Improvements connected with the Jacquards of Looms for Weaving.
Year: 1892

page_text: Date of Application, 16th Apr., 1892
Complete Specification Left, 14th Jan., 1893-Accepted, 18th Feb., 1893
PROVISIONAL SPECIFICATION.
Improvements connected with the Jacquards of Looms for
Weaving.
1, BENJAMIN SENIOR ARMITAGE, of The Carr, Shepley, near Huddersfield,
Yorkshire, Manufacturer, do hereby declare the nature of this invention to be
as follows:-
This invention has reference to the Hollingworth and Knowle's loom in which are
employed certain well known levers commonly called "vibrating levers" connected
to toothed wheels or segments oscillated backwards and forwards by two toothed
cylinders, one arranged above the toothed segments and one below them and they
are employed for the purpose of giving rotatory motion to the segments when
opening and closing the "shed." These vibrating levers are raised by a chain of
bowls and they descend by their own weight or gravitation, but when weaving
heavy goods and using strong warp, these vibrating levers do not always drop and
place the segments into gear with the bottom cylinder, consequently there is faulty
weaving. To prevent this, weighted cords have been connected to the rear ends of
the vibrating levers so as to ensure them dropping. To the use of these weighted
cords there are several objections, in addition to which, they are in the way of the
chain of bowls and free access cannot be got to the cords.
The object of my invention is to dispense with these weighted cords and to
provide a more mechanical and automatic method of ensuring the positive dropping
of the vibrating levers. To do this I use a rectangular frame above the vibrating
levers, the top bar of which, is adjustable in height. Onto the top of each
vibrating lever (or onto as many as is thought desirable) I place a vertical spindle
the foot or bottom of which is notched to fit onto the levers. The top of the
spindles pass through holes or perforations in the top adjustable bar and between
the said and a collar or boss at the bottom of the notched spindles or an inter-
mediate bar, are compressed spiral springs, which force the vibrating levers down
each time a lifting bowl is removed from under it. By this means the weighted
cords are dispensed with and the positive descent of the levers ensured.
Springs of different strengths may be employed to suit the varying strengths of
warp, and the power of the springs may be regulated by adjusting the top bar.
Instead of the notched spindles acting upon the vibrating levers, they may
act upon the ordinary connecting arms, which connect the toothed segments to the
jack levers.
Dated this 14th day of Anvil 1802
COMPLETE SPECIFICATION.
Improvements connected with the Jacquards of Looms for
Weaving.
I, BENJAMIN SENIOR ARMITAGE, of The Carr, Shepley, near Huddersfield,
Yorkshire, Manufacturer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
Our invention has reference to the Hollingworth and Knowle's looms in which

page_text: are employed certain levers commonly called "vibrating levers," connected to
toothed wheels or segments oscillated backwards and forwards by two toothed
cylinders, one arranged above and the other below the toothed segments, when
opening and closing the "shed." These vibrating levers are raised by a chain of
bowls and they descend by their own weight, but in weaving heavy goods and
using strong warp the said levers do not always drop and place the segments into
gear with the lower cylinder and consequently there is faulty weaving. To ensure
the dropping of the levers weighted cords have been connected thereto, but their
use is objectionable and being in the way of the chain of bowls free access cannot
be had to the latter.
.
The object of my invention is to dispense with these weighted cords and to
provide a more mechanical and automatic method of ensuring the positive dropping
of the vibrating levers which is hereinafter fully described and shewn on the
accompanying drawings forming a part of this Specification wherein :-
Fig. 1 is sectional side elevation of a detached portion of a loom of ordinary
construction, sufficient to shew the application of my invention;
Fig. 2 is enlarged end elevation of part thereof, and
Fig. 3 is plan taken on line 1. 2. of Fig. 2.
In the drawings a denotes the vibrating levers carrying the toothed segments b, c
the connecting arms which connect the toothed segments to the jack levers d, e,
and the toothed cylinders, one arranged above and the other below the toothed
segments, and employed to rotate the said segments when opening and closing the
"shed." g is the pattern chain carrying the bowls for lifting the vibrating levers
so as to place the segments into gear with the upper toothed cylinder e.
When
the lifting bowls are removed from under the vibrating levers and a blank
presented, they fall by their own weight or gravitation and place the segments into
gear with the bottom cylinder as is well known.
In order to ensure that the vibrating levers shall drop positively and place the
segments into gear with the cylinder when no bowl is presented, a number of
spindles are passed through openings in a cross rail i and are adapted to slide
freely therein to the extents of movement of the vibrating levers, their lower ends
being provided with notches or grooves ³ to receive the upper edges of the
vibrating levers a onto which they are placed as shewn in Fig. 2 either onto all of
them or onto as many as is required. The spindles are preferably arranged in two
rows as shewn in Figs. 1 and to allow sufficient room for working, and have
collars or bosses formed thereon to prevent withdrawal when removing or
altering any of the parts. The upper ends of the said spindles pass through
openings formed in a cross rail or bar k adapted to be slided up and down in the
frame by screws m working through nuts in said frame or by equivalent
mechanical devices. Each spindle is provided with a spring n confined between
the boss or collar and the adjustable cross rail. The frame supporting the
spindles is bolted to the framework p of the loom.
When a lifting bowl is presented under the vibrating levers and raises them so
as to place the segments into gear with the upper toothed cylinder e, the spiral
springs n are compressed between the collars and adjustable cross rail k, but as
soon as the lifting bowls are removed from under the vibrating levers, the said
springs force down the spindles and consequently the vibrating levers and place the
segments into gear with the bottom cylinder f.
By these means the objectionable weighted cords are dispensed with and the
positive descent of the levers ensured.
Springs of different strengths may be employed to suit the varying strengths of
warp, and the power of the springs may be regulated by adjusting the bar or rail k
up or down.
Instead of the notched spindles acting upon the vibrating levers, they may act
upon the ordinary connecting arms which connect the toothed segments to the
jack levers.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
Firstly. In jacquards of looms for weaving, the use of spindles notched at their
lower ends to fit onto the vibrating levers and spiral springs confined between a
shoulder on said spindles and a cross rail for ensuring the positive descent of the
vibrating levers and toothed segments substantially as herein shewn and described.
Secondly. In jacquards of looms for weaving in which vibrating levers and
toothed segments are employed, the combination therewith of spindles such as h
having collars and notched or grooved to fit onto the levers, spiral springs n
confined between the collars and adjustable rail k and means for adjusting the
cross rail k, all arranged and operating in the manner and for the purposes substan-
tially as herein shewn and described.
Dated thie 13th day of Januar 1893.
TASKER & CROSSLEY,
Halifax, Agents.