Improvements in or appertaining to the Shedding Mechanism of Looms for Weaving.
Year: 1895

page_text: Date of Application, 30th Nov., 1825
Complete Specification Left, 29th Aug., 1896-Accepted, 10th Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in or appertaining to the Shedding Mechanism of
Looms for Weaving.
We, RICHARD Longden HatterSLEY, of North Brook Works, Keighley, in
the County of York, Machine Maker, and SIMEON JACKSON, of the same address,
Manager, do hereby declare the nature of this invention to be as follows:-
It relates to that class of shedding mechanism of looms for weaving, wherein
au open shed dobby with double lifting levers is employed for actuating the healds,
and it consists of an improved arrangement of the lifting levers.
Hitherto, when two lifting levers have been used for each heald, in conjunction
with an open shed dobby, it has been usual to connect only one of such levers to
the corresponding bell crank lever of the dobby, motion being given to the second
lifting lever by means of toothed sectors formed with the said levers, whereby
these said levers are geared together, the movement of one effecting a like
movement of the other.
The result of the constant friction on the teeth is that the second lever is not
sufficiently accurate in its movements, and has, on this account, frequently to be
replaced. To obviate this we have devised a more durable method of connecting
the levers to the bell crank levers of the dobby, the following being a description
of our said method.
We operate both lifting levers of each heald directly from their corresponding
bell crank levers of the dobby, and pivot the two lifting levers of each heald in
the same position as when they are geared one to the other, but dispense with the
before-named toothed sectors usually formed with the said lifting levers.
The first lifting lever, or lever nearest to the dobby, is formed and connected to
the bell crank lever in the same manner as when the two levers are geared together,
with the exception that it is formed without the toothed sector. The second lever,
however, in addition to being formed without the toothed sector, is made after the
shape of a bell crank lever. The bell crank lever of the dobby is formed with a
finger, to which is hooked or connected one end of a bar, the other end of which
is hooked or connected to the vertical arm of the second lifting lever. Thus, the
movement of each of the bell crank levers of the dobby directly operates both of
the corresponding lifting levers to which the healds are connected, the said healds
being thereby raised evenly, and into a perfectly level position.
Dated this 27th day of November 1895.
J. SIDNEY CRITCHLEY,
27 Kirkgate, Bradford, Agent for the Applicants
COMPLETE SPECIFICATION.
Improvements in or appertaining to the Shedding Mechanism of
Looms for Weaving.
We, RICHARD LONGDEN HATTERSLEY, of North Brook Works, Keighley, in
the County of York, Machine Maker, and SIMEON JACKSON, of the same address,
Manager, do hereby declare the nature of this invention and in what manner the
[Price]

page_text: same is to be performed, to be particularly described and ascertained in and by
the following statement :-
It relates to that class of shedding mechanism of looms for weaving, wherein
an open shed dobby, with double lifting levers, is employed for actuating the
healds, and it consists of an improved arrangement of the lifting levers.
Hitherto, when two lifting levers have been used for each leald, in conjunction
with an open shed dobby, it has been usual to connect only one of such levers to
the corresponding bell-crank lever of the dobby, motion being given to the second
lifting lever by means of toothed sectors formed with the said levers, whereby
these said levers are geared together, the movement of one effecting a like move-
ment of the other.
The result of the constant friction on the teeth is that the second lever is not
sufficiently accurate in its movements, and has on this account frequently to be
replaced.
To obviate this we have devised a more durable method of connecting the levers
to the bell-crank levers of the dobby, the following being a description of our
said method.
We operate both lifting levers of each heald directly from their corresponding
bell-crank levers of the dobby, and pivot the two lifting levers of each heald in
the same position as when they are geared one to the other, but dispense with the
before-named toothed sectors usually formed with the said lifting levers.
The first lifting lever, or lever nearest to the dobby, is formed, and connected
to the bell-crank lever, in the same manner as when the two levers are geared
together, with the exception that it is formed without the toothed sector.
The
second lever, however, in addition to being formed without the toothed sector, is
made after the shape of a bell-crank lever. The bell-crank lever of the dobby is
formed with a finger, to which is hooked or connected one end of a bar, the other
end of which is hooked or connected to the vertical arm of the second lifting
lever. Thus the movement of each of the bell-crank levers of the dobby
directly operates both of the corresponding lifting levers to which the healds
are connected, the said healds being thereby raised evenly, and into a perfectly
level position.
In order to more fully explain our invention, we append hereto a drawing,
Fig. 1, marked with figures & letters of reference.
A denotes the bell-crank lever, pivoted on the shaft B, which is operated in the
ordinary manner, that is, by means of the knives C & C. This manner of operating
the bell-crank lever is well understood.
The lifting levers D & D', to which the healds are connected, are pivoted, as
hitherto, on the shafts E & E. The lever D is connected, as hitherto, by means
of rod F to the bell-crank lever A. The lever D¹ is formed with two arms 1 & 2,
& the arm 1 is connected, by the bar 3, to the finger 4 formed on the bell-crank
lever A.
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,―
The manuer of connecting the lifting lever D' to the bell-crank lever A
substantially as shown and described.