Improvements on Drawing Rollers for Flax and other Fibres, and Methods of Applying same.
Year: 1885

page_text: Improvements on Drawing Rollers for Flax and other Fibres,
and Methods of Applying same.
I WILLIAM SCOTT, of 163 Agnes Street Belfast, in the County of Antrim,
Engineer, do hereby declare the nature of my invention for "IMPROVEMENTS ON
DRAWING ROLLERS, FOR FLAX, AND OTHER FIBRES, AND METHODS OF APPLYING
SAME to be as follows:-
"
This improvement consists in the use in preparing machinery for flax, tow,
bemp, or jute, in all cases where "double bossed" drawing rollers are used, of an
arrangement as described, of "single boss" arbors, each boss in its drawing action
on the fibre, being entirely separate from and independent of every other.
Some of the advantages claimed from this arrangement are, that owing to the
small diameter of the journals which can be used, and the great freedom of action
which the single boss roller has as compared with the double less weight is
required, friction is reduced, more regular aliver is produced, a considerable saving
is effected in the items of waste, lubrication, power required and quantity of wood
used, defects either in sliver or boss being confined to one boss, and not doubled as
in the ordinary arrangement.
Each roller is kept in position by means of a radial forked lever, passing along
each side of boss, to a sufficient distance in front of centres, and having journals
bearing on projecting ends of arbor.
This lever at one end fits a fixed bar, round which it moves freely, this bar being
set so that the arc of circle described by centres of arbors, practically coincides
with the central line of pressure of rollers.
It serves the purpose of keeping the arbor parallel with the boss roller on which
it works, both on the horizontal and vertical axis, thus having complete control of
the position of the roller, it dispenses absolutely with any other guide.
Each boss may have its own lever and weight, or by preference suitable
mechanical contrivances are so arranged that one lever and weight is made to
distribute the pressure equally on two bosses, without regard to their respective
diameters, which may vary to any reasonable extent without any drawback to
their working action, thus avoiding inconvenient multiplication of parts.
The springwire and nut connecting weighted lever may be actuated either above
or below, as is found convenient, and the shape of radial lever, and method of
applying weight to same is varied to suit the requirements of the particular
machine to which the arrangement is applied.

page_text: and Methods of Applying same.
I WILLIAM SCOTT, of No. 76, Agnes St., Belfast, in the County of Antrim,
Ireland, Engineer, do hereby declare the nature of my invention for IMPROVE-
MENTS ON DRAWING ROLLERS, FOR FLAX AND OTHER FIBRES AND METHODS OF
APPLYING SAME and in what manner the same is to be performed, to be parti-
cularly described and ascertained in and by the following statement :-
This improvement consists in a method of using "single boss" drawing rollers,
in preparing machinery, for flax, tow, hemp, or jute, by means of forked radial
levers, each lever having sole control of a single roller, and dispensing with any U
or guide other than said radial lever.
By this means I secure a more perfect application of weight on each boss or
roller, complete absence of straining or slipping between bosses, a great reduction
of friction and of heating of journals of rollers a considerable lessening of heating
and abrasion of the surface of wood rollers, resulting in saving of wood, and also
producing a better sliver.
Perfect freedom of action is also secured and there is no multiplication or com-
plication of levers or weights, the ordinary arrangement of these being used.
The method of working and means employed to secure results as stated above,
are illustrated in the drawings herewith, in which the same letters always apply to
the same or similar parts.
Fig. 1. is a side view of the parts employed.
Fig. 2. is a front elevation of the same.
Fig. 3. is a plan of levers and bosses and
"
Fig. 4. shows a method of applying pressure on the top of levers.
The wood bosses "A" are fixed on axles or arbors B" in the usual manner,
these arbors "B" have projecting ends "C" on which the pressure is applied by
means of the forked radial levers "D." These are formed with two arms connected
to one centre boss, said arms passing along each side of wood boss, some distance
in front of centres of arbor, and having journals in them resting on ends "C"
of arbor.
Collars are formed on the arbors which fit between sides of lever arms and
prevent any motion endwise of rollers.
The pressure is applied on extreme ends of lever arms in which recesses are
formed to receive ends of links "E."
The ends of links "E" are made of suitable form to fit into recesses in lever
arms and are connected at bottom ends by a loosely rivetted cross bar "F." This
cross bar "F".is bent slightly in the middle to insure that the hooks "G" will
rest in direct line of centres of wood bosses.
The spring wire "H" is formed at the top end with a fork in which the
pulley "I" is placed, this pulley is made of varying diameter to suit pitch of frame,
and moves freely on a centre pin.

page_text: A chain passes round this pulley having the hooks "G" fastened at extreme
ends, the free movement of the pulley permitting the adjustment of chain required
for any possible variation of diameters of wood bosses, and insuring perfect
equality of weight on each boss.
The radial levers are made exactly equal in breadth to the pitch of frame to
which they are applied so that the number of levers corresponding to the number
of bosses in head of frame being placed together on the bar "K" a single loose
washer and set screw at each end of bar suffices to keep the rollers in correct
position opposite gills.
The bar "K" is fixed in brackets in proper position to suit centre line of rollers
as shown in drawing.
The bearing rod "L" is also fixed in the same bracket, and supports radial
levers when rollers are out for cleaning and sliding purposes.
When the method of applying pressure on the top of levers shown in Fig. 4 is
used, bridges are cast on the arms of forked levers rising over the largest diameter
of roller. This method is chiefly used for roving frames but it is applicable to
either drawing or spreading frames-The spring wire "M" Fig. 4, is attached at
the bottom end to the weighted lever in the usual manner employed in roving
frames, and is fitted at the top end with the ordinary nut "N" and humbug "O."
This humbug presses on the centre of a loose bridge "P," which has a slot in the
middle allowing the spring wire M" to pass freely through. The slot is long
enough to allow a free movement of bridge from the point of humbug O. The
bridge "P" has also slots at each end, in which short studs or pins having pointed
ends "R" are fitted. These studs move easily in the slots and are kept in place.
by means of central pins "S." The points of these pins rest in slight recesses
formed on the top of the bridges which when this method is used are cast on the
levers "D."
"
By this means equal pressure is conveyed to both bosses, variations of diameters
of bosses and oscillating movements of levers "D" arising from flats, etc. of wood
bosses being provided for by the freedom of movement of bridge "P" against the
point of humbug "O" and of the studs "R" on the pins "S."
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
First The use of self-adjusting links applied on forked radial levers controlling
single boss rollers in the manner and for the purpose set forth.
Second-The use of an arrangement or arrangements by means of which a single
lever and weight is made to distribute weight equally on two separate single boss
rollers in the manner and for the purpose set forth.
D1 14
1
1004