A New or Improved Hand Drilling Machine for Coal and the like.
Year: 1891

page_text: Date of Application, 4th Nov., 1891
Complete Specification Left, 23rd Jan., 1892-Accepted, 27th Feb., 1892
PROVISIONAL SPECIFICATION.
A New or Improved Hand Drilling Machine for Coal and the like.
I, WILLIAM DAVID LEWIS of 3 Beach Villas, Graigwen Road, Pontypridd, in
the County of Glamorgan, South Wales, Blacksmith, do hereby declare the nature
of this invention to be as follows:-
My invention relates to a new or improved hand machine for drilling hard
substances, such for instance as anthracite or bituminous coal and the like, the
object of which is that by its portability lightness, and small dimensions it is
capable of being employed in small or narrow spaces where other machines for a
like purpose cannot be used. The apparatus consists of a few parts, easily fixed
where needed, can be worked or driven by a boy, is capable of boring at any angle
and in any position, a distance of several feet, without the need of props or stays to
maintain its rigidity and stability.
In carrying my invention into effect I construct of any suitable metal a pair of
jaws fulcrumed together by means of a cross strap or brace, bolted to each half.
The front extremities of said jaws are reduced in substance so as to be capable of
being inserted within a crack or crevice first made (if not existing) within the coal
or other substance to be drilled. Upon the outer face of said jaws are sharp pins
or teeth so that when the jaws are inserted within said crevice and opened, the pins
or teeth are forced into the substance, for retaining said jaws in position. The
halves of said jaws are of unequal length, the shorter or movable half of which is
fulcrumed to the longer or stationery half, at about mid-way of its length and is
formed with a ring or eye at the end farthest from the mouth, which coincides with
a similar eye in the longer or stationery half, through both of which is passed a
flat headed ring bolt, the threaded end of which carries a suitable nut. By
unscrewing said nut and separating the eye end of said jaws, the mouth ends are
closed, so that they may be inserted in the crevice or crack in the coal or other
substance. The nut on the ring bolt is then screwed down and closes the back ends
and expands the jaws within said crevice, when the before mentioned teeth enter
the substance of the coal or the like and the jaws are thereby held firmly in position.
The free end of the longest or stationery half of said jaws carries a table or frame
by means of a bolt and nut passing through a hole in the former and a slot in the
latter. Said table or frame is provided with hinged clamps one of which carries an
internally threaded duplex boss, through which passes an externally threaded shaft
and this when rotated is fed through said boss at a rate partially regulated by the
pitch of the thread thereon and partially by the speed of its rotation. The before
mentioned table or frame by means of the slot and bolt before referred to is capable
of being fixed upon the stationery jaw at any desired angle, but when so fixed that
the before mentioned threaded shaft is parallel with the jaws, the said threaded
shaft passes through an adjustable guide upon the top of a vertical standard bolted
to the back of the stationery jaw behind the fulcrum plate. One end of said
threaded shaft is provided with a stock into which the bit or boring tool is inserted.
Said threaded shaft is provided with two longitudinal grooves diametrically opposite
to each other, so that a bevel wheel having two studs or keys within its boss may
be mounted loosely thereon, between the hinged clamps of the table or frame before
mentioned, in such a manner that the studs or keys of the bevel wheel engages with
the grooves in the shaft. Said table or frame also carries a transverse shaft or
spindle in such a position that a small mitre wheel mounted thereon engages with
the mitre or bevel wheel upon the threaded shaft. One end of the transverse
spindle extends beyond the table or frame and carries an adjustable crank handle
the turning of which revolves the smaller mitre wheel, which in turn revolves the

page_text: .
larger mitre wheel, and thus by means of its internal keys revolves the threaded
shaft and its boring tool, and as said threaded shaft is revolved and the boring tool
is at work the latter is kept close up to the substance being bored by the feed of the
threaded screw shaft so that said boring may be extended to any distance equal to
the length of the said shaft. The free end of the threaded shaft may be finished
square for so much of its length as would be necessary to carry a duplicate crank
handle for a second operator if needed.
The apparatus may be provided with any number of duplicate threaded shafts
and duplex threaded bosses with threads of different pitch, so that if a very hard
substance is being bored a very fine thread may be used, and a coarser where a
softer substance is being operated upon, so that if the substance being bored turns
out to be harder than was contemplated and the feed of the screw shaft is in excess
of the cut, the coarser threaded shaft could be removed and a finer one replaced in
a few minutes without removing the apparatus from its fixed position within the
crevice as before described.
I may where needed provide junction pieces or unions so that two or more lengths
of threaded shafting may be united end to end for the purpose of extending the
length of said shafting when needed.
By this means I am enabled to bore any number of holes of indefinate lengths and
at different angles without removing the apparatus from it first fixed position, if
needed.
Dated this 3rd day of November 1891.
GEO. THOS. HYDE,
4, Little Moorfields, Fore Street, London, E.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
A New or Improved Hand Drilling Machine for Coal and the like.
I, WILLIAM DAVID LEWIS of 3 Beach Villas, Graigwen Road, Pontypridd, in
the County of Glamorgan, North Wales, Blacksmith, 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 or improved hand machine for drilling hard
substances, such for instance as anthracite, or bituminous coal and the like, the
object of which is that by its portability, lightness and small dimensions it is
capable of being employed in small or narrow spaces where other machines for a
like purpose cannot be used. The apparatus consists of few parts, easily fixed
where needed, can be worked or driven by a boy, is capable of boring at any angle
and in any position a distance of several feet without the need of props or stays to
maintain its rigidity or stability.
In order that my invention may be clearly understood I have appended a sheet of
drawings, in which
Fig. 1 is a plan view of the entire apparatus constituting my said invention and
Fig. 2 is a side elevation of the same.
Fig. 3 is a back, and Fig. 4 is a front elevation of the same apparatus.
Figs. 5, 6 and 7 are details to be hereinafter explained.
Fig. 8 is a plan view of the table top with the hinged clamps open or thrown back
to be hereinafter fully referred to.
Fig. 9 is a horizontal section of the table taken upon the line A B Fig. 2.
Fig. 10 is a plan view of the fore or mouth end of the jaws of the apparatus,
from which has been removed so much of the mechanism as obstructed the view of
same in Fig. 1.
Similar letters are employed to indicate the same parts throughout the drawings.
In carrying my invention into effect I construct of any suitable metal or metals a
pair of jaws A B, fulcrumed together by means of a cross strap and brace a, b,
bolted to each jaw. The front extremities of said jaws cd are reduced in substance

page_text: so as to be capable of being inserted within a crack or crevice first made (if not
already existing) within the coal or other substance to be drilled. Upon the outer
faces of c and d, are a suitable number of sharp pointed pins or teeth e, which
when c and d are inserted within said crack or crevice and forcibly opened, the
pins or teeth enter the substance on either side and retain the apparatus in
position.
The said jaws are of unequal length, the shorter or movable half B, being
fulcrumed to B at about midway of its length, and is bent or otherwise so formed
that when either end is in touch with A the opposite end is withdrawn therefrom.
The end of B farthest from d is provided with a ring or eye, and a similar eye g
is formed in the stationery jaw A, and through fand is passed a square or round
headed bolt h, upon which is screwed a nut i. By the unscrewing of the eyes f
and
are separated, which brings c and d together for insertion in the crack or
crevice aforesaid, when the screwing home of i is effected the teeth e as before
mentioned is forced into the coal or other substance and retains A and B in a
horizontal or other desired position without the need of stays or struts.
Ι
The end of the stationery jaw A farthest from the fulcrum carries a table or
platform C, the bottom or plate of which D (Fig. 9) is provided with a hole k and
a crescent shaped slot 1, and two circular holes coinciding with these is provided
in A, and through k and its companion hole in A is passed a bolt A provided with
a suitable nut kii, which is screwed thereon and may be loosened when required to
permit D to be moved in any direction surrounding . A similar bolt and nut l¹
aud passes through the slot and its companion hole in A, so that D may be set
at any angle within the limit of this being found sufficient for the useful working
of the apparatus, and when D has been placed at the angle required the tightening
of and retains it in that position. The upper surface of the table frame or
platform C, has hinged thereto two clamps E and F, in which are semicircular
recesses in and n, which when E and F are closed or shut down upon C coincide
with similar recesses o and p in C, and collectively form two circular apertures.
Within the aperture formed by n and p 1 place a duplex internally threaded boss,
consisting of two parts r and 8, provided with flanges and between which is
received the clamp E when this is shut down to hold the said boss in position as
shewn in Figs. 1, 2, and 3. The formation of said duplex boss will be better
understood by reference Fig. 5. The said boss carries an externally threaded
shaft G, provided with longitudinal grooves t and t¹ (shewn more particularly by
the enlarged sectional view Fig. 6) and upon the said shaft is mounted a mitre
wheel H, between E and F, provided with a boss H' which occupies the circular
space formed by m and o which acts as a bearing therefor. Upon the inner
periphery of H are two projections which engage with the grooves t t¹ in the
shaft G, so that while H is capable of rotating G, it can at the same time slide
thereon, or in other words G can slide therethrough. The table C also carries a
transverse shaft or spindle J, upon which is mounted a small mitre wheel K, in gear
with H. The said spindle J extends beyond C in one direction and carries an
adjustable crank or handle L, and in the opposite direction and carries a nut to
hold the same in position, and this end of J may be finished square for the reception
of a second handle. L if needed. The clamps E and F when closed may be so
retained by any suitable means but preferably by that of a pin M engaging with
suitable eyes upon C which pass through slots in E and F when these are closed as
shown in Figs. 1, 2, 3 and 4.
The foremost end of the threaded shaft G may have a stock N screwed thereon,
in which is inserted the bit or boring tool O, the opposite end of G is finished to
receive a handle L if needed.
The table or platform C may as before mentioned, be placed at any angle by
means of the slot i, which of course would place G in a like position, but when so
fixed that G is parallel with A, the shaft G passes through an adjustable vertical
guide P bolted to the stationery jaw A.
The jaws c d being rigidly fixed within a crack or crevice in the coal or other

page_text: substance to be bored in the manner before-described, the turning of the handle L,
would revolve the spindle J and mitre wheel K, which would rotate the mitre
wheel H, and thus by reason of the internal keys or projections v v¹ being in contact
with the keyways or grooves t and t¹ the shaft G would be rotated by H, as also
would be the boring tool O, and if the said rotation of G and H be in the direction
of the arrow in Fig. 3 the thread of G would be fed into the internal thread of the
duplex boss r. s, so that the boring tool O would be kept close up to its work in the
substance being bored, consequently the depth of said bore may be equal to
the length of G, and if this be insufficient for the purposes, the clamp E may be
raised and the half r of the duplex boss removed, when G and O may be slid back,
the stock N unscrewed, and a further length of shafting may by the means of a
suitable junction piece or union be connected to G, and the parts that have been
removed may be replaced and the boring proceeded with
The apparatus may be provided with any number of duplicate shafts G and
duplex bosses r. s, provided with threads of different pitches, so that if a very hard
substance is being bored a very fine thread may be used, and a coarser where a
softer substance is being operated upon. Or if the substance being bored turns out
to be harder than was contemplated and the feed of G is in excess of the cut, the
coarser threaded shaft could be removed, and replaced by a finer one in the manner
described when lengthening G, and this could be easily carried out without removal
of the apparatus from its fixed position.
By these means I am enabled to bore any number of holes of indefinite lengths
and at different angles, without removing the apparatus from its first fixed position.
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.
1st. The construction and use of the apparatus and mechanism herein described
and shown, and the several parts comprising the same, connected, combined, and
operating substantially as and for the purposes herein specified.
2nd. In a new or improved hand drilling machine the construction and use of
jaws A and B fulcrumed at and by means of plates a and b, and provided with pins
or teeth e, and bolt and nut hi for forcibly extending c. d. The construction and
use of a platform C, connected to A by a pivot bolt k', and provided with a
crescented slot and bolt . . The manner of mounting the threaded shaft G
within a threaded duplex boss r. s retained upon C, by a clamp E. The mitre
wheel H with boss H, and internal keys or projections vv engaging with slots t t¹
in G, and gearing with a mitre wheel K upon a transverse shaft J, carrying an
adjustable handle L. The clamp F, and the pin M, the guide P and socket N,
screwed upon G for carrying any suitable boring tool O, the whole connected,
combined and operating substantially as and for the purposes herein described and
shewn by the accompanying drawings.
Dated this 21st dow of Januar 1901
GEO. THOS. HYDE,
4, Moorfields, Fore Street, London, E.C., Agent for the Applicant.