Improvements in Drills for Mining, Quarrying, and other similar purposes.
Year: 1890

page_text: Date of Application, 24th Jan., 1890
Complete Specification Left, 24th Oct., 1890-Accepted, 13th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in Drills for Mining, Quarrying, and other similar
purposes.
I WILLIAM SETTLE of Darcy Lever near Bolton in the County of Lancaster
Assistant Mining Engineer do hereby declare the nature of this invention to be as
follows -
The object of my invention is to construct a simple and portable percussion drill
for boring or "holeing" in mines and for other purposes.
For this purpose I provide an electro-motor of suitable power upon the shaft of
which I fix a cam or tappet. Beneath this cam or tappet is a rod which slides in
a suitable casing and is provided with a projection against which the cam or tappet
acts.
A spring (or equivalent device) is applied to the sliding rod so that when the latter
is moved by the cam or tappet it will compress the said spring and upon the further
revolution of the cam or tappet the sliding rod will be released and carried back to its
original position, with violonce, by the said spring.
The end of the sliding rod may be sharpened or pointed so as to form a drill, or it
may be provided with a socket or other means for holding a removable drill.
The apparatus will thus work by percussion and will bore or cut coal rock, or other
substance with great rapidity.
In some cases the cam or tappet may be mounted upon the casing in which the
rod slides and the apparatus may be used as a hand tool, being driven by pulleys
or other suitable means from an electro motor which may be placed at any convenient
distance from the operator.
Dated this 23rd day of January 1890.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Drills for Mining, Quarrying, and other similar
purposes.
I WILLIAM SETTLE of Darcy Lever near Bolton in the County of Lancaster,
Assistant Mining 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 :-
The object of my invention is to construct a simple and portable percussion drill
for boring or holeing in mines and for other purposes.
The apparatus consists of an electro-motor of suitable power actuating a cam or
tappet wheel which works against a projection upon a rod which slides in a suitable
casing. A spring (or equivalent device) is applied to the sliding rod so that when
the latter is moved backwards by the cam or tappet wheel it will compress the said
spring and upon further revolution of the cam or tappet wheel the sliding rod will be
released and thrown forwards to its original position by the said spring.
The sliding rod is preferably rotated or rocked by a bandle or other convenient
means so that the cutting edge of the drill (which is fixed or formed at the end of the
sliding rod) may be moved round slightly at each blow while the apparatus is at
work.
My invention will be readily understood from the following description on reference
to the accompanying sheet of drawings on which Fig. 1 is an end elevation, and

page_text: Fig. 2 a longitudinal section, illustrating the principle of construction of my improved
drill, these are however merely illustrations. The proportions of the parts will vary
according to the work to be done by the drill as will be understood by any competent
mechanic.
a is an electro-motor of any suitable form (indicated on Fig. 1) which is by preference
carried on a base plate cast to the cylinder or casing c which contains the working
parts of the drill.
Upon the shaft a¹ of the electro-motor a (or upon a shaft suitably driven from the
said motor) I mount a cam or tappet wheel a which acts against a projection d
on the rod d' which is capable of sliding lengthwise in the cylinder or casing c.
This rod d' is also preferably so made that it can revolve or rock by passing it (as
shown on Fig. 2) through a sliding block &², to which the projection is fixed and
through loose discs el at each end of the casing c.
A handle (or its equivalent) is fitted at one end of the sliding rod d¹ and (by
preference) a socket h for holding a removable drill at the other end thereof (see
Fig. 2).
The casing or cylinder c also contains the spiral spring i which acts between the
rear end e of the casing c and the sliding block d, in which the drill rod d¹ is so
mounted that it is carried to and fro thereby.
I prefer also so to mount the cylinder or casing e that it can be moved forwards
upon a suitable framing or slide as the hole becomes deeper.
This is effected by the screwed rod carried by the framing k and passing through
the lug c on the casing c which is tapped with a similar thread.
The screwed rod may be rotated by a worm wheel
worm and handle.
If preferred the rotation of this screwed rod and also that of the drill rod d¹ may
be effected by suitable gearing from the shaft a' or otherwise.
The frame or slide is fastened by the clamp m to a stretcher bar n conveniently
fixed for drilling the coal or other mineral.
The action of the apparatus illustrated on the drawings is as follows:
The motor a being started causes the cam or tappet wheel a², to revolve in the
direction of the arrow (see Fig. 2) and come in contact with the projection d on the
sliding block d², forcing the latter back and compressing the spring i; and upon
the further revolution of the cam a², the block d² is released and thrown forwards by
the said spring i.
The drill thus works by percussion and will bore coal, rock or other substance with
great rapidity.
As the apparatus is at work the attendant slowly rocks or rotates the rod d¹
by the handle to change the position of the cutting end in the hole and he also
gradually moves the apparatus forwards on the slide k as the boring proceeds by
means of the screw 7.
It will be evident without further illustration that the cam or tappet wheel a³
may be mounted upon a short shaft carried in bearings cast or fixed to the casing c
and driven by pulleys and bands or other suitable means from an electro-motor or
other suitable engine situated at any convenient distance from the operator, the
apparatus being then held and guided entirely by him and so used as a hand tool.
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 1
claim is :-
First. The combination of an electro-motor with a cam or tappet wheel and spring
actuating a sliding drill rod substantially as hereinbefore described.
Secondly. The combination of an electro-motor with a cam or tappet wheel and
spring actuating a sliding drill rod capable of being rocked or turned as it works
substantially as herein before described and illustrated by the accompanying drawings.
Thirdly. The general arrangement of parts forming improved apparatus for drilling
coal and for similar purposes, constructed and operating substantially as hereinbefore
· described and illustrated by the accompanying drawings.

page_text: Fourthly. The combination of a cam or tappet wheel and spring actuating a
sliding drill-rod working in a convenient casing the cam being driven from a
motor at a suitable distance from the operator, and the apparatus forming a hand tool
substantially as herein before described.
Dated this 23rd day of October 1890.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.