Improvements in Boring Bits.
Year: 1891

page_text: Date of Application, 15th Sept., 1891
Complete Specification Left, 29th Oct., 1891-Accepted, 14th Nov., 1891
PROVISIONAL SPECIFICATION.
Improvements in Boring Bits.
ELWOOD C. PHILLIPS, Chicago, Illinois, U.S.A. (27 Woodstock Road,
Bedford Park, Chiswick), Inventor. I do hereby declare the nature of this inven-
tion to be as follows:-
This invention relates to improvements in boring bits, and the objects of my
improvements are first to provide a bit, which can be cheaply constructed; second,
to so construct this bit, that its shank and cutter will be separable, and third, to
so construct the cutter, that an ordinary wood screw may be used as the screw
point.
To concisely describe my invention, it consists of a shank, which is squared at
one end to fit a brace or handle, which is turn the bit. At the other end this
shank is slightly enlarged and screw-threaded to engage the screw-threaded in
recess of the cutter, and the shank is slightly bevelled at the end. The cutter
externally is an ordinary auger, except that the screw point is omitted, and down
through the centre of this cutter is bored a hole. From the top, down to about
the centre this hole is enlarged to form a recess.
The interior of this recess is
screw-threaded. The recess is of such a diameter, that the head of a common
wood screw can easily pass into it. Where this recess joins the hole an oblique
ledge is formed, upon which the head of the screw rests.
When the device is put together, an ordinary wood screw is inserted in the
recess, and pushed down until the head comes in contact with the ledge. The end
of the said screw is then projecting through the hole, to some distance below the
cutter, and forms the screw point of said cutter. The screw is held firmly by the
end of the shank pressing against it, or the end of the shank may be provided
with a projection similar to a screw driver end. This projection, when the shank
is screwed into the cutter, engages the cut in the screw, and forces the said screw
to turn with it. When the cutter is not in use, this shank can be used as a screw
driver. The screw, which is continually, by striking nails or otherwise, having its
threads broken, can easily be replaced, or different sized screws can be inserted, for
different characters of work.
Dated this 11th day of September 1891.
COMPLETE SPECIFICATION.
Improvements in Boring Bits.
I, ELWOOD C. PHILLIPS, Chicago, Illinois, U.S.A. (27 Woodstock Road,
Bedford Park, Chiswick), Inventor, 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 improvements in boring-bits; and the objects of my
improvements are, first, to provide a bit which can be cheaply constructed; second,
to so construct this bit that its shank and cutter will be separable; third, to so
construct the cutter that an ordinary wood-screw may be used as its screw-point.
In the accompanying drawings,
Figure 1 represents a side elevation of the devices embodying my invention.
Fig. 2 represents a longitudinal section through the same, the shank being

page_text: Fig. 3 represents a perspective detail view of the shank; and
Fig. 4 represents a longitudinal section through the cutter and screw-point, a
modified shank being attached.
A designates the shank, which is squared at one end a to fit the brace or handle
which is to turn the bit. At a' the other end this shank is screw-threaded to
engage the screw-threaded recess 6 in cutter B. The cutter B externally is a
ordinary auger-cutter except that the screw point is omitted. Down through the
center of this cutter is bored a hole 6. From the top down to about the center
this hole is enlarged to form a recess b. The interior of this recess is screw
threaded and is of such a diameter that the head of a common wood-screw c can
easily pass into it. Where this recess joins the hole b¹ an oblique ledge b' is formed,
upon which the head of the screw c rests.
When the device is to be put together, an ordinary wood-screw c is inserted in
recess b and pushed down until its head c¹ comes in contact with ledge b'. The end
of said screw is then projecting through hole b' to some distance below cutter B,
and forms the screw-point of said cutter. The screw is held firmly by end a¹ of
shank A. pressing against it, or, preferably, as shown in Fig. 2, the end a' is pro-
vided with a projection a, similar to a screw-driver end. This projection, when
shank A is screwed into cutter B, engages the cut & in screw c and forces said
screw to turn with it. When the cutter is not in use, this shank can be used as a
screw-driver. Of course any-sized cutter may be fitted to the shank.
The screw c, which is continuously, by striking nails or otherwise, having its
threads broken, can easily be replaced, or different-sized screws can be inserted for
different character of work.
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 :
1. In a boring-bit, the combination of a shank with a cutter detachable there-
from, said shank and cutter being constructed with engaging parts, and a screw
which is separable from said shank and cutter, but held in place by the engage-
ment of the latter with each other, substantially as set forth.
2. In a boring-bit, the combination of a solid screw-threaded shank with a screw-
threaded cutter engaging the said shank and a screw, the three being separable and
the screw being held in place by the engagement of said. shank with said cutter,
* substantially as set forth.
3. In a boring-bit, the combination of a screw-threaded shank with a cutter
having a screw-threaded recess and a hole extending longitudinally through its
center and a screw-point, the three being separable and the latter held in place by
the engagement of said shank and cutter, the screw-point passing through the said
hole, substantially as set forth.
4. In a boring-bit, the combination of a screw-threaded shank having a screw
driver point with a cutter having a screw-threaded recess to engage said shank
and a screw-point held in place in said recess by said screw-driver point, sub-
stantially as set forth.
5. In a boring-bit, the combination of a shank screw-threaded at one end and
squared at the other with a cutter provided with a screw-threaded recess to engage
said shank, a ledge in said recess, and a screw. having its head held firmly in place
between said ledge and said shank, substantially as set forth and for the purposes
described.
Dated thin 50th 001