Improvements in Jacquard Machines for Looms.
Year: 1892

page_text: Date of Application, 30th Jan., 1892
Complete Specification Left, 31st Oct., 1892-Accepted, 30th Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in Jacquard Machines for Looms.
I, JOHN WATSON of Belfast Machine Works, Limited Leeson Street Belfast,
Machine Maker do hereby declare the nature of this invention to be as follows.:-
My invention consists in making each hook hereinafter called compound hook, in
two portions which may be detached from each other when required, so that it may
be applicable with two sets of needles to either single action or double action cross
bordering Jacquard machines (one cylinder working repeat and the other cylinder
the cross border) or that a double action cross bordering machine can be worked
either as a double action single cylinder machine (one cylinder resting) or as a
double action double cylinder machine-without the aid of needle levers and
fulcra bars.
As regards any of the above methods of working-The mechanism for actuating
cylinders to be the same or similar as that embodied in my previous Patent
No. 16,822 October 1890.
The two portions into which my compound hook is divided are so constructed so
connected and so arranged that when the upper or lower set of needles actuates the
hooks the position which the latter takes is such as clears or frees the griffs or
branders in rising.
This is accomplished by connecting the lower portion of my compound hook to
the top set of needles by means of cranks formed in the latter the upper end of said
portion of my compound hook having an eye formed in it, which forms a fulcrum for
upper or gib portion of my compound hook.
The upper or gib portion of my compound hook acts (when the bottom set of
needles are working) as a lever of the first order, which has a fulcrum in eye formed
in lower portion of my compound hook, the lower arm of which is actuated by
bottom set of needles by means of cranks formed in the latter.
When the top set of needles are working the crank in lower set of needles
becomes a fixed fulcrum for upper or gib portion of my compound hook which acts
as a lever of the third order and is thus pressed back by the action of lower portion
of my compound hook through the connecting eye formed at the top of same, so
that top or gib portion of my compound hook clears the griffs or branders in rising.
When the bottom set of needles are working the lower portion of my compound
hook remains stationery and gib or upper portion of my compound hook works in
eye formed in top of same as fulcrum and top arm of gib portion is thus pressed
back so as to clear the griffs or branders in rising.
The mechanical connection of the two portions which constitute my compound
hook is such that the attendant can readily and easily take out or replace hooks
without entailing that loss of time and expense which at present takes place in the
ordinary cross bordering machine, also as my compound hook does away with the
use of needle levers and fulcra bars such as have been used in cross bordering
machines heretofore the working parts are reduced and machine is not so liable to
get out of order, also owing to increased leverage given to my compound hook a
less amount of pressure is required to press back hooks thus reducing wear and tear
on cards, also as the gib of upper portion of my compound hook is the only part of
said hook which wears it can be easily replaced without having to renew entire
hook.
Dated this 28th den of Tanu 1800

page_text: COMPLETE SPECIFICATION.
Improvements in Jacquard Machines for Looms.
I, JOHN WATSON of Belfast Machine Works, Limited, late of Leeson Street
Belfast and now Springfield Road, Belfast, 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 :—
My invention consists in making each hook, hereinafter called compound hook,
in two portions which may be detached from each other when required, so that it
may be applicable with two sets of needles to either single action or double action
cross bordering Jacquard machines (one cylinder working repeat and the other
cylinder cross border) or that a double action cross bordering machine can
be worked either as double action single cylinder machine (one cylinder resting) or
as a double action double cylinder machine-without the aid of needle levers and
fulcra bars.
As regards any of the above methods of working the mechanism for actuating
cylinders to be the same or similar as that embodied in my previous Patent
No. 16822 October 1890.
The two portions into which my compound hook is divided are so constructed so
connected and so arranged, that when the upper or lower set of needles actuates the
hooks the position which the latter takes is such as clears or frees the griffs in rising.
This is accomplished by connecting the lower portion of my compound hook to
the top set of needles by means of cranks formed in the latter. The upper end of
said portion of my compound hook having an eye formed in it which forms a fulcrum
for upper or gib portion of my compound hook. The upper or gib portion of my
compound hook acts (when the bottom set of needles are working) as a lever of the
first order which has a fulcrum in eye formed in lower portion of my compound
book, the lower arm of which is actuated by bottom set of needles by means of
cranks formed in the latter.
When the top set of needles are working the crank in lower set of needles
becomes a fixed fulcrum for upper or gib portion of my compound hook which acts
as a lever of the third order, and is thus pressed back by the action of lower portion
of my compound hook, through the connecting eye formed at top of same, so that
top or gib portion of my compound hook clears the griff or brander in rising.
When the bottom set of needles are working the lower portion of my compound
hook remains stationery and gib or upper portion of my compound hook works in
eye formed in top of same as fulcrum and top arm of gib portion is thus pressed
back so as to clear the griffs in rising.
And in order that my invention may be more easily and readily understood I
have annexed a sheet of drawings representing two of my compound hooks and also
two needles (one of each set viz. upper and lower actuated from opposite sides of
Jacquard machine by which said hooks are actuated) in the normal position which
they occupy in the machine when at rest. Referring to Sheet No. 1-A and B
are the two portions upper and lower respectively which constitute my compound
hook E is the eye formed in the lower portion B of my compound hook-N is
one of the upper set and N¹ one of the lower set of needles-C is the griff
or brander.
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
The mechanical arrangement and construction of hooks & needles for Jacquard
machines as described in the foregoing Specification & shown in the sheet of
drawing attached thereto.