Improvements in Pattern and Box Ohains for the American Type of Weaving Loom.
Year: 1891

page_text: Date of Application, 24th Oct., 1891
Complete Specification Left, 22nd Aug., 1892-Accepted, 24th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in Pattern and Box Ohains for the American Type of
Weaving Loom.
We, EDWIN BOTTOMLEY, of Woodlands, Farsley near Leeds in the County
of York, Manager, JOSEPH JOHN GRIMSHAW, of Greaves Terrace, Farsley
aforesaid, Loom Tuner, and IRWIN BROOK, of Kirkless House, Farsley aforesaid,
Designer, do hereby declare the nature of this invention to be as follows:-
-
This invention relates to improvements in the pattern and box chains for the
dobbies of what is known as the American loom in which the chains are formed of
a number of parallel steel rods linked together by thin side links. We find in this
arrangement considerable trouble and inconvenience arises, as the friction between
the said links and rods rapidly cuts the rods and also enlarges the eyes in the links
to such an extent that the pitch of the chain is made longer as well as irregular and
consequently the action of the shedding and box mechanism is more or less dis-
organized,
We obviate this by employing comparatively stout side links preferably having
a bearing surface in the eyes for the rods approximately the diameter of the rods
and the body of the links is twice the width of the ends where such eyes are formed
so that when the links are made into a chain they form one continuous line with
the eyes of the neighbouring links side by side. And the body of each of the
links is made with a hollow recess, so as to resemble a pitch chain when the links
are connected together, to engage the teeth or projections usually formed on the
chain cylinder.
This arrangement besides forming a more durable chain greatly increases the
accuracy of its motion as, instead of relying upon the preceding rod and link to
bring the rods successively into position, the links themselves engage the chain
cylinder and thus move with greater precision.
Dated this 23rd October 1891.
DRACUP & NOWELL,
Bradford, Agents.
COMPLETE SPECIFICATION.
Improvements in Pattern and Box Chains for the American Type of
Weaving Loom.
We, EDWIN BOTTOMLEY, of Woodlands, Farsley near Leeds, in the County
of York, Manager, JOSEPH JOHN GRIMSHAW, of Greeves Terrace, Farsley
aforesaid, Loom Tuner, and IRWIN BROOK, of Kirkless House, Farsley aforesaid,
Designer, do hereby declare the nature of this invention and in what inanner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
This invention relates to improvements in the pattern and box chains for
the dobbies of what is known as the American loom in which the chains are
formed of a number of parallel steel rods linked together by thin side links. We
find in this arrangement considerable trouble and inconvenience arises, as the
friction between the said links and rods rapidly cuts the rods and also enlarges
the eyes of the links to such an extent that the pitch of the chain is much longer
as well as irregular and consequently the action of the shedding and box mechanism
is more or less disorganized.
We obviate this by employing comparatively stout side links preferably having

page_text: a bearing surface in the eyes for the rods approximately the diameter of the rods
and the body of the links is twice the width of the ends where such eyes are formed
so that when the links are made into a chain they form one continuous line with
the eyes of the neighbouring links side by side. And the body of each of the
links is made with a hollow recess, so as to resemble a pitch chain when the links
are connected together, to engage the teeth or projections usually formed on the
chain cylinder.
This arrangement besides forming a more durable chain greatly increases the
accuracy of its motion as, instead of relying upon the preceding rod and link to
bring the rods successively into position, the links themselves engage the teeth of
the chain cylinder and thus move with greater precision.
Reference is to be had to the accompanying sheet of drawings forming a part of
this Specification in which similar letters of reference indicate corresponding parts
in each of the figures.
Figure 1, represents a side view of three links of our improved chain.
Figure 2, is a plan view of the same.
Figure 3, is a view of the under side of the chain.
Figure 4, is an inside view of Figure 1.
Figure 5, is a cross section of one of the links, and
Figure 6, is a plan view of two of the links shown separate.
The rods A upon which the pattern rollers and spacing pieces-not shown in the
drawings are mounted in the usual manner are shown broken off and are of the
ordinary construction. The links B are each formed with a recess C adapted to
engage the teeth of the chain cylinder and they have lugs D at each end through
which the ends of the rods A are passed. The lugs D are only half the width of
the links so that the links may be arranged in line and the pins E passed through
the ends of the rods keep them in position in the ordinary way.
By the above construction the link besides having a comparatively broad bearing
on the rods directly engage the teeth of the pattern chain and this is effected
without encroaching on the space for the pattern rollers or necessitating any
increase in the length of the rods.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed we declare that what we
claim is :
The improved construction of pattern chain and box chain for weaving looms in
which the chain rods are connected by links having connecting lugs which pass
between the teeth of the chain cylinder, and recesses in the links to engage the said
teeth, substantially as herein shown and described.
Dated this 18th day of August 1892.
DRACUP & NOWELL,
Bradford, Agents.