Improvements in Dust Arresters for Use with Mining Drills and .. Reamers..
Year: 1895

page_text: Date of Application, 12th Nov., 1395-Accepted, 14th Dec., 1895
COMPLETE SPECIFICATION.
T
Improvements in Dust Arresters for Use with Mining Drills and
.. Reamers..
Wé; ROBERT HABERSHAM ELLIOTT, of corner of 13th Avenue and
21st Street, South Highlands,, Birmingham, Alabama, United States of America,
Civil Engineer, and JOHN BRUCE CARRINGTON, of the Village of Jasper,
Walker County, Alabama, United States of America, Civil Engineer, 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 :-
This invention relates to dust accumulators or arresters for use in drilling
and reaming bore holes ia mining coal, or other like soft or, dust, yielding,
minerals.
1
'
In coal mining, especially, the boring tool: makes a great deal of dust,, and
where this dust is removed from the bore hole by. means of an air blast, passing}
through the hollow stem of the drill or reamer: which returns dust,laden through
the bore hole, this dust becomes especially objectionable to the operatives, in, the
mine.
It is to avoid this objection, that the hereinafter described device, was
provided.
This device consists essentially of a hood in the form of a sack or pouch.or.
hollow truncated cone, and has its mouth opening over the mouth of the bore hole,
against, which it is held by suitable means, while the drill or reamer spindle
continues to revolve.
The said invention also consists in certain novel details of construction and
arrangements of parts which will be hereinafter more fully described and claimed..
Reference is bad to the accompanying drawings in which the same parts are
indicated by the same letters throughout the several views..
DESCRIPTION OF THE DRAWINGS.
Fig. 1 represents a vertical section through the bore hole showing a mining drill
in operation, and the dust arrester mounted thereon.
Fig. 2 represents a similar view shewing a reamer in operation with the dust
arrester mounted thereon.
Fig 3 represents a side elevation of the frame, for keeping the mouth of the
dust sack extended, and for supporting the same on the reamer spindle or drill
spindle.
'Fig. 4' represents an end view of the device! shewn in Fig. 3, as seen from the
right of the said figure, but with the fringe detached from the frame.
Fig. 5 is a similar view to that shewn in Fig. 4, except that the frame is.uuhooked
and detached from the spindle...
14
Fig. 6 represents a side elevation of the collar used to press the frame shewn in
Figs. 3, 4 and 5, towards the mouth of the bore hole.
Fig. 7 represents an end view. of the device shewn in Fig. 6, and as seen from.
the right of the said figure, except that the holding loop is turned down in the
holding position.
***
PV
F
... 1
.
Fio & represents a plan view of the device shewn in Fig. 7, and]
: :

page_text: Fig. 9 represents another method of connecting the collar to the frame for the
head of the dust sack, whereby the said frame may be kept pressed over the mouth
of the bore hole.
Fig. 10 represents a vertical section through the bore hole, shewing a combined
mining drill and reamer in operation and a modified form of dust arrester mounted
on the drill spindle, and in operative position, and
Fig. 11 represents the means of connecting the dust collecting cone shown in
Fig. 10 to the engine frame, whereby said cone is held in the desired position.
A represents a drill spindle which is provided with a feed screw a, operated in
the ordinary way, and terminates in the drill steel B
A represents a reamer spindle, provided with cutting blades B', and centering
device B³.
The devices for rotating the drill or reamer spindle, and for blowing air therc-
through are not a part of the present invention, and are not shewn in the
drawings.
Grepresents a sack or pouch, which may be either closed at the bottom, and
made of perforate material, or of imperforate material, open at the bottom, or of
any suitable material.
The upper portion of the sack G, is secured to a frame C, which is preferably
faced with a fringe D; of bristles, wire, cloth, or the like, which fringe is pressed
close against the edges of the bore holc, and serves to, in a large measure prevent
the escape of dust laterally.
This frame C with its fringe Dare pressed towards the mouth of the bore hole
intany convenient way, such as by the mechanism shewn in Figs. 3, 6 and 9. Thus,
the frame C, is made of two semi-circular ribs e pivoted together as atic, and
hooked together at the opposite end as by means of the hooks and c³, shewn most.
clearly in Figs. 4 and 5.
These ribs are connected to the two parts of the sleeve C which encloses
the drill or reamer spindle, by means of the curved ribs e³, and the braces c', shewn
most clearly in Figs: 3 and 9. The two parts c form a sleeve C which fits loosely
around the drill or reamer spindle, and which sleeve is pressed forwards by the
springs F shewn in Figs. 1, 2, 3, 6, 7, and 8, or by the spring F shewn in Fig. 9.
The springs
are attached to the front face of a collar or ring E, which is
made of two parts hinged together as at e, and provided with opposite lugs e', to
one of which the loop E³ is pivoted, which loop slips over,the opposite lug, and thus
holds the two parts of the ring together.
The ring E is lined throughout most of its inner surface with the pads E of
rubber or leather which enable the ring to hold firmly on the reamer spindle, or to
engage in the screwthreads. on the drill spindle.
In the form of device shewn in Fig. 9, F' represents a coil spring, which encloses
the spindle A¹ and bears at one end on the ring E, and at the other end on a
second ring E, which is conhected by balls or anti-friction rollers e with the back
of the sleeve C³:
".
Where the dust arrester is used with reamer spindles as shewn in Figs. 2, 3.
and 9, the ring or collar E is clamped in a fixed position on the reamer spindle,
and the springs F; or F', press the frame C towards the mouth of the bore
hole, and keep the fringe D. close against the edges thereof.
Where the device is used on a drill spindle, the same motion of the drill spindle
which causes the same to feed forward will also tend to carry the ring E forwards,
but this will be resisted by the frame C, and the drill spindle will turn in the
collar. E, and thus the mouth of the dust sack will be kept pressed against the
mouth of the bore hole.
'
The operation of the device will be understood by an inspection of the drawings.
The dust blown backwards out of the bore hole is arrested either by the fringe+D
or by the sack G, and the air escapes either through the fringe or through the
interstices in the side of the sack or through the open bottom of the sack, leaving
the great mass of dust behind in the sack,
w
7

page_text: Referring now to Figures 10 and 11 :—
X represents the seam of coal or other mineral being mined which is represented:
as having been bored through as at a, and reamed out somewhat as at !, by the
anger: W, and reamer blades V., respectively.
.
These reamer blades' are extensibly mounted in the reamer head V¹, to which
the auger W is revolubly connected in any convenient way.
The hereindescribed dust arrester may be used with any form of boring or,
reaming tool, and-those shewn in Fig. 10 are intended, to be merely typical.
The drill spindle A which is screwthreaded and fed in the usual way is driven
by the gear wheel L and pinion M from the engine K mounted between the jack-
posts N, to which the extensions k in the engine frame or bed plate are secured in
any convenient way.
The drill is fed by means of the double arms P pivoted to the machine frame
and clamped together, when in operation, by means of the. clamp screws pl.
These arms carry two half nuts p which engage with the screwthreads on the
drill spindle.
The engine frame is connected by rods R with a ring S, hinged as at s, and
secured as at s¹, opposite said hinge, which ring may be provided with spring SI
pressing against the base of the cone T, which is also hinged, and secured as at t
opposite said hinge whereby the said cone may be readily put on to the drill
spindle or taken off when desired.
The face of the cone is provided with a fringe t' of wire or hair bristles set on
end, and adapted to enter into the inequalities in the face of the seam, and so
cause the base of the cone to fit snugly against the mineral around the bore hole.
This wire serves as a screen to prevent the passage of the larger particles of dust,
and soon becomes so choked up with solid particles as to be practically air tight.
The lower portion of the cone is provided with an orifice t to which the hose T
is connected, which hoso leads to a vessel U which is preferably partly filled with
water, or said hose may be lead to any desired receptacle, or to any position where
the dust may be blown through without inconvenience to the operatives.
While it is preferable to blow the dust into water it may be collected in a dry
state by placing a wire screen over the top of the receptacle U.
It will be obvious that various modifications of the hereindescribed apparatus
might be made which could be used without departing from the spirit of the
invention.
Having thus particularly ascertained and described the nature of our said
invention, we declare that what we claim is:
1. The construction and arrangement of parts hereindescribed and shewn in
Figs. 1 and 2 of the drawings hereunto annexed.
2. The construction and arrangements of parts hereindescribed and shewn in
Figs. 3 to 9 of the drawings hereunto annexed.
3. The construction and arrangement of parts hereindescribed, and shewn in
Fig. 10 of the drawings hereunto annexed.
4. In a device of the character described, the combination with a drill or reamer
spindle, and a frame loosely enclosing the same and of greater diameter than the
mouth of the bore hole, and a fringe on the face of said frame enclosing the mouth
of the bore hole, of a sack secured to said frame and opening downwards therefrom,
and means for pressing said frame towards the mouth of the bore hole, substantially
as described.
5. In a device of the character described, the combination with a drill or reamer
spindle, of a frame loosely enclosing the same and of greater diameter than the
mouth of the bore hole, and a fringe on the front edge of said frame, substantially
as described.
6. A dust arrester for use in drilling or reaming bore holes which comprises a
hollow truncated cone loosely. mounted on the drill spindle and fitting snugly
against the face of the mineral about the bore hole, aud an orifice for the

page_text: escape of the dust from the lower portion of said cone, substantially; as
described.'
7. A dust arrester for use in drilling, or reaming bore holes, which comprises.
a.hollow truncated cone loosely mounted on tho, drill spindle, and provided with a
fringe on the face of the base thereof, adapted to fit snugly against the face of the
mineral about the bore hole, means for holding the said cone, in position against
the said mineral, and an orifice for the escape of the dust. from. the, lower portion.
of said cone, substantially a as described..
Dated this 11th day of November 1895..
G. J. CLARKSON;
Chartered Patent Agent, Stockton-on-Tees, Agent for the Applicants.