Improved Mechanism for Operating the Healds of Looms for Weaving.
Year: 1893

page_text: Date of Application, 9th Dec., 1893
Complete Specification Left, 8th Sept., 1894-Accepted, 13th Oct., 1894
PROVISIONAL SPECIFICATION.
Improved Mechanism for Operating the Healds of Looms for
Weaving.
We JAMES HILL of 35 Ethel Street Keighley in the County of York
Machine Maker and EDWARD HILL of the same place Machine Maker do hereby
declare the nature of this invention to be as follows:-
Our invention relates to the construction of certain parts used in connection with
mechanism for operating the healds of looms for weaving, (said mechanism being
known as dobby mechanism) and consists of forming said parts so that they are
more durable, can be produced cheaper, while at the same time the action of the
mechanism is made more perfect.
This is attained by forming the grates or grids in such a manner that, when
placed in the machine their feet come under the frames of said machine and are
suitably fastened thereto.
The grids or grates are made of cast iron and are arranged in the form of double
grates in such a manner that when fixed in the machine one grate projects
horizontally and the other vertically.
Into the horizontal grates are placed cast iron needles of a suitable shape.
These needles are held in said grates by strips of metal which pass across the
full length of the grates and are suitably fastened thereto while at the same time
said needles have full freedom to work.
The top parts of the needles are formed with flat surfaces upon which rest the
top catches of the machine, said catches pass through the vertical grate and are
prevented from getting away from said needles thereby.
Towards the bottom of the machine and directly under the grid or grate already
referred to, is fixed another grate or grid similarly made and through this the
needles also pass and are thus prevented from getting away from their respective
feelers or indicating levers, while the bottom catches pass through the vertical
grate and are also held in position.
By forming the joints which are fulcrumed to the driving lever at the front of
the machine (said joints being coupled up by suitable rods to the draw bars or knives)
of such a shape as they can be fulcrumed nearer the centre of the driving lever and
also long enough so that the rods which couple said joints to said draw bars or
knives, are drawn in a horizontal manner as heretofore, by these means the draw
bars or knives are drawn a less distance at the front of the machine than at the
back.
Upon the upper side of the draw bars or knives we cast lugs or ribs in such a
manner that when the catches engage with the draw bars or knives there is a lug
or rib on either side of them and by these means we can work the draw bars or
knives a greater distance at the back than the front of the machine without any
fear of the catches slipping sideways as they are held in position by the said ribs
or lugs.
By these means we can get a perfect variable shed or lift in the healds.
Dated this 8th dow of Doomhow 1000
JAMES HILL.
EDWARD HILL.

page_text: COMPLETE SPECIFICATION.
Improved Mechanism for Operating the Healds of Looms for
Weaving.
We JAMES HILL of 35 Ethel Street Keighley, in the County of York,
Machine Maker, and EDWARD HILL of the same place, Machine Maker 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 :-
It relates to the construction of certain parts used in connection with mechanism
for operating the healds of looms for weaving, said mechanism being known as
dobby mechanism, and consists of forming said parts, so that they are more durable,
can be produced cheaper, while at the same time the action of the mechanism is
made more perfect.
In the accompanying drawings
Fig. 1 is a sectional elevation of our improved mechanism.
Fig. 4 is an elevation showing part of the mechanism hereinafter fully
described.
Figs. 5 and 6 are sectional views and Figs. 2. 3. 7. 8 and 9 views in detail of our
improved mechanism.
In carrying out our said invention we make use of two grates or grids a and b
which are fixed in suitable positions, so that one comes directly over the other,
when placed in the machine. These grates or grids a and b are arranged with
feet a¹ and a', and 6 and 6, which pass under the framework c and are suitably
fastened to angle brackets d, (see Fig. 5) said angle brackets & being bolted to the
framework c. These grates or grids a and b are made of cast iron or other suitable
metal, and each arranged so as to form a double grate or grid, that is, the grates a
and ³ project vertically while the grates a and project horizontally when placed
in position in the machine. Into the grates a and b are placed cast iron needles /
(see Fig. 2) said needles h being suitably formed and having flat heads h¹. These
needles h are held in position in the said grates a and by strips of metal a³ and 6
(see Fig. 5) which pass across the full length of said grates and are suitably
fastened thereto, while at the same time the needles have full freedom to work.
Through the grates a³ and 6 pass catches k and k¹, said catches & resting upon the
flat heads h' of needles and being prevented from getting off the flat heads h¹ of
needles by the grate a³.
The catches
feelers m.
pass through the grates 63 and rest on the tail pieces m' of
The needles h rest on feelers n, they the said feelers n being fulcrumed on the
same shaft, and exactly like the feeler m except that the tail piece m¹ is dispensed
with. By forming the joints and which are fulcrumed to the driving lever s at
the front of machine (said joints being coupled to the draw bars u by suitable
connecting rods 14) of such a shape that they can be fulcrumed nearer to the centre
of shaft t upon which the said lever s is fixed, and by forming the joints and
(which are fulcrumed to the lever s' at the back of machine, said lever 8' being also
fixed to the shaft t) of such a shape that they are fulcrumed further away from the
centre of the shaft t upon which the lever is fixed, when the shaft t moves it
causes the levers & and s¹ to oscillate, and with the joints r. r¹ and ³ and µ³ being
fulcrumed to the said levers & and they too are also moved.
8
But with the joints and being fulcrumed nearer the centre of the shaft t, upon
which the said levers is fixed, they move through less space than do the joints r
and which are fulcrumed to the lever but further away from the centre of
shaft t upon which the said lever s¹ is fixed. Therefore when the draw bars u are
coupled up to the joints r, r¹ and ³ and they, the said draw bars, are drawn

page_text: forward according to the oscillation of the levers s and s¹, but the said draw bars u
are drawn a less distance at the front of machine, than at the back, by reason of
the joints and at the front of machine, being moved through less space, than
are the joints and which are fulcrumed to the lever s' at the back of machine.
Upon the upper side of the draw bars u, lugs u² are cast in such a manner, that
when the catches k and k¹ (see Fig. 6) are engaged with the draw bars u there is a
lug u on each side of them, therefore when the said draw bars u are being drawn
further at the back of machine than at the front, there is no fear of the catches k
and slipping sideways when they are engaged with, and being drawn forward by,
the said draw bars u, and by these means a perfect shed or lift in the healds can be
obtained.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that
what we claim is :-
1. The grates or grids a and b, having feet a', a³ and 61 and 63, the angle
brackets and the framework c in combination, the same being arranged in the
manner and for the purpose as herein set forth and illustrated by the accompanying
drawings.
2. The needles h having flat heads h¹, the catches k and k¹, the grates or grids a
and having the vertical grates a3 and 63, the horizontal grates a' and 6, the strips
of metal a and b, and the feelers m and n in combination, the same being formed
in the manner and for the purpose as herein set forth and illustrated by the
accompanying drawings.
3. The shaft t, the levers s and s¹, the joints r, rand and ³, the connecting
rods, the draw bars u having lugs u, and the catches k and k¹ in combination, the
same being formed and arranged to operate substantially as herein specified and for
the purpose set forth.
Dated this 7th day of September 1894.
JAMES HILL.
EDWARD HILL.