURE OF BARRELS FOR FIRE-ARMS AND A communication OTHER LIKE ARTICLES, AND IN MACHINERY THEREFOR."
Year: 1877

page_text: "
LETTERS PATENT to William Robert Lake, of the Firin of Haseltine, Lake,
& Co., Patent Agents, Southampton Buildings, London, for the Invention of
IMPROVEMENTS IN THE MANUFACTURE OF BARRELS FOR FIRE-ARMS AND
A communication
OTHER LIKE ARTICLES, AND IN MACHINERY THEREFOR."
from abroad by William Schley, of the City of New York, and Henry Clay
Bull, of Brooklyn, both in the State of New York, United States of America.
Sealed the 15th September 1877, and dated the 3rd July 1877.
PROVISIONAL SPECIFICATION left by the said William Robert Lake at the.
Office of the Commissioners of Patents on the 3rd July 1877.
::
MACHINERY
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN THE MANUFACTURE OF
BARRELS FOR FIRE-ARMS AND OTHER LIKE ARTICLES, AND IN
THEREFOR." [A communication from abroad by William Schley, of the City of
New York, and Henry Clay Bull, of Brooklyn, both in the State of New York,
United States of America.]
The said Invention comprises a process of broaching, planing, finishing, or rifling
barrels for fire-arms and other like articles by means of cutters or cutting instru-
ments mounted on a bar, rod, or holder, which is subjected to a severe longitudinal
tensile strain, whereby the vibration or shifting of the cutters or instruments.is
precluded, and the accuracy and uniformity of the work performed by them
enhanced.
The said Invention also comprises a process of broaching, planing, finishing, or
rifling barrels for fire-arms and the like by means of stationary cutters or cutting
instruments, and presenting the barrels thereto by means of a travelling carriage,
whereby also the uniformity and accuracy is increased.
Also broaching, planing, and finishing barrels for fire-arms and the like by a
series of independent cuts, extending side by side spirally through the barrels from
end to end; and broaching, planing, or finishing, and rifling barrels for fire-arms,
without removing them from or adjusting them in the devices employed to hold
them, whereby the bore and rifling are ensured, being concentric.

page_text: The said Invention also comprises a process of broaching, planing, or finishing,
and rifling barrels for fire-arms, and subsequently chambering them, without
removing them from or adjusting them in the devices employed to hold them,
whereby the bore, rifling, and chain bering are rendered concentric and in perfect
harmony each with the others. .
The said Invention also comprises the combination of a stationary strained bar,
rod, or holder for cutters or cutting instruments, and a travelling carriage for pre-
senting to such cutters or instruments the articles to be operated upon.
Also the combination with a bar, rod, or holder for cutters or cutting instruments,
of mechanism for subjecting the same to a severe longitudinal tensile strain.
Also the combination with a bar, rod, or holder for cutters or cutting instruments,
and mechanism for straining the same, of an apparatus connected with said
mechanism, so that it will indicate the strain exerted on the said bar, rod, or
holder.
Also the combination with a longitudinally-strained bar, rod, or holder for cutters,
of a wedge impinging against the backs of the cutters, and a screw and nut con-
nected with such wedge, to provide for shifting the wedge to adjust the cutters
without affecting the strain on their bar, rod, or holder.
The said Invention also comprises the combination of stationary cutters and a
carrier for the barrel adapted to move the latter to and past the cutters.
Also the combination of stationary cutters and a barrel carrier adapted to move
a barrel to and past the cutters, and to twist or rotate the barrel at the same time;
so that the cutters will operate upon it in spiral lines.
The said Invention also comprises the combination in a machine for broaching,
planing, or finishing, and rifling barrels for fire-arms, of stationary cutters, a carrier
adapted to move a barrel longitudinally and rotate it axially past the cutters, and
mechanism controlling the engagement of the carrier with its driving mechanism,
whereby the machine may be adapted for both broaching, planing, or finishing, and
rifling, at pleasure.
It also comprises the combination with a rotary barrel-carrying spindle and its
driving mechanism of a clutch piece, consisting of a pivoted arm provided with a
tooth and carried by the said driving mechanism, and a series of holes or recesses in
a wheel connected with the spindle, whereby the latter may be connected with its
driving. mechanism in such manner as to present any part of the barrel carried by.
it to the cutters for operating thereon. Also the combination with this clutch piece
of a stop for operating the said clutch piece on its coming in contact therewith in
its backward movement, and for slipping out of the way of the said clutch piece as
the latter moves forward, so as not to interfere with it. Also the combination with
the said clutch piece referred to of an excentrically-supported shaft therefor,
whereby provision is afforded for adjusting it so as to connect the spindle carrying
the barrel with its driving mechanism for broaching, planing, or finishing, or for
rifling.
The said Invention also comprises the combination of the barrel-carrying spindle
of brakes, consisting of springs and plungers acting on the journal boxes, whereby
the spindle will be stopped iminediately on being released from its driving
mechanism.
Also the combination with a rotary barrel-carrying spindle of a chuck; wherein,
after the strained bar, rod, or holder for the cutters has been removed, may be
inserted a tool for chambering the barrel before its removal from the spindle:

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 2nd
January 1878.
WILLIAM ROBERT LAKE, of the Firm of. Haseltine, Lake, and Co., Patent
Agents, Southampton Buildings, London. "IMPROVEMENTS IN THE MANUFACTURE
OF BARRELS FOR FIRE-ARMS AND OTHER LIKE ARTICLES, AND IN MACHINERY
THEREFOR." A communication from abroad by William Schley, of the City of
New York, and Henry Clay Bull, of Brooklyn, both in the State of New York,
United States of America.
The said Invention comprises a process of broaching, planing, finishing, or rifling
barrels for fire-arms and other like articles by means of cutters or cutting instru-
ments mounted on a bar, rod, or holder, which is subjected to a severe longitudinal
tensile strain, whereby the vibration or shifting of the cutters or instruments is
precluded, and the accuracy and uniformity of the work performed by them
enhanced.
:
The said Invention also comprises a process of broaching, planing, finishing, or
rifling barrels for fire-arms and the like by means of stationary cutters or cutting
instruments, and presenting the barrels thereto by means of a travelling carriage,
whereby also the uniformity and accuracy is increased.
Also broaching, planing, and finishing barrels for fire-arms and the like by a
series of independent cuts, extending side by side spirally through the barrels from
end to end; and broaching, planing, or finishing, and rifling barrels for fire-arms,
without removing them from or adjusting them in the devices employed to hold them,
whereby I ensure the bore and rifling being concentric.
The said Invention also comprises a process of broaching, planing, or finishing,
and rifling barrels for fire-arms, and subsequently chambering them without
removing them froin or adjusting them in the devices employed to hold them,
whereby the bore, rifling, and chambering are rendered concentric and in perfect
harmony each with the others.
The said Invention also comprises the combination of a stationary strained bar,
rod, or holder for cutters or cutting instruments, and a travelling carriage for pre-
senting to such cutters or instruments the articles to be operated upon.
Also the combination with a bar, iod, or holder for cutters or cutting instruments,
of mechanism for subjecting the same to a severe longitudinal tensile strain.
Also the combination with a bar, rod, or holder for cutters or cutting instruments,
and mechanism for straining the same, of an apparatus connected with said
mechanism, so that it will indicate the strain exerted on the said bar, rod, or
holder.
Also the combination with a longitudinally-strained bar, rod, or holder for cutters,
of a wedge impinging against the backs of the cutters, and a screw and nut con-
nected with such wedge, to provide for shifting the wedge to adjust the cutters
without affecting the strain on their bar, rod; or holder.
The said Invention also comprises the combination of stationary cutters and a
carrier for the barrel, adapted to move the latter to and past the cutters.
Also the combination of stationary cutters and a barrel carrier adapted to move
a barrel to and past the cutters, and to twist or rotate the barrel at the same time,
so that the cutters will operate upon it in spiral lines.
The said Invention also comprises the combination in a machine for broaching,
planing, or finishing, and rifling barrels for fire-arms, of stationary cutters, a carrier
adapted to move a barrel longitudinally and rotate it axially past the cutters, and
mechanism controlling the engagement of the carrier with its driving mechanism,
whereby the machine may be adapted for both broaching, planing, or finishing, and
rifling, at pleasure.
It also comprises the combination with a rotary barrel-carrying spindle and its
driving mechanism of a clutch piece, consisting of a pivotted arm provided with a

page_text: tooth, and carried by the said driving mechanism, and a series of holes or recesses in
a wheel connected with the spindle, whereby the latter may be connected with its
driving mechanism in such manner as to present any part of the barrel carried by
it to the cutters for operating thereon. Also the combination with this clutch pièce.
of a stop for operating the said clutch piece on its coming in contact therewith in
its backward movement, and for slipping out of the way of the said clutch piece as
the latter moves forward, so as not to interfere with it. Also the combination with
the said clutch piece referred to of an excentrically-supported shaft therefor,
whereby provision is afforded for adjusting it so as to connect the spindle carrying
the barrel with its driving mechanism for broaching, planing, or finishing, or for
rifling.
The said Invention also comprises the combination with the barrel-carrying
spindle of brakes, consisting of springs and plungers acting on the journal boxes,
whereby the spindle will be stopped immediately on being released from its driving
mechanism.
Also the combination with a rotary barrel-carrying spindle of a chuck, wherein,
after the strained bar, rod, or holder for the cutters has been removed, may be
inserted a tool for chambering the barrel before its removal from the spindle.
In the accompanying Drawing,
Figure 1 is a side elevation of a machine embodying the said improvements, the
strained bar, rod, or holder before mentioned being omitted.
Figure 2 is a plan thereof, the said strained bar, rod, or holder being omitted.
Figure 3 is a side elevation partly in longitudinal section of the said machine.
Figure 4 is a transverse section of the said machine taken as indicated by the
dotted line x, x, Figure 3.
Figure 5 is an elevation of the end portion of the side of the machine opposite
to the side shown in Figure 1.
Figure 6 is a view drawn to an enlarged scale of the strained bar, rod, or holder
and its appurtenances.
And, Figures 7 and 8 are views, also enlarged, illustrative of the aforesaid excen-
trically-supported shaft and clutch piece for locking the barrel-holding spindle to
the mechanism for imparting motion to it.
Similar letters designate corresponding parts throughout the Drawing.
This machine is especially adapted for broaching, planing, finishing, rifling, and
chambering barrels for fire-arins. Before describing it in detail I will premise that
the various improvements which have been described, or some of them, may be
embodied in machines for one or more of the kinds of work just enumerated, or in
machines for performing similar work on different articles.
A designates the frame or bed of the machine; this frame may be of cast iron and
of any suitable form. The strained bar, rod, or holder is supported in pillow blocks
B, B¹, erected on the frame or bed A. C designates, see Figures 3 and 6, the bar,
rod, or holder proper, provided at one end with a diametrically larger boss C¹,
tapering preferably toward the inner end for engagement with a chuck D in the
pillow block B, and provided at the opposite end with a diametrically larger boss C²
for engagement with a chuck D¹ arranged in the pillow block B¹, and capable of
being adjusted lengthwise, together with a sleeve E, receiving it and fitting in the
pillow block last mentioned, for the purpose of subjecting the said bar C to a
severe tensile strain longitudinally. Cs designates the holder for the cutters or
instruments C, mounted on the strained bar C. This holder may consist simply in
a mortise or slot, of such size as to receive the cutters or instruments and properly
support them. The cutters or instruments are shown as of ordinary form, and as
consisting of two sets, each composed of three cutting faces, capable of adjustment
so as to project more or less, as may be necessary, to accomplish the desired work.
Preferably their faces are transversely of segmental form, so that cuts made by them
in a fire-arm barrel will, when the barrel is broached, planed, or finished, and rifled,
be as nearly concentric with each other as possible. Any suitable devices for
effecting the adjustment of the cutters may be employed. The devices illustrated

page_text: consist of a conical wedge C5, arranged longitudinally within the bar proper C, and
impinging against the inner sides or backs of the cutters. To this wedge is attached
a rod Co, connected with a screw C7; fitting within the chuck D projecting beyond
the same, and provided with a hand nut Cs bearing against the end of the said
chuck, see Figure 3. By adjusting this nut in one direction the wedge C³ may be
made to force out the cutters C to any desirable extent, and by adjusting it in the
reverse direction the wedge C will be adjusted so that the cutters may move
inward under pressure caused by contact with the work.
It is desirable now to proceed with a description of the barrel carrier, wherein
the barrel to be operated upon is presented to the cutters mounted on the strained
bar without at present considering the mechanism for exerting the strain on the
said bar. F designates a travelling carriage, supported on guides or ways a on the
frame or bed A, see particularly Figure +, and provided on the bottom with a
nut F', represented as extending its entire length and as of semi-cylindrical form. A
screw shaft G engaging with the nut F', and having a rotary motion alternately in
reverse directions, moves the carriage F forward and backward. H designates a
rotary hollow spindle, by which the fire-arm barrel to be operated upon is carried.
It is concentric with the strained bar C, and is provided preferably at the ends
with chucks I, of suitable construction to hold and properly centre the barrel. It
is shown as supported in pillow blocks J, J, erected on the carriage F, and while
moving along with the carriage receives a rotary movement on its axis. The strain
on the bar C precludes the cutters from vibrating or shifting out of their proper
position, wherefore the work performed by them is rendered very accurate and
uniform throughout its extent. Although for some work it may be found desirable
to make the strained bar and the cutters mounted thereon movable, and so keep the
article to be operated on stationary, yet for working on fire-arm barrels it is pre-
ferred to use these parts, as previously described, because of the supposed greater
accuracy and uniformity which may be thus attained. The combined longitudinal
and rotary movements of the barrel-carrying spindle cause the barrel to be so
presented to the cutters that they will cut it in coincident spiral lines, extending
side by side from end to end of the broached, planied, or finished barrel. By broaching,
planing, or finishing barrels in this way the work can be done with increased
accuracy, and can be made perfectly uniform throughout its extent, and the barrels
are caused to exert any resistance which they offer to missiles discharged from them
in spiral lines, and therefore contribute to the twisting or spinning of the missiles.
Accuracy and uniformity in work to be performed on fire-arm barrels is of the
utmost importance, because on the possession of these qualities depends the effective-
ness of the fire-arms in which the barrels may be used.
A description of the mechanism for straining the bar C for imparting motion to
the screw shaft G, actuating the carriage F, and rotating the barrel-carrying
spindle H, and for fulfilling other functions herein-before adverted to, may now be
given with advantage.
Beginning with the mechanism for straining the bar C for the cutters :-K
designates a frame, extending outward from the pillow block B', forming one of the
supports of the said bar C, and L, L, L, L³, designate a connection between the
outer part of the frame K and the sleeve E containing the chuck D', wherein is
secured the end of the bar C, on which the strain is exerted. L designates a yoke,
which forms part of this connection, and is employed to accommodate a lever №
attached to the shank of the chuck D' to provide for conveniently operating this
chuck, as will be herein-after described. L¹ designates a rod connected with said
yoke, and L2 a screw fitting in the frame K, and engaging with a nut in the rod L,
so that by properly turning it the sleeve E with the chuck D¹ may be drawn out-
ward, and the cutter bar, rod, or holder properly strained. The device here
represented for connecting the yoke L and rod L' consists of an hydraulic weighing
apparatus L³, and serves to indicate the strain to which the cutter bar, rod, or
holder is subjected. Instead of this any strain or weight-indicating apparatus of

page_text: suitable construction, connected with the mechanism for straining the bar, rod, or
holder, so as to indicate the strain exerted by it, may be used.
The clutch D¹ consists of a number of shouldered fingers adapted to extend over
and grasp. the boss C2, see Figure 6, of the har C. These fingers taper towards
their free ends, and may, by the lever M, be shifted into a large cylindrical portion-b
of the sleeve E, wherein they can be spread apart or into a portion c tapering like
'their exterior, and serving to bind them tight upon the said boss C². To secure and
strain the bar, rod, or holder C it is passed through and is fitted into the chuck D,
and its boss C is inserted between the fingers of the chuck D₁ while they are in
the large cylindrical portion b of the sleeve E. Afterwards the sleeve. E and
chuck D' are so adjusted relatively to each other as to cause the taper portion c of
the former to bind the fingers of the latter to the boss C of the cutter bar C. Then
the sleeve E is drawn outward, the strain being exerted on the said bar and
indicated by the apparatus L³.
Turning now to the mechanism for imparting motion to the screw shaft G for
actuating the carriage F, N, N¹, see Figure 1, designate two pulleys arranged
loosely on the shaft G outside the frame or bed A, and to be driven by belts in
reverse directions. O designates a double male clutch piece locked by a feather or
otherwise so as to turn or rotate with the said shaft, but so as to be capable of
being shifted along the same to engage with the female friction clutch piece of one
or the other of the pulleys N, N', so as to derive rotary motion therefrom in one
direction or the other, and transmit it to the shaft G. P designates, a shipper rod
carrying a toe d entering an annular groove in the male clutch piece O, and
providing for conveniently engaging the said clutch piece with either pulley N or
'N¹, and rotating the screw shaft G in the desired direction. A lever P¹ pivotted to
the frame or bed A. is connected to the shipper rod P in such manner that it will
serve to hold the clutch piece in contact with either pulley N, N¹, while deriving
inotion from it.
.Considering now the mechanism for rotating the barrel-carrying spindle, Q
designates, see particularly Figure 2, an inclined bar pivotted at one end to the
frame or bed A, and capable of being adjusted to different angles, and locked by
clamping it to a slotted arc-shaped support Q1 Q2 designates a saddle mounted on
this inclined bar, and connected with a toothed rack supported so as to be
capable of a longitudinal motion on a bracket extending from the carriage F. The
toothed rack engages with a pinion R which is locked to the barrel-carrying
spindle H, and as the saddle Qmoving with the carriage F travels along the
inclined bar Q; the said rack is moved across the said carriage, and, acting on the
pinion R, rotates the spindle H with uniform speed. It will be obvious that the
rapidity of this rotation and pitch of the cut produced by the cutters Care
dependent on the angle of the inclined bar Q, on which the rack-driving saddle Q²
travels, and that consequently the rotation and pitch may be graduated at pleasure
by shifting the inclined bar.
$ designates plungers extending through the caps of the pillow blocks J, J, and
bearing against the tops of the journal boxes of the barrel-carrying spindle H.
Upon these plungers bear springs Sexerting a pressure which is transmitted
through the tops of said journal boxes to the spindle, wherefore the former are
caused to act as a brake on the latter, and stop it when it is released from its
driving mechanism. Preferably these plungers S are hollow, and serve as
lubricators.
The mechanism for locking the barrel-carrying spindle H to the pinion R, from
which it derives motion, will now be described. The pinion is supported on a
stationary sleeve R' surrounding the barrel spindle H, and carries a hollow arm R²,
wherein is a pawl-like clutch or dog R³ consisting of a rod provided with a tooth e,
see Figures 7 and 8, extending transversely from it and supported on a shaft R*,
which, for a purpose hereafter to be explained, is supported in excentric bearings.
This dog or clutch is actuated by a spring f; and its tooth e engages with one or

page_text: another of a series of holes or recesses g in.a wheel T, which may be a large gear
wheel, and is mounted on and rigidly secured to the barrel-carrying spindle H.
The arm of the dog or clutch R³ extends beyond the pinion R, and after each transit
of the barrel-carrying spindle H forward and backward, and completion of a cut, is
disengaged from the wheel T of the said spindle, so that its tooth may engage with
the next hole or recess in the wheel T, and present the barrel for a fresh cut at the
side of the forner. The stop referred to, see Figure 2, consists of an arm U
supported in a sheath U₁ fastened to the pillow block B¹ of the strained cutter bar,
rod, or holder. The arm U is pivotted within the sheath U¹ and held in a horizontal
position by a spring U%. The arm of the dog or clutch R³ comes in contact with
the end of the arm U, and is held back long enough for its tooth to be released from
the hole or recess of the wheel T with which it was engaged, and arrive opposite
the next hole or recess; the spindle having been stopped by the brakes or springs
and plungers S¹, S. The tooth of the clutch R is brought opposite the said next.
hole or recess by the turning of the pinion R by which it is carried, and when the
tooth arrives opposite this hole or recess the arm of the clutch slips off the arm U
of the said stop so that the tooth may enter the hole or recess. The continued
movement of the barrel-carrying spindle follows. In returning, should the arm of
the dog or clutch R³ come in contact with the arm U of the stop, the said arm will
yield in its sheath against the pressure of the spring. Us, and will not therefore
interfere with or disarrange said clutch piece. A new part of the barrel is presented
in each forward movement of the barrel-carrying spindle to the cutters or cutting
instruments of the strained bar, rod, or holder, and thus a series of coincident cuts
are produced until the broaching, planing, or finishing is completed.
To effect the rifling of the barrel the cutters C+ are properly set, the dog or clutch
piece R³ is disengaged from the wheel T, and its excentrically supported shaft R',
see Figures 7 and 8, is adjusted by means of a handle R5, so that the tooth e is
drawn opposite to a series of holes or recesses. i, shown as six in number, in the
wheel T, with which it may engage, and from one to another of which it is shifted
by the stop U in manner similar to that described in connection with the holes,f,
but the holes i being farther apart effect the shifting of the barrel so that it is
presented to the cutters C+ at isolated parts only, and has rifle grooves formed
in it.
The object of constructing the wheel T of the barrel-carrying spindle with gearing
teeth is to adapt it for use in chambering barrels. After the broaching, planing, or
finishing is completed, the 'strained bar, rod, or holder is removed, a chambering tool
inserted in the chuck D¹, the clog or clutch piece R³ is disengaged from the wheel
T, and a shaft V driven by a belt on a pulley V₁is shifted and locked by a set
screw entering an annular groove, so that a pinion V2 will engage with the said
wheel T, rotate the spindle H, and present the barrel to the chambering tool before
mentioned. The feed for chambering may be effected by shifting the said spindle
or the sleeve E. By chambering the barrels before removing them from the supports
wherein they were broached, planed, or finished, and by a tool in a chuck that con-
tributed to support the cutters used in the previous operations, the bore rifling and
chambering.are made concentric and in perfect harmony with one another, much to
the improvement of the barrels.
The operation of the machine is as follows:-The barrel to be operated upon.is
secured in the spindle H, the cutter bar, rod, or holder C inserted and strained, and
the cutters Cset. The barrel being then carried over and past the cutters, and simul-
taneously rotated, is cut spirally from end to end. It returns in the same cut, is
shifted so as to present a new surface to the cutters, and again moves forward and
returns, continuing thus until every part of the barrel has been subjected to the
cutters, and the barrel is properly broached, planed, or finished. Subsequently the
cutters are again adjusted, the driving mechanism is through the adjustment of
the dog or clutch R³ differently combined with the barrel-carrying spindle, and the
latter is presented to the cutters C, and the barrel is rifled. Afterwards the
strained cutter bar, rod, or holder is removed, a chambering tool inserted instead of

page_text: it, and the shaft V thrown into gear with the spindle H, and the barrel is chambered
and ready for removal.
Having thus fully described the said Invention as communicated to me by my
foreign correspondents, and the manner of performing the same, I wish it under-
stood that I claim in the manufacture of barrels for fire-arms and other like
articles,―
First. The processes of broaching, planing, finishing, or rifling by means of cutters
or cutting instruments mounted on a bar, rod, or holder subjected longitudinally to
a severe tensile strain; also finishing or rifling by stationary cutters or cutting
instruments, and presenting the barrels to them by means of a travelling carriage;
also broaching, planing, or finishing by a series of longitudinal cuts extending side
by side spirally along the barrels from end to end; also broaching, planing, or
finishing and rifling barrels for fire-arms without removing them from or adjusting
them relatively to their supports, and also subsequently chambering them without
removing them from or adjusting them relatively to their supports for the purposes
specified.
Second. The combination of a stationary strained bar, rod, or holder for cutters
or cutting instruments, and the means for presenting to such cutters or instruments
the articles to be operated upon by them.
Third. The combination with a bar, rod, or holder for cutters or cutting instru-
ments of mechanism whereby such bar, rod, or holder may be subjected longitudinally
to a tensile strain, and the cutters or instruments effectually precluded from vibrating
or moving out of position while at work.
Fourth. The combination with a bar, rod, or holder for cutters or cutting instru-
ments of a wedge impinging against the backs of the said cutters or instruments,
and a screw and nut connected with such wedge to provide for shifting the wedge
to adjust the said cutters or instruments.
Fifth. In a machine for broaching, planing, or finishing barrels for fire-arms, the
combination of stationary cutters or cutting instruments, and a barrel carrier adapted
to carry a barrel to and past the said cutters or instruments.
Sixth. In a machine for broaching, planing, or finishing barrels for fire-arms the
combination of stationary cutters or cutting instruments and a barrel carrier adapted
to carry a barrel to and past the cutters or instruments, and to simultaneously twist
or rotate it, so that the cutters or instruments will operate on it in spiral lines side
by side until the work is completed.
Seventh. In a machine for broaching, planing, finishing, and rifling barrels for
fire-arms, the combination of stationary cutters or cutting instruments, a carrier
adapted to carry a barrel longitudinally and rotate it axially past said cutters or
instruments, and mechanism controlling the engagement of the barrel carrier with
its driving mechanism, and so providing for the engagement of the latter with the
former as to produce contiguous cuts for broaching, planing, or finishing the barrel,
or isolated cuts for rifle grooves without adjusting the said barrel carrier.
Eighth. The combination with a rotary barrel-carrying spindle and driving
mechanism therefor of a clutch piece consisting of a pivotted arm provided with a
tooth, and carried by the driving mechanism, and a series of holes or recesses in a
wheel connected with said spindle, whereby the latter may be connected with the
driving mechanism in such manner as to present any part of the barrel to the
instruments employed to operate thereon.
Ninth. The combination with a rotary barrel-carrying spindle, driving mechanism
therefor, and a clutch piece for effecting the engagement of the latter with the
former, of a stop for operating said clutch piece upon contact of the latter with it in
moving backward, and for slipping out of the way of the clutch piece in its forward
movement.
Tenth. The combination with the clutch piece controlling the engagement of the
barrel-carrying spindle with its driving mechanism of an excentrically supported
shaft for the said clutch piece, whereby the latter may serve to lock the spindle to
its driving mechanism for broaching, planing, or finishing, or for rifling a barrel.

page_text: Eleventh. The combination with the barrel-carrying spindle of the springs and
plungers acting as brakes to stop the said spindle immediately upon its release from
the mechanism whereby it is driven.
Twelfth. The combination with a rotary barrel-carrying spindle of a chuck wherein
after the bar, rod, or holder for the cutters used in broaching, planing, or finishing
is removed, may be inserted a tool for chambering the barrel before its removal.
Thirteenth. The combination with a bar, rod, or holder for cutters or cutting
instruments, and with means for subjecting it to a tensile strain, of apparatus con-
nected with the straining mechanism for indicating the strain exerted by it.
In witness whereof, I, the said William Robert Lake, have hereunto set my
hand and seal, this Second day of January, in the year of our Lord One
thousand eight hundred and seventy-eight.
W* ROB'. LAKE. (L.S.)
·