Improvements in Pipe Boring Machines.
Year: 1898

page_text: Date of Application, 26th July, 1898-Accepted, 8th Oct., 1898
COME LEIE DIUITIATION.
Improvements in Pipe Boring Machines.
I, BIRNEY CLARK BATCHELLER, of 1518, North Eifteenth Street, in the City
and County of Philadelphia, in the State of Pennsylvania, United States of
America, Mechanical Engineer, do hereby declare the nature of this invention,
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:--
My invention relates to mechanism for boring pipes, such, for instance, as are
used in pneumatic pipe mains, and has for its object to provide an accurate,
simple and effective tool for this purpose.
The nature of my improvements will be best understood as described in con-
nection with the drawings in which they are illustrated, and in which,
Figure 1 is a front elevation of my improved machine.
Figure 1 an attachment for the top of the machine omitted for lack of space
in Fig. 1.
Figure 2 is a side elevation of the machine.
Figure 2 an attachment for the head of the machine also omitted for lack
of space in Fig. 2.
Figure 3 is a sectional elevation of the pedestal forming an important feature
of my invention, taken as on the section line 2-2 of Fig. 1.
Figure 4 is a cross sectional view on the line 4-4 of Fig. 3.
Figure 5 is an enlarged sectional view through the upper part of the machine,
taken as on the section line 1-1 of Fig. 1.
Figure 6 is a plan view of the grip holding the upper portion of the pipe and
the devices for adjusting the same, and
Figure 7 is a cross-sectional view of this adjusting device, taken on the section
line 3-3 of Fig. 5.
A indicates the flooring, above which is situated the framing B supporting the
upper portion of the machine while, as shown, the pedestal is situated below the
flooring. Formed with or secured to the frame B is the platform C having, as
shown, a guideway C₁ formed in it, and on each side of the guideway perforated
lugs, as indicated at C, to give passage to the bolts G. D is a slide resting on
the platform C and having a tongue or rib I¹ fitting in the guideway C¹. The
slide D is formed with a guideway D² running in a transverse direction to the
guideway C¹, and is also provided with slotted perforations D³ through which the
bolts G can pass. A rearwardly extending arm D and an adjusting screw E
enables the slide 1) to be set forward or backward at will. F is a slide resting
on top of the slide D and provided with a tongue or projection F fitting in the
guideway D. The slide F is also provided as shown with slotted perforations Fa
through which the bolts G project and is adjusted from side to side by means
of the set screws HH, best shown in Figs. 1 and 2. Secured to a forwardly
projecting portion of the slide F is the pipe gripping device indicated at I I¹,
the portion I¹ being separable from the head as shown, and held thereto by
means of bolts I I.

page_text: In practice the pipe gripping device I¹ 12 is secured about the upper end of
the pipe, the lower end of which is secured in another gripping device, to be
hereafter described, and the pipe is then adjusted by means of the slide D and
the-slide so as to make its alignment with the boring tool perfect. Of course
the limitations of adjustment are thus imposed by the length of the slots F2
and 13, see Figs. 6 and 7, and of course also a proper adjustment being once
attained little or no adjustment will be necessary for the proper aligning of other
pipes of the same.size.
At
J indicates the main driving shaft of the machine, having, as shown, a bearing
in a portion, B, of the frame B, and having attached to its outer end fast and
loose pulleys, indicated at J and J2, and to its inner end a mitre wheel, indicated
at J³. This mitre wheel engages with a mitre wheel K¹ secured on a vertical
shaft K having a bearing indicated at B2 and having at its upper end the
spur wheel K2 which is in engagement with the gear wheel L secured to a hub L¹
which, by means of a feather L2 working in a longitudinal slot, indicated at L*,
of a shaft L3 rotates said shaft while permitting it to move freely up and down;
the shaft having, as shown, bearings to preserve its alignment at B3 and B.
the upper end of the shaft L³, see Fig. 1, in a shackle L5 from which the shaft
is suspended by means of a rope L10 passing over pulleys L9 L³ and having a
counterweight L", see Figs. 1 and 2, attached to its free end; rearward pro-
jections Le from the shackle L are in engagement with a guiding bar L' which
assists in holding the shaft in proper position and also prevents any tendency
of the shackle to turn with the shaft, L8 indicating stay rods for holding the
bar L' in position. M is the hub of a grooved pulley the rim of which is indicated
at M¹, the hub turning freely on the shaft L³ and being formed so as to be
readily engaged by a clutch M², said clutch being splined to the shaft L³ so as
to turn with it and so that when in engagement with the hub M it will also turn
the grooved pulley. M³ is a lever pivoted at M4 and serving to engage and
disengage the clutch M², from the pulley hub M.
Passing now to the pedestal which is indicated by the symbol N, N¹ is a
shaft having a bearing in the pedestal and also in the bracket Q3 the shaft N
carrying a mitre wheel N2 which engages the mitre wheel R, the hub R¹ of
which is, as shown, supported on the enlarged and flanged lower end S1 S2 of a
hollow threaded cylinder S which passes through a central opening in a portion N
of the pedestal and is secured thereto by the nut S3. Below the hub R¹ of the
mitre wheel R, and cast with or firmly secured thereto, run guideways R² R³
upon which rest the internal threaded sections T T, the threaded portions being
indicated at t and the two sections being held together and clamped upon the
threaded rod P by means of the bolts T¹ T¹, see Fig. 4. At the upper end of the
pedestal N is the cup shaped support N upon which the lower end of the pipe
is rested and in which it is adjusted to a proper centre by means of the adjusting
screws N³. S indicates a feather in the cylinder S which lies in a longitudinal
groove pin the threaded rod P and which said rod is engaged by the end
sections T T and by means of which feather the rod is prevented from turning
in the pedestal.
Motion is communicated to the shaft N¹ from the grooved pulley M M by
means of the rope Q5 which passing first over a pulley Q, then under a
pulley Q¹ upon which is supported a counterweight q¹ then over a second pulley q
in line with the pulley Q and then under a pulley indicated at Q2 secured to
the shaft N¹ and thence back over a pulley Q, Fig. 1, to the pulley M M¹.
O indicates the boring tool, which may be of any convenient construction, and
is secured to the lower end of the shaft L³ while to the lower end of the boring
tool by means of a head P¹ which can turn freely in the tool is secured the
threaded rod P, the attachment being indicated at P2. At U I have indicated an
opening or tube through which the rod P can pass.
The operation of the tool, as a whole, will be readily followed. I have already
described the means and method of adjusting the upper end of the pipe and have

page_text: stated that the lower end is adjusted in the cup shaped receptacle at the top of
the pedestal by means of the adjusting screws No, the pipe being in proper align-
ment the shaft L³ is rotated by the mechanism described causing the boring
tool, O to turn. The lever M³ is then actuated to engage the clutch M³ with a
pulley hub M thereby transmitting motion through the rope gear and mechanism
described to the mitre wheel R and to the sectional nut T T supported on said
mitre wheel. The rotation of this end which is in engagement with the threaded
rod P draws it and the horing tool 0 gradually downward through the pipe,
there being little or no weight to influence the motion of the boring tool as the
counterweight L supports the weight of the moving parts suspended upon it.
When the pipe is completely bored the bolts T are relaxed permitting the nut
sections T T to move apart and the rod P to be moved rapidly upward carrying
with it of course the boring tool.
As the threaded feed rod P is moved down by the action of the nut T T it is
apt to carry more or less of the metallic particles cut off by the tool ( with it
which will tend to cut away the threads of the nut, and to avoid this I have
found it desirable to form longitudinal recesses through the threads of the
nut section through which said particles can and will escape and which will
keep, the nut threads from being cut away.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
1. In a machine for boring pipes, the combination with a boring tool, as O,
having connected at its rear end means for turning said tool, of a feed screw.
as P, connected to the tool in position to extend through the pipe in advance thereof,
said feed screw. being so connected to the tool as to move longitudinally with it
while being unaffected by its rotative movement, a pipe rest, as pedestal N, a
feed nut, as T T, adapted to engage the feed screw P and means secured in the
pipe rest for actuating said nut and causing the tool 0 to feed through the pipe.
2. In a machine for boring pipes, the combination with a boring tool, as 0,
and means for turning said tool connected at its rear end, of a feed screw as P,
connected to the tool in position to extend through the pipe in advance thereof,
said feed screw being so connected to the tool as to move longitudinally with
it while being unaffected by its rotative movement, a pipe rest, as pedestal N,
a feed nut as T T adapted to engage the feed screw P, and means secured in the
pipe rest and driven synchronously with the mechanism for turning the tool
for actuating said nut and causing the tool 0 to feed through the pipe.
3. In a machine for boring pipes the combination with a vertically movable
boring tool, as 0, and means for turning said tool connected at its rear end,
of a feed screw, as P, depending from said tool, said feed screw being so con-
nected to the tool as to move longitudinally with it while being unaffected by
its rotative movement, a pedestal, as N, adapted to serve as a rest for the lower
end of the pipe and situated below the tool O, a feed nut, as T T, adapted to
engage screw P, means secured in the pedestal for rotating said nut to cause the
tool to feed through the pipe.
4. In a machine for boring pipes, the combination with a vertically movable
boring tool, as O, means for counterbalancing, and means for turning said tool,
of a feed screw, as P', depending from said tool, a pedestal, as N, adapted to
serve as a rest for the lower end of the pipe and situated below the tool O, a
feed nut, as T T, adapted to engage screw P, means secured in the pedestal for
rotating said nut to cause the tool to feed through the pipe.
5. In a machine for boring pipes substantially as described, a pedestal N
having a pipe rest platform N and means for centring the pipe thereon, in
combination with a feed screw P, means for engaging said screw to prevent its
turning in the pedestal but without interfering with its longitudinal movement,

page_text: a feed nut adapted to engage screw P supported on the pedestal and means for
rotating said nut.
6. In a machine for boring pipes, a pipe rest platform N and means for
centring the pipe thereon, in combination with a feed screw P, means for
engaging said screw to prevent its turning in the pedestal but without interfering
with its longitudinal movement, a gear wheel Ŕ having nut bearings, as R2,
a split feed nut, as T T, secured in said bearings, means as bolts T¹ for securing
the parts of the feed nut together, and means for rotating gear wheel R.
7. In a machine for boring pipes, a pipe rest platform N4 and means for
centring the pipe thereon, in combination with a feed screw P, means for
engaging said screw to prevent its turning in the pedestal, but without interfering
with its longitudinal movement, a gear wheel R having nut bearings, as R³,
a split feed nut, as T T, having one or more longitudinal recesses, as t t cut
through its threads secured in said bearings, means as bolts T₁ for securing the
parts of the feed nut together, and means for rotating gear wheel R.
8. In a machine for boring pipes, a pipe rest platform, as N, and means for
centring a pipe end thereon in combination with a pipe clamp, as I I', clamp
adjusting slides 1) and Farranged to give said clamp a universal motion, means
for clamping said slide together and to the frame of the machine to secure the
clamp and pipe in a determined position, a boring tool and means secured on the
frame for rotating said tool, a feed screw secured to the tool so as to be unaffected
by its rotation, and a feed nut connected with the pedestal aforesaid for engaging
the feed screw and moving it and the boring tool longitudinally.
9. In a machine for boring pipes substantially as described, the combination
with a vertically movable boring tool, a frame and mechanism for guiding and
rotating said tool, a pedestal for supporting the lower end of the pipe, mechanism
situated in said pedestal for longitudinally feeding the boring tool, a pulley and
rope belt system for transmitting motion from the mechanism for rotating the
tool to the pedestal, mechanism for feeding said tool and a clutch for engaging
and disengaging said mechanism.
Dated this 26th day July 1898
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.