Improvements in Rock Drills and the like.
Year: 1898

page_text: Date of Application, 28th June, 1898-Accepted, 30th July, 1898
COMPLETE SPECIFICATION,
Improvements in Rock Drills and the like.
I, ROBERT BINNIE, Manager, of Bolivar, in the County of Westmoreland and
State of Pennsylvania, United States of America, do hereby declare the nature of
my invention, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
-
This invention relates to portable drilling and mining machines of a class
adapted for use in quarries and coal mines, for producing holes for the reception
of blasting charges, and for mining coal and channelling rock.
The object of the invention is to provide a new and improved drilling machine,
which is simple and durable in construction, not liable to get out of order, very
effective in operation, and arranged for convenient adjustment to permit of
drilling in any desired direction.
The invention consists of novel features and parts and combinations of the same,
as will be fully described hereinafter and then pointed out in the claims.
Reference is to be had to the accompanying drawings forming a part of this
Specification, in which similar characters of reference indicate corresponding
parts in all the figures.
Figure 1 is a side elevation of the improvement;
Figure 2 is a cross section of the same, on the line 2-2 in Figure 1;
Figure 3 is an enlarged plan view of the improvement;
Figure 4 is an enlarged central plan view of the drill chuck, on the line 4-4 in
Figure 2;
Figure is a sectional plan view of the drill spindle and adjacent parts, the
section being taken on the line 5-5 of Figure 6;
Figure 6 is a sectional side elevation of the same;
Figure 7 is an enlarged sectional side elevation of the feed screw and nut, on
the line 7-7 in Figure 3;
Figure 8 is an enlarged sectional side elevation of the standard support; and
Figure 9 is a side elevation of an auger or twist bit to be used when working
soft rock or a coal bed.
The improved drilling machine is mounted on a suitable tripod A, carrying a
standard B formed with guideways B', on which is fitted to slide a drill frame or
carriage C, having suitable bearings for a drill spindle 1), provided with a chuck E
for carrying the drill F, or the auger F¹ shown in Figure 9. The drill spindle D
is arranged to receive a reciprocating and turning motion for drilling rock, or
only a turning motion when the auger is used in drilling in soft material or a
coal bed.
For imparting a reciprocating motion to the drill spindle 1), the following device
is provided: A cross head G is fitted to slide in suitable bearings C on the drill
frame C, and this cross head is formed with an arm G, through which passes
loosely the spindle D. Springs H and H press on opposite sides of the cross
head arm G, their ends abutting against collars H2 and H³ respectively, secured
to the drill spindle D on opposite sides of the arm G¹. The cross head G is

page_text: pivotally connected by a connecting rod I with the crank arm J¹ of a shaft J,
mounted to turn in suitable bearings in the drill frame C, and on the outer end of
the said shaft is secured a gear wheel J, in mesh with a pinion K³, secured on the
shaft of a motor K, of any approved construction.
As shown in the drawings, an electric motor is provided, which when set in
motion causes the pinion K2 to rotate the gear wheel J3 and shaft J, so that the
crank arm Jimparts a reciprocating motion to the cross head G by the connecting
rod I. On the up stroke of the cross head G, the arm G¹ presses against the
spring H and lifts the drill spindle D; and on the down stroke of said cross head,
the arm G presses on the spring H¹ and moves the drill spindle 1) in a downward
direction. It is evident that in either case a yielding connection is established
between the cross head and the drill spindle, so that when the machine is working,
all percussion and jar incident to the drill F striking the rock is taken up by
said springs, to prevent injury to the cross head G, connecting rod I and crank
shaft J. A spring G2 is connected with the arm G1, see Figure 2, to assist in the
up stroke of said cross head G.
In order to impart a continuous turning motion to the drill spindle D, I pro-
vide the crank shaft with a worm J, in mesh with a worm wheel L, having its
hub L mounted to turn in the upper portion of the frame C, as is plainly illus-
trated in Figure 6, said hub L₁ carrying a key L engaging a longitudinal
keyway I formed in the spindle D. It is evident that when the shaft J is
rotated, as previously explained, the worm Ja by meshing with the worm wheel L
rotates the latter in its bearing in the frame C, and by the key L2 rotates
the drill spindle D), without, however, interfering with the reciprocating
motion of the drill spindle, owing to the loose connection of the key L2 with the
keyway D¹.
Now it is evident that when the machine is in operation, a reciprocating motion
as well as a continuous rotary motion is given to the drill spindle 1), to insure a
perfect drilling of the hole, without undue jar to any of the parts of the machine.
When it is desired to drill a hole with the auger 1, the connecting rod I is
disconnected from the cross head G and the crank shaft J, and only a rotary
motion is given to the drill spindle by the worm J³, worm wheel L and key L³,
as above explained.
In order to impart an intermittent feed motion to the frame C and the parts
carried thereby, I provide a threaded feed screw N, mounted to turn in the
spindle D, and provided at its upper end with a crank arm N¹ adapted to be turned
by the operator, for moving the frame C into the desired position at the time of
starting the machine, or for turning the frame C after the hole is drilled. The
feed screw N screws in a ratchet wheel nut O (Figure 7), mounted to turn in
suitable bearings in the frame C, and the ratchet wheel O¹ of the nut is adapted
to be engaged by a spring-pressed pawl 02, fitted to slide on a bolt 03, secured to
the frame C, see Figures 1 and 3, said pawl being provided with a guide arm Os
mounted to slide in a bearing 05, and pressed on by a spring 0%. The pawl 0) 2 is
further provided with an upwardly extending arm 07, carrying a friction roller OB
adapted to be engaged by the side of a cone-shaped roller 09, mounted to turn
loosely on the upper, reduced end of the spindle D, but prevented from slipping
off by a cross pin D. When the drill spindle 1) is near the end of its downward
stroke, the roller (9 engages with its inclined side the friction roller 08, so as to
push the pawl 03 inward against the tension of the spring 06, to turn the ratchet
wheel O of the nut 0, so that the said nut screws on the feed screw N and moves
the frame C, downward. On the up stroke of the spindle D the roller 09 moves
out of engagement with the friction roller (%, and the spring 06 then returns the
pawl 0 to its previous position, the feed screw N remaining stationary during this
operation.
The tripod A is provided with the usual extension legs A', carrying adjustable
weights 2, for giving the necessary stability to the tripod. The legs are pivoted
on a head A³, in which is mounted to turn the pin P¹ of a vertically-disposed

page_text: support P, in which is mounted to turn the standard B by means of a bolt B,
the nut 133 of which is adapted to clamp the standard in place on the support after
the desired adjustment is made.
A
Now it will be seen that by the arrangement described, the support P can be
turned in the head A3, and the standard B can be turned in the support l', to bring
the drill or auger into the desired position, according to the hole to be drilled.
The standard B swings in a plane approximately at a right angle to the plane
in which the support P is turned, so that any desired inclination can be given to
the drill F. The support P is preferably provided with a second pin P at the
opposite end, for fastening supplementary braces extending to the mine roof or
sides to hold the machine securely in position while using it as a force auger.
set screw 1, screwing in the head A³ serves to fasten the support P in place after
the desired adjustment is made. The chuck E for carrying the drill F or auger F
is provided with a socket E', secured on the lower end of the drill spindle D, and
in said socket is fitted to slide loosely a clamping key E, adapted to engage the
inserted end of the shank of the drill or auger, and this key is carried by and
pressed inwardly by a clip bolt E3 (Figure 4) engaged at its ends by a clip
plate E, abutting against the side of the socket E opposite the entrance of the
key E2. It is evident that by screwing up the nuts E5 on the clip bolt E³, the
latter firmly presses the key E in engagement with the drill F, to fasten
the latter in place on the socket E¹.
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. A drilling machine, provided with a drill spindle, a crank shaft, a con-
nection between the shaft and the drill spindle, for imparting a reciprocating
motion to the spindle, and a gearing for connecting the shaft with the drill spindle
for rotating the latter continuously while imparting a reciprocating motion thereto,
substantially as shown and described.
2. A drilling machine, provided with a drill spindle, a crank shaft, a connec-
tion between the shaft and the drill spindle, for imparting a reciprocating motion
to the spindle, a gearing for connecting the shaft with the drill spindle, for
rotating the latter continuously while imparting a reciprocating motion thereto,
the gearing comprising a worm wheel on the shaft, and a worm in mesh with the
worm wheel, the worin being mounted to turn and arranged to turn the drill
shaft and to allow the latter to slide in the worm, substantially as shown and
described.
3. A drilling machine, provided with a crank shaft a rod connected with the
crank, a cross head connected with the rod and mounted to slide, and springs
engaging opposite sides of the cross head and abutting against collars on the drill
spindle, substantially as shown and described.
4. A drilling machine, provided with a frame or carriage mounted to slide, a
feed screw for imparting movement to said frame, a ratchet wheel nut engaging
the said feed screw and mounted to turn in said frame, a spring-pressed pawl for
engagement with the ratchet wheel of the nut, and means for actuating said
pawl from the reciprocating drill spindle to turn the nut, substantially as shown
and described.
5. A drilling machine, provided with a frame or carriage mounted to slide, a
feed screw for imparting movement to said frame, a ratchet wheel nut engaging
the said feed screw and mounted to turn in said frame, a spring-pressed pawl for
engagement with the ratchet wheel of the nut, and means for actuating said pawl
from the reciprocating drill spindle to turn the nut, said means comprising a
friction roller on the pawl, and a cone-shaped roller on said spindle, and adapted
to engage the said friction roller on the outward stroke of the spindle, substantially
as shown and described.
6. A drilling machine, provided with a tripod, an upright support mounted to

page_text: turn on said tripod and adapted to be fastened thereto, and a standard for carrying
the drill frame and mounted to turn on said support in a plane at an angle to the
plane of motion of the support, said standard being adapted to be fastened to the
support, substantially as shown and described.
7. A drilling machine, provided with a drill chuck comprising a socket for the
drill or bit, a clamping key laterally slidable in said socket, for engaging the
bit, and a clip on the socket, for engaging and moving the key, substantially as
shown and described.
Dated this 28th day of June 1898
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.