Improvements in Machines for Drilling Rock, Coal or other like Substances.
Year: 1898

page_text: Date of Application, 2nd Nov., 1898-Accepted, 17th Dec., 1898
A
COMPLETE SPECIFICATION.
Improvements in Machines for Drilling Rock, Coal or other like
Substances.
We, MARY ELLIOTT, of The Elms, Coal Aston, Dronfield, Widow, ALFRED
GEORGE ELLIOTT, also of The Elms aforesaid, Engineer, and ARTHUR FRY, of
No. 367, Chesterfield Road, Norton Woodseats, Sheffield, Dentist, being the
Executors named in the Will of the late George William Elliott, formerly of
The Elms, Coal Aston aforesaid, Engineer, deceased, 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 more especially to the class of machines used for boring
holes in mines, its object is first, to provide means of compensating for wear
of the nut wheel resulting from the rotation and thrust of the feed screw, and
secondly, the addition of an extensible device for filling up space between
machine and an abutment and for following up the drill.
The manner of attaining these objects will be more readily explained by
reference to the drawings hereunto annexed, wherein Fig. 1, is a side elevation
of our improved machine. Fig. 2 illustrates by section on line a, b, a device
for locking the plates in position for taking up wear. Fig. 3, represents a section
across machine on line c, d; and Fig. 4, is a cross section of the adjustable struts
on line e, f each of these sections being on an enlarged scale in relation to
Fig. 1.
In practice we proceed as follows: We construct, preferably by casting in
malleable iron, a shell or case A, through which is passed a spindle S, having
a screw thread cut thereon, this spindle also carries the drill and is actuated
in any desired manner as will be understood, although such parts are not shown.
The circular openings B, in body A, are bored or machined to receive a pair
of plates, C, C, each having washers or shoulders and a pivot hole placed excen-
trically to their periphery; centrally between said plates and resting upon said
washers is a worm wheel D, having teeth of suitable form and pitch to gear with
screw thread upon S, the several parts being held together by a pivot bolt or
pin E, passing freely through one plate C, also through centre hole of wheel
nut D, and screwing into the boss of plate C¹, pin E being operated by a hand
pin F, whereby the said plates are made to grip the sides of the wheel D, and
by so preventing the free rotation of said wheel cause the teeth thereof to operate
as a nut to the screw and so form an automatic adjustable forward feed of the
drill.
To prevent rotation of the plates C within the bearings B, a key pin G, is
passed through holes in casing A, which also engages in a pair of notches H, a
series of which are cut at intervals around the outer edges of both plates C:
whenever it becomes desirable to take up the wear of teeth in wheel D, the
key G heing withdrawn both plates C, may be rotated in the casing when as a
result of the excentricity of pivot E, the wheel D, will be thrown deeper into
gear and be so retained by the re-insertion of the key G in the proper notches.

page_text: To facilitate suspension the case A is provided with the usual means L, for
support.
The device for adjustable extension consists of a bar of channel iron I, firmly
attached to rear end of socket portion of case A, having a similar bar J, sliding
along it to which is fitted a head or claw K for pressing against any convenient
abutment, the said bars are placed together to leave room for spindle S, to
extend inside them, and being by their telescopic or sliding movement capable
of considerable variation as to their total length may be firmly cramped together
or be easily fixed by bolts passing through suitable holes formed in series in
each of the bars for that purpose.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, we declare that what
we claim is: -
1st. In machines for drilling rock coal and the like, the combination and
formation of a shell case A with side plates C having washers shoulders or faces
thereon and a pivot E placed excentrically for supporting and adjusting the
position of a nut wheel D, all substantially as described and illustrated.
2nd. In machines for drilling rock coal and the like, the combination and
use therewith of a pair of channel iron telescopic extension pieces I and J, afford-
ing an adjustable thrust support in use, substantially as set forth.
Dated
Lat do
NATAM han TRUN
Dated
Varam ban
ISAAC BECK, F.S.P.A.,
Agent for the Applicants,
Haymarket Chambers, 17, Haymarket, Sheffield.