Improvements in or relating to Combs and Bearers for Twist Lace Machines.
Year: 1897

page_text: Date of Application, 19th July, 1897
Complete Specification Left, 16th Apr., 1898-Accepted, 4th June, 1898
PROVISIONAL SPECIFICATION.
Improvements in or relating to Combs and Bearers for Twist Lace
Machines.
We, ERNEST JARDINE, of Deering Street, Lace Machine Builder, and HARRY
LAMBERT, of 14, Seely Road, Comb Maker, both in the City of Nottingham, do
hereby declare the nature of this invention to be as follows:
1
This invention relates to improvements in what are known as combs and bearers
which carry and support and also form the guides for the carriages of twist lace
machines, and it has for its object the manufacture of such combs and bearers out
of one piece of metal, in a more expeditious and economical manner than heretofore
and also to obtain greater regularity in the gauge when the combs and bearers are
cast in a solid metal foundation in the usual manner.
Heretofore such bearers have been formed by sheet metal blanks of the requisite
shape placed between each comb or by bars of a suitable section placed transversely
to the combs in slots or openings formed in the whole of the said combs or by
forming a comb and bearer out of a piece of metal of the thickness of a comb and
bearer and reducing it at the required parts by grinding or milling tools.
In carrying out our invention we form the combs of sheet metal of the requisite
gauge or thickness in the usual manner and form a bearer or bearers on one side
of each comb as follows:-
Immediately below a circular line on each comb which represents the position of
the lower edge or circle of the carriages, we raise the metal on one side to the
required extent at three or any other convenient number of points along this line
preferably by punching or stamping it up from the other side.
The upper edge of these raised parts correspond to the circular carriage line
referred to and form bearings for the lower edge of said carriages.
In some cases we partially punch slots in the comb that is we actually divide or
cut the metal round the part which is raised by means of a punch but only force
the punched part through the main part the required extent to form a bearing as
described. The face of the raised portions may be subsequently finished and their
height above the face of the comb reduced to the required dimensions by milling
or other suitable tools.
By this means the edge of the raised parts are made perfectly square by the first
operation and thus form a bearing for the edge or circle of the carriage which
requires no subsequent treatment.
-
If preferable we raise up the metal at the required points by stamping or other
convenient means and in this case we may square up the upper edges of the raised
parts which are to form the bearings for the circle of the carriage as well as their
faces by milling or by any other convenient form of cutting tool.
The shape of the raised parts may be varied for different forms of combs but we
preferably make their length greater than their depth and form them with rounded
ends so that the noses of the carriages will not catch them.

page_text: In combs for some kinds of lace machines it may be found necessary to form them
with extensions out of which the metal is raised to form the bearers.
Dated this 19th dox of Tul., 1907
BOULT & WADE,
Agents for the Applicants.
Improvements in or relating to Combs and Bearers for Twist Lace
Machines.
We, ERNEST JARDINE, of Deering Street, Lace Machine Builder, and HARRY
LAMBERT, of 14, Seely Road, Comb Maker, both in the City of Nottingham, 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:
This invention relates to improvements in what are known as combs and bearers
which carry and support and also form the guides for the carriages of twist lace
machines, and it has for its object the manufacture of such combs and bearers out
of one piece of metal plate in a more expeditious and economical manner than
heretofore, and also to obtain greater regularity in the gauge when the combs and
bearers are cast in a solid metal foundation in the usual manner.
Heretofore the bearers have been formed by flat metal blanks of the requisite
shape placed between the combs, which latter are also formed of flat metal blanks,
or by bars of suitable section placed transversely to the combs in slots or openings
formed in the whole of the latter, or by forming a comb and bearer out of a piece
of metal plate of the thickness of a comb and bearer, and reducing that part which
is to form the comb by milling or other suitable tools.
The invention will be best understood by reference to the accompanying draw-
ings, in which.
Fig. 1. is a side view of a comb and bearer manufactured according to our
invention.
Fig. 2 is a vertical cross section taken on line X.X. of Fig. 1.
Fig. 3 is a side view showing the combs cast into a metal foundation.
Fig. 4. is a vertical cross section taken on line Y.Y. of Fig. 3.
Fig. 5. is a side view of a comb and bearer manufactured by an alternative
process, and
Fig. 6. a vertical cross section taken on line Z.Z. of Fig. 5.
Like letters indicate like parts throughout the drawings.
According to our invention we make the combs of sheet metal of the requisite
gauge or thickness in the usual manner, and form a bearer on one side of each
comb by punching or stamping the comb up from the other side at the required
parts.
In Figs. 3 and 4. is shown a comb A which is punched or cut out of a sheet
metal plate; the dotted line B indicates the position of the lower edge or circle of
the carriage relatively to the comb.
The bearer for supporting the edge or circle of the carriage is formed by raising
parts C of the comb on one side, at four or any other convenient number of points
which are below the line B, the position of the said raised parts C being so arranged
that their upper edges coincide with the line B as shown.
In the combs shown in Figs. 1 and 2. the parts C are raised by partially punching
the said parts C out of the comb A, that is, the metal is actually divided round each
11+

page_text: part and the latter are simultaneously forced through the main part of the comb
to the required extent to form the bearer.
In Figs. 4 and 5. the raised parts C are formed by stamping up the said parts
as shown.
The former process is specially applicable to coarse gauge or stout combs, whilst
the latter is applicable to fine gauge or thin combs.
The face of the raised parts C may be subsequently finished and their height
above the face of the comb adjusted by milling or other suitable tools.
The upper edges of the raised parts Con which the carriages are carried may also
be finished by a like process, this is more especially required when the raised
parts C are formed by stamping up the metal as shown in Figs. 4 and 5.
The shape of the raised parts may be varied for different forms of combs, but we
preferably make their length greater than their depth and form them with rounded
ends as shown.
In Figs. 2 and 3 a number of combs A are shown cast into a soft metal founda-
tion D, the mould employed for this purpose is preferably so constructed that the
soft metal will run into the recesses E (see Figs. 2 and 6) formed in the combs by
raising up the parts C.
This not only supports the raised parts C but also fixes the combs more firmly
in the soft metal foundation. .
It may be necessary in some cases in order to obtain this result to form the lower
part of the comb with runners at the required points, on the same side as the
recesses, or to reduce the thickness of the comb below the recesses.
It may be found necessary or advantageous in some cases to form the combs with
extensions or projections beyond the lower edge of the comb, out of which projec-
tions parts such as C are raised to form the bearer in the manner herein before
described.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:-
1. The method of forming a bearer out of a comb by partially punching out of
the said comb a part or parts to form the bearer substantially as described.
2. In combs and bearers for twist lace machines forming each bearer out of the
corresponding comb by partially punching out of the said comb parts such as C at
the requisite points substantially as described.
3. In combs and bearers for twist lace machines forming each bearer out of the
corresponding comb by stamping up a part or parts such as C at the requisite points
substantially as described.
4. A combined comb and bearer for twist lace machines formed out of a single
metal plate substantially as described and illustrated in the accompanying
drawings.
Dated this oth day of April 1898.
ERNEST JARDINE,
HARRY LAMBERT.
Boult & Wade,
'
Agents for the Applicants.