Improvements connected with Rock Drills.
Year: 1892

page_text: Date of Application, 12th Apr., 1892
Complete Specification Left, 11th Jan., 1893-Accepted, 11th Mar., 1893
PROVISIONAL SPECIFICATION.
Improvements connected with Rock Drills.
WALTER OSMOND ROOPER & HOWARD GEORGE TOZER 11 Bridge Street
Northampton trading as W. O. Rooper & Tozer Electrical Engineers do hereby
declare the nature of this invention to be as follows:-
The object of this invention is to apply electrical power in an efficient manner to
drilling or boring machinery, more especially for mining purposes, in such a way as
to combine portability and ease of adjustment with rigidity.
Upon the top of a small trolley or wheeled carriage an upright drilling post is
vertically fixed, having upon its topmost extremity a jackscrew or a plate fitted
with two jackscrews, for temporarily securing it to the roof of the cutting or tunnel,
& carrying upon itself a metal sleeve capable of being moved up or down, fitted
with suitable tightening screws for holding it in any desired position. Attached to
this sleeve are two trunnions which carry a metal frame projecting on each side of
the sleeve. This frame carries at one end a small electric motor, driving by means
of belting & pulleys, or geared tooth wheels and a long spindle an Ingersoll or
other approved percussive or rotary drilling machine bolted horizontally at the
other extremity of the frame aforesaid. By means of a radius bar attached to this
frame and a set screw fitting into the sleeve through the bar, the frame can be
raised or depressed to any angle so that oblique as well as horizontal holes can be
bored.
In some cases I dispense with the truck to carry the vertical drilling post &
use a horizontal post instead upon which is fitted the moveable sleeve already
described.
Dated this 11th Jon of A: 1000
W. O. ROOPER.
H. G. TOZER.
COMPLETE SPECIFICATION.
Improvements connected with Rock Drills.
WALTER OSMOND ROOPER & Howard GEORGE TOZER 11 Bridge Street
Northampton trading as W. O. Rooper & Tozer Electrical 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 :-
Upon the top of a small trolley or wheeled carriage marked A on accompanying
drawing an upright drilling post B is vertically fixed, having upon its topmost
extremity a jackscrew C, or a plate fitted with two jackscrews for temporarily
Becuring it to the roof of the cutting or tunnel, and carrying upon itself a metal
sleeve D capable of being moved up or down, and fitted with suitable tightening
screws marked E for holding it in any desired position. Attached to this sleeve
are two trunnions F which carry a metal frame G projecting on each side of the
sleeve. This frame carries at one end a small electric motor H, driving by means
of belting and pulleys shown at I or geared tooth wheels and a long spindle Ka
Bromfield-Ingersoll or other approved percussive or rotatory drilling machine L
bolted horizontally at the other extremity of the frame aforesaid. By means of a
radius bar M attached to this frame, and a set screw N fitting into the sleeve
through the bar, the frame can be raised or depressed to any angle, so that oblique
as well as horizontal holes can be bored. In some cases we dispense with the
truck to carry the vertical drilling post and use a horizontal post instead upon
which is fitted the moveable sleeve already described.

page_text: 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 combination of an electric motor with a Bromfield-Ingersoll rock
drilling machine mounted on a frame as heretofore described.
2. The combination of an electric motor with a percussive or rotatory drilling
machine on a moveable carriage as heretofore described.
3. The combination of a swinging frame carrying an electric motor and drill,
& with a moveable sleeve sliding on a vertical post so that holes at any angle or
elevation can be drilled.
Dated this 10th day of Janu 1902
W. O. ROOPER.
H. G. TOZER.