Improvements in and relating to Wood Augers.
Year: 1890

page_text: Date of Application, 11th Feb., 1890-Accepted, 15th Mar., 1890
COMPLETE SPECIFICATION.
Improvements in and relating to Wood Augers.
I, HENRY LOFTIE, of Nos. 42 to 52, West Onondaga Street, in the City of Syracuse,
County of Onondaga and State of New York, one of the United States of America,
Manufacturer, 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 Wood Augers. Heretofore, it has been customary to
construct wood augers with inverted cone shaped entering or centering points with or
without screw-threads.
It has been found in practice that where an auger having either of the above
entering points has been employed for boring thin hard or brittle wood, that cracking
and splitting of the same frequently follows from the fact that as the entering point
increases in width from tip to base, it acts as a wedge, and forces the fibres of
the wood apart in entering instead of cutting its way to the cutting lips.
Moreover, when veneered wood is to be bored it often happens that the veneering
is broken loose from its backing by following the pitch of the threads on the entering
point, which threads in a certain sense, act as a lever thereby marring the veneering
for a space larger in circumference than the size of the auger. Moreover, where the
screw-threaded or gimlet pointed auger has been used for any great length of time,
and the threads have become worn, it is practically rendered useless for boring hard
or end. wood, and for the reason that the screw fails to take sufficient hold on
the grain of the wood to cause the auger to follow without applying great pressure
thereto.
It is the object of the present invention to overcome these inconveniences by
constructing an auger having an entering point of such configuration, that it may be
used for drilling any kind of wood without the least fear of cracking or splitting the
same, and which may with readiness and ease be kept in condition for doing good and
effective work at but a small expense of time or trouble.
To these ends the invention consists in a wood auger having a solid cylindrical
entering point, the body portion of which is the same diameter, in cross-section
throughout its entire length; furthermore, in a wood' auger having a solid cylindrical
entering point, the body portion of which is the same diameter in cross-section
throughout its entire length and beveled at its lower end; furthermore, in a wood
auger having a solid cylindrical entering point, the body portion of which is the same
diameter in cross-section throughout its entire length and beveled at its lower end,
said beveled portion having an angular point; furthermore, in a wood auger having a
solid cylindrical entering point, the body portion of which is the same diameter in
cross-section throughout its entire length, and beveled at its lower end, said beveled
portion having an angular point and inclined cutting edges; and finally, in the various
novel details of construction, as will be hereinafter fully described in the specification,
illustrated in the drawings, and particularly pointed out in the claims.
In the accompanying drawings forming a part of this specification, I have illus-
trated one form of device embodying the essential features of my invention, although
the same may be carried into effect in other ways without in the least departing from
the spirit thereof, and in these drawings—
Figure 1, is a perspective view of a portion of an auger, provided with my peculiar
entering point;
Figure 2, is a side elevation, showing particularly the beveled end of the entering
point, and
Figure 3. is a similar view, showing the angular point:
"

page_text: Referring to the drawings, A, designates an auger which may be of any construction,
but by preference one of that class known as "twist augers is shown.
"
B, designates the entering point which is composed of two parts; the solid
cylindrical body portion, 1, which extends from the base, 2, of the auger to the
front, 3, and which, as will be seen, is of the same diameter in cross-section throughout
its entire length, and the end portion, 4, which extends from the point, 3, to the
angular portion, 5, which forms the entering point proper. From the point, 3, the
metal of the end portion is reduced to form a wedge-shaped end as shown at, 6,
and this reduced or wedge-shaped portion may be made abrupt or gradual, as desired,
but for obvious reasons, the latter is preferred. The point of the end is ground to
form an angle, as shown at, 5, and the sides of this angle are further ground to form
cutting edges, 61, which will allow said point to enter the hardest wood without the
danger of cracking or splitting the same. If desired, the front may be left square or
awl pointed, but the angular form is preferred.
From the foregoing description, taken in connection with the drawings, the,
advantages of this form of entering point over those in ordinary use will readily
be appreciated.
It will be seen that an auger entering point so constructed will cut through the
fibres of the wood in the same manner as a bradawl, and will not split the veneer in
the least, furthermore, that by making the entering point in the shape described it
will be entirely within the range of an ordinary mechanic's ability to keep the entering
point in the best condition for doing good and effective work.
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-
1. A wood auger having a solid cylindrical entering point, the body portion of
which is of the same diameter in cross-section throughout its entire length, substantially
as described.
2. A wood auger having a solid cylindrical entering point, the body portion of
which is of the same diameter in cross-section throughout its entire length, and
beveled on its lower end, substantially as described.
3. A wood auger having a solid cylindrical entering point, the body portion of
which is of the same diameter in cross-section throughout its entire length, and
beveled on its lower end, said beveled portion having an angular point, substantially
as described.
4. A wood auger having a solid cylindrical entering point, the body portion of
which is of the same diameter in cross-section throughout its entire length, and
beveled at its lower end, said beveled portion having an angular point and inclined
cutting edges, substantially as described.
Dated the 11th day of
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.