Year: 1898

page_text: I, EDWARD SMITH HIGGINS, of 33, Comyn Road, Wandsworth Common, London,
Engineer, do hereby declare the nature of this invention to be as follows:-
-
In mortising chain cutters as heretofore usually made, it has been customary
to cut each link out of a solid block of metal, and the expense of so manufacturing
has been considerable.
According to this invention, it is proposed that the links should be cut from
sheet metal, which so far as the cutting links are concerned, is then bent and
forged into the required shape, the cutting edges formed thereon, and when
necessary, as is usually the case, the cutters are hardened or tempered.
In order that the invention may be clearly understood, reference is made to
the accompanying drawings in which:-
Fig. 1 represents a piece of sheet metal adapted to form one of the cutting
links.
Fig. 2 is a plan view of same.
Fig. 3 represents the sheet metal after the first bending.
Fig. 4 is a plan view of same.
Fig. 5 represents the sheet metal after the second bending.
Fig. 6 is a plan view of same.
Fig. 7 represents the sheet metal after the third bending and as adapted to
form the central cutting link.
Fig. 8 is a plan view of same.
1
Fig. 9 represents the sheet metal after the fourth bending and as adapted to
form the outer cutting links.
Fig. 10 is a plan view of same.
Fig. 11 is a plan view of several links connected in the order in which a
chain would usually be formed, and
Fig. 12 is a side view of same.
To form a cutting link, the metal is first cut out substantially as indicated in
Figs. 1 and 2, although if a curved following end is not desired, the curved
edges a may be omitted, the stamping then being the same on both sides, the
cars bb are then bent over toward the ears ee and the parts assume the position
shown in Figs. 3 and 4. The cars care then brought into close contact as
indicated in Figs. 5 and 6, after which the head or tube d is flattened down as
indicated in Figs. 7 and 8, when the forward end of d is ready for undercutting
or grinding to form the cutting edge e of a central cutter, while for the outer
cutting links the head d is further acted on so as to produce the shape indicated
in Figs. 9 and 10, in which a groove or clearance space f is indicated, and a
link so formed is then ready for undercutting or grinding, so as to produce the
cutting edges 9 g. The pin or pivot holes being cut, the links are ready for
tempering or hardening in any of the well known ways. It will be noted that

page_text: links so formed have their cutting faces of one solid continuous piece which
extends all across the head.
The fence links h may also be stamped from sheet metal and the links be
secured in order by pins or pivots i.
Dated the 20th day of August 1898
PHILIP M. JUSTICE,
55 and 56, Chancery Lane, London, Chartered Patent Agent,
For the Applicant.
Improvements in the Cutting Links of Mortise Cutting Chains.
I, EDWARD SMITH HIGGINS, of 33, Comyn Road, Wandsworth Common, London,
Engineer, 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:-
In mortising chain cutters as heretofore usually made, it has been customary
to cut each link out of a solid block of metal, and the expense of so manufacturing
has been considerable.
According to this invention, it is proposed that the links should be cut from
sheet metal, which so far as the cutting links are concerned, is then bent and
forged into the required shape, the cutting edges formed thereon, and when
necessary, as is usually the case, the cutters are hardened or tempered.
In order that the invention may be clearly understood, reference is made to
the drawings accompanying the Provisional Specification in which :-
Fig. 1 represents a piece of sheet metal adapted to form one of the cutting
links.
Fig. 2 is a plan view of same.
Fig. 3 represents the sheet metal after the first bending.
Fig. 4 is a plan view of same.
Fig. 5 represents the sheet metal after the second bending.
Fig. 6 is a plan view of same.
Fig. 7 represents the sheet metal after the third bending and as adapted to
form the central cutting link.
Fig. 8 is a plan view of same.
Fig. 9 represents the sheet metal after the fourth bending and as adapted to
form the outer cutting links.
Fig. 10 is a plan view of same.
Fig. 11 is a plan view of several links connected in the order in which a
chain would usually be formed, and
Fig. 12 is a side view of same.
To form a cutting link, the metal is first cut out substantially as indicated in
Figs. 1 and 2, although if a curved following end is not desired, the curved
edges a may be omitted, the stamping then being the same on both sides, the
cars bb are then bent over toward the ears cc and the parts assume the position
shown in Figs. 3 and 4. The ears b c are then brought into close contact as
indicated in Figs. 5 and 6, after which the head or tube d is flattened down as
indicated in Figs. 7 and 8, when the forward end of d is ready for undercutting
or grinding to form the cutting edge e of a central cutter, while for the outer
cutting links the head d is further acted on so as to produce the shape indicated
in Figs. 9 and 10, in which a groove or clearance space f is indicated, and a

page_text: link so formed is then ready for undercutting or grinding, so as to produce the
cutting edges g 9. The pin or pivot holes being cut, the links are ready for
tempering or hardening in any of the well known ways. It will be noted that
links so formed have their cutting faces of one solid continuous piece which
extends all across the head.
The fence links h may also be stamped from sheet metal and the links be
secured in order by pins or pivots i.
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. The manufacture of the cutting links of chain mortising machines from
sheet metal, substantially as described.
2. In the manufacture of the cuting links of chain mortising machines, first
cutting a blank from sheet metal, then bending same so that the opposite
edges come together, then flattening the top and undercutting or grinding
same to form a central cutter, substantially as set forth.
3. In the manufacture of the cutting links of chain mortising machines, first
cutting a blank from sheet metal then bending same so that the opposite edges bc
come together, then flattening the top and forming a groove f therein and
undercutting or grinding same to form an outer cutting link, substantially as
set forth.
4. The improved cutting links for mortising machine chains, substantially as
described.
PHILIP M. JUSTICE,
55 and 56, Chancery Lane, London, Chartered Patent Agent,
For the Applicant.