Improvements in and connected with Drilling Apparatus for Mining and other purposes.
Year: 1893

page_text: Date of Application, 11th Oct., 1893
Complete Specification Left, 10th July, 1894-Accepted, 11th Aug., 1894
PROVISIONAL SPECIFICATION.
Improvements in and connected with Drilling Apparatus for
Mining and other purposes.
I, JOHN THOMAS BLACKETT of 22 Chapel Street, Guisbrough, Yorkshire,
Foreman Turner and Fitter do hereby declare the nature of this invention to be
as follows:-
My said invention, has reference to the use, of a ratchet in combination, with a
system of spur or bevil wheels, for the purpose of giving, a continous rotary
motion to a spiral, or other drill. And to a divided nut, and the system of releasing
the same, from the feed screw, so that the drill may be rapidly withdrawn from
the hole, whether for the purpose of substituting a longer drill, or because the
hole is sufficiently deep.
My invention or improvements consist all as follows;-I form a sleeve through
which works, a spindle, grooved and screwed, to work in a divided nut, to give the
necessary forward motion to the drill which is fixed in the open end, of the spindle.
Upon the aforementioned sleeve are two spur wheels the one fast, and the other
loose, with a lever in between, engaging in the spur wheels by means of 2 pawls,
fixed to the lever, one pawl engaging in teeth when the lever is moved in one
direction, the other when it is moved in the opposite direction. One wheel drives
direct, and the other (the loose one) in connection with a system of stud and other
wheels, so arranged as to turn the spindle in the same direction, as if the lever had
been moved in the opposite direction. The pawls can be thrown out of gear, so
that if desired, the ratchet, can be used as an ordinary single action ratchet.
The aforementioned nut, consists of 2 outer frames, on the inside of which are
2 cam plates engaging with the opposite halves of a divided nut, so that by simply
throwing over a combined lever, the nut is opened, and freed from the thread of
the feed screw, to permit of rapid withdrawl.
10th day of October 1893.
JOHN THOMAS BLACKETT.
COMPLETE SPECIFICATION.
Improvements in and connected with Drilling Apparatus for
Mining and other purposes.
JOHN THOMAS BLACKETT, Ivy House, 22 Chapel Street, Guisboro' Yorkshire,
Foreman Turner and Fitter, 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:—
My said invention has reference to the use of a ratchet in combination with a
system of spur or bevel wheels, for the purpose of giving a continuous rotary
motion to a spiral or other drill and to a divided nut and the system of releasing
same from the feed screw, so that the drill may be rapidly withdrawn from the
hole, whether for the purpose of substituting a fonger drill or because the hole is
sufficiently deep.
In order that my invention may be fully understood I now refer to the annexed
drawings in which :-

page_text: Figure 3 view or cam plate.
Referring to Figure 1 a is the spindle carrying the drill & which is screwed a
sufficient distance; a groove b is cut in same, and upon this part of the spindle, a
loose sleeve or collar c is mounted and having a key which engages in the groove b.
d is a lever carrying the pawls e & f. The pawl e acts upon a ratchet wheel
which drives the spindle a in one direction; the pawl engages in a ratchet
wheel h, which extends to the toothed wheel which drives the wheel j in con-
nection with the spindle a, through the medium of the gear wheels k, l, & v.
pawls & fare so arranged as to take or operate in one direction only thus when
the lever d is moved in one direction, the pawl e acts upon the ratchet wheel
and when the lever is moved in the opposite direction the pawl facts upon the
ratchet wheel h.
The
The split nut p, shown in Figure 3 has two projections m, on each side; these
projections enter the cam grooves n in the cam plate o. There are, two of these
cam plates o, one on each side of the split nut p and each cam plate o has a square r
or aperture on same, a bent rod or handle g having a square or square hole in each
end, in which said squares or square holes r engage, so that both cam plates o are
operated together. The spindle a passes through the split nut p, so that by closing
or separating the parts of same, the spindle a is caused to travel. By this means
the spindle a can be readily removed from the work as desired. It will be seen
that the sleeve or collar c rotates the spindle a in one direction owing to the
employment of gear wheels as aforesaid. The split nut p may be placed between
two plates or the likes one of which is shown in Figure 1.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what I
claim is.
1. In combination a drilling apparatus for mining and other purposes consisting
of a loose sleeve working upon a spindle & driving same through the medium of a
slot in the spindle and a key, a lever carrying the pawls e & f which "take" or
act in opposite directions & gear with ratchet wheels, one driving the spindle
direct, and the other driving the spindle through the medium of gear wheels, a split
nut encircling said spindle at its screwed part operated by cam plates connected
together and by a bent rod or lever, by which arrangement the drill or screw will
tend to rotate in one direction, while the lever is going backward and forward,
thereby obtaining a continuous motion substantially as described and illustrated.
Dated this 10th day of July 1894.
E. EATON,
Agent for Applicant.