Improvements in Quarry Bars.
Year: 1893

page_text: Date of Application, 11th Feb., 1893
Complete Specification Left, 11th Nov., 1893-Accepted, 16th Dec., 1893
TRUYIDIONAL DIMITTUALION.
Improvements in Quarry Bars.
We, ALBERT WILLIAMS DAW, and ZACHARIAS WILLIAMS Daw, both of
Mansion House Chambers, 11 Queen Victoria Street, in the City of London,
Mining Engineers, do hereby declare the nature of this invention to be as
follows:-
This invention relates to various improvements in what are known as "quarry
bars" for carrying rock drills.
The bar proper consists of a girder preferably of H section, which may be of
any desired length, and is carried by suitable frames or legs to be hereinafter
described, and which support the bar at any desired height above the surface upon
which the rock drill is to operate. The bar is provided with a toothed rack
running the whole of its length and secured to or formed upon the inner surface of
the top or bottom flange on one side of the central web. A saddle or frame is
mounted on the bar so that it can slide from end to end thereof, such saddle or
frame carrying a spindle on the inner end of which is mounted a pinion gearing
with the toothed rack or bar, while its outer end is fitted with a crank handle by
which such pinion is actuated. By these means the saddle can be readily moved to
any desired position along the bar in either direction. The cradle of the rock drill
is mounted on the sliding saddle, being either directly secured thereto or mounted
upon a horizontal shaft projecting therefrom and round which it can swivel or turn,
suitable means being provided in the latter case to clamp the drill in any position
on the horizontal shaft to which it may have been turned. The drill will thus be
carried along with the saddle when same is shifted along the bar, and when it has
arrived at the desired position the saddle can be clamped on such bar. For this
purpose a groove or way is formed in the saddle and in this is fitted a bolt one end of
which projects outside the saddle, where it is fitted with a nut, while the other end
of the bolt is formed with a head, the inner surface of which bears on the upper
surface of the quarry bar, while the outer surface of such head is inclined and
works against a correspondingly inclined surface in the groove or way in which it
is situated. By tightening the nut on the outer end of the bolt, the head of the
latter is caused to travel down the incline of the guide or way so that its under
surface binds on the quarry bar, and thus firmly secures the saddle (and conse-
quently the drill it carries) to such bar. By loosening the nut of the bolt and
forcing the latter slightly back in its guide or way, the saddle will be released from
the quarry bar and can be shifted along same to any desired position by turning
the crank handle which actuates the pinion gearing with the rack of the bar.
For the purpose of enabling the bar itself, and also the saddle mounted thereon,
to be turned in the legs or frames which support it, so as to permit of the drill
being fixed to work horizontally or at any desired angle, such bar passes through a
sleeve, which can be clamped to the bar by means of a bolt with an inclined
surface, and acting in the same manner as the bolt which serves to fix the saddle
on such bar, as above described. This sleeve works in a bearing carried by the
frame or legs, so that it can be turned therein and carry the bar with it, and by
tightening the cap of such bearing the sleeve (and with it the bar) will be clamped
in the position to which it has been turned. A similar bearing is provided at or
near each end of the bar, and it will be seen that by releasing the sleeve from the
bar (by slackening the bolt with the inclined head) the sleeve, and with it the legs
or frame carrying the bearing, can be shifted to any desired position along the bar.
Further, when the drill is required to work as near to the end of the bar as possible,

page_text: one of the frames can be first slipped off the bar, and the saddle and drill then also
removed therefrom, after which the frame is replaced on the bar and clamped at a
sufficient distance from the end thereof to enable the saddle carrying the drill to be
placed on the bar outside such frame. Each of the end bearings of the quarry
bar is supported by legs, each of such legs passing through an eye formed on one
end of a bolt, which extends through a socket having an external conical surface
engaging a corresponding seat formed in the frame of the bearing, such bolt
extending through the frame and being provided with a nut to tighten up the bolt.
The outer end of the conical socket above referred to is cut away or recessed, so
that the leg passing through the eye of the bolt which extends through such socket
will fit into such recess, which is formed at the angle it is desired to give the leg in
relation to the bearing.
The outer side of the inner surface of the eye of the bolt is also formed at a
corresponding angle, so that when the bolt is tightened up the leg will be bound
tightly between the inclined surface of the recess in the socket on one side, and the
inclined surface of the eye of the bolt on its opposite side, while at the same time
the tightening of the bolt will also force the conical socket firmly into its sent, so
as to bind same there and prevent it turning therein. The loosening of the bolt
will release the leg and thus enable the bearing and consequently the quarry bar to be
adjusted vertically to any desired height on the legs. The loosening of the bolt
also releases the conical sleeve from its seat in the bearing frame, and permits it to
be turned therein, carrying the leg with it, thus enabling the distance between the
legs at the opposite ends of the bearing frame to be adjusted at will, thus increasing
or diminishing the base of the stand as desired.
Each of the legs of the stand may if necessary be fitted with weights so as to
increase the stability of the stand.
The legs of each stand normally incline outwards, but their lower ends are bent
so that same are approximately vertical. Over the lower end of each leg a sleeve
is slipped, a shoulder formed on the leg abutting against the bottom of the sleeve,
through which it passes so that the end of the leg rests in contact with the ground.
A collar or washer is keyed on the leg below the sleeve so as to secure the latter in
position, while leaving it free to turn round the leg. A shoe or casting fits over
the bottom of the sleeve, to the lower end of which it is pivotted. At one end of
the shoe a roller or wheel is mounted, while its opposite end is formed with a hole
or recess to receive a "tommy" or lever, for the purpose to be presently described.
Towards the upper end the shoe is formed with an opening, which when the shoe
is turned on its pivot so that the roller at one end is raised clear of the ground, is
in such a position that a pin can be passed through it and will bear against the outer
surface of the sleeve mounted on the leg, thus securing the shoe and its roller in
the raised position. By removing the pin the shoe will be free to turn on its pivot
until the roller it carries bears on the ground, and by then inserting a "tommy ог
lever in the hole or recess before referred to, and forcing same upwards, the roller
will be forced against the ground, thereby raising the leg from contact with the
latter. This action brings another opening in the shoe below the bottom of the
sleeve, and by inserting the pin therein the shoe will be fixed firmly in its lowered
position, so that the weight of the frame, quarry bar and drill will rest on the
roller. Each of the legs is similarly treated, whereby the whole weight will be
supported on a set of rollers free to turn (with the sleeves described) round the legs
on which they are mounted, so that the apparatus may be shifted bodily with ease
to any required position.
Dated thin 10th 1
1000
"
ALLISON BROS.,
Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Quarry Bars.
We, ALBERT WILLIAMS DAW, and ZACHARIAS WILLIAMS DAW, both of
Mansion House Chambers, 11 Queen Victoria Street, in the City of London,
Mining Engineers, 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 :-
" quarry
This invention relates to various improvements in what are known as
bars" for carrying rock drills, such improvements being illustrated in the
accompanying drawings, in which

page_text: saddle D can then be caused to travel along such bar to any desired position (by
actuating the pinion e gearing with rack C), when it can be again clamped thereto
in the manner above described.
For the purpose of enabling the bar A itself, and also the saddle D mounted
thereon, to be turned in the frames carrying the legs B which support it, so as to
permit of the drill being fixed to work horizontally or at any desired angle, such
bar A (as shown in detail in Figs. 3, 4 and 5) passes through a sleeve J, which can
be clamped to the bar A by the means hereinafter described. This sleeve J works
in a bearing K carried by the frame L in which the legs B are mounted, so that it
can be turned therein and carry the bar A with it, and by tightening the cap k of
such bearing the sleeve J (and with it the bar A) will be clamped in the position
to which it has been turned.
It will be seen in Fig. 1 that two frames L, each carrying supporting legs B, are
provided, and each of these frames is constructed in the manner above described,
the quarry bar A being supported therein by means of_the_sleeve J carried by the
bar and mounted in the bearing K of such frame L. In order to enable the
frames and consequently the legs B to be adjusted along bar A, the sleeve J is
provided with suitable means for releasing same therefrom when desired.
For this purpose (as shown in Figs. 3, 4 and 5), a groove or way j is formed in
the sleeve J, and in this is fitted a bolt M, one end of which projects outside the
sleeve, where it is fitted with a nut m, while the other end of the bolt is formed
with a head m', the inner surface of which bears on the upper surface of the quarry
bar A, while the outer surface of such head is inclined and works against a corre-
spondingly inclined surface in the groove or way in which it is situated. By
tightening the nut m on the outer end of the bolt M, the head m¹ of the latter is
caused to travel down the incline of the guide or way j so that its under surface
binds on the quarry bar A, and thus firmly secures the sleeve J to such bar. By
loosening the nut m of the bolt M, and forcing the latter slightly back in its guide or
way, the sleeve J will be released from the quarry bar A, and can be shifted along
same to any desired position, carrying the frame L and legs B with it, when the
sleeve J is again clamped to the bar by tightening nut m. Further, when the drill
is required to work as near to the end of the bar A as possible, one of the frames L
can be first slipped off the bar, and the saddle D and drill then also removed
therefrom, after which the frame L is replaced on the bar A and clamped at a
sufficient distance from the end thereof to enable the saddle D carrying the drill to
be placed on the bar A outside such frame L.
Each of the frames L is supported by legs B, each of such legs (as shown in
detail in Figs. 3, 4, 5 and 10) passing through an eye N formed. on one end of a
bolt O, which extends through a socket P, having an external conical surface
engaging a corresponding seat Q formed in the frame L, such bolt O extending
through the frame L and being provided with a nut to tighten up the bolt. The
outer end of the conical socket.P is cut away or recessed (as shown at p, in Figs. 4,
5 and 10), so that the leg B passing through the eye N of the bolt O, which
extends through such socket, will fit into such recess, which is formed at the angle
it is desired to give the leg in relation to the frame L. The outer side o of the
inner surface of the eye N of the bolt O is also formed at a corresponding angle,
so that when the bolt is tightened up the leg B will be bound tightly between the
inclined surface of the recess p in the socket P on one side, and the inclined surface
of the eye N of the bolt O on its opposite side, while at the same time the tightening
of the bolt will also force the conical socket firmly into its seat Q, so as to bind
same there and prevent it turning therein. The loosening of the bolt O will
release the leg B, and thus enable the frame L, and consequently the quarry bar A,
to be adjusted vertically to any desired height on the legs. The loosening of the
bolt also releases the conical socket P from its seat Q in the frame L, and
permits it to be turned therein, carrying the leg B with it, thus enabling the
distance between the legs at the opposite ends of the frame L to be adjusted at
will, thereby increasing or diminishing the base of the stand as desired.

page_text: Each of the legs B of the frame L may if necessary be fitted with weights so as
to increase the stability of the whole.
The legs B of each frame L, (as shown in Figs. 2 and 11), incline outwards, but
their lower ends are bent so that same are approximately vertical. Over the lower
end of each leg B a sleeve R is slipped, a shoulder & formed on the leg abutting
against the bottom of the sleeve, through which it passes so that the end of the leg
normally rests in contact with the ground. A collar or washer S is keyed on the
leg B below the sleeve R so as to secure the latter in position, while leaving it free
to turn round the leg. A shoe or casting T fits over the bottom of the sleeve R,
to the lower end of which it is pivotted at r. At one end of the shoe T a roller or
wheel is mounted, while its opposite end is formed with a hole or recess t¹ to
receive a "
"
tommy or lever, for the purpose to be presently described. Towards
the upper end the shoe T is formed with an opening, which, when the shoe is turned
on its pivot so that the roller t at one end is raised clear of the ground, is in such
a position that a pin U can be passed through it and will bear against the outer
surface of the sleeve R mounted on the leg B, thus securing the shoe T and its
roller in the raised position (as shown in full lines in Figs. 2 and 11). By
removing the pin U the shoe T will be free to turn on its pivot until the roller
it carries bears on the ground, and by then inserting a
" tommy or lever in the
hole or recess t¹, and forcing same upwards, the roller t will be forced against the
ground, thereby raising the leg B from contact with the latter (as shown in dotted
lines in Fig. 11). This action brings another opening V in the shoe T below the
bottom of the sleeve R, (as shown in dotted lines in Fig. 11), and by inserting the
pin U therein the shoe T will be fixed firmly in its lowered position, so that
the weight of the frame L, quarry bar A, and drill, will rest on the roller t.
of the legs B is similarly treated, whereby the whole of the weight will be supported
on a set of rollers & free to turn (with the sleeve R), round the legs B on which
they are mounted, so that the apparatus may be shifted bodily with ease to any
required position.
"
Each
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is:-
1. The improved support for quarry bars, consisting in a sleeve through which
the bar passes, and which is provided with suitable means for clamping it thereon
in any position to which it may have been shifted, such sleeve being mounted in a
bearing formed in a frame to which the legs for supporting the bar are secured, in
such a way that the sleeve, and consequently the bar, may be caused to turn in the
bearing, in combination with means for clamping the sleeve in the position to which
it has been turned in such bearing, all substantially as specified.
2. The means for adjustably securing each of the legs for supporting quarry bars
to the frames through which such bars pass, consisting in a bolt with an eye at one
end and means for clamping the bolt to the frame at the other end, such bolt passing
through a socket with a conical outer surface fitting a corresponding seat in the
frame, and the leg passing through the eye of the bolt, which, as well as the
socket, is formed so that such leg will be clamped between it and the socket when
the bolt is tightened, while at the same time the socket is clamped in its seat in the
frame, all substantially as and for the purposes specified.
3. The means for raising the legs supporting quarry bars clear of the ground,
so as to permit of the whole apparatus being easily shifted bodily from one position
to another, such means consisting in a sleeve mounted on the lower end of each leg
so that same can rotate freely round the latter, a shoe or casting being pivotted to
the sleeve and carrying a roller or wheel at one end and means for turning the
shoe vertically on its pivot at the other end, so as to force the roller down in
contact with the ground, and thus raise the leg clear thereof and enable the quarry
bar to be readily wheeled along on the rollers, the whole in combination with

page_text: suitable holes in the shoe or casting to receive a pin, whereby such shoe or casting
can be fixed in either its raised or lowered position, all substantially as specified.
Dated this 30th day of October 1893.
ALLISON BROS.,
Agents for the Applicants.