AN IMPROVED MACHINE OR TOOL FOR DRILLING HOLES
Year: 1859

page_text: PROVISIONAL SPECIFICATION left by Welburn Williamson at the Office
of the Commissioners of Patents, with his Petition, on the 9th August
1859.
I, WELBURN WILLIAMSON, of High Holborn, in the County of Middlesex,
Engineer and Machinist, do hereby declare the nature of the said Inven-
tion for "AN IMPROVED MACHINE OR TOOL FOR DRILLING HOLES," to be as
follows:-
This Invention consists of a machine or tool for drilling holes constructed of
the following principal parts, so as to constitute either a machine to be worked
by steam power, or a tool to be used by hand as a hand drill, that is to say :-
1 employ four bevil wheels, two of which are mounted one within the other on
or around the axis of the drilling instrument or cutter, and the other two, also
one within the other, are fixed on an axis placed at right angles to the former
axis; on the latter axis a compound winch handle of peculiar construction is
fixed, and employed for imparting motion to the bevil wheels and drill, as
herein-after described. An upright piece of metal having a bracket fixed
thereto at right angles supports the horizontal and vertical axes of the
aforesaid bevil wheels. The horizontal axis on which the winch handle is
fixed is formed hollow, and through such hollow part a rod passes, one end of
which is fixed to the innermost bevil wheel, and the other end of such said
rod projects beyond the part of the winch which is fixed on the hollow axis,
and such projecting part has a groove formed around the same, into which the
prongs of a lever take for sliding such said rod to and fro, said lever being
hinged to the other part of the winch handle for that purpose, and it is to the

page_text: lower end of this hinged lever that the winch handle is fixed for imparting
rotary motion to the several parts of the drilling machine or tool. The axis
of the cutting tool or drill is a screw working in a corresponding screwed
hole; this screw has a groove or channel cut outside thereof, into which a key
or feather takes, to enable the bevil wheels to impart rotary and reciprocating
motion to the drill at the same time. It is proposed to adapt a catch to the
aforesaid hinged lever to lock it to the other part of the winch handle, for the
purpose of bringing either two of the bevil wheels into action at one time, or
all four of them; for example, when the machine is drilling a hole all the
wheels are in action, and the motion comparatively slow; but when the
drilling operation is finished, and it is required to withdraw the cutting tool or
drill and to advance it again to its work, a quick motion may then be produced
by locking the two smaller bevil wheels, and this locking may be effected by a
projecting piece on the face of one of the bevil wheels being brought into
contact with another projecting piece fixed to the aforesaid bracket of the
machine or tool, by pulling the lower end of the before-mentioned hinged
lever outwards, and holding in it that portion by a catch, as before, stated.
When it is intended to use the above drilling machine by hand as a portable
drilling tool, the work to be drilled may then be held in position by a sliding
lifting bracket, the bottom of which rests on one or other projections formed
on the upright part of the framework of the tool; it will appear oboius that
by substituting a pulley in place of the winch handle, and passing an endless
band over the same, the drill may then be work by steam power.