A New or Improved Appliance for Use in Boring Machines for making Holes in Wood, and for Producing Wooden Plugs suitable for Bungs and like Articles.
Year: 1897

page_text: Date of Application, 4th June, 1897-Accepted, 9th Oct., 1897
A New or Improved Appliance for Use in Boring Machines for
making Holes in Wood, and for Producing Wooden Plugs
suitable for Bungs and like Articles.
I, BRUNO PAX, of Alban Schneidemühle opposite Bahnhof Preussisch Holland
Prussia Manufacturer, do hereby declare the nature of my said invention and in
what manner the same is to be performed to be particularly described and ascertained
in and by the following statement:
The object of this invention is a drilling or boring machine for boring holes in
wood which is arranged in such a manner that no saw dust is formed and that the
hole required to be bored through is formed by detaching the material occupying the
corresponding space in one piece so that it shall neither be wasted nor destroyed.-
According to this invention such a drill turns in such a manner that the piece cut
out remains entire and can be used for other purposes, as bungs for barrels, as studs.
and the like. In the accompanying drawings which illustrate my invention
Figure 1 is a front view partly in section, of the boring appliance in the position
it occupies when the hole is finished boring.
Figure 2 is a side view of the same appliance in position for drilling or boring.
a is the spindle or shaft of an ordinary drilling or boring machine to and from
which the new appliance can be readily connected and disconnected. b is a shell
composed of two parts placed over this spindle in such a manner that its ends act as
journals. Upon cach journal is suspended' a screw bolt d which is connected by a
tapped sleeve or nut e with a second screw bolt f the rounded ends of which are
perforated to receive a bar g upon which the knock out pin or bolt h is fixed. ¿ is
the boring spindle which is fixed to the shaft or spindle a. To enable the adjusting
device to be moved up and down with the bolt g, a slot k must be formed in the
spindle i, the lower end of which is connected with the holder by means of a screw
thread, this holder being exchangeable and carrying the tubular boring tool.
latter is inserted in the holder and is firmly locked in position by the screws n. To
prevent the tool from bending a ring o is placed inside the same, the outer diameter
of the ring being equal to the inner diameter of the tool. It is obvious that when
boring material of different thicknesses the whole boring appliance remains the same,
the tubular boring tool only being changed, that is to say the holder is replaced by
another.
The
The boring machine operates in the following manner, that is to say: The spindle i
is first connected with the spindle u; the shell b is placed over the latter; the screw
bolts & are suspended to the journals c; the bolt his connected by the screw f and.
the nuts e to the screw bolts d and at the lower end of the spindle i the holder / is
screwed in with its tool. After the spindle is set in rotation, the wood having been
first placed below the tubular tool, there is obviously formed an entirely circular
cutting surface so that when the wood is bored through, a round plug p is left and
can be utilized as above stated for different purposes. The spindle a, as well as the
spindle i, are pushed upwards, whereupon the shell b strikes against the support r of
the spindle a, the bolt h forcing the plug p out of the tubular boring tool. This
bolt h may be provided at its lower end with a triangular point, which will bear
CD..

page_text: exactly in the centre of the plug or piece. The hole formed with the aid of the
tubular boring or drilling tool is smooth and the latter is unprovided at its lower end
either with teeth or with any other sharp edges or outlines in order to prevent the
formation of saw dust and to avoid injuring the plug which is of some value. The
great advantage of this boring appliance is that it can be applied to the rotating
spindle of any boring machine or to any lathe, the exchangeability of the tubular
boring tools m and holders . rendering this appliance highly useful. Moreover the
knock out bolt h can be adjusted vertically by the screw bolts & and f and the
nuts e.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
First A boring tool for wood, which can be applied to any rotating spindle
characterized by a tubular boring tool operating without the formation of saw
dust.
Second-In boring machines of the kind above claimed, the connection of the
slotted spindle i with the rotating shaft a, this spindle i carrying at its lower end
an exchangeable tool holder with its tool m whereby a push bolt is caused to
expel the bored out wooden piece or plug p.
Third-In boring machines of the kind above described, the mechanism actuating
the bolt h consisting of a cross bar or rod g guided in the slots of the shaft i and
suspended by vertically adjustable screw bolts with perforated heals fd to a shell b
composed of two parts and striking, when the spindle is raised, against a support
thereby forcing the bored out plug p out of the boring tool m.
Dated this 3rd day of June, 1897.
GEORGE
BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.