Improvements in the Manufacture of Twist Lace Machine Carriages.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Twist Lace Machine Carriages.
We, ERNEST JARDINE, of Deering Street, Lace Machine Builder, and HARRY
LAMBERT, of Seely Road, Comb Maker, both in the City of Nottingham, do hereby
declare the nature of this invention to be as follows:-
This invention relates to the manufacture of twist lace machine carriages, and
more particularly to the bevelling, or what is more commonly termed the cham-
fering of the edges of such carriages, so that they will pass through the threads
without injuring them, and it has for its object, means for effecting this opera-
tion in a more expeditious, economical, and perfect manner than heretofore.
Heretofore in the manufacture of lace machine carriages, their edges have
been chamfered, partially by milling or other suitable machines, and the remain-
ing parts by hand, by means of files, emery paper, or the like.
Owing however to the irregular outline of such carriages, and especially those
provided with teeth or projections to engage with toothed rollers or locker bars,
the amount of chamfering that it has hitherto been possible to effect by machinery
has been extremely limited, and an excessive amount of hand work has therefore
been entailed in this process.
According to our invention we bevel or chamfer any part of the edge of a
carriage, on either one or both sides, by means of suitably formed dies, placed in
a press or drop stamping machine, and thus squeeze or stamp a bevel edge
thereon.
We may by means of a suitably shaped top and bottom die, chamfer the whole
of a carriage at one operation, or use one plain die, and one chamfer die, and
first chamfer one side, and then reverse it and chamfer the other, or we may
chamfer different parts of the carriage at different operations, using specially
formed dies for each operation.
The dies are preferably formed with a sunk part, having in most cases an
outline coinciding with that of the carriage, or that part which the die is intended
to chamfer, the fall from the raised part to the sunk part, being made on the
same bevel it is desired to impart to the edge of the carriage.
The sunk part of the die is also cut away so that it does not bear on the face
of the carriage, and the whole of the pressure is thus exerted by the bevel part
of the die, on the edge of the carriage, and the latter is forced into the requisite
form.
The angle of the chamfer is determined by the angle of the bevel part of the
die, and dies for chamfering different parts of a carriage, may be so disposed
as to give chamfers of different angles, or of more or less extent.
The same result may however be obtained by a single die, in which the angle

page_text: of the bevel part is of different angles, at different parts of the outline of the
die.
In some cases it may be necessary to use a plain die of the same configuration
as the carriage, or part of the carriage, in order to force the said carriage into
the chamfer die.
By means of dies constructed as described, any part of the edge of a carriage
may be chamfered, this operation may also be performed expeditiously and
accurately, the extent of the chamfer, and its angle being identical in every
which is impossible to attain with hand work, in which the chamfer is
judged by the eye of the operator.
case,
The edges of a carriage may be bevelled as described at any part of the process
of manufacture, but preferably before the said edges have been trued up, as
the latter process will remove the burr raised by the dies.
Dated this 19th day of December 1899.
BOULT, WADE & KILBURN,
Agents for the Applicants.
Improvements in the Manufacture of Twist Lace Machine Carriages.
We, ERNEST JARDINE, of Deering Street, Lace Machine Builder, and HARRY
LAMBERT, of 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 follow-
ing statement:-
This invention relates to the manufacture of twist lace machine carriages, and
more particularly to the bevelling, or what is more commonly termed the cham-
fering of the edges of such carriages, so that they will pass through the threads
without injuring them. It has for its object the performance of this operation
in a more expeditious, economical and perfect manner than heretofore."
Heretofore in the manufacture of lace machine carriages, their edges have
been chamfered partly by milling or other suitable machines, and partly by
hand, by means of files, emery paper, or the like.
Owing however to the irregular outline of such carriages, and especially those
provided with teeth or projections to engage with toothed rollers or locker bars,
the amount of chamfering that it has hitherto been possible to effect by machinery
has been extremely limited, and an excessive amount of hand work has therefore
been entailed in this process.
Our invention will be best understood by reference to the accompanying draw-
ings in which,
Fig. 1 is a face view, and
Fig. 2 an edge view of a carriage blank.
Fig. 3 is a face view, and
Fig. 4 an edge view of a finished carriage.
Fig. 5 is a plan, and
Fig. 6 an end elevation of a die for chamfering the teeth of a carriage, and
the support for the same.
Fig. is a vertical cross section of the die, taken on the line X X of Fig. 5;
Fig. 8 is a plan of a die for chamfering the whole of a carriage.
Fig. 9 is a vertical cross section of the die taken on the line Y Y of Fig. 8.
Like letters indicate like parts throughout the drawings.

page_text: According to our invention we bevel or chamfer any part of the edge of a
carriage, on either one or both sides, by means of suitably formed dies, placed
in a press or drop stamping machine, and thus squeeze or stamp a bevel edge
thereon, instead of removing the edge by cutting or abrading tools.
In making a carriage we take a carriage blank A (see Figs. 1 and 2) which is
punched the requisite shape from sheet metal, and then first proceed to bevel
the edges of the blank in the manner described.
By reference to the finished carriages shown in Figs. 3 and 4, will be seen
that the teeth B are chamfered on both sides at B, and that the sides of the
carriage are also chamfered at C.
We may first chamfer the teeth B of the carriage, and then the sides C by a
subsequent operation, or chamfer the whole at one operation as preferred.
We may also chamfer only one side at once, or both sides simultaneously.
In order to chamfer the teeth B, we employ a die which is formed with a
raised part 1 (see Figs. 5, 6 and 7) and with sunk parts 1', the latter being
cut away so as to leave the raised part I) with an outline or edge 12 which in
plan corresponds to the outline of the teeth B or that part of the edge of the
carriage it is designed to chamfer, but is the reverse thereof. This edge D2 of
the raised part I) is bevelled off as shown to the same angle it is desired to
impart to the edge of the carriage.
The die D is carried in a bolster E and is secured therein by means of screws F,
which latter also provide a means of adjusting the die in the bolster. The latter
is also provided with two lugs E¹ either secured to or formed integrally with
the bolster.
The carriage blank is placed between the two lugs E with the edge of its
teeth resting on the bevelld edge 12 of the raised part 1), of the die, and is
then forced into the said die by the top die. If the carriage is to be chamfered
on both sides simultaneously, the top die is precisely the same as and registers
with the bottom die.
The carriage blank is held in the proper position relatively to the dies, and
is also prevented from being forced out of said dies, by the lugs E¹ on the bolster
previously described. It will also be understood that the bevelled edge 12 of
the raised part 1) of the die is the part which forms the chamfer on the carriage
blank and is the only part that exherts any pressure thereon, the sunk part D¹
being entirely cut away so as to be quite clear of the face of the carriage
blank.
In order to chamfer the whole of a carriage blank simultaneously, we use a
die such as that shown in Figs. 8 and 9.
This die is formed with a raised part F and a sunk part I the inner edge of
the former of which is approximately of the same shape or outline as the
carriage but the reverse thereof, and the edges F2 of this raised part are
bevelled all round as shown.
The bevelled part F¹ of the edge of the raised part 1 chamfers the teeth B
of the carriage in the same manner as the die previously described, whilst the
bevelled parts 2 chamfer the sides C.
The carriage blank is held in position by the registering pins G, which engage
with holes H formed in the carriage blank.
When this die is employed the carriage blanks are preferably chamfered
before the middle portion is punched out.
When the teeth of a carriage blank are first chamfered in a separate die such
as 1), the sides may be chamfered in a die provided only with raised parts having
bevelled edges F2 (see Fig. 8).
By means of dies constructed as described, any parts of the edge of a carriage
may be chamfered, this operation may also be performed expeditiously and
accurately, the extent of its chamfer and its angle being identical in every case.
which is impossible to attain with hand work, in which the chamfer is judged
solely by the eye of the operator.

page_text: Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is:-
1. Chamfering a twist lace machine carriage by compression between dies sub-
stantially as described.
2. Chamfering the teeth B of a twist lace machine carriage by means of a
die such as substantially as described.
3. Chamfering the teeth B and sides C of a twist lace machine carriage by
means of a die such as F substantially as described.
4. Chamfering twist lace machine carriages by compression in dies sub-
stantially as described and illustrated in the accompanying drawings.
Dated this 17th day of Sentomber 1900
ERNEST JARDINE.
HARRY LAMBERT.
Boult, Wade & Kilburn,
Agents for the Applicants.