IMPROVEMENTS IN DOBBY MECHANISM FOR WEAVING
Year: 1878

page_text: LETTERS PATENT to George Parker, of Preston, in the County of Lancaster,
Weaving Manager, for the Invention of " IMPROVEMENTS IN DOBBY
MECHANISM FOR WEAVING."
Sealed the 1st November 1878, and dated the 16th July 1878.
PROVISIONAL SPECIFICATION left by the said George Parker at the Office
of the Commissioners of Patents on the 16th July 1878.
GEORGE PARKER, of Preston, in the County of Lancaster, Weaving Manager.
IMPROVEMENTS IN 'DOBBY' MECHANISM FOR WEAVING."
Firstly. My Invention relates to double-lift jacquard machines, and consists in
arranging the two hooks which are to work together so that they are both con-
nected at their lower ends with a staple-formed wire (which actuates the warp
threads) so as to lift such staple wire when either of the two hooks is lifted, the
books and staple wire being so connected by a long eye that if the staple wire is
lifted by one hook it will allow the other hook to remain down.
Secondly. My Invention also relates to means and arrangements by which dobby
mechanism worked by pegged lags (which are more economical and convenient than
cards) may be made to actuate a greater number of hooks than as hitherto arranged,
and consists in making the dobby mechanism with two rows of needles, one over
the other, and employing lags with two rows of pegs, and in placing in front of the
end of each needle a flat spring, having one end attached to the framing. One spring
for the upper needle may be attached above and the other for the lower needle
below, or both springs for both rows of needles by being cranked are or may be
attached to the same part of the framing above or below the needles.

page_text: The pegs in the lags strike against these springs, and the flat side of the spring
forces in the needle, and when the lag is withdrawn the springs are allowed to
come back, and the needles are pushed back by the springs acting upon them.
The flat springs are or may also be arranged to pull back the needles by being
connected with them if desired. The flat springs cause the pegs in the lags to act
on the needles with certainty.
The ends of the needles have or may have flat or enlarged ends secured to them
if desired in place of the springs, or the pegs in the lags are or may be made with
enlarged ends.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Parker in the Great Seal Patent Office on the 15th January
1879.
GEORGE PARKER, of Preston, in the County of Lancaster, Weaving Manager.
"IMPROVEMENTS IN DOBBY MECHANISM FOR WEAVING."
Firstly. My Invention relates to double-lift jacquard machines, and consists in
arranging the two hooks which are to work together so that they are both con-
nected at their lower ends with a staple-formed wire (which actuates the warp
threads) so as to lift such staple wire when either of the two hooks is lifted, the
hooks and staple wire being so connected by a long eye or loop that if the staple
wire is lifted by one hook it will allow the other hook to remain down.
Secondly. My Invention also relates to means and arrangements by which dobby
mechanism worked by pegged lags (which are more economical and convenient than
cards) may be made to actuate a greater number of hooks than as hitherto arranged,
and consists in making the dobby mechanism with two rows of needles, one over the
other, and employing lags with two rows of pegs, and in placing in front of the end
of each needle a flat spring or hinged lever having one end attached to the framing.
One spring or lever for the upper needle may be attached above and the other for
the lower needle below, or both springs or levers for both rows of needles, by being
cranked, are or may be attached to the same part of the framing above or below
the needles.
The pegs in the lags strike against these springs or levers, and the flat side of the
spring or lever forces in the needle, and when the lag is withdrawn the springs or
levers are allowed to come back or be pushed back, and the needles are pushed back
by the springs acting upon them.
The flat springs are or may also be arranged to pull back the needles by being
connected with them if desired. The flat springs cause the pegs in the lags to act
on the needles with certainty.
The ends of the needles have or may have flat or enlarged ends secured to them
if desired in place of the springs, which last-named arrangement I prefer to use, or
the pegs in the lags are or may be made with enlarged ends and formed of wood
or metal.
Fig. 1 is a cross sectional elevation of dobby or jacquard mechanism according to
my Invention, arranged as I prefer to carry out my Invention; and Fig. 2 is a front-
view showing the arrangement of two lifting wires.
The general arrangement of the mechanism is similar to ordinary double-lift
dobby mechanism, but to enable my Invention to be better understood I will explain
some of the parts of the Drawing.
a is one of the side frames; b is the oscillating shaft actuated from the loom in
the ordinary manner. It has a bean lever b¹ at each end, and to each end of the
lever there is a connecting rod jointed. One connecting rod 62 is jointed with a
stud from a rod (68) sliding in vertical guides on the framing, and the other con-
necting rod 64 is jointed to the other rod 65 sliding in vertical guides. To parts from
each of these vertical sliding rods (63 and 65) the plates c are secured, which take up
the hook-lifting wires & when they are not forced to one side by the needle e
connected with each hook lifter.
The shafts for carrying the pegged lags are arranged and carried on slides f' in
the ordinary manner, and are actuated by arms f2 on the oscillating shaft f³ in the
usual manner, and the barrels are turned and retained after each movement in the
ordinary manner.
The needles e are connected with the lifting hooks d by being cranked in the
ordinary manner. Two rows of needles e are used one above the other. The two
upper needles act upon hooks d in the first and third row from that side at which

page_text: they are actuated, and the two lower needles e also actuate hooks d in the first and
third row from the side at which they are actuated.
Each needle e has an eye or curl in it for a spring wire g to pass through, the
springs being secured and carried by cross pieces g' attached to the framing. The
end of each needle e has a flat piece of metal e' screwed on it, which is reduced at
its end so as to slide in spaces or slits in a comb plate h.
The lags are of the ordinary form, and are connected together in the usual
manner except that they are provided with a double row of holes, so that two pegs
may force back when desired both the upper and lower needle e by striking the flat
pieces e¹ on the ends of the needles e. One of these lags i is shown on the left-hand
side of Fig. 1, with two pegs, as they are about to strike the flat pieces e¹ on the
ends of the needles. d¹ and d² are plates carried by the framing, having slots in
them to guide the hook wires which pass through slots in them.
The lower ends of the hook wires d are looped in the ordinary manner, and tho
loops of each two hook wires nearest the sides are connected by a staple-formed
wire j, which is bent with a long eye or loop to hook into the loops of the hooks d
as shown. These staple-formed wires j pass through slots in the guide plates d² and
between notches in the edges of comb plates. Thus arranged the staple wire j
can be lifted by either hook wire d without acting upon the hook wire d that is
not lifted.
Fig. 3 is a side and Fig. 4 a front view to illustrate the mode of using springs or
levers to be acted upon by the pegged lags to press against the ends of the
needles.
The ends of the needles come through holes in the needle
an hinge is secured in the comb spaces, in which levers
wire passing lengthway through the hinge piece l.
board k, to which
are jointed on a
The levers 71
The flat end of each lever l' comes against the end of the needle c.
for the lower row of needles have a projection from the fulcrum part to comė
against the hinge plate 7 to prevent them from falling too far forward.
Flat elastic springs are or may be used in place of the levers l' if desired.
I have now particularly described the nature of my Invention and the manner
of carrying the same into effect, and claim as my Invention,-
Firstly. The combination of staple-formed wires (j) to connect two lifting wires (d)
in a double-lift jacquard or dobby, substantially as herein-before described..
Secondly. The arrangement of dobby or jacquard mechanism with the needles (c)
in two rows, one over the other, to be actuated by double-pegged lags (i), substan-
tially as herein-before described, and illustrated by the Drawings.
Thirdly. The combination of flat pieces (e¹) with the needles (e), or flat springs or
levers () with the needles (e), so as to be actuated by double-pegged lags (i),
substantially as herein-before described, and illustrated by the Drawings.
In witness whereof, I, the said George Parker, have hereunto set my hand
and seal, this Thirteenth day of January, in the year of our Lord One
thousand eight hundred and seventy-nine.
.
GEORGE PARKER. (L.S.)