Improvements in Dobbies for Looms for Weaving.
Year: 1898

page_text: Date of Application, 20th Oct., 1898
Complete Specification Left, 20th July, 1899-Accepted, 2nd Sept., 1899
PROVISIONAL SPECIFICATION.
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:-Firstly-An arrangement applicable to open shed
dobbies, such as claimed in our Specification numbered 8,000 of 1897, and
others for the purpose of converting the same into a shut or centre shed dobby.
Secondly An arrangement applicable to the same classes of dobby, whereby
paper cards can be used instead of wood lags with wood or metal pegs as hitherto.
Before describing the first part of our invention, we will explain that dobbies
are used for forming the shed of the warp in looms for weaving, the warp being
drawn through healds which are connected to the levers in the same.
Also an
open shed dobby differs from a shut or centre shed dobby in one respect namely:-
in the latter all the healds are brought to a central position at each operation of the
dobby, and at the time when the crank of the loom is about its front centre, whilst
in the open shed dobby, the healds not operated remain at their top and bottom
positions as required.
The first part of our invention is as follows:--We connect to the ordinary
heald levers of the dobby a series of swing levers, mounted loosely on a stud,
and the healds are connected to same. These swing levers are designed with a
radius slot so that when operated they move on a fixed pin, and are thus held
in position, they have also a longitudinal slot for the before mentioned stud on
which they are fulcrumed.
When the dobby is working as an open shed this stud is fixed at the top of the
longitudinal slot and the levers fulcrumed on same operate the healds as required
for an open shed.
When the dobby is working as a centre or shut shed dobby, this stud is made to
traverse, being operated from any motor part of the dobby or loom, up and down
the longitudinal slot at each operation, it is so arranged that at the part of the
operation when the shed is required open the stud is at the top of the slot and the
levers oscillate on same as for open shed, at the part of the operation when the
shed is required closed it is at the bottom of same and thus forces all the levers
into a vertical position and thereby brings the healds to a central position and
closes the shed as in a shut or centre shed dobby. 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 can readily be made by the operator.
The second part of our invention refers to the indicating motion of the dobby,
this motion determines, at each operation, the healds to be operated by the dobby.
In our present arrangement we dispense with the ordinary wood lags and wood or
metal pegs, also the simple lever but make use of the ordinary needle which has
been operated hitherto by the simple lever. We operate this needle in the
following manner: We mount loosely in a grid another short needle under the
ordinary needle, it is moved vertically and is designed with a cap piece so that it

page_text: does not drop through the grid. The chain of paper cards passes over a rising and
falling cylinder which is operated from any motor part of the dobby or loom, and
when a heald is required to be raised a hole is punched in the paper card into
which the short needle drops, thus also allowing the ordinary needle to drop, or
if the card is not punched the needle is raised and thereby the heald is lowered.
The short needle is designed so that it can be rendered inoperative when required, in
this case it does not come in contact with the cylinder and no indication is
imparted to the heald lever which is consequently not operated. As usual there
is a series of these needles, one for each heald; and the remaining portions not
described in the above, of the dobby are well known and we do not include the
same in our present application.
Dated this 19th day of October 1898.
RICHD. L. HATTERSLEY,
SIMEON JACKSON,
Applicants.
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 Firstly: An arrangement applicable to open shed
dobbies, such as claimed in our Specification numbered 8,000 of 1897, and others
for the purpose of converting the same into a shut or centre shed dobby.
Secondly: An arrangement applicable to the same classes of dobby, whereby
paper cards can be used instead of wood lags with wood or metal pegs as
hitherto.
Before describing the first part of our invention, we will explain that dobbies
are used for forming the shed of the warp in looms for weaving, the warp being
drawn through healds which are connected to the levers in the same.
Also an
open shed dobby differs from a shut or centre shed dobby in one respect namely:--
in the latter all the healds are brought to a central position at each operation
of the dobby and at the time when the crank of the loom is about its front centre,
whilst in the open shed dobby the healds not operated remain at their top and
bottom positions as required.
The first part of our invention is as follows:-We connect to the ordinary heald
levers of the dobby a series of swing levers mounted loosely on a stud, and the
healds are connected to same. These swing levers are designed with a radius slot
so that when operated they move on a fixed pin and are thus held in position, they
have also a longitudinal slot for the before mentioned stud on which they are
fulcrumed. When the dobby is working as an open-shed this stud is fixed at the
top of the longitudinal slot and the levers fulcrumed on same operate the healds,
as required for an open shed. When the dobby is working as a centre or shut
shed dobby this stud is made to traverse, being operated from any motor part of
the dobby or loom, up and down the longitudinal slot, at each operation, it is so'
arranged that at the part of the operation when the shed is required open the
stud is at the top of the slot and the levers oscillate on same as for open shed, at
the part of the operation when the shed is required closed it is, at the bottom of
same and thus forces all the levers into a vertical position and thereby brings

page_text: the healds to a central position and closes the shed as in a shut or centre shed
dobby.
The second part of our invention refers to the indicating motion of the dobby,
this motion determines, at each operation, the healds to be operated by the dobby.
In our present arrangement we dispense with the ordinary wood lags and wood
or metal pegs also the simple lever but make use of the ordinary needle which has
been operated hitherto by the simple lever. We operate this needle in the follow-
ing manner, we mount loosely in a grid another short needle under the ordinary
needle, it is moved vertically and is designed with a cap piece so that it does not
drop through the grid. The chain of paper cards passes over a rising & falling
cylinder which is operated from any motor part of the dobby or loom and when
a heald is required to be raised a hole is punched in the paper card into which
the short needle drops, thus also allowing the ordinary needle to drop, or if the
card is not punched the needle is raised and thereby the heald is lowered. The
short needle is designed so that it can be rendered inoperative when required, in
this case it does not come in contact with the cylinder and no indication is
imparted to the heald, lever which is consequently not operated.
As usual there is a series of these needles, one for each heald; and the remain-
ing portions, not described in the above, of the dobby are well known and we do
not include the same in our present application.
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.
Fig. I is an elevation of dobby showing the arrangement applicable to open
shed dobbies for converting the same into a shut or centre shed dobby, which
forms the first part of our invention. Fig. II is a part elevation of same &
Figs. III. & IV. are sectional plan views of same. Figs. V & VI are elevation
& end views of dobby showing our arrangement whereby paper cards can be used
instead of wood lags & pegs which forms the second part of our invention.
In the first part of our invention the frame 1 shafts 2 & 3 lever 4, baulk 5, stop-
bars 6 & 7, three leg 8, may be of any ordinary construction. On the shaft 2
we mount loosely the segment wheel 9 which gears with the wheel 10. The
wheel 10 with the eccentric 11 attached to same, is mounted loosely on the pin 12
& to the eccentric 11, we connect the lever 13 by rod 14. The lever 13 fulcrums on
stud 13", & operates the stud 15 being connected with same by rod 16.
Thus when it is desirable to work the dobby as a shut or centre shed dobby the
two pins 17 & 18 are adjusted as shown in Fig. III that is, they connect the
segment wheel 9 to the three leg S, which is rigidly mounted on the shaft 2
& the stud 15 is made to traverse vertically in the slot 19 of the swing lever 20.
This movement is arranged so that the stud 15, is at the top of the slot 19 & the
swing levers 20 oscillate on same at that part of the movement when the shed
is required to be open; also that the stud 15 is at the bottom of the slot 19 (see
Fig. II.) & thus the swing levers 20 are brought to their central position at that
part of the movement when the shed is required to be closed.
When it is desirable to work the dobby as an open shed dobby, the two pins 17
& 18 are placed as shown in Fig. IV. that is the segment wheel 9, is connected
to the frame 1 of the dobby & is thus held rigid & no movement is imparted to the
stud 15, and the swing levers 20 oscillate on same as required in an open shed
dobby.
In the second part of our invention the sides 21 & 22 grates 23 & 24 needle 25
catches 26 & 27, are of any ordinary construction.
We operate the cylinder 28 mounted in stands 29 & 30 by rod 31 from any
motor part of the loom, & it is turned forwards or backwards by the catches 2
& 33 the position of the latter being controlled by the rod 34. A set of cards 35
passes over the cylinder 28 & indicates the movement to be imparted to the healds
by means of the short needle 35 & the ordinary needle 25. The short needle 35
of which there is a series, is mounted loosely in the grid 37 & designed with a
cap 38 so that it does not drop through same it is also prepared to receive a pin

page_text: at the point 39 & in this case it does not receive any movement to transmit to the
heald lever which is consequently not operated.
Having now particularly described & ascertained the nature of our said inven-
tion & in what manner the same is to be performed we declare that what we
claim is:
Firstly: The combination of parts as shown & described whereby an open shed
dobby can be made to operate the healds same as a shut or centre shed dobby.
Secondly, The combination of parts applicable to a dobby by the aid of which
paper cards can be substituted for the ordinary wood lags & pegs as shown and
described.
Dated this 19th day of July 1899
RICHD). L. HATTERSLEY,
SIMEON JACKSON,
Applicants.