IMPROVEMENTS IN THE MANUFACTURE OF CUTLERY AND TOOLS
Year: 1882

page_text: LETTERS PATENT to David Hummel Junior of 7, Fenchurch Street in the
City of London for an Invention of "IMPROVEMENTS IN THE MANUFACTURE
OF CUTLERY AND TOOLS" Communicated to him from abroad by Hadar
Hallström of the City of Eskilstuna, Sweden.
PROVISIONAL SPECIFICATION left by the said David Hummel, Junior,
at the Office of the Commissioners of Patents on the 9th August 1882.
DAVID HUMMEL Junior of 7, Fenchurch Street in the City of London
"IMPROVEMENTS IN THE MANUFACTURE OF CUTLERY AND TOOLS." (A com-
munication to me from abroad by Hadar Hallström of the City of Eskilstuna,
Sweden)
The object of this invention is to manufacture articles of cutlery and tools and
the like with hollow handles, all in one piece, of iron or steel, thus producing an
article of great lightness, strength and durability combined with economy.
For the purpose of forming a table knife according to this invention the
operation is as follows:-Two blanks of iron or steel are cut off and rolled or
otherwise formed to size, the larger of the two blanks is of a length and size
suitable for the blade and half the hollow handle while the other or smaller blank
is of a size suitable for the other half of the hollow handle.
The short blank is hollowed or recessed down in suitable dies to the required
form leaving a flanged part on each side and on the end. Similarly one end of
the larger blank is recessed down in dies so as to correspond with the aforesaid
short blank.
To facilitate the next or welding process, wherein the two blanks are welded
together the recessed halves or handle parts are not made of the same depth, but
the larger piece or the blank in one with the blade is made deeper, so that the
upper side of the trough shaped handle is level or nearly so with the face of the
blade, thus leaving as much metal as possible where the weld on the blade is to be.
The other half of the handle is thinner, or say, about half as thick as the handle

page_text: is to be. A surplus of thickness required for the compression of the metal at the
welding blow is thus obtained and the thin metal of the shorter piece just over the
place of welding on the blade will flow or melt more readily thus leaving the blade
less injured by the heat.
The blanks may be single or double as is well known in the manufacture of
cutlery, but single dies are preferable.
The two blanks formed as described and of which one ought to be right and
the other lefthanded are then placed upon each other and if necessary joined
together by a small rivet or thin wire. The handle parts are now raised to a
proper welding heat and placed between forming or finishing dies and welded
together by one blow of the hammer. After being subjected to the finishing
operations of grinding, polishing and plating in the ordinary manner the knife is
ready for sale and use.
It is evident that the operation may be modified by forming the two halves of
the handle separately and by simultaneously welding the blade in between them.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said David Hummel, Junior, in the Great Seal Patent Office on the
9th February 1883.
"
DAVID HUMMEL Junior of 7 Fenchurch Street in the City of London
"IMPROVEMENTS IN THE MANUFACTURE OF CUTLERY AND TOOLS
A com-
munication to me from abroad by Hadar Hallström of the City of Eskilstuna
Sweden
The object of this invention is to manufacture articles of cuttlery and tools
and the like with hollow handles all in one piece, of iron or steel, thus producing
an article of great lightness, strength and durability combined with economy.
For the purpose of forming a table knife according to this invention the
operation is as follows Two blanks of iron or steel are cut off and rolled or other-
wise formed to size the larger of the two blanks is of a length and size suitable for
the blade and half the hollow handle while the other or smaller blank is of a size
suitable for the other half of the hollow handle.
The short blank is hollowed or recessed down in suitable dies to the required
form leaving a flanged part on each side and on the end similarly one end of the
larger blank is recessed down in dies so as to correspond with the aforesaid short
blank.
To facilitate the next or welding process, wherein the two blanks are welded
together the recessed halves or handle parts are not made of the same depth but
the larger piece or the blank in one with the blade is made deeper, so that the
upper side of the trough shaped handle is level or nearly so with the face of the
blade, thus leaving as much metal as possible where the weld on the blade is to be.
The other half of the handle is thinner or say about half as thick as the handle
is to be. A surplus of thickness required for the compression of the metal at the
welding blow is thus obtained and the thin metal of the shorter piece just over the
place of welding on the blade will flow or melt more readily thus leaving the blade
less injured by the heat.
The blanks may be single or double as is well known in the manufacture of
cutlery, but single dies are preferable.
The two blanks formed as described and of which one ought to be right and the
other lefthanded are then placed upon each other and if necessary joined together
by a small rivet or thin wire. The handle parts are now raised to a proper
welding heat and placed between forming or finishing dies and welded together by
one blow of the hammer. After being subjected to the finishing operations of
grinding polishing and plating in the ordinary manner the knife is ready for
sale and use,
It is evident that the operation may be modified by forming the two halves of
the handle separately and by simultaneously welding the blade in between them.
To enable those skilled in the art to carry this invention into effect I shall
proceed to describe the manufacture of a table knife referring to the accompanying
drawings in which, Figures 1 and 5 are plans of the two different blanks to be
used, Figures 2 and 3 longitudinal and transverse sections respectively through the
dies in which the blank Figure 1 is hollowed down Figure 4 a plan of the same
blank after being formed. Figures 6 and 7 are longitudinal and transverse sections
respectively through the dies, wherein the larger blank (Figure 5) is formed
Figure 8 shows the same blank after being formed. Figures 9 and 10 are
longitudinal and transverse sections through the dies wherein the two blanks are
welded together. Figure 11 is a view of the finished knife.
The operation of forming a knife is as follows:-
A rectangular blank Figure 1 of iron or steel is cut off and rolled to size and

page_text: hollowed down in the dies A and B After being pressed out as the dotted lines
Figure 4 indicate the one half of the handle is ready for welding.
The other blank Figure 5. is treated in the same manner that is to say cut
off rolled, upset. between the dies C and D and pressed out to the dotted lines
Figure 8.
In the drawing the blanks are represented as single blanks but as in the
manufacture of table cuttlery the blanks generally are used double, the dies may if
desired be made double to suit this kind of blanks but I consider it better to
divide them before stamping and to use single dies.
The two blanks formed as above described and of which one ought to be right
and the other left handed to fit together are then placed upon each other and if
necessary joined together with a small rivet or a thin wire, the handle part is
raised to a proper welding heat in a furnace and placed between the forming dies E
and F when a blow of the hammer head in the place where the upper die is
After being
inserted will complete the welding together of the two pieces to one.
subjected to the finishing operations of grinding polishing and plating in the
ordinary manner the knife is ready for sale and use.
It is evident that the operation can be modified so that both the two halves of
the handle are formed of short blanks such as shown at Figure 1 and the blade
simultaneously welded in between them, also that the form and design of the handle
and article can be varied in any desired manner.
Having thus described and ascertained the nature of this Invention and the
manner of carrying the same into effect I declare that I do not claim generally the
inode of shaping the handel parts of a knife as that has been done long ago both
for rivetting and for soldering the two pieces together nor do I limit myself to
the precise details herein before described and shown as the same may be varied
without departing from the nature of this Invention but I claimi
:-
Firstly In the manufacture of table cutlery and tools the method of welding
together the handle parts of such articles said parts consisting of two pieces of
iron or steel or other weldable material made with raised edged parts and of which
one piece may be in one with the blade all substantially as described.
Secondly: As a new article of manufacture a knife or other piece of cutlery
having the handle hollow and of parts welded together and to or with the blade
substantially as set forth
In witness whereof I the said David Hummel have hereunto set my hand
and seal this second day of February in the year of Our Lord One thousand
eight hundred and eighty three.
D. HUMMEL JR. (L.S.)