Improved Lifting Motion for Hackling Machines for Flax, Hemp, Jute, and other Fibrous Substances.
Year: 1892

page_text: Date of Application, 16th Apr., 1892
Complete Specification Left, 16th Jan., 1893-Accepted, 18th Feb., 1893
PROVISIONAL SPECIFICATION.
Improved Lifting Motion for Hackling Machines for Flax, Hemp,
Jute, and other Fibrous Substances.
JAMES ALEXANDER Ļaughlin 142 Falls Road & Clonard Foundry Belfast,
County of Antrim Ireland Mechanical Foreman do hereby declare the nature of
this invention to be as follows:-
The object of my invention is to provide the channels of hackling machines
with an alternate up & down motion that will be quite uniform at all points of
traverse, and that can be so adjusted as to permit them to rest any required time at
any required point. For this purpose I use a T shaped lever, having at the head
radial slots, in which the lifting rods are studded and by which the height of lift is
adjusted, while on its sides at the tail end, are wedges hinged or attached in
any other way by the adjustment of which in the slots provided the required rest
is given.
The lever is studded centrally between two crank pins which receive motion by
being fixed in toothed wheels or discs engaging with each other, and as it receives
its oscillating motion from the alternate impingement of these crank pins on the
wedges it carries any alteration in the position or form of the wedges varies the
duration & position of the rest of the channels, whose motion is derived from
the rods, studded in the head of the lever as above mentioned.
April 14th 1892.
JAMES A. LAUGHLIN.
COMPLETE SPECIFICATION.
Improved Lifting Motion for Hackling Machines for Flax, Hemp,
Jute, and other Fibrous Substances.
I JAMES ALEXANDER LAUGHLIN, of Clonard Foundry Belfast 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:-
This invention relates to an improved lifting motion for single or double vertical
hackling machines and it has for its object to provide mechanism whereby the up
and down motion imparted to the channels wherein the strick holders are supported
and travel will be rendered practically constant at all points of the stroke and
the periods of rest which alternate with such up and down motions may be varied
as may be required to permit the fibres to remain stationary a sufficient length of
time whilst being subjected to the action of the hackles.
The mechanism whereby these results are obtained will be described with
reference to the accompanying drawings, forming part of this Specification,
wherein
Figure 1 is an elevation of the mechanism by which the channel-lifting pulleys
of a double hackling machine are operated.
Figure 2 is a cross-section through one of the crank pins and the corresponding
adjustable roller path shewing the crank pin latch in engagement therewith.
The same letters of reference denote like parts in both figures.
This mechanism comprises a T-shaped oscillating lever A pivoted on a stud
at a supported by the end frame of the machine, the two upper arms of this lever
being slotted as at a¹, a³, to permit the joint pin studs 61, 6, to which the lifting
rods B are coupled to be adjusted at any required distance from the centre of
TD

page_text: oscillation a to vary the effective length of the lever arms and consequently vary
the height of lift imparted to the channels as may be required. These slots are
curved so that the lifting rods B will be normal thereto at whatever points in the
slots they may be adjusted and the lifting belts C to which said rods B are con-
nected at their other ends will be in equal tension at all positions of adjustment of
said rods B. These belts C are attached to and lapped round a lifting pulley D
keyed on a shaft d and in one with a lifting segment E to which the strap con-
nected to the lifting channel is attached. The third arm A' of the T-lever A is
acted on alternately in opposite directions by crank pins F¹, F, provided with
friction rollers f',f², and carried by crank arms G1, G2, fixed on equal toothed
wheels I, I, geared together and mounted upon studs H', H', fixed symmetrically
at either side of the vertical plane passing through the axis a and one of the
wheels being driven by pinions h¹, h². The crank pin rollers act on the T-lever
through the medium of angularly-adjustable lateral extensions K', K', forming
crank pin paths pivoted at k to opposite sides of the lever arm A' and fixed
adjustably at oppositely diverging angles thereto by means of slots ³ ³ and bolts.
The shape of the crank pin path may be varied to enable a rest to be given at any
point or the motion otherwise varied. The lever A receives its oscillating motion
by the alternate impingement of the crank pin rollers on the roller paths K', K',
and therefore as these latter are set closer to or farther from the lever arm A¹ the
crank pins will act on them during a lesser or greater portion of a half revolution
of the crank pins and the intervening periods of rest of the lever A and of the
lifting channel will be correspondingly greater or less. The parts k³ of the arm A'
which form continuations of the roller paths K' K' are curved to the radial
distance of the acting faces of the crank pin rollers from their shafts, each of said
parts being concentric to its respective crank shaft on the T-lever reaching its
extreme distance therefrom so that the roller on passing along this concentrically
curved part of its path will impart no motion to the lever A but will retain it
during its period of rest in the position to which it has just been moved by the
action of said roller on its adjustable roller path and so prevent all liability of the
lifting channel being prematurely pulled down by the action of the hackles in
the fibres. In order to prevent the lever A being moved by this or any other
cause faster than it is moved by the crank pins a guard plate L is fixed upon one
side of each adjustable roller path said plate being provided with a flange ? on its
face which is parallel with the acting surface of the roller path and in each crank
pin is centrally mounted a spring latch bolt m whose head projects from the end of
the crank pin and strikes against the bevelled outer face of the flange land yielding,
snaps into engagement with said flange at the same moment that the crank pin
roller begins to act on the adjustable roller path so that the roller path is held in
contact with the roller during the whole period of the latter's action thereon.
When this ceases by the roller arriving at the concentric part of the path, the
latch escapes from under the flange at the upper end thereof.
In applying the invention to a single hackling machine but one adjustable
extension piece or crank pin path is required since the period of rest when the
channel is at the highest position may be constant and therefore the crank pin
roller ƒ¨³ might in that caso act directly on the lever A¹.
The mechanism herein before described may be applied at both ends of the
machine or at one end only if as would usually be the case the lifting segments E
at both ends are on the same shaft d.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In a vertical hackling machine, the combination, with the rocking T-lever
adjustably connected to and acting on the lifting pulley in opposite directions as
described, of one or more angularly-adjustable lateral extension pieces or crank pin
paths and of a pair of cranks rotating together and acting alternately so as to

page_text: oscillate the T-lever in opposite directions, each crank acting only during part of a
half revolution depending in extent on the angle at which the extension piece on
which it acts is set so as to leave intermediate periods of rest of greater or less
duration as specified.
2. In the herein described mechanism for operating the lifting channels of vertical
hackling machines, the combination, with the T-shaped rocking lever, angularly-
adjustable lateral extension pieces or crank pin paths pivoted thereto and cranks
acting alternately on said adjustable paths each during less than a half revolution
so as to leave intervening periods of rest as described, of rigid extensions of the
adjustable crank pin paths concentrically curved to the crank shafts and forming
abutments whereby the T-lever is held stationary during its periods of rest as
described.
3. In the herein described mechanism for operating the lifting channels of
vertical hackling machines, the combination, with the T-shaped rock lever,
angularly-adjustable lateral extension or crank pin paths pivoted thereto, and
cranks acting alternately on said adjustable paths as described, of spring latches
mounted in the crank pins and respectively engaging under a flange or guide
parallel with the path on which the crank pin acts so as to hold the path in contact
with the crank pin throughout the stroke of the T-lever, as specified.
4. In vertical hackling machines, the herein described mechanism for operating
the lifting channels thereof constructed and operating substantially as specified.
DL: 101 1
T
1000
J. A. LAUGHLIN,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.