Improvements in Hand Drills.
Year: 1893

page_text: Date of Application, 20th Jan., 1893
Complete Specification Left, 17th Oct., 1893-Accepted, 18th Nov., 1893
PROVISIONAL SPECIFICATION.
Improvements in Hand Drills.
I, WILLIAM WARD of 97 Ward Street Sunderland Durham Engineer do
hereby declare the nature of this invention to be as follows:-
This invention relates to an improved hand drill which can be readily fixed in
any desired position, taking up very little room and which will be capable of
drilling through considerable thicknesses of metal. The support or frame of the
drill consists of a bent rod, having a socket at its upper end tapped to receive a
hollow screw which passes through it, extending for some distance on both sides.
Through this screw passes the rod carrying the drill, which can be removed when
desired and another of different size inserted. This rod is slightly longer than the
screw and moves loosely in it, but is prevented from coming out by a boss at each
end, to the upper one of which is fixed a handle which serves to revolve the drill.
Two arms are fixed to the screw, one at each end, the upper one having its end
bent slightly upwards or furnished with a small projection. The arrangement is
such that the handle arm when pressed down will meet this projecting part and
cause the screw to revolve. This is done until the drill meets the article in which
the hole is to be made, the handle then being moved up slightly, missing the
projection. The pressure is put on by means of the lower arm.which is turned
whenever required. In order to support the article to be drilled a small bracket is
provided, with a perforation which allows it to be slipped on the main arm of the
frame. The bracket projects vertically on both sides of the frame, forming bearing
faces. The rod is furnished with a number of holes into one of which a pin is.
placed, which holds up the bracket, the bearing surfaces causing it to project at
right angles. The pin can be placed in any of these holes, thus supporting the
bracket at any desired height. A small table is fixed on this bracket by a bolt and
nut, or a device is employed to hold articles through which longitudinal holes are
to be drilled, consisting of an L shaped plate, one side of which is bolted to the
bracket. The article to be drilled is held by a small plate with two bolts and nuts
which grips the article between it and the vertical part of the L shaped plate.
Dated this 20th day of January 1893.
GEO. H. RAYNER,
37, Chancery Lane, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Hand Drills.
I, WILLIAM WARD, formerly of 97, Ward Street, Sunderland, Durham, and
now of High Street, Portishead, Somerset, 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 :-
This invention, which relates to hand drills, consists in improvements whereby
time and labour are saved in lowering the drilling tool or bitt preparatory to
commencing the operation of boring and also in raising the tool or bitt.
According to this invention, the spindle which carries the bitt is passed through
a hollow screw free to turn in a socket in a suitable frame. The spindle is fitted at
top with a hand lever. From the top of the hollow screw extends an arm having
at its outer end an upward projection. The spindle carrying the bitt has vertical
play within the hollow screw to a limited extent. In the normal position of the
bitt, that is to say, when out of action, the hand lever aforesaid by which the
Price 8d 1

page_text: spindle is rotated lies partially below the top of the projection of the arm aforesaid
and, accordingly, if the hand lever, when in this position, be operated, both the
spindle and the hollow screw rotate together and are drawn up or down according
to the direction in which the hand lever is moved. When, however, the bitt is
brought into contact with the surface of any substance to be drilled, the spindle is
lifted and the hand lever raised clear of the projection on the arm fixed at the
upper end of the hollow screw which is not now rotated by moving the hand lever.
The necessary pressure for the bitt, as boring progresses, is applied, as required,
through the medium of a bar fixed upon the lower end of the hollow screw. This
mode of exerting pressure is not novel. When a hole has been made completely
through the material being bored, the bitt, being no longer supported thereby,
drops, as does also the spindle. Consequently, the hand lever resumes its normal
position and, on being turned in the reverse direction to that required for boring,
raises the spindle and hollow screw together.
In the accompanying sheet of drawings,
Fig. 1 represents a side view of a hand drill constructed and arranged in
accordance with this invention.
At Fig. 2, which is also a side view of the appliance, the bitt is represented in
the act of boring.
The spindle a, which carries in a socket provided in the boss a¹ the boring tool
or bitt b, is passed through a hollow screw fitting in the screw-threaded socket c¹
provided in the frame c.
fi
To the top of the spindle a is fixed a hand lever d below which is an arm e fixed
to the upper end of the hollow screw c and extending horizontally therefrom. At
its outer end the arm e is furnished with an upwardly extending projection e. The
spindle a has vertical play within the screw c and when the tool is out of action,
the spindle is at its lowest limit of travel and the hand lever d lies partially below
the top of the projection e¹ of the arm e as seen at Fig. 1. When this is so, it will
be clear that if the hand lever d be turned, the spindle a and the screw c will turn
together and the bitt will be raised or lowered according to the direction in which
the hand lever is moved.
When, however, the bitt comes into contact with any substance to be bored,
the spindle a is, before boring commences, raised and the hand lever d is lifted
above the projection e' on the arm e, as seen at Fig. 2.
Consequently, movement of the hand lever d does not now cause the hollow
screw c to turn in its socket. The necessary pressure to be applied as boring
progresses is effected by turning in the proper direction the barf fixed at the
lower end of the screw c.
The frame is fitted with an adjustable bracket g and table h, details which do
not constitute novel features.
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 I
claim is :-
A hand drill in which the spindle carrying the boring tool or bitt is passed
through and has limited vertical play within a hollow screw such as c provided with
an arm such as e with upwardly extending projection e¹ below the top of which
latter the hand lever for rotating the tool in part falls when the tool is not in action
and above which it rises when the tool comes into contact with the material or
substance to be bored, substantially as herein before described with reference to the
accompanying drawing.
Dated this 14th day of October 1893.
NICHOLAS WATTS,
Chartered Patent Agent.