Improvements in Rotary Drilling or Boring Machines or Apparatus Specially Applicable to Rock Drills.
Year: 1885

page_text: Improvements in Rotary Drilling or Boring Machines or
Apparatus Specially Applicable to Rock Drills.
I, WILLIAM LLOYD WISE, of N° 46 Lincoln's Inn Fields, in the County of
Middlesex, Consulting Engineer and Patent Agent, do hereby declare the nature
of this invention (a communication to me from abroad by Camille Bornet, of
145, Boulevard Péreire, Paris, France, Engineer,) to be as follows:-
In a drilling machine according to this invention the tool is forced forward by
a pressure which is elastic, so that if the rate of feed be too great, or if the rock or
other material being drilled is not homogeneous, the pressure upon the tool increases
gradually and the attendant is able to alter the rate of cut before the tool is
damaged. This elastic pressure may be obtained by mechanical means or by means
of a compressed fluid.
A drill according to this invention and wherein the former arrangement obtains.
is illustrated in Figs. 1 and 2, and a drill according to this invention wherein the
latter arrangement obtains is illustrated in Figs. 3, 4 and 5 of the annexed sheet of
drawings which is added by way of example only.
The means by which the drill is rotated are the same whatever be the source of
the elastic pressure. The drill holder slides in its rotary motion through the centre
of the gear wheel d, which is set in motion by the pinion e to which motive power
is imparted by the fly wheel V provided with a crank handle or a pulley. The
cylinder a which forms the framing of the drill carries at its rear end, a gear
wheel N similar to the wheel d, and having a diameter equal to that of the latter
wheel. Upon the boss of the wheel N is formed a circular groove in which rotate
the anti-friction rollers mounted upon studs introduced through an opening
formed in the lower part of the cylinder a
The drill-holder b is a hollow tube provided with a screw thread at its rear end.
At the other end there is a chuck to receive the drill. This chuck and the wheel d
are keyed to the tube b.
The pressure screw e as shewn in Fig. 1 passes through the screw threaded part
of the tube b and is provided with a collar cand an extension I. The part I is

page_text: surrounded by a spiral spring f the extremities of which press against the collar c¹
of the screw and the bottom of the cavity in the boss of the wheel N.
This cavity
forms a spring box. The rod I traverses the cavity and is provided with a nut by
which an initial compression can be given to the spring S. The wheel and the
extension I are connected by a feather key not shewn in the drawing. Thus, the
screw C has a spring or elastic connection with the nave of the wheel N and
moves therewith. The wheel N gears with a pinion f whenever it is desired, the
engagement being effected by means of a forked lever P. In connexion with the
pinion there is a grooved cone pulley driven by a cord from another pulley
mounted upon the shaft of the front pinion e¹. The result of the arrangement of
these two gears is that the front gear causes the tool to move forward into the
rock, for at each revolution of the drill spindle the latter advances one thread of
the internal screw. The rear gear when rotated in one direction tends to draw
back the drill spindle, while in the opposite direction it forces it forward. Thus by
the differential action of the two gears any rate of feed can be obtained between
zero, and one equal to two or three times the pitch of the screw per revolution.
The drill may also be drawn backwards out of the material. By causing the screw
to rest simultaneously upon a spring and a set of rollers there is provided for it an
elastic pressure, and at the same time the friction due to this pressure is reduced to
a very small amount. When the pressure is obtained by means of a compressed
fluid hydraulic pressure is a suitable agent and this may be rendered more elastic
by combining with it pneumatic pressure, as for instance by an air vessel on the
water main.
Figs. 3, 4 and 5 of the accompanying drawings show respectively a longitudinal
section a transverse section and a plan or top view of a drill according to this
invention, wherein hydraulic pressure is employed.
In these views there is also shewn a mode of arranging the gear actuating the
tool upon a collar which enables this gear to be placed in any suitable position upon
the cylinder, without coming into contact with the latter.
Figs. 3 and 6 shew the arrangement of this collar, Fig. 6 being a vertical and
transverse section thereof.
It will be seen that the cylinder a is modified in its details; the packings bare
formed of a piece of beaten leather within which a brass wire is wound into a
suitable number of convolutions.
The piston is of a simple form in so far that its packing is merely composed of
leather c and that the extremity of the tube or tool holder d is secured in it by
means of a ring e only, enabling the said tool holder to freely follow the rotary
motion of the drill (See Fig. 3). The admission and emission of water is effected by
a single cock f. This cock is always close at hand to the driver and a stop piece
or index serves, when necessary, to hold the handle in the required position.
To convey the water from the pressure pipe to the cylinder there is employed a
union shewn in Fig. 6bis which can be connected without difficulty and is composed
of a double articulated hook g engaging upon a pin h of the pressure pipe. In
order to place the gear i in any suitable position upon the cylinder, so that the fly
wheel shall always be in a convenient position for the attendant the bracket
supporting the said gear is fixed or formed integrally with a cast iron ring or
collar K capable of turning with slight friction upon the apparatus and of being
held in the required position by means of a tightening screw or by any other
equivalent device.
;
When the machine is to be used in levels or galleries it is provided with the
carriage shewn in Figs. 7, 8 and 9.. The uprights m of the carriage are formed of
channel irons on which moves the slide n which can be fixed at a suitable height.
This slide carries laterally the bracket o supporting the journals of the suspending
collars of the machine; the strap p closes the bracket at its upper part and thus
secures the journals of the machine. In order to set the latter up, it is therefore
sufficient to bring the strap down by turning it upon its pivot, to place the drilling

page_text: or boring machine upon the bracket o and to bring the said strap p serving to fix
the machine, back upon the bracket; the machine is thus rapidly mounted.
Fig. 7 shews the basis or crown forming the foot of the carriage and Fig. 10
shews the arrangement of the clutch of the carriage head.
When for want of space, the fly wheel imparting a rotary motion to the tool
cannot be operated with facility there is used in substitution of this wheel, the
arrangement of lever shewn in Figs. 11 and 12. This lever is double acting, that
is to say, that the alternate to and fro motion imparted thereto is converted into a
continuous rotary motion applied to the tool holder. This double acting lever is
composed of the nut q engaging with a polygonal part of the tool holder, in order
to set it in motion; of a ratchet wheel doubly toothed, that is to say, upon its
upper and lower surface; of a double pawlf corresponding with the doubly toothed
ratchet wheel; and of a collar t fixed upon or formed integrally with the arms u
of the lever.

page_text: Apparatus Specially Applicable to Rock Drills.
I, WILLIAM LLOYD WISE, of N° 46 Lincoln's Inn Fields, in the County of
Middlesex, Consulting Engineer and Patent Agent, do hereby declare the nature
of this invention (a communication to me from abroad by Camille Bornet of
145, Boulevard Périere, Paris, France, Engineer) and in what manner the same
is to be performed to be particularly described and ascertained in and by the
following statement:-
-
In a drilling machine according to this invention the tool is forced forward by
a pressure which is elastic, so that if the rate of feed be too great, or if the rock
or other material being drilled is not homogeneous, the pressure upon the tool
increases gradually and the attendant is able to alter the rate of cut before the
tool is damaged. This elastic pressure may be obtained by mechanical means or
by means of a compressed fluid.
A drill according to this invention and wherein the former arrangement obtains
is illustrated in Figs. 1 and 2, and a drill according to this invention wherein the
latter arrangement obtains is illustrated in Figs. 3, 4 and 5 of the annexed sheet
of drawings which is added by way of example only.
The means by which the drill is rotated are the same whatever be the source
of the elastic pressure. The drill holder slides in its rotary motion through the
centre of the gear wheel d, which is set in motion by the pinion e to which motive
power is imparted by the fly wheel V provided with a crank handle or a pulley.
The cylinder a which forms the framing of the drill carries at its rear end
a gear wheel N similar to the wheel d and having a diameter equal to that of
the latter wheel.
Upon the boss of the wheel N is formed a circular groove in which rotate the
anti-friction rollers z z mounted upon studs introduced through an opening formed
in the lower part of the cylinder a.
The drill-holder b is a hollow tube provided with a screw thread at its rear end.
At the other end there is a chuck to receive the drill. This chuck and the
wheel d are keyed to the tube b.
The pressure screw c as shown in Fig. 1 passes through the screw threaded part
of the tube b, and is provided with a collar c¹ and an extension I. The part I is
surrounded by a spiral spring a the extremities of which press against the collar c¹
of the screw and the bottom of the cavity in the boss of the wheel N.
The
This cavity forms a spring box. The rod I traverses the cavity and is provided
with a nut by which an initial compression can be given to the spring 8.
wheel and the extension I are connected by a feather key not shown in the
drawings. Thus the screw c has a spring or elastic connection with the boss
of the wheel N and moves therewith.
The wheel N gears with a pinion f whenever it is desired, the engagement being
effected by means of a forked lever P. In connexion with the pinion there is

page_text: a grooved cone pulley driven by a cord from another pulley mounted upon the
shaft of the front pinion e. The result of the arrangement of these two gears
is that the front gear causes the tool to move forward into the rock for at each
revolution of the drill spindle the latter advances one thread of the internal
screw.
The rear gear when rotated in one direction tends to draw back the drill
spindle, while in the opposite direction it forces it forward. Thus by the
differential action of the two gears any rate of feed can be obtained between
zero and one equal to two or three times the pitch of the screw per revolution.
The drill may also be drawn backwards out of the material.
By causing the screw to rest simultaneously upon a spring and a set of rollers
there is provided for it an elastic pressure, and at the same time the friction due
to this pressure is reduced to a very small amount. When the pressure is obtained
by means of a compressed fluid hydraulic pressure is a suitable agent and this
may be rendered more elastic by combining with it pneumatic pressure, as for
instance by an air vessel on the water main.
Figs. 3. 4. and 5. of the accompanying drawings show respectively a longitudinal
section, a transverse section, and a plan or top view of a drill according to this
invention, wherein hydraulic pressure is employed. In these views there is also
shown a mode of arranging the gear actuating the tool upon a collar which enables
this gear to be placed in any suitable position upon the cylinder, without coming
into contact with the latter.
Figs. 3. and 6. show the arrangement of this collar, fig. 6. being a vertical and
transverse section thereof.
It will be seen that the cylinder a is modified in its details; the packings bare
formed of a piece of beaten leather within which a brass wire is wound into a
suitable number of convolutions. The piston is of a simple form in so far that
its packing is merely composed of leather c and that the extremity of--the tube or
tool holder d is secured in it by means of a ring e only, enabling the said tool
holder to freely follow the rotary motion of the drill (See fig. 3). The admission
and emission of water is effected by a single cock f. This cock is always close at
hand to the driver and a stop piece or index serves when necessary to hold the
handle in the required position.
To convey the water from the pressure pipe to the cylinder there is employed
a union shown in fig. 6, which can be connected without difficulty and is composed
of a double articulated hook g engaging upon a pin / of the pressure pipe.
In order to place the bracket in any suitable position upon the cylinder, so
that the fly wheel shall always be in a convenient position for the attendant, the.
bracket supporting the said gear is fixed or formed integrally with a cast iron ring
or collar K. capable of turning with slight friction upon the apparatus and of being
held in the required position by means of a tightening screw 1 or by any other
equivalent device.
When the machine is to be used in levels or galleries it is provided with the
carriage shown in Figs. 7, 8, and 9. The uprights m of the carriage are formed
of channel irons on which moves the slide n which can be fixed at a suitable
height. This slide carries laterally the bracket o supporting the journals of the
suspending collars of the machine; the strap p closes the bracket at its upper part
and thus secures the journals of the machine. In order to set the latter up, it is
therefore sufficient to bring the strap down by turning it upon its pivot, to place
the drilling or boring machine upon the bracket o and to bring the said strap P
serving to fix the machine, back upon the bracket; the machine is thus rapidly
mounted.
Fig. 7. shows the basis or crown forming the foot of the carriage and fig. 10
shows the arrangement of the clutch of the carriage head. When for want of
space, the fly wheel imparting a rotary motion to the tool cannot be operated with
facility, there is used in substitution of this wheel, the arrangement of lever shown
in figs. 11 and 12.

page_text: This lever is double acting, that is to say, that the alternate to and fro motion
imparted thereto is converted into a continuous rotary motion applied to the tool
holder. This double acting lever is composed of the nut q engaging with a
polygonal part of the tool holder, in order to set it in motion; of a ratchet wheel
doubly toothed at r that is to say upon its upper and lower surface; of a double
pawls corresponding with the doubly toothed ratchet wheel; and of a collar t
fixed upon or formed integrally with the arms u of the lever.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is —
1. In a rotary drilling machine the mechanism for feeding the tool comprising
a driving wheel N, with the boss recessed to receive the rollers z. z¹, in combination
with the feeding screw c having a shoulder or collar c³ resting on an elastic support
or abutment such as a coiled spring, substantially as described and for the purpose
specified.
2. In a rotary drilling machine in which the tool-holder is fed forward by
hydraulic pressure the ring e for connecting the tool holder to the piston sub-
stantially as described with reference to Figs. 3 to 6.
3. In a rotary drilling machine mounting the bracket i carrying the driving
gear on a collar k, turning freely on the cylinder, as described and for the purpose
specified.
4. The means substantially as described for the suspension of a boring tool on
its carriage, consisting of a slide n carrying the support o and the attachment
ring p as described.
5. The combination with a rotary boring tool of a double-action lever to operate
the tool, a disc q, a ratchet wheel with a double set of teeth r, a double pawls,
and the collar t, as described with reference to Figs. 11 and 12, and for the purpose
specified.
.
6. The improved rotary drilling machine constructed arranged and operating
substantially as described with reference to Figs. 1 and 2, and to Figs. 3 4 and 5
of the drawings.