Improvements in and relating to Chucks or Holders for Drilling, Boring, and other such like Purposes.
Year: 1893

page_text: UUMIDELE
Improvements in and relating to Chucks or Holders for Drilling,
Boring, and other such like Purposes.
We, RICHARD CHARLES BRAITHWAITE and WALTER KIRK of Crown Bridge
Works, Swan Village West Bromwich, Manufacturer, and WILLIAM CHATTAWAY
of Great Bridge Street, West Bromwich, Works Manager, both in the County of
Stafford, do hereby declare the nature of our said invention and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement:-
Our invention has for its object improvements in and relating to chucks or holders
for drilling boring, and other such like purposes by which we render the insertion
and removal of the drill from the chuck very easy and simple and so that either
can be effected without the necessity of stopping the machine. When fixed in
accordance with our invention the drill is also much steadier and true when at work.
In order that our invention may be clearly understood and more easily carried
into practice we have appended hereunto a double sized sheet of drawings upon
which we have fully illustrated the nature of our said improvements.
Figure 1, is a sectional elevation through the chuck with the drill inserted.
Figure 2, is a sectional plan of same but with the drill removed.
Figure 3, is a plan of the top end of the drill.
Figure 4, is an elevation of Figure 3.
In carrying our invention into effect we form the recess a¹ in the chuck A within
which recess the block 6' bearing the centre B is mounted. Between this centre B
and the work which is operated upon, the drill E is poised being revolved by the
pin forming the pegs e¹ which is passed through the drill or the pegs may be formed
upon the drill E so as to engage with the projections f upon the screw plug F
which screw plug is provided with the centre hole f which is so shaped as to allow
of the top and pegs e¹ of the drill E being inserted up this aperture into the
chuck A until the pegs e¹ are above the shoulders when a slight turn brings the
pegs round until they engage with the projections f¹ the drill E being thus retained
from dropping out until the drill is turned the reverse way when the pegs e¹ are
again brought over the aperture when the drill drops out or can be readily
withdrawn from the chuck. The screw block F is shown screwed into the chuck
but we may connect or fasten it to the chuck in a similar way to that by which
the drill is secured, i.e. by projecting shoulders on the chuck and pegs on the block
which would engage with the same. By our improvements any hole in the side of
the chuck or set pins is dispensed with.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what we
claim is:
In chucks or holders for drilling boring and other such like purposes the mode of
and means for mounting the drill so as to be readily inserted or removed substan-
tially such as herein set forth and shown upon the accompanying sheet of drawings.
Dated this 2nd day of August 1893.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicants.