Improvements in or in connection with the Shedding Mechanism of Looms for Weaving.
Year: 1896

page_text: Date of Application, 14th, 'Feb., 1896
Complete Specification Left, '24th Oct., 1896-Accepted, 28th Nov., 1896
PROVISIONAL SPECIFICATION.
Improvements in or in connection with the Shedding Mechanism of
Looms for Weaving.
We, WILLIAM RICHARD GIBBS FAREY, of the Firm of Samuel Farey and Son,
of Skipton, in the County of York, Manufacturer, and ROBERT LANGHORNE,
of the same place, Manager, do hereby declare the nature. of this invention to
be as follows:
Our invention relates to improvements in or in connection with the shedding
mechanism of looms for weaving, and particularly to the shedding motions known
as dobbies which have a frame work extending over the centre of the loom with
two parallel rows of heald lifting levers from which the heald shafts are suspended
and by means of which they are raised and lowered.
Prior to our present invention it has been customary to form the inner ends of
these levers with teeth so that when mounted on their respective shafts the teeth
on one lever gear with the teeth of the corresponding lever mounted on the opposite
shaft and consequently the levers rise or fall simultaneously.
In practice this construction has been found defective chiefly owing to the strain
put upon the teeth, in consequence of which they soon become worn with the result.
that the lift of one lever is greater than the other whereby the shedding is uneven
and unequal.
The chief object of our invention is to obviate this defect and to insure equality
of lift and even shedding.
We accomplish this object by dispensing with teeth on the levers and instead
coupling each heald lifting lever by a connecting rod to the reciprocating bell
crank lever or its equivalent. For this purpose we prefer to form each heald
lifting lever in one series with an upright arm or elbow to the upper end of which
one end of a connecting rod from the upper part of the reciprocating bell crank
lever is jointed. Each heald lifting lever in the other series is coupled by a link
to another part of the reciprocating bell crank lever so that as the latter moves the
heald lifting levers in both series rise or fall simultaneously and positively without
practically any variation.
Dated this 13th day of February 1896.
H. B. BARLOW & GILLETT,
Agents for Applicants.
COMPLETE SPECIFICATION.
Improvements in or in connection with the 'Shedding Mechanism of
Looms for Weaving.
We, WILLIAM RICHARD GIBBS FAREY, of the Firm of Samuel Farey and Son,
of Skipton, in the County of York, Manufacturer, and ROBERT LANGHORNE,
of the same place, Manager, 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:-
Our invention relates to improvements in or in connection with the shedding
Price 8d 1

page_text: mechanism of looms for weaving, and particularly to the shedding motions known
as dobbies which have a frame work extending over the centre of the loom with
two parallel rows of heald lifting levers from which the heald shafts are suspended
and by means of which they are raised and lowered.
Prior to our present invention it has been customary to form the inner ends of
these levers with teeth so that when mounted on their respective shafts, the teeth
on one lever gear with the teeth of the corresponding lever mounted on the opposite
shaft and consequently the levers rise or fall simultaneously.
In practice this construction has been found defective chiefly owing to the strain
put upon the teeth, in consequence of which they soon become worn with the
result that the lift of one lever is greater than the other whereby the shedding is
uneven and unequal.
The chief object of our invention is to obviate this defect and to insure equality
of lift and even shedding.
We accomplish this object by dispensing with teeth on the levers and instead
coupling each heald lifting lever by a connecting rod to the reciprocating bell
crank lever or its equivalent.
The accompanying drawing shows so much of a dobby or heald machine as is
necessary for the illustration of our invention.
In this view, a designates one of the reciprocating bell crank levers which is
pivoted on a shaft band is actuated as usual by the knife lever of the dobby. The
beald lifting lever c of the first series of lifting levers is fulcrumed as usual on
a shaft d and is coupled by a link e to the lower part of the bell crank lever a.
The heald lifting lever of the second series of lifting levers is fulcrumed
as usual on a shaft g and for the purposes of our invention is formed as an elbow
lever and is coupled by a connecting rod to the upper part of the bell crank
lever a.
In operation as the hell crank levers a are reciprocated in the ordinary way well
understood the heald lifting levers c and f in both series being coupled thereto by
the rigid connections e and h rise and fall simultaneously and positively without
practically any variation whereby the defect of unequal lift is entirely prevented.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. Dispensing with teeth on the heald lifting levers and instead coupling the
said levers in both series by connecting rods to their respective bell crank levers
substantially in the manner and for the purposes herein set forth.
2. In combination, the reciprocating bell crank lever a, its heald lifting levers c
andy, and the couplings or connecting rods e and h all arranged and operating
substantially as and for the purposes herein described with reference to the
accompanying drawing.
Dated this 23rd day of October 1896.
H. B. BARLOW & GILLETT,
17 St. Ann's Square, Manchester, Agents for Applicants.