Improvements in Coal and Rock Drills.
Year: 1894

page_text: Date of Application, 29th Jan., 1894
Complete Specification Left, 3rd Oct., 1894-Accepted, 3rd Nov., 1894
PROVISIONAL SPECIFICATION.
[Communicated from abroad by JOSEPH ANDREW JEFFREY, of Columbus,
County of Franklin and State of Ohio, in the United States of America,
Manufacturer.]
Improvements in Coal and Rock Drills.
I, OLIVER IMRAY of No. 28 Southampton Buildings, Chancery Lane, in the
County of London, Chartered Patent Agent, do hereby declare the nature of this
invention to be as follows:-
My invention relates to a new and improved coal and rock drill, as will be
hereinafter explained referring to the accompanying drawings in which,
Fig. 1 is a side elevation of a drill mechanism embodying my improvements.
Fig. 2 is an elevation from the rear.
Fig. 3 is a plan view of the support for the drill, engine, feed nut, etc.
Fig. 4 is a rear view of Fig. 3.
Fig. 5 is a section on the line X X, Figs. 3 and 6.
Fig. 6 is a view partly in side elevation, partly in section of the engine, the
gearing and the feed devices detached.
J
Fig. 7 is a section on the lines Y. Y Figs. 3 and 4.
Fig. 8 is a partial vertical section of the engine.
Fig. 9 is a vertical cross section of the engine.
Figs. 10. 11. 12. 13. and 14. shew details of the drill advancing mechanism.
Fig. 15 shows, detached, the clamp for the supporting rod.
Figs. 16 and 17 show the master wheel and screw stem.
In the drawings, A indicates an upright or light portable frame to support the
operative parts in any desired position. It has screw rods at the top and bottom
with sleeves and hand wheels, adapted to engage with the screws and to clamp the
machine to the floor and the roof of the mine, these parts being shown at a and a'.
The vertical legs a² of the main frame receive the guiding and supporting blocks
which carry the operative parts. These blocks are indicated by B B, and are
provided with set screws b by which they can be fastened after vertical adjustment.
Each block has a socket or recess at , and in these are mounted the trunnions of
the engine and drill carrier. This is indicated by C. Preferably it is cast with a
tube below it and with projections or ears C2 in the rear and also with the
trunnions dd, the latter fitting as aforesaid in the sockets or recesses in
blocks B.
These
The feeding devices for the drill are supported by the plates D, D¹ bolted to the
top and bottom of the aforesaid ears or lugs C. Between plates D, D' are placed
the inner and the outer vertical plates d', a, see Figs. 13, 14, 3 and 7.
several plates form a guide chamber for the sections G G of the divisible nut,
which are placed parallel to the threaded rod, F. Each section consists of a
threaded brass part g' and the carrier part g2 into which the brass is inserted and
from which it can be withdrawn when the threads are worn or broken and another
brass can be inserted. Each nut section has a pin g inserted into it, and by means
of which it can be moved toward and from the threaded shaft F. Such motion is
effected by means of the plate H, and the lever I. Plate H lies above the nut
sections G, G, and below the plate D, the latter having flanges d' at its edges
which hold plate H in place, but between which flanges it can slide to and fro. It

page_text: has two inclined slots through which pass the pins
9,
of the nut sections.
It
also has a pin H' which passes through a slot d' in the frame plate D. With this
pin the lever I engages, said lever being pivoted at i, having a handle I' and
having a slot through which the aforesaid pin H¹ passes. When lever I is moved
forward or back plate H is correspondingly moved and it by means of its slots h
and the pins g causes nut sections G G to move toward and from the threaded
stem F.
By means of these devices I effectually obviate the tendency of the nut sections
to move away from or become loose on the threaded stem after adjustment, as the
leverage is applied in the most advantageous way and the sections are practically
rigidly locked in place. To fasten the lever I in any position desired, 1 employ a
clamping device, consisting of a spring gripper J and a set screw and nut at j by
which the grip clamp J can be held against a plate de (preferably an extension of
plate D) and held firmly, so that the joltings and jars experienced by the machine
when in operation will not act to loosen the nut sections. Even a little looseness
causes danger of breaking or stripping the threads of the nut. But when the
parts G are mounted in a retaining frame and are moved, guided and locked in the
way described, I overcome these difficulties.
The edge of the plate
is concentric with the pivot i. hare ears or wings
on the lever I which cover the slot d', and prevent the access of dirt, grit, and
foreign substances to the threads. In fact in this construction, the nut threads are
practically enclosed entirely tight, and foreign materials cannot obtain access.
When compressed air, steam or any analogous agent is to be used, I provide an
improved form of engine. It is indicated by K and comprises the two casing
castings k, k¹, the former providing the end wall 2 and shaft bearings k³ k*, and
the latter providing the opposite end wall and the bearings Ak. The piston K
is secured to shaft K2 which latter projects through both bearings k* and kand
carries at one end the pinion 8 and at the other pinion k°. The abutment L is
rotary and is secured to a shaft / mounted in the aforesaid bearings ko and k³ and
passing through the latter and carrying a wheel geared to the aforesaid wheel k*
on the piston. The piston K' has a wing which receives the pressure and travels
in the pressure chamber until the exhaust passage is reached.
The
abutment L has a recess 2 which receives the wing and permits it to freely
rotate.
The resistance at the point of the bit is of such nature as to interfere with
continuous rotation, said points meeting alternately spots of softer material, and
spots exceedingly hard. When the bit is working on the soft material the engine
tends to speed up, but the instant it strikes harder objects it tends to not only slow
down but to even suddenly stop. When the abutment at L is reciprocating and
not rotary, it not only fails to assist the engine in overcoming these difficulties but
tends to increase them. By combining with the piston K₁ a rotary abutment such
as at L, the momentum of the latter acts to assist the shaft K2 and its pinion k³ in
overcoming the points of resistance.
In the earlier drilling engines, it was customary to apply the hose for the air at
the top of the engine. But when the parts are mounted on trunnions in a frame of
the character herein shown, the hose is a serious objection when arranged in that
manner. In the present case it will be seen that it is led backward, the supply
and exhaust ports being arranged to permit such application of it. By having the
blocks at B so arranged as to support the trunnions outside of the vertical planes
of the standards a² the engine and the operative parts can be easily dismounted
and replaced without removing the blocks.
For drilling purposes, I bave found this engine to be the most effective and
economical of all those within my knowledge.
The aforesaid pinion engages with the master wheel M. This wheel is
formed with a central elongated tubular hub at m and with internal peripheral
teeth m'. The hub part m is mounted in the aforesaid stationary tube C¹ of
the carrier. After the wheel has been put in place it is held there by a

page_text: clip M which engages with the flanges c on the end of tube C¹. The threaded
stem F is provided with one or more grooves f, and the tubular hub m of wheel M
has one or more detachable gibs or feathers m² which fit snugly in grooves fand
cause the rotation of stem F. At the same time its advance will be caused if the
nut sections G, G, are clamped in engagement with it. The stem F has a socket E
in which bit E' is fastened.
It will be seen that a universal adjustment of the bit is provided for, as the
carrier C, C, C2, can be rocked vertically on trunnions d, to any line relative to the
horizon, and the whole apparatus can be turned around a vertical line through
the screws and sleeves at a, a¹. It will also be seen that the parts at B, h, permit
the adjustment of the carrier C, C', C, and its attachments, vertically, bodily, in
relation to the frame A.
In order to fasten the vertically vibratable parts after being adjusted to the
desired line, I employ a brace rod N pivoted at n, and extending to and through a
clamp O. The latter pivoted on a vertically adjustable rod o, secured by clamp
blocks o' to the standards a². The clamp O has a locking cam O¹, and a bandle or
lever O. After the bit and stem F have been turned up or down, as desired, the
cam O' is turned so as to tightly bite against the brace or support M.
29th day of January 1894.
ABEL & IMRAY,
Agents for the Applicant.
Improvements in Coal and Rock Drills.
I, OLIVER IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the
County of London, Chartered Patent Agent, 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 a new and improved coal and rock drill as I shall
describe referring to the drawings accompanying my Provisional Specification.
Fig. 1 is a side elevation of a drill mechanism according to this invention.
Fig. 2 is an elevation from the rear.
Fig. 3 is a plan of the support for the drill, engine, feed nut, &c.
Fig. is a rear view of the same.
Fig. 5 is a section on the linear of Fig. 3.
Fig. 6 is an elevation partly in section of the engine, the gearing and the feed
devices being detached.
Fig. 7 is a section on the line y y of Figs. 3 and 4.
Fig. 8 is a partial vertical section of the engine.
Fig. 9 is a vertical cross section of the engine.
Figs. 10, 11, 12, 13 and 14 show details of the drill advancing mechanism.
Fig. 15 shows the clamp for the supporting rod.
Figs. 16 and 17 show the master wheel and screw stem.
A indicates an upright or light portable frame to support the operative parts in
any desired position. It has screws at the top and bottom with sleeves and hand
wheels a a¹ to clamp the machine to the floor and the roof of the mine.
The vertical legs a² of the main frame receive the guiding and supporting
blocks B which carry the operative parts which are provided with set screws
by which they are fastened at the desired height. Each block has a socket or
recess at ', and in these are mounted the trunnions of the engine and drill
carrier C. Preferably it is cast with a tube C¹ below it and with projections or
ears in the rear and also with the trunnions d d which fit in the sockets b¹ of the
blocks B.
The feeding devices for the drill are supported by the plates D D' bolted to the

page_text: top and bottom of the ears C², and between the plates D D¹ are placed the inner
and the outer vertical plates d¹ d' see Figs. 13, 14, 3 and 7. These plates form a
guide chamber for the sections G G of the divisible nut.
Each section consists of a threaded half bush g' and the part g2 holding the bush
which can be withdrawn when worn or damaged so that another bush can be
inserted.
In each part g2 there is a pin g by which it can be moved toward and from the
screw F by the movement of the plate H by the lever I. The plate H lies above
the parts G G and below the plate D, which has flanges at its edges between
which the plate H can slide to and fro. It has two inclined slots h through which
pass the pins gg.
It also has a pin H₁ which passes through a slot d in the plate D and a slot i in
the lever I which is pivotted at i, and has a handle 1'. When the lever I is moved
forward or back the plate H is correspondingly moved and it by means of its
slots and the pins g causes the nut sections G G to move toward and from the
screw F.
By this arrangement the nut sections do not tend to move away from or become
loose on the screw. The lever I is held in any position by a clamping device,
consisting of a spring gripper J and a screw and nut j by which the gripper
can
be made to clamp the edge d' of the plate D; thus joltings and jars of the machine
do not tend to loosen the nut which even a little looseness might damage.
are wings on the lever I which cover the slot d and prevent access of dirt
or grit to the screw threads.
Thus the threads are practically quite enclosed.
The engine to be worked by compressed air, steam or other elastic fluid is
indicated by K and has a casing consisting of a part k forming the end 2 and
having shaft bearings k³k and k¹ forming the cover and having the bearings ke k'.
The piston K' is fixed on the shaft K2 which projects through both the bearings k*
and and carries at the one end the pinion 8 and at the other end the
pinion ko.
The abutment L is rotary and is fixed on a shaft mounted in the bearings k
and k³, passing through k³ and carrying a pinion geared to the pinion 8.
The piston K' has a wing which receives the pressure and travels in the
cylinder ko until the exhaust passage " is reached.
The abutment L has a recess which receives the wing and permits it
to pass.
The resistance to the drill owing to its meeting alternately spots of soft and hard
material so far varies that the engine tends to race when the material is soft but
when the drill meets harder objects the engine tends to run slowly or even to stop.
By combining with the piston K'a rotary abutment such as at L instead of a
reciprocating abutment such as has been sometimes employed the momentum assists
the pinion in overcoming the unequal resistances.
The pinion gears with the internal teeth of the main wheel M which has a
tubular boss m. The boss m is mounted in the stationary tube C' of the carrier
and held by a clip M' which engages with the flanges e on the end of tube C'.
The feed screw F has one or more grooves f, and the boss m of the wheel M has
one or more detachable gibs or feathers m² which fit in the grooves and cause the
rotation of F, so that the drill is advanced if the nut sections G G are engaged with
the screw which has a socket E holding the drill E.
A universal adjustment of the drill is provided for, as the carrier C, C1, C2 can
be raised and lowered and rocked vertically on the trunnions d, and the whole
apparatus can be turned around the vertical axis of the screws and sleeves a a².
In order to fix the drill at the desired height a rod N pivotted at n extends
through a clamp O which is pivotted on a vertically adjustable rod o, secured by
clamp blocks of to the standards a². The clamp has a locking cam O' with
handle O2. After the bit and stem F have been turned up or down, as desired, the
cam
is turned so as to tightly bite against the brace or support M.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The combination with a rock or coal drill and the parts for supporting and
actuating it, of a divided feed nut, the obliquely slotted plate, and the lever for
moving and clamping it, substantially as set forth.
2. The combination with the coal or rock drill, the main wheel M, the engine
with rotary piston and pinion gearing with the main wheel and a rotary abutment
for the piston, substantially as and for the purposes set forth.
3. The combination with the drill, the engine, the carrier mounted on trunnions
and the frame with uprights and clamping blocks, brace rod and cam lever,
substantially as described.
Dated this 2nd daw of Ontahan 1004
ABEL & IMRAY,
Agents for the Applicant.