A New or Improved Attachment for Augers.
Year: 1889

page_text: Date of Application, 22nd Oct., 1889
Complete Specification Left, 20th Aug., 1890-Accepted, 22nd Oct., 1890
PROVISIONAL SPECIFICATION.
A New or Improved Attachment for Augers.
I, HENRY JOHN PARKER JOLLY of St. Mary's Villa Russell Road Ipswich Suffolk
Commercial Traveller, do hereby declare the nature of this invention to be as
follows:-
My attachment for augers is intended to facilitate the enlargement of the whole or
a portion of the length of a hole after it has been bored. This is frequently necessary,
and the absence of any hold for the screw spur at the point of the auger in the act of
re-boring renders it so difficult that it may be called impracticable except by just filling
the small hole by a plug of wood.
My invention overcomes all difficulties, avoids the necessity for any plugging with
wood and any removal of the remainder of such plug after an enlargement of a portion
of the length of a hole and ensures that the enlargement shall be exactly concentric
to the original smaller hole. I attain this by providing a block, of a size and form to
fit tightly in the smaller hole. In such block the screw spur of the larger auger is
engaged, and as the large auger of the diameter required to produce the enlarged
hole is inserted and revolved, the smooth round block travels ahead of it in the small
hole & keeps it exactly guided. In what I esteem the most complete form of the
invention the block is of soft metal near its axis and is prepared beforehand with a
tapering hole without threads, and this hole is afterwards threaded by the introduction
of the screw spur of the larger auger. This ensures that the block shall accurately
match the large auger on which it is used. But if care be taken to make the screw
spur of a certain size and pitch the block may be previously threaded to an exactly
corresponding condition. I propose to arrange my blocks in sets-one or more for
each size of small augers used.
The term "pilot" may be applied to my block as indicating its function of guiding
accurately the centre of the larger auger.
Dated this 22nd day of October 1889.
HENRY JOHN PARKER JOLLY.
COMPLETE SPECIFICATION.
A New or Improved Attachment for Augers.
A communication from W. J. M. DOBSON, of New York, U.S.A.
HENRY JOHN PARKER JOLLY St. Mary's Russell Road Ipswich Commercial
Traveller 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 that class of augers for boring wood which are provided
with a spur, and consists of an attachment which though simple greatly increases the
utility and range of work of the auger to which it is applied.
My attachment is intended to facilitate the enlargement of the whole, or a portion
of the length of a hole after it has been bored. This is frequently necessary; and
the absence of any hold for the screw spur at the point of the auger in the act of
reboring, renders it so difficult that it may be called impracticable except by just
filling the small hole by a plug of wood. Even with such filling and its attendant
difficulties there is no assurance that the large auger used for the reboring will be
directed exactly the same as the small one first used, and the result is liable to he
imperfect.
My invention overcomes all difficulties, avoids the necessity for any plugging with

page_text: wood, and any removal of the remainder of such plug after an enlargement of a
portion of the length of a hole, and ensures that the enlargement shall be exactly
concentric to the original small hole. 1 attain this end by providing a block of a size
and form to fit tightly in the small hole. In such block the screw shank of the auger
is engage and as the large anger of the diameter required to produce the enlarged
hole is inserted and revolved the smooth round block travels ahead of it in the same
small hole and keeps it exactly guided. In what 1 esteem the most complete form of
the invention the block is of soft metal near its axis and is prepared beforehand
with a tapering hole without threads and the hole is afterwards threaded by the
introduction of the screw spur of the larger auger. This ensures that the block
shall accurately match the large auger on which it is used. But if care is taken to
make the screw spur of a certain size and pitch the block may be previously threaded
to an exact corresponding condition. I propose to provide each tool chest with a set
of my blocks one or more for each size of small auger usel.
The term "pilot" may be applied to my block as indicating its function of guiding
accurately the centre of the large anger.
The accompanying drawings form a part of this Specification and represent what
I consider the best means of carrying out my invention.
Fig. 1. is an elevation of a portion of an auger equipped with my attachment in
operation. The timber is shewn in section.
The remaining figures show the block or "pilot" detached.
Fig. 2. is a central vertical section it shows the block before the screw threads are
formed.
Fig. 3. is a corresponding view showing the completed block.
Fig. 4. is a plan or top view of the same.
Figs. 5.& 6 are vertical central sections: they show modified forms of the
invention.
Similar letters of reference indicate corresponding parts in all the figures where
they occur.
A is the "twist" and a the screw-spur of an ordinary screw-auger.
It will be understood that the twist has the diameter of the enlarged hole to be
bored & that the auger has the usual provisions, lips, &c. for cutting away the wood
as it advances and making a clean cut cylindrical hole.
B is a round block of less diameter engaged on the screw spur a.
When the
block B is removed the auger A a may be used in the usual manner to bore fresh
holes in wood and analogous material.
When block B is applied and screwed tightly on the spur a the auger thus pro-
vided with a round smooth surface block to precede it is ready to be used to enlarge
a previously formed hole. The block B should be of the same diameter as the
previously formed hole or only a little less, so that as the auger with the attachment
is turned the smooth round block B will traverse the previously formed smaller hole
and keep it exactly centered.
Referring to Fig. 3 B¹ is a soft metal interior of the block B adapted to receive
and be shaped by the screw spur a. This soft metal interior is cast within a pre-
viously tinned rim of brass or other soft metal. It is formed originally with a
smooth tapering hole. When the screw-spur a is introduced it causes its exterior
to conform thereto. The conformation may if found expedient be made very com-
plete by forcibly turning the block upon the spur by the aid of pipe tongs or the like
before the auger thus equipped is used.
Fig. 5. shows a still larger proportion of the block soft metal. In this form the
hard brass is a thin shell forming nearly the entire exterior, not only the cylindrical
or slightly tapered exterior but also both the plane faces. The preferable form for
the exterior in all constructions is a cylinder slightly tapered at the forward end.
Fig. 6 shows the whole block an homogenous metal. It may be entirely brass or
iron or steel threaded by the insertion of a taper top or by other means to match the
screw spur on which it is to be used. It may be entirely a soft metal. In the latter
case the hole is preferably threaded before-hand but it may be used with some

page_text: success with a smooth conical hole allowing the threads to be formed by the screw-
spur itself as described for Figures 3 and 4. In general when the blocks are furnished
with the augers the threads of the augers being known I prefer to provide the
blocks with corresponding threads, but when the blocks are furnished to be used with
any augers 1 prefer to have the hole in the interior of the block tapered and smooth
and the metal soft enough to take the impression of the threads of any spur. I pro-
vide notches or grooves on the periphery of the block B to facilitate screwing the
block firmly upon the spur a.
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
10. The round block B having a tapered hole and a slightly tapered exterior,
adapted to match on a screw auger of larger diameter and to serve therewith as
specified.
2°. The combination of a screw auger A, a for boring wood and a round block B
of less diameter provided with a hole adapted to be fitted on the tapering screw point a
so as to be readily applied and removed as herein specified.
Dated this
day of
1900
HENRY JOHN PARKER JOLLY.