Improvements in the Cutting Links of Mortising Machine Chains.
Year: 1899

page_text: Date of Application, 7th Jan., 1899
Complete Specification Left, 19th Sept., 1899—Accepted, 11th Nov., 1899
PROVISIONAL SPECIFICATION.
Improvements in the Cutting Links of Mortising Machine Chains.
I, EDWARD SMITH HIGGINS, of 33, Comyn Road, Wandsworth Common,
London, S.W., Engineer, do hereby declare the nature of this invention to be as
follows:-
It has heretofore been proposed to make the outer cutting links of mortising
machine chains of two parts cut from solid metal or bent up from sheet metal
and to rivet these parts together.
According to the present invention it is proposed to so make the links out of
comparatively thin metal so as to adapt them for cutting of narrow mortises and
for wider cutters between the two halves or portions of the links to insert packing
pieces of the same shape as the link below the cutter. Thus the cutters adapted
for a narrow mortise are equally applicable for wider mortises after the packing
pieces have been inserted and they have the advantage of leaving ample clearance
between the cutting faces and the fence links. The centre cutter is of course
made to correspond with the space between the halves of the main or outer
cutters.
Improvements in the Outting Links of Mortising Machine Chains.
I, EDWARD SMITH HIGGINS, of 33, Comyn Road, Wandsworth Common,
London, S.W., Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
:-
It has heretofore been proposed to make the outer cutting links of mortising
machine chains of two parts cut from solid metal or bent up from sheet metal
and to rivet these parts together.
According to the present invention it is proposed to so make the links but of
comparatively thin metal so as to adapt them for the cutting of narrow mortises and
for wider cutters, between the two halves or portions of the links to insert packing
pieces of the same shape as the link below the cutter. Thus the cutters adapted
for a narrow mortise are equally applicable for wider mortises after the packing

page_text: pieces have been inserted and they have the advantage of leaving ample clearance
between the cutting faces and the fence links.
My invention is illustrated in the accompanying drawing which shews one form
of chain having my improvements applied thereto. In these drawings
Fig. 1 is an elevation shewing a few links of a chain.
Fig. 2 is a plan of same.
Fig. 3 is an end elevation of the parts (separated) forming the improved
cutting link above referred to, the parts being shewn as including the packing
or distance pieces and being on a larger scale than Figs. 1 and 2.
Fig. 4 is a similar view with the parts put together.
Fig. 5 is a plan of Fig. 4.
Fig. 6 is a side elevation of the links, and
Fig. 7 is a similar view to Fig. 4 but with the packing or distance piece
dispensed with.
The complete chain as shewn in Figs. 1 and 2 consists of the outer cutting
link a the fence or guard links 66 and the inner or centre cutting link call
arranged as is usual in chains of this class. Figs. 3 to 7 shew the described
construction of the outer cutting link a, from which it will be seen that the
outer halves d d are formed of thin metal, the cutting ears d¹ being bent out-
wardly from same. Each part has holes e e formed in same through which
the rivet pins of the guard links b b pass.
In Figs. 3, 4 and 5 will be seen the packing or distance piece f by which the
parts & are separated so as to form a link of the desired width, such piece f
having holes corresponding to the holes e; and in Fig. 7 it will be seen that the
distance piece is dispensed with, the two parts d d being placed close together
so as to form a narrow link.
The inner or centre cutting link is of course made to correspond with the
space between the parts d d of the cutter a.
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. A cutting link for a mortise chain formed of two parts of thin metal and
a packing or distance piece between same substantially as and for the purpose
described.
2. A cutting link for a mortise chain constructed substantially as described
and illustrated.
illustrated.
Dated the 18th day of September 1899.
PHILIP M. JUSTICE,
55 and 56, Chancery Lane, London, Chartered Patent Agent,
For the Applicant.