Improvements in Dobbies for Looms for Weaving..
Year: 1898

page_text: Date of Application, 15th Nov., 1898
Complete Specification Left, 15th Aug.. 1899-Accepted, 16th.Sept., 1899
Improvements in Dobbies for 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:-
This invention consists of an improved arrangement of an open shed dobby such
as claimed in our Specification No. 8000 of 1897 and others for the purpose of
converting the same, when desirable, into a shut or centre shed dobby.
In order to make clear our invention, we will explain that dobbies are used
for forming the shed of the warp in looms for weaving, the warp threads being
drawn through healds which are connected to the levers in the dobby.
An open shed dobby differs from a shut or centre shed dobby in one respect
namely, in an open shed dobby the healds not operated remain at their top or
bottom position for the whole of the operation, whilst in a shut or centre shed
dobby all the healds are brought to a central position at each operation of the
dobby.
In this our invention the heald lever is connected to the baulk lever same as
in the before-mentioned specification but instead of the stud on which the heald
lever fulcrums being fixed as hitherto it is arranged so that it can be fixed or
moveable as required.
We design the heald lever with an arm having a longitudinal slot in which
the before-mentioned stud traverses vertically when required, also with a radius
slot so that when the lever is operated it moves on a fixed pin and is thus held
in position.
When the dobby is working as an open shed, the stud is fixed at the top of the
slot and the heald lever, fulcrumed on same, operates the heald, which is con-
nected to the beforementioned arm, as required for an onen shed. When the
dobby is working as a shut or centre shed dobby the stnd being operated from
any motor part of the dobby or loom traverses vertically down and up the longi-
tudinal slot at each operation of the dobby, the movement is so arranged that
at the part of the operation when the shed is required to be open the stud is at
the top of the slot, and the heald lever oscillates on same as for an open shed, also
at the part of the operation when the shed is required to be closed, the stud is at
the bottom of same, and thus the arm is brought to a vertical position and the
heald attached to the latter to its central position, and thereby the shed is closed
as required in a shut or centre shed dobby. When the stud is making its vertical
movement the beald lever fulcrums on its connection with the baulk lever.
A clutch and lever is applied to the stud so that the change from an open shed
dobby to a shut or centre shed dobby and vice-versa can readily he made by the
onerator

page_text: In the above we have described one heald lever but as is well understood there
is a series of these levers all working in the manner described.
Dated this 14th day of November 1898
improvements in Dobbies for 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 same is to be performed, to be particularly described and ascertained in and
by the following statement:-
This invention consists of an improved arrangement of an open shed dobby such
as claimed in our Specification No. 8000 of 1897 and others for the purpose of
converting the same when desirable into a shut or centre shed dobby.
In order to make clear our invention we will explain that dobbies are used
for forming the shed of the warp in looms for weaving, the warp threads being
drawn through healds which are connected to the levers in the dobby.
An open shed dobby differs from a shut or centre shed dobby in one respect
namely, in an open shed dobby the healds not operated remain at their top or
bottom position for the whole of the operation, whilst in a shut or centre shed
dobby all the healds are brought to a central position at cach operation of the
dobby.
.In this our invention the heald lever is connected to the baulk lever same as
in the before-mentioned specification but instead of the stud, on which the heald
lever fulcrums being fixed as hitherto it is arranged so that it can be fixed or
moveable as required.
We design the heald lever with an arm having a longitudinal slot in which
the before-mentioned stud traverses vertically when required, also with a radius
slot so that when the lever is operated it moves on a fixed pin and is thus held
in position.
When the dobby is working as an open shed the stud is fixed at the top of the
slot and the heald lever fulcrumed on same operates the heald, which is con-
nected to the beforementioned arm, as required for an open shed. When the
dobby is working as a shut or centre shed dobby the stud. being operated from
any motor part of the dobby or loom, traverses, vertically, down and up the longi-
tudinal slot at each operation of the dobby, the movement is so arranged that
at the part of the operation when the shed is required to be open, the stud is at
the top of the slot and the heald lever oscillates on same as for an open shed, also
at the part of the operation when the shed is required to be closed the stud is at
the bottom of same, and thus the arm is brought to a vertical position and the
heald attached to the latter to its central position and thereby the shed is closed
as required in a shut or centre shed dobby. When the stud is making its vertical
movement the heald lever fulcrums on its connection with the baulk lever.
In the above we have described one heald lever but as is well understood there
is a series of these levers all working in the manner described.
In order to make clear our invention we append hereto a sheet of drawings
marked with figures of reference in which like figures denote like parts.
Figure 1 is an elevation of our improvement with the heald lever working as
in an open-shed dobby, it also shows one position when working as a shut or

page_text: centre-shed dobby. Figure 2 shows the other position when working as a shut
or centre-shed dobby.
In this our improvement the baulk lever I is connected to the heald lever 2
in the ordinary manner and we make use of the fixed pin 3 & stud 4 as described
in our Specification No. 22063 of 1898.
When the dobby is working as an open-shed, the stud 4 is fixed at the top of
the slot 5 and the heald lever 2 fulcrums on same as required for an open-shed
dobby. See Fig. 1. When the dobby is working as a shunt or centre shed dobby
the stud 4 is made to traverse vertically in the slot 5 and is so arranged that when
the shed is required to be open the stud is at the top of the slot, see Figure 1,
and when the shed is required to be closed it is at the bottom of the slot 5, see
Fig. 2. A radius slot 6 in lever 2 is prepared to receive the fixed pin 3 and by
this means the lever 2 is held in position.
From the above it will be seen that an open-shed dobby with our improved
lever 2 can readily be changed into a shut or centre shed dobby.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:—
An improvement whereby an open shed dobby can be made to operate the
healds as a shut or centre-shed dobby when so required as described and specified.
Dated this 14th day of August 1899,
RICH. L. HATTERSLEY,
SIMEON JACKSON,
Applicants.
RICH. L. HATTERSLEY,
SIMEON JACKSON.
Applicants.