Improvements in Hand Power Drilling Machines.
Year: 1895

page_text: Date of Application, 4th Apr., 1895
Complete Specification Left, 31st Dec., 1895-Accepted, 29th Feb., 1896
PROVISIONAL SPECIFICATION.
Improvements in Hand Power Drilling Machines.
I, THOMAS BRADLEY, 180 Avenue Parade, Accrington in the County of
Lancaster Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in hand power drilling machines, and has
for its primary object to so adapt the machine that it may be clamped to a wall
or to a post or pillar in addition to being used as an ordinary bench drill;
also to so mounting the drill that it may be adjusted in any inclined position
desired.
In carrying out my invention I provide the frame of the inachine with a two-way
socket into which the spindle carrying the clamp or foot may be inserted in either
a vertical or a horizontal position. The spindle may also be bent at right angles
near its end so that the machine may be supported in any inclined position which
may be required.
For clamping the machine to round pillars and the like, I preferably use an
adjustable chain. This chain is provided at one part with a projection or bracket
upon which the machine may be secured. Certain links of the chain are provided
with apertures by means of which any two of them may be clamped together
according to the diameter of the post &c.
I also provide the drill spindle with ball bearings to reduce friction.
This is preferably effected by confining the balls between two loose washers
placed between the shoulder on the spindle holder and the feeding screw.
Dated this 3rd day of April 1895.
THOMAS BRADLEY.
Improvements in Hand Power Drilling Machines.
THOMAS BRADLEY late of 180 Avenue Parade, but now of 224 Avenue Parade
Accrington, in the County of Lancaster, 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 stateinent :-
My invention relates to improvements in hand power drilling machines, und has
for its primary object to so adapt the machine that it may be clamped to a wall
or to a post or pillar in addition to being used as an ordinary bench drill; also to
so mounting the drill that it may be adjusted in any inclined position desired.
In carrying out my invention I provide the frame of the machine with a two-way
socket into which the spindle carrying the clamp or foot may be inserted in either
a vertical or horizontal position. The spindle may also be bent at right angles
near its end so that the machine may be supported in any inclined position which
may be desired.
For clamping the machine to round pillars and the like, I preferably use an
adjustable chain. This chain is provided at one part with a projection or bracket
upon which the machine may be secured. Certain links of the chain are provided
with apertures by means of which any two of them may be clamped together by

page_text: means of a bolt or other suitable means according to the diameter of the
post &c.
I also provide the drill spindle with ball. bearings to reduce friction. This is
effected, preferably, by confining the balls, in any well known manner, between the
shoulder on the spindle holder and the feeding screw.
Figs. 1 and 2 of the accompanying drawings illustrate the manner in which my
new two-way socket (which is the most important part of my invention) may be
applied to an ordinary drilling machine. Fig. 1 shows the machine in the usual
position as standing upon a bench &c., and Fig. 2 shows the machine as clamped
to a wall. In these views, the same reference letters indicate like parts where-
ever they occur. A is the ordinary foot, which is arranged to be clamped to a
bench or to a wall &c. This foot carries the spindle B upon which the drilling
machine is mounted by means of a two-way socket C which is secured to or formed
in one piece with the web or bracket D carrying the drill spindle E, fly wheel F
and the usual gearing. The spindle and socket are clamped together in any
suitable manner. By means of the two-way socket C the drilling machine may
be used in the ordinary manner as shown in Fig. 1 or be clamped to a wall &c. as
shown in Fig. 2. It will be noted that the drilling machine may be turned into
any position about the spindle B as axis. The two-way socket may be applied to
drilling machines baving frames of various forms in addition to the one illustrated.
By bending the spindle B at right angles near its end, the drilling machine
may be supported in any inclined position desired.
Fig. 3 illustrates the manner in which ball bearings may be applied to a drilling
machine. F is the spindle holder and G is the feeding screw provided with the
handle H. The antifriction balls I revolve between a shoulder K on the spindle
holder and the interior of a cup L which may be loose or secured to the end of the
feeding screw.
Fig. 4 shows the manner in which a drilling machine may be clamped to a
post,
Figs. 5 & 6 being separate views of the chain.
To the ends of the base A chains are attached, the links M of which are made
of the form shown, some of the links being provided with screwed apertures N 80
that on the chain being applied to a pillar or post O two of them may be secured
by a bolt P or other suitable means.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
(1) In hand power drilling machines the use of a two-way socket C substantially
as described and illustrated.
(2) In hand power drilling machines bending the spindle B at right angles near
the end so that the machine may be supported in any inclined position substantially
as described.
(3) In hand power drilling machines providing the drill spindle with ball
bearings, substantially as described.
(4) In hand power drilling machines, the chain clamping arrangement
substantially as described.
(5) The improvements in hand power drilling machines substantially as described
& shown on the accompanying drawings.
Dated this 30th day of December 1895.
THOMAS BRADLEY.