AN IMPROVEMENT IN DRAWING HEADS FOR MACHINERY FOR SPREADING, DRAWING, AND TWISTING HEMP AND OTHER FIBROUS MATERIALS
Year: 1877

page_text: LETTERS PATENT to Thomas Lawson, of Leeds, in the County of York, Manu-
facturer, for the Invention of "AN IMPROVEMENT IN DRAWING HEADS FOR
MACHINERY FOR SPREADING, DRAWING, AND TWISTING HEMP AND OTHER
FIBROUS MATERIALS."
Sealed the 19th March 1878, and dated the 1st October 1877.
PROVISIONAL SPECIFICATION left by the said Thomas Lawson at the
4
Office of the Commissioners of Patents on the 1st October 1877.
"AN IM-
THOMAS LAWSON, of Leeds, in the County of York, Manufacturer.
PROVEMENT IN DRAWING HEADS FOR MACHINERY FOR SPREADING, DRAWING, AND
TWISTING HEMP AND OTHER FIBROUS MATERIALS."
This Invention relates to an improvement on the drawing head described in the
Specification of a Patent granted to Alfred Vincent Newton, dated the 30th May
1876, No. 2276, and consisting of a travelling series of drawing bars interlocking
with a rotating series of drawing bars, the object being to secure a firm grip of the
fibres which are being fed from or by the chain of gills.
The travelling drawing bars in this case constituted a portion of an endless chain
which passed over and around tension rollers, and was held down thereby in contact
there with a lantern wheel, which gave motion to the chain by reason of its bars inter-
locking with the chain bars, and thus carried forward the fibres fed in between the
locking bars.
с
.
It is now proposed to simplify the mechanism by using in place of the links
which connect the travelling bars together and the tension rollers which hold
the chain of travelling bars at tension, a series of detached bars, which are caused
to travel along an endless race, so shaped that the bars as they coine round to the
lantern wheel will interlock with the bars of that wheel, as in the above-described
arrangement, and thus present an extended drawing hold or nip to the fibres to be
operated upon.

page_text: The travelling bars carry at their opposite ends guide pieces, which enter a pair
of slides forming the race in which they travel. These guide pieces serve also to
space the bars by abutting one against the other, and thereby filling the guides.
Gearing into the travelling bars are two pinions situated at or within the turning
ends of the race. As, therefore, the lantern wheel by its rotation carries forward the
travelling bars they will be assisted by means of these pinions in their traverse
motion, each pinion being always in gear with three or more of the bars.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Lawson in the Great Seal Patent Office on the 30th
March 1878.
THOMAS LAWSON, of Leeds, in the County of York, Manufacturer. " AN IM-
PROVEMENT IN DRAWING HEADS FOR MACHINERY FOR SPREADING, DRAWING, AND
TWISTING HEMP AND OTHER FIBROUS MATERIALS."
This Invention relates to an improvement on the drawing head described in the
Specification of a Patent granted to Alfred Vincent Newton, dated the Thirtieth
May, One thousand eight hundred and seventy-six, No. 2276, and consisting of a
travelling series of drawing bars interlocking with a rotating series of drawing bars,
the object being to secure a firm grip of the fibres which are being fed from or by
the chain of gills.
The travelling drawing bars in this case constituted a portion of an endless chain
which passed over and around tension rollers, and was held down thereby in contact
with a lantern wheel which gave motion to the chain by reason of its bars inter-
locking with the chain bars and thus carried forward the fibres, fed in between the
locking bars.
It is now proposed to simplify the mechanism by using in place of the links which
connected the travelling bars together and the tension rollers which hold the chain
of travelling bars at tension, a series of detached bars which are caused to travel
along an endless race, so shaped that the bars as they come round to the lantern
wheel will interlock with the bars of that wheel, as in the above-described arrange-
ment, and thus present an extended drawing hold or nip to the fibres to be operated
upon.
In the accompanying Drawing, Fig. 1 shews in transverse section, and Fig. 2 in
end elevation the improved arrangement of interlocking drawing bars.
In these Figures A is the lantern wheel fitted with bars a; B, B, are a pair of
fixed guides forming the race; and b, the loose bars working therein, one of which
is shewn detached at Fig. 3.
These bars b carry at their opposite ends guide pieces c which enter the slides B,
forming the race in which the bars b travel. These guide pieces serve also to space
the bars by abutting one against the other, and thereby filling the guides.
Gearing into the travelling bars are two loose pinions C situated at and within
the turning ends of the race. As therefore the lantern wheel by its rotation carries
forward the travelling bars, they will be assisted by means of these pinions in their
traverse motions, each pinion being always in gear with three or more of the bars.

page_text: I do not, however, find that the use of these wheels is essential, as the unassisted
action of the lantern wheel will cause the bars b to follow one another in their race,
and thus effectually nip the sliver and hold it securely while moving forward under
the propulsion of the lantern wheel.
Having now set forth the nature of my Invention of "An Improvement in
Drawing Heads for Machinery for Spreading, Drawing, and Twisting Hemp and
other Fibrous Materials," and explained the manner of carrying the same into effect,
I wish it to be understood that under the above in part recited Letters Patent I
claim, the application to drawing heads for the formation of an extended interlocking
holding surface of a series of loose driven holding bars interlocking with a lantern
wheel, such loose bars being guided in their course by an endless race, in the manner
and for the purpose above set forth.
In witness whereof, I, the said Thomas Lawson, have hereunto set my
hand and seal, the Twenty-eighth day of March, in the year of our Lord
One thousand eight hundred and seventy-eight.
THOMAS LAWSON, (LS.)