Improvements in Apparatus for Drilling Rock, Stone, and the like.
Year: 1896

page_text: Date of Application, 17th Jan., 1896
Complete Specification Left, 11th Sept., 1896-Accepted, 17th Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Drilling Rock, Stone, and
the like.
I, EDWIN JOHNSON BALDWIN of Cardiff, County Roane, Tennessee, U.S.A.,
Store Manager, do hereby declare the nature of this invention to be as
follows:-
In this invention a rock, stone or the like drill is carried in a removable chuck
fixed on a spindle like extension of a long screw which works in a screw nut
carried in the front end of a correspondingly long socket or tube, the latter being
mounted to slide along an open and preferably rectangular frame resting upon a
main frame. Upon the spindle like extension just behind the drill chuck is fixed
a wheel having ratchet teeth radiating from the centre to the circumference of
the same. This ratchet wheel is rotated and with it, the screw and drill rotated
and advanced, by means of a wheel having in its periphery cavities in which are
fitted spring teeth bevelled on one edge and vertical or straight on the other edge.
This spring toothed wheel is carried on a spindle capable of rotation in the
front end of the rectangular frame, so as when turned by means of a lever in
one direction, to operate the drill through the ratchet wheel and screw, and in
the reverse direction to slide with its spring teeth against said ratchet wheel
without turning it.
Dated this 17th day of January 1896.
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C., Agent for the Applicant.
Improvements in Apparatus for Drilling Rock, Stone, and
the like.
1, EDWIN JOHNSON BALDWIN of Cardiff, County Roane, Tennessee, U.S.A.,
Store Manager, 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:-
The apparatus of this invention is shewn in the accompanying drawing in
which
Fig. 1 is a front elevation thereof with the bit or drill ready for operating on
rock or like substance.
Fig. 2 is a sectional plan of the same after the bit has penetrated its full
length.
Figs. 3, 4 and 5 are enlarged views of details.
F is a frame of any approved material and construction such as iron tubing,
having at its outer end a head F¹ and at its inner end a footf connecting the
top and bottom bars of the frame and having a central and preferably square
aperture between them.
T is a long and preferably square tube capable of sliding through said aperture
in the foot. and carrying near its rear end a rest R' adapted to rest against 'the'
[Priced

page_text: drill frame (not shown) or some other suitable support. Near the forward end of
this tube are guide lugs L projecting above and below and either having forks (
at their outer ends sliding along the bars of the frame, as shown, or entering slots
in said bars, as will be clear, their purpose being to hold the forward end of the
tube centrally between such hars at all times and yet permit it to move longi-
tudinally therein.
N is a nut removably secured in the open front end of the tube by a set screw n,
and S is a long screw taking through this nut and extending within the body of
the tube the forward end of the screw being journalled through the head Fas
seen in Fig. 2 and carrying a drill chuck B for the removable reception of the
drill point or bit B as will be clearly understood. Thus when the screw is turned
in.the proper direction it will be seen that it will be drawn out of the nut and
tube, and will force the entire frame and bit away from the tube and the support
against which the latter rests, while at the same time turning the bit as the latter
progresses forward,
Secured fast on the screw S just in rear of the clamp or clutch B¹ is a wheel G
(best seen in Figs. 3 and 4) whose edges are milled as at G', whose rear face is
provided with a number of radial ratchet grooves g with one vertical wall and the
other inclined as shewn and whose front face is provided with a number of
forwardly projecting square lugs g.
R is a wheel mounted in an opening in the head F1 and fixed on its shaft C
which latter is square at its front end for the reception of a crank handle Cas
will be clear. This wheel is provided (Figs. 3 and 5) with a number of radial
openings in its periphery as seen at Reach forming a cavity within which is
seated an expansive spring R, and around the periphery of the wheel is secured
a band or tire R having openings R smaller in diameter than said cavities but
concentric therewith.
r is a tooth seated in each cavity and having a bevelled outer end r', its inner
end having an enlarged head, of the size of the cavity while its body is of the
size of the opening R' in the tire. Although I have described and shewn this
means for foreing the teeth normally outward, yet preventing their complete
displacement, any other suitable means may be employed it being only necessary-
that the flat faces of the teeth shall contact with the vertical walls of the grooves y
whereby the wheel G (and with it the screw aud bit) is turned forward when the
crank is turned to the right, and will not be moved when the crank is turned
to the left or reversed, since the teeth will then yield and the springs be compressed
within the openings R².
In operation the parts are first arranged as seen in Fig. 1 and a bit inserted
which is of the proper diameter and with a pitch to its threads greater than that
of the screw S and a suitable support is brought to bear against the rest R. The
crank C is then turned to the right by the operator who stands alongside the
frame, and this movement turus the toothed wheel R so that its teeth engage i
the grooves in wheel G while the rotation of this wheel turns the bit and screw.
As the point of the bit forms a hole in the face of the rock the screw slowly.
draws out of the nut N and tube T, pushing the frame forward on said tube and
feeding the bit to the rock as the hole therein is formed. Since the bit rotates
faster than it advances the borings will be wormed out of the hole as it is formed
and will not choke or stop the movement of the bit. When the bit is sunk for
nearly its complete length it will be obvious that the crank C will strike the
rock and cannot longer make complete revolutions and then it is that the spring,
pressed teeth become useful, because after turning the crank half a revolution
it can be turned back for a new bite and its teeth r will slip over the grooves g,
as is clear. When the frame has been advanced as far as possible in this way,
the crank handle is removed from the square end of the shaft C¹ and placed ou
one of the lugs g' in which position it is used to start the grooved wheel G, bit B,
and screw S backward. As soon as the point of the bit has been drawn out of
the accumulated borings the crank is removed and the wheel rapidly rotated

page_text: to the rear by its millings G and this movement very quickly runs the screw
back into the tube and withdraws the bit from the hole in the rock, or if preferred,
after the bit has been loosened the set screw n is withdrawn and the screw S
turned until the nut N is cleared of the forward end of the tube after which this
nut can be quickly run back on the screw and the tube shoved back to it; initial
position, the nut inserted and the set screw replaced. Thereafter a longer bit is
substituted for the one first used, inserted in the hole, the rest again placed against
a support, and the boring continued for a greater depth. In this way a hole of
the desired depth can be made in far less time than with drills now generally in
use, the saving of time occurring in the speed with which the parts may be
returned to their initial position.
Moreover, the use of spring pressed teeth instead of the usual bevel gearing
between the power wheel and the drill permits the latter to be turned until the
head F is almost against the rock, and this will be found to greatly enhance the
value of the machine by increasing its boring capacity in cramped places.
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 rock stone and the like drilling apparatus the combination with a frame
having a head and foot connected hy side bars, said foot having a square central
aperture, a square tube sliding through said aperture, guide lugs near its forward
end sliding on said bars, a rest at its rear end, a nut in its front end, and a set
screw holding the nut removably in place; of a shaft journalled through said
head and having a threaded rear end passing through the nut into said tube, a bit
chuck carried by its front end, and means for rotating the shaft in either direction,
substantially as described and shewn.
2. In an apparatus of the kind referred to, the combination with a frame having
a head, a tube sliding longitudinally within the frame, a nut in its forward end,
and a support for the rear end thereof; of a shaft journalled through said head
and having a threaded rear end passing through the nut into said tube, a bit
chuck carried by its front end, a wheel fast on the shaft and having milled edges,
lugs projecting from the front face of this wheel, a handle removably engaging
any of said lugs, and means for turning said wheel forward mechanically,
substantially as described and shewn.
3. In an apparatus of the kind referred to, the combination with a nut, means
for supporting it, a screw taking therethrough, a bit carried by the screw and a
wheel also carried by the screw and having grooves in its face; of a power wheel
at right angles to the grooved wheel, a crank therefor, and spring actuated teeth
in its edge adapted to engage said grooves on the forward turning of the crank
only, substantially as described and shewn.
4. In an apparatus of the kind referred to, the combination with a nut, means for
supporting it, a screw taking therethrough, a bit carried by a screw and a wheel
having a milled edge also carried by the screw, and provided in its rear face with
radial ratchet grooves and on its front face with lugs; of a power wheel having
a square shaft, a crank handle adapted to fit said square shaft or the lugs in the
grooved wheel, and spring actuated teeth in the power wheel adapted to engage
said grocves only on the forward turning of the crank, substantially as described
and shewn.
5. The general arrangement and combination of parts constituting the apparatus
referred to, substantially as described and shewn."
ديد
1.
1000
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C., Agent for the Applicant.