Drilling Machine.
Year: 1894

page_text: Date of Application. 23rd May, 1894
Complete Specification Left, 23rd Feb., 1895-Accepted, 23rd Mar.. 1895
WILHELM CHARLES FISCHER Engineer 175 West Georges Street Glasgow
do hereby declare the nature of this invention to be as follows:-
The drilling machine is provided with a spirit level to observe the horizontal and
vertical position of the drill, it will be hereby seen that the hole is absolutely in the
square and level.
The invention or improvement is in combining the spirit level with the drilling
machine.
Glasgow, 22nd day of May 1894.
Drilling Machine.
I WILHELM CHARLES FISCHER of 175 West Georges Street, Glasgow in
Lanarkshire, 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 relates to drilling machines and consists in combining a spirit-
level with the drilling machine for the purpose of setting the drill spindle in
a position vertical to the surface of the piece to be drilled by observing the spirit-
level. The invention is more particularly intended for breast and band drilling
machines, but generally applicable to portable drilling machines actuated by hand
or power, the spirit-level being inserted into- or attached to any convenient part of
the frame of said machines.
On the drawing appended hereunto my invention is shewn applied to a breast
drill, Fig. 1 showing a top view and Fig. 2 a side view of the same, Fig. 3 an
enlarged section showing the spirit level and Fig. 4 a modified manner of mounting
the same.
The drilling machine itself may be constructed in any ordinary way and its
general construction does not form part of my invention.
In carrying out my invention I form the frame of the machine or a part thereof
so that a spirit level can be conveniently attached thereto or inserted thereinto.
In case of the breast drill shewn on the drawing the frame a is made open and the
level arranged in the middle opening.
Preferably attach the level in such a manner that it can be set at various
angles to the centre line of the drill spindle c. This may be done by forming the
case of the level with a transverse boss 6' and passing through the same and the
frame sides a bolt d, the frame sides being bored square to the centre line of the drill
spindle for this purpose. The bolt is formed with a cylindrical head d¹ which
passes through the hole in the right frame-side and forms the pivot for the level on
that side, so that by tightening the nut of the bolt the boss of the level is
drawn tight against the left frame side. A pointer 62 on the boss of the level and
a mark on the trame serve to set the level conaxially with or parallel to the centre

page_text: line of the drill spindle. The underside of the breast plate a¹ and of the foot a²
formed on the frame are adjusted so that the dotted line tangential thereto is
parallel with the centre line of the drill spindle.
This arrangement of the level and frame is intended for use when drilling heavy
pieces the surfaces of which may not be in a vertical position. After placing a set
square against the surface and the drill with the feet upon it, the spirit level is
adjusted till it is horizontal. The set square is then removed and the drill adjusted
vertically against the breast according to the indication of the spirit level, when the
drill spindle will be square with the surface in a vertical direction the squareness in
a horizontal plane being adjusted by the eye of the workman.
In the modification shown by Fig. 4 the case for the glass tube of the level is
cast in between the cross bars a² a³ of the frame and bored out conaxially with the
drill spindle. This arrangement is suitable in cases where the drill is used for
drilling holes into surfaces previously set vertical.
Obviously the level may be arranged so that it is or can be set square to the
centre line of the spindle for setting the spindles of portable drilling machines
square to surfaces to be drilled from the top.
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 :-
:-
In breast hand and portable drilling machines the combination therewith or
arrangement as part thereof of a spirit, level substantially as and for the purposes
..set forth.
R. J. URQUHART,
57, Barton Arcade, Manchester, and 5, Clayton Square, Liverpool,
Consulting Engineer and Patent Agent.