Improvements in Hollow Augers.
Year: 1897

page_text: Date of Application, 4th Oct., 1897--Accepted, 20th Nov., 1897
Improvements in Hollow Augers.
I, JOHN ROBERT BURDIN, of Church Street, Southwell, Notts. Joiner and Wheel-
wright, 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:-
My invention relates to hollow augers, and more especially to those used for
forming tangs on wooden wheel spokes. Although particularly intended to the
above mentioned purpose, I do not restrict myself to that one use, as it can be
employed for any other purpose to which it can be applied. The appnance consists
essentially of a pair of somewhat quadrant shaped jaws pivotted or hinged
together. These jaws move over one another, and at their outer end have a curved
slot, the centre from which the curve is struck, being the centre on which the
hinged jaws turn. A screw threaded rod is provided by which the jaws can be
opened or closed, there being two ears on each jaw. The screwed rod passes
through these ears and between each pair of ears is a nut by turning which the
jaws can be opened or closed. A cutter or blade (preferably similar to a plane
iron) is passed downwards at a cutting angle through one arm of one of the jaws.
The tool may be rotated in use by any suitable means, such as by a brace in the
manner of an ordinary boring bit, and to this end I provide the tool with a fork
having a tang for inserting in the brace. The fork has feet, one of which is
fastened to the bolt on which the jaws work, the other foot standing over the
curved slot already mentioned, and a bolt passing through the foot and through
the slot provides a means for tightening up the jaws after adjustment and also for
holding down the foot of the fork. In order to further explain my invention, I
make reference to the accompanying sheet of drawings in which Fig. 1, is a plan,
and Fig. 2, a sectional end view of the two jaws, and Fig. 3, a plan, and Fig. 4,
a side view of the fork in position on the jaws. Similar letters indicate similar
parts.
j
a and b are the two jaws working on a screw c.
The outer ends of the jaws are
halved as at e, so as to make the opposite faces of the jaws flush. f are the slots.
the screw threaded rod passed through the ears h, one pair of ears h being on a
and the other pair on b. Between each pair of ears h is a nut i threaded on the
rod g and by rotating these nuts, the jaws a and b can be opened or closed. is
the cutter or blade passed through one of the jaws (say a), the cutting edge coming
out, on the under side of the jaw through which it passes. k is the fork, and
and m the feet, one foot m being bolted over c, the screw forming the turning
point of the two jaws a and b. The bolt n passes through the other foot / and
also through the slots f in a and b. is the tang of the fork for inserting in the
brace or other appliance by which the tool is to be rotated. The under side of
jaw a is recessed as at q so that the head of the bolt n can slide freely therein and
remain flush with the under surface of the slotted part.
The tip of the tang of the spokes having been trimmed, is placed between
the jaws a and b. The jaws are then brought into contact with the tang by the
adjusting nuts i. After which the nut on the bolt n passing through slots f is

page_text: tightened up, and the tang completed by rotating the fork k and consequently
the cutter J.
I do not restrict myself to the precise shapes, relative proportions or disposition
of parts, as described in the above specification or exemplified in the accompanying
drawing, as any or all of them may be considerably varied 'without departing
from the spirit of my invention.
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 I
claim is:-
4
A hollow auger, consisting essentially of two, suitably shaped and hinged jaws
having slots and a screw threaded rod operated by nuts working between ears on
each of the jaws so that the jaws may be opened to and retained at any required
distance apart within the limits of the tool. One of the said jaws being provided
with a cutting blade, and the whole being rotated during use by a fork having
a tang operated by a brace or other means. One foot of the said fork being held
by a bolt or screw passing through the centre on which the jaws turn, and the
other having a bolt passing through the above mentioned slots for the purpose of
retaining the jaws in their working position, the whole substantially as described
in the above specification, and exemplified in the accompanying drawings.
Dated this 23rd day of August 1897.
HUGHES & YOUNG,
23 Coleman Street, London, E.C., Agents for Applicant.