An Improvement in and connected with Chisels, Gouges, Knives, Forks and other Hand Tools.
Year: 1897

page_text: Date of Application, 18th Feb., 1897-Accepted, 20th Mar.. 1897
An Improvement in and connected with Chisels, Gouges, Knives,
Forks, and other Hand Tools.
I SCOTT ADDISON of 35 Ferrers Road Streatham in the County of Surrey
Sanitary Inspector 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 :-
B
The object of this invention is to enable chisels gouges knives forks and the like
to be easily and securely fixed in their handles so that they will not become loose
or turn in the said handles.
Now according to this invention instead of making the tangs of chisels gouges
and other tools tapering as usual I make the said tangs cylindrical or of any other
suitable parallel or prismatic section for the greater portion of their length and
terminate the said tangs in a point.
1 form also a wing fin or projection on one or more sides of the tangs to prevent
rotation of the tools in the handles.
The hole in the handle is bored slightly smaller than the tang and the handle
driven on to the tang with a few blows of a mallet the fin or fins or wings cutting
into the material of the handle and preventing rotation.
As the tang is parallel and not tapered it will not readily become loose in the
handle.
And in order that my said invention may be fully understood I will proceed to
explain the same with reference to the accompanying sheet of drawings in which
Fig. 1 represents elevation of a carpenters chisel constructed according to this
invention.
Fig. 2 is plan of same. .
Fig. 3 shews alternative form of tang.
The same letters denote the same parts in all the figs.
a is the blade of the chisel
b the tang thereof
cc fins or projections on opposite sides of the tang.
d the handle.
:
As will be seen from the drawings the tang bis cylindrical in section instead of
tapering and terminates in a point e. On each side of the tang is a projecting fin
or wing c preferably terminating in a feather edge shewn at Fig. 2. The said fins
are parallel to the tang and may be merged into the point of the tang as shewn at
Fig. 1.
.
The hole in the handle d is bored slightly smaller than the diameter of the
tang band the handle d driven on to the tang with a few blows of a mallet the fin
cutting into the material of which the handle is composed and so preventing
rotation of the tool in the handle.
This method of making tangs is applicable to chisels gouges knives forks
bradawls and other cutting or piercing tools which are fixed in handles of wood or
other soft material.
As the tangs of such tools are parallel and are made a driving fit in the holes in
the handles they are not liable to become loose as is the case with ordinary tapered
tangs and moreover the fins or wings on the tangs prevent rotation of the tool in
the handle more effectually than when a square tang is driven into a round hole.
i Pane xd 1

page_text: The tangs may be formed by drop forging under dies or by any other suitable
means.
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. Forming the tangs of knives forks chisels gouges and the like cylindrical or
of a suitable prismatic section substantially as herein before specified.
2. Forming the tangs of knives forks chisels gouges and the like cylindrical or
prismatic with one or more fins wings or projections thereon preferably on opposite
sides of the said tangs substantially as hereinbefore specified and for the purpose
stated.
3. Tangs for knives forks chisels gouges and the like as shewn by the
accompanying drawings.
Dated this 18th day of February 1897.
T. E. HALFORD,
11 Furnival Street, London, E.C., Applicant's Agent.
T. E. HALFORD,
11 Furnival Street, London, E.C., Applicant's Agent.