Improvements connected with Chain Mortising Machines
Year: 1897

page_text: "
PROVISIONAL SPECIFICATION.
Improvements connected with Chain Mortising Machines."
We, DENIS PARRY of 38 Spencer Road, Herne Hill, in the County of Surrey,
Engineer, and JOHN MAGRATH KELLY of 20 Cheapside, in the City of London,
Merchant, do hereby declare the nature of this invention to be as follows:-
In specification to Letters Patent No. 15072 of 1893 is described among other
features a chain for chain mortising machines which it is the object of the present
invention to improve.
In a chain constructed according to the present invention we prefer to employ
a connecting link which is composed of two parts secured together by a central
rivet, and which has in place of pins or rivets at each end to serve as the connect-
ing means for the adjacent links to work on, a reduced portion or stud formed out
of the metal of the link at each end of each part so that when the link is put
together and secured by the rivet the studs will meet in the holes of the adjacent
links which will thus be attached thereto. By forming the links in this way a
smaller one can be employed than if a rivet or pin were to be placed through the
ends of same, as there is no necessity to allow a certain thickness of wall around
the pin to give it the desired strength, while the construction also enables a link to
be easily inserted in or removed from the chain.
In the specification before referred to the faces of the links which immediately
preceded the cutter links were provided with a fence or guard to regulate the
depth of cut, and in the present instance this is provided by curving or humping
the link (which may be the divided link above referred to) such curvature of link
serving both as the fence on the upper face and on the underside affording a
curved surface which assists it in travelling round the rollers or pulleys, and
enables smaller ones to be used. This curvature may be obtained by using metal
of kidney section. Next to the link such as above described may be employed a
link of Tee section having a cutting edge on the head, and this it is proposed to
make in two parts rivetted centrally together, and for this purpo. e it is preferred
to stamp such parts or halves out of sheet steel with a flange which is afterwards
bent down and sharpened to form the Tee shaped head. In front of this cutter
link may be a humped divided link again, then a plain connecting link if
desired or a plain link having a tooth on its face which removes material which
is left by the central opening formed in the bending down process of making the
Tee shaped cutter. After this may come a further humped connecting link, and
so on, though the arrangement of the chain may be varied as desired.
Dated the 10th day of February 1897.

page_text: improvements connected with Chain Mortising machines.
We, DENIS PARRY, of 38 Spencer Road, Herne Hill, in the County of Surrey,
Engineer, and JOHN MAGRATII KELLY, of 20 Cheapside, in the City of London,
Merchant, 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 specification to Letters Patent No. 15072 of 1893 is described among other
features a chain for chain mortising machines which it is the object of the present
invention to improve.
In a chain constructed according to the present invention we prefer to employ
a connecting link which is composed of two parts secured together by a central
rivet, and which has in place of pins or rivets at each end to serve as the connect-
ing means for the adjacent links to work on, a reduced portion or stud formed out
of the metal of the link at each end of each part so that when the link is put
together and secured by the rivet the studs will meet in the holes of the adjacent
links which will thus be attached thereto. By forming the links in this way a
smaller one can be employed than if rivet or pin were to be placed through the
ends of same, as there is no necessity to allow a certain thickness of wall around
the pin to give it the desired strength, while the construction also enables a link to
Le easily inserted in or removed from the chain.
In the specification before referred to the faces of the links which immediately
preceded the cutter links were provided with a fence or guard to regulate the
depth of cut, and in the present instance this is provided by curving or humping
the link (which may be the divided link above referred to) such curvature of link
serving both as the fence on the upper face and on the underside affording a
curved surface which assists it in travelling round the rollers or pulleys, and
enables smaller ones to be used. This curvature may be obtained by using metal
of kidney section. Next to the link such as above described may be employed a
link of Tee section having a cutting edge on the head, and this it is proposed to
make in two parts rivetted centrally together, and for this purpose it is preferred
to stamp such parts or halves out of sheet steel with a flange which is afterwards
bent down and sharpened to form the Tee shaped head. In front of this cutter
link may be a humped divided link again, then a plain connecting link if
desired or a plain link having a tooth on its face which removes material which
is left by the central opening formed in the bending down process of making the
Tee shaped cutter. After this may come a further humped connecting link, and
so on, though the arrangement in the chain may be varied as desired.
To clearly explain the nature of our invention reference is made to the accom-
panying drawings in which
Fig. 1 is a side view of a sufficient portion of a chain to illustrate our invention.
Fig. 2 is a front view of same.
Fig. 3 is a rear view.
Fig. 4 is a side view of one part of a connecting link.
Fig. 5 is a section of same on line
(Fig. 4).
Fig. 6 is a side elevation of a single toothed cutting link.
Fig. 7 is a section of same on line y-y (Fig. 6).
Fig. 8 is a side view of a part of a divided cutter during one stage of its
manufacture.
Fig. 9 is a side view of the completed link and
Fig. 10 is a cross section on line of iki 9

page_text: The chain may consist of various links and arrangements of same. In Fig. 1
is shown one arrangement. The chain here consists of a divided connecting
link A a plain solid link B another divided link A a solid cutter link C a further
link A and a divided cutter link D.
The link A is formed in halves as shown in detail in Figs. 4 and 5 each half
consisting of a body portion a through which is a central opening b and two
studs c c which are formed by cutting or milling away the metal so as to leave
the space d around same the stud being thus produced from the solid metal of the
body portion.
"
This body portion is preferably curved or humped as shown, and is formed by
cutting sections from a bar of what is known as 'kidney" section metal. The
hump e thus present on the face is arranged to be at about the same level as the
cutters on the preceding links and acts as a fence or guard for the cutter of the
link following just behind in the course of the travel of the chain and renders
unnecessary the employment of the special shaped fence or guard described in the
specification before referred to. This face acts like the shoulder at the mouth of
a plane and prevents the cutter entering too deep into the wood. The fence is
inore particularly desirable for use in front of the wide faced cutter hereafter
described but it also serves the same purpose in front of the narrow cutter such
as C. When the two parts of the link are placed together the studs cc abut and
form a pin or pivot for the link next in order the two parts are then secured
together by a central pin or rivet f which passes through the hole b. By driving
out this pin the link may be at once divided and the chain broken or opened.
By forming the studs out of the solid metal instead of using a loose pin I am
enabled to employ a smaller link as with a loose pin, a certain thickness must be
allowed for the wall around the opening which would in the ordinary course be
formed at each end of the link, while with a stud formed as described the thickness
may be very much less and the link may thus be reduced in size with the result
that the chain will travel around a suitable pulley or roller and thus a mortise
of a smaller size may be made.
The plain link B may be simply a piece or length of metal of any suitable shape
which may be used to space out the chain as desired.
The single cutter link C has an angular tooth 9 on its face and holes h h at its
ends with which engage the studs of the divided links A. The tooth g relieves
the wide face cutter 1 hereafter described of some of the work and also cuts away
a portion of the material in the centre which portion the construction of the
cutter D prevents it from attacking.
The cutter D is preferably produced from sheet steel of suitable thickness a
piece being stamped out as shown in Fig. 8 having a wing or projection h which is
bent down by a subsequent process to form a flange or cutter blade h¹ and sharp-
ened on the line the link so formed being punched with the holes j j for the
studs c of the connecting links and with a central hole k for a pin or rivet which
connects the halves. This constitutes a cheap and economical method of forming
the shaped cutter described in the specification above referred to as it is pro-
duced with the exception of the cutting edge entirely by stamping.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed we declare that what we
claim is:
1. In a chain for chain mortising machines, a link composed of parts each
part having a stud at either end, formed out of the metal of the part, and project-
ing inwardly, recesses or gaps around same, and a hole for a pin or rivet through
the main or body portion, the parts being so formed that when put together the
studs of one part abut against the studs of the other as do also the main parts
forming the body portion, substantially as described.
2. In a chain for chain mortising machines, a link composed of parts each part
having a curved or humped face and a stud at either end at right angles to the

page_text: face, said stud being formed out of the metal of the parts and projecting inwardly,
recesses or gaps around same and a hole for a pin or rivet through the main or
body portion, the studs and body portion of one part being adapted to abut against
those of the other, and a link provided with a cutter on its face with which link
the studs of the divided link are adapted to engage, the curved face of the latter
acting as a fence or guard for the cutter, substantially as described.
3. In a chain for chain mortising machines, a T-shaped cutter link composed
of two pieces of metal having flanges at right angles to same sharpened to form the
cutters, the body portions of said pieces abutting and having holes at either end
for connecting the link up in the chain, a central hole, and a pin or rivet secured
in same to hold the two parts firmly together, substantially as described.
4. The improved divided link for chain mortising machines substantially as
described and illustrated in the drawings.
Dated the 16th dow of Dotabon 1007
PHILIP M. JUSTICE
55 & 56 Chancery Lane, London, Chartered Patent Agent
For the Applicants.