Improvements in Appliances for Lifting and Turning Drills for Rock Boring and like Purposes.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Appliances for Lifting and Turning Drills for Rock
Boring and like Purposes.
I, CHARLES SIMMONS, of Great Dyke and Orizaba Cement Claims Co., Ltd.,
Kintore, Coolgardie, Western Australia, Civil Engineer, do hereby declare the
nature of this invention to be as follows:-
This invention, which relates to appliances for lifting and turning drills for
rock boring and like purposes, consists in improvements therein.
According to this invention, the body of the appliance consists of a cylinder, of
cast-iron, steel or other suitable metal, mounted on legs or on a frame or stand
on which the cylinder is adapted to swivel and on which it can be clamped.
Within the cylinder is a cup-shaped piston the lip of which is serrated or toothed
on the upper face. Annular grooves are formed in the external face or periphery
of the piston on each side of the teeth. At or about midway in the bottom of
the piston is an aperture for the boring tool around which aperture are situated
at intervals lugs set radially to the centre of the piston and extending upwards
from the inner face of the bottom of the piston. In these lugs are pivotted
gripper arms which at their outer ends are connected by wire clips to a coiled
cone-shaped spring the upper and smaller end of which presses against the
underside of a socket screwed into the upper end of the cylinder, the said socket
being capable, by adjustment, of regulating the initial pressure of the said
spring.
Projecting from the edge which constitutes the bottom of the cylinder are
lugs in which are pivotted crank levers carrying at the end of the outer limbs
a block or pad of wood, india-rubber, leather or other suitable material. The
other limbs of the cranked levers extend under the piston and carry anti-
friction rollers which bear against the outer face of the piston bottom. The
cranked levers are telescopic or extensible, and being fitted with set screws,
can be clamped at any required height to slides.
After the boring tool has been struck by a hammer, the block or pad of the
cranked lever is struck so as to depress it. This causes the cranked lever to tilt on
its pivot and apply an upward pressure to the piston, which is thus pushed up
in the cylinder. The coiled spring is, by this action, compressed, and the gripper
arms close upon and forcibly grip the boring tool which is thereby accordingly
lifted.
In lifting, the piston and drill are caused to turn through part of a circle
by the following means.
Formed in the wall of the cylinder is a spiral or curved slot and also a vertical
slot. In these slots are placed riders or pawls from the bodies of each of which
projects a movable catch which is shaped at its inner extremity so as to engage
with the teeth formed, as aforesaid, in the piston. On the outer side of each pawl
and attached to it, is a flat spring held in place by a stud and engaging with
the catch aforesaid which is grooved to receive it. Lugs projecting from the pawls

page_text: work in the annular grooves formed, as aforesaid, in the piston. Consequently,
when the piston is moved, the pawls travel in the slots in the cylinder in which
they are placed.
The piston, in rising in the cylinder under the influence of the blow received
upon the block or pad of the cranked levers, has also a rotatory motion con-
formably to the pitch of the spiral slot. This rotatory movement results from the
engagement of the catch of the pawl with the teeth of the piston. At the same
time the pawl in the vertical slot of the cylinder is raised by means of the lugs
working in the annular grooves whilst its catch is pressed outwards by the
moving teeth of the piston which slip or pass under the catch.
The pawl in the vertical slot prevents rotation of the piston when descending
during which movement the catch of the pawl in the spiral slot slips over certain
of the teeth of the piston. As the coiled spring rebounds in the descent of the
piston, the boring tool is carried back with it, there still being sufficient initial
force communicated to the grippers to ensure the boring tool being supported
even when boring upwards in the roof of a mine "level or drive," or in any
other position out of the perpendicular.
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101
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1000
NICHOLAS WATTS,
Chartered Patent Agent, Bristol.
Improvements in Appliances for Lifting and Turning Drills for Rock
Boring and like Purposes.
I, CHARLES SIMMONS, of The Great Cement Proprietary Ltd., (formerly
Great Dyke & Orizaba Cement Claims Co., Ltd.,) Kintore, Coolgardie, Western
Australia, 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, which relates to appliances for lifting and turning drills for
rock boring and like purposes, consists in improvements therein as below
described.
According to this invention, the body of the appliance consists of a cylindrical
casing of cast-iron, steel or other suitable metal, and provided with an eye
or sleeve and clamping serew by which the casing can be adjustably clamped
on a rod or other suitable carrier or stand. Within the cylinder is a cup-shaped
piston having annular grooves extending round its exterior. Between the grooves
and extending around the piston is a ring of bevelled teeth formed in the external
face or periphery of the piston and constituting a ratchet wheel. At or about
midway in the bottom of the piston is an aperture for the boring tool, around
which aperture are situated at intervals lugs set radially to the centre of the
piston and extending upwards from the inner face of the bottom of the piston. In
these lugs are pivotted gripper arms upon which bears the lowermost coil of a cone-
shaped spiral spring, the upper and smaller end of which is pressed upon by the under-
side of a socket screwed into the upper end of the cylindrical casing. This socket
is capable, by adjustment, of regulating the initial pressure of the spring.
Projecting downwards from the under face of the bottom of the cylinder are
lugs in which are pivotted cranked arms carrying an adjustable frame to which
is secured a block or pad of wood, india-rubber, leather, or other suitable material,
by striking which block or pad with a hammer, or the like, the drill-lifting and
turning mechanism is operated. The adjustable frame carrying the block or pad

page_text: can be clamped at any required height by means of set-screws. The other limbs
of the cranked arms extend under the piston and carry anti-friction rollers which
bear against the outer face of the piston bottom.
After the boring tool has been struck by a hammer, to penetrate the rock or
other substance being bored, the block or pad aforesaid is struck on the face.
This causes the cranked arms to tilt and apply an upward pressure to the piston,
which is thus pushed up in the cylinder. The coiled spring is, by this action,
compressed, and the gripper arms close upon and forcibly grip the boring tool
which is thereby accordingly lifted.
In lifting, the piston and drill are caused to turn through part of a circle by
the following means:
Provided in the wall of the cylinder is a spiral or curved slot and also a vertical
slot. In each of these slots is a rider or pawl, from the bodies of each of which
projects a movable catch which is bevelled so as to engage with the ratchet teeth
formed, as aforesaid, around the piston. On the outer side of each pawl, and
attached to it, is a flat spring held in place by a stud and pressing against the
catch aforesaid which is grooved to receive the spring. Lugs projecting inwards
from the pawls work in the annular grooves provided, as aforesaid, in the piston.
Consequently, when the piston is moved, the pawls are also moved in the slots
in the cylinder in which they are placed.
The piston, in rising in the cylindrical casing under the influence of the blow
struck upon the striking block or pad aforesaid, has also a rotatory motion con-
formably to the pitch of the spiral slot. This rotatory movement results from
the engagement of the catch of the pawl in the spiral slot with the teeth of the
piston. At the same time, the pawl in the vertical slot of the cylinder is raised
by means of the lugs working in the annular grooves of the piston, whilst its
catch is pressed outwards by the moving teeth of the piston which slip or pass
under the catch.
The pawl in the vertical slot prevents rotation of the piston when descending,
during which movement the catch of the pawl in the spiral slot slips over certain
of the teeth of the piston. As the coiled spring rebounds in the descent of the
piston, the boring tool is carried back with it, there still being sufficient initial
force communicated to the grippers to ensure support of the boring tool even
when boring upwards in the roof of a mine, "level," or "drive," or in any other
position.
Referring to the accompanying sheets of illustrative drawings, Fig. 1 represents
in elevation my improved drill-lifting and turning appliance. Fig. 2 is a
vertical sectional view, and Fig. 3 is a plan with the cover of the cylindrical
casing and part of the spiral spring removed.
The appliance consists of a cylindrical casing a of cast-iron, steel, or other
suitable metal. It is furnished with an eye or sleeve a¹ with a clamping screw
by which the casing can be clamped on a rod or other suitable carrier or stand.
Within the casing a is a cup-shaped piston 6 having annular grooves b' extending
round its exterior. Between the grooves and extending around the piston b
is a ring c of teeth constituting a ratchet wheel, the teeth being shaped like those
of a ratchet wheel, that is to say, bevelled. Centrally situated in the bottom of
the piston b is an aperture 62 through which the boring tool d is passed. Extend-
ing upwards from the inner face of the bottom of the piston bare lugs e in which
are pivotted the grippers f set radially to the centre of the piston b. Upon the
grippers bears the lower coil of a cone-shaped spiral spring g which is com-
pressed between the grippers f and the socket h screwed into the cover a² of
the casing a. By the socket h, adjustable in the cover a², the initial pressure
of the spring g is regulated.
Projecting downwards from the under face of the bottom of the casing a are
lugs in which is pivotted the spindle connecting the arms i which carry the
adjustable frame ; to which is secured the striking block, pad, or buffer j',
by striking which with a hammer, or the like, the drill-lifting and turning

page_text: mechanism of the appliance is operated. The frame can be clamped at any
required height on the arms by means of the clamping screws & passed through
the slots in the arms i, and the nuts k. The arms i extend below the piston b
and carry anti-friction rollers which bear against the outer face of the piston
bottom.
In practically using the appliance for boring or drilling, the boring tool or
drill is, after having been placed in the desired position, struck with a hammer,
or the like, to penetrate the rock or other material to be bored or drilled. Next
a blow is delivered on the block or pad j. This causes the cranked arms i
to tilt on the spindle s held in the lugs a³, and an upward thrust is thus imparted
to the piston 6 which is accordingly driven up sharply in the casing a.
spring g is in this way further compressed and the tool d becomes firmly gripped
by the grippers f and is thereby lifted.
The
In lifting, the piston b and tool d are caused to turn through part of a circle
about the centre of the piston by the following means:-
In the casing a is a vertical slot and also a diagonal or partly spiral slot m
which for convenience in description is hereinafter called the spiral slot. Placed
in the spiral slot m and suitably retained therein is a traveller or pawl n having
lugs n projecting into the annular grooves 61 of the piston b. A spring n
screwed on the pawl n bears upon the back of the movable catch o which by
this means is constantly pressed inwards against the piston b. The catch
is bevelled so as to fit it to engage with the ratchet rack c encircling the piston b.
An outside view of the pawl n is shown at Fig. 4, and an inside view at Fig. 5.
In the vertical slot in the casing a is a pawi 2 with lugs engaging with the
grooves b. The pawl has a movable bevelled catch y pressed upon at back by
the spring screwed on the pawl. A side view of the pawl 2 is shown at Fig. 6
and an inner face view at Fig. 7. Fig. 8 is an elevation of the piston b.
When the piston 6 moves, the pawls n and 2 move with it. As the piston b
rises under the blow delivered on to the striking block or pad j¹, as hereinabove
described, it also moves through a part of a circle about its centre conformably
to the pitch of the spiral slot. This rotatory movement results from the catch o
of the pawl being in gear with the teeth c, and so the piston bis dragged
around with the catch o. At the same time the catch g of the pawl P is
pressed outwards by the teeth c which slip or pass under the catch q.
In descending, the piston b is prevented from rotating backward by the
engagement of the catch q of the pawl p with the teeth c; and the catch o of
the pawl n slips or passes over certain of the teeth. The action of the catches
is reciprocal.
The tool d is carried down by the grippers f as the piston descends in the
rebound of the spring g.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what
I claim is:-
1. An appliance for lifting and turning drills for rock boring and like
purposes, arranged and operating, substantially as described.
2. An appliance for lifting and turning drills for rock boring and like
purposes wherein the drill carrier is mounted to move endways within a holder
against the action of a spring which effects its outward movement, and the holder
is provided with means substantially as described whereby the drill carrier with
drill will be partly rotated when moved inward but will be prevented from
rotating backward when moved outward.
3. A drill lifting and turning appliance wherein the drill carrier is mounted to
move endways within a holder against the action of a spring and is provided
with grip levers which are caused by the spring to grip and sustain the drill
and which, on the drill carrier being raised, increase their grip so that the
drill is lifted with the carrier and is returned with it, substantially as described.

page_text: 4. An appliance for lifting and turning drills for rock boring and like
purposes, comprising a cylinder formed with straight and spiral slots, a piston
that is arranged to move endways within the cylinder against the action of
a spring, is formed with an external ring of ratchet-like teeth and is provided
with spring-actuated levers adapted to grip and support a drill in position for
use, pawls adapted to be moved endways with the piston and provided with
spring catches engaging the teeth on the piston, one of the pawls being arranged
to work endways in the spiral slot and the other in the straight slot, and external
operating means whereby the piston can be forced inwards, the arrangement
being such that on the piston being forced inwards by the external operating means
the drill will be gripped more tightly and it and the piston will be partly rotated,
after which the piston will be moved outward by the spring without being rotated
backward and the grip on the drill will be relaxed, substantially as described.
5. A drill lifting and turning appliance constructed, arranged and operating
substantially as hereinbefore described with reference to the drawings annexed.
Dated this 11th day of September 1899.
NICHOLAS WATTS,
Chartered Patent Agent, Bristol.