Improvements in Picking and Dobby Mechanism of Looms for Weaving.
Year: 1895

page_text: Date of Application, 13th Sept., 1895
Complete Specification Left, 13th June, 1896-Accepted, 25th July, 1896
PROVISIONAL SPECIFICATION.
Improvements in Picking and Dobby Mechanism of Looms for
Weaving.
We, GEORGE HERBERT HODGSON, and FRANK LEEMING, both of Thornton
Road, Bradford, in the County of York, Machine Makers, do hereby declare the
nature of this invention to be as follows:-
This invention relates to improvements in looms for weaving and consists:-
Firstly Of improvements in the method of and means employed for controlling
the sliding picking tappets employed on pick and pick " looms, whereby one or
other or both of such tappets may at any time be moved out of operation, and the
operating lever of the picking tappets may continue to work without putting any
strain or stress upon the several parts connected therewith.
Secondly Of improvements in the dobbies or shedding mechanism whereby the
upper and lower tumbler levers are controlled and operated by one ordinary thick
pattern peg.
According to this invention, we employ a slotted lever mounted vertically on a
fulcrum stud or pin, preferably attached to the spur rail of the loom. In the
slot of the lever, the ends of two rods are carried by means of a through pin which
is by a link and connections attached to a hand lever at the front of the loom. The
outer ends of the two rods are connected to the forks which control the sliding
tappets, and a rocking motion is imparted to the vertical slotted lever by means of
a connecting rod and lever operated from the pattern mechanism.
When the loom and picking tappets are working, the two rods are in a straight
line and above the fulcrum pin of the slotted lever, and as the latter rocks, a to and
fro motion is imparted to the rods and the forks and lappets.
When it is desired to move one or other of the sliding tappets out of operation,
the hand lever is moved, and this by the connections and link will move the through
pin, and the ends of the rods down the slot of the lever, until such pin is lineable
with the fulcrum pin of the slotted lever whereon; although the lever continues to
rock, no motion is given to the rods, which are for the time being, practically
shortened and so hold the sliding tappets out of line with their cones, this without
any stress on the rods or forks connected to the sliding tappets, and without strain
on the motion lever.
The two rods are provided with spring escapements, to prevent breakage in case
of of struction when picking.
The improvements in the shedding apparatus consist in the employment of a
lifting lever of full pitch, which is operated and controlled by a thick per of the
pattern barrel.
When two tumbler levers, mounted on one shaft, are employed,
such tumbler levers are half pitch, and are both operated by the full pitch lifting
lever.
When two tumbler levers mounted on different shafts are employed, then such
tumbler levers are both full pitch, and are operated by a lifting lever of full pitch,
each litting lever being double ended or provided with two fingers, one for the
bottom, and one for the top tumbler lever.
Dated this 12th day of September 1895.
BRIERLEY & HOWARD,
Penny Bank Chambers, Halifax, Agents for the Applicants.

page_text: Improvements in Picking and Dobby Mechanism of Looms for
Weaving.
We, GEORGE HERBERT HODGSON, and FRANK LEEMING, both of Thornton
Road, Bradford, in the County of York, Machine Makers, 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 relates to improvements in looms for weaving, and consists
Firstly-Of improvements in the method of and means employed for controlling
the sliding picking tappets employed on "pick and pick" looms, whereby one or
other, or both of such tappets may at any time be moved out of operation, and the
operating lever of the picking tappets may continue to work without putting any
strain or stress upon the several parts connected therewith.
:-
Secondly Of improvements in the dobbies or shedding mechanism whereby
the upper and lower tumbler levers are controlled and operated by one ordinary
thick pattern peg.
Such being the nature and object of our said invention, the following is a
complete description of same, reference being had to the annexed drawings, in
which :-
Fig. is a view in elevation of the improved appliances for controlling the
sliding picking tappets of looms for weaving, shewing both out of operation.
Fig. 2 is a similar view to Fig. 1, shewing one picking tappet in operation, and
one out of operation.
Fig. 2 is a detail.
Fig. 3 is a side elevation of part of a dobby shewing a full pitch lifting lever
operating two tumbler levers mounted on one shaft.
Fig. 3 is a sectional end view on line A. B of Fig. 3 shewing the half pitch
tumbler levers and full pitch lifting levers.
Fig. 4 is a side elevation of part of a dobby shewing a full pitch lifting lever
operating two tumbler levers mounted on two shafts.
Fig. 4 is a sectional end view on line A. B of Fig. 4 shewing the full pitch
tumbler levers and full pitch lifting levers.
According to this invention, and referring to Sheet 1 of the drawings, we
employ a slotted lever 1 mounted vertically on a fulcrum stud or pin 2, preferably
attached to the spur rail 3 of the loom. In the slot 4 of the lever 1, the ends of
two rods 5. 6 are carried by means of a through pin 7, which is by a link 8 and
connections 9. 9, attached to a hand lever 10 at the front of the loom. The outer
ends 11, 11, of the two rods 5, 6. are connected to the forks 12, 12, which control
the sliding tappets 13, 13, and a rocking motion is imparted to the vertical slotted
lever by means of a connecting rod 14 and L lever 15 operated from the ordinary
pattern mechanism 16.
When the loom and picking tappets 13, 13 are working, the two rods 5. 6 are in
a straight line, and above the fulcrum pin 2 of the slotted lever 1, and as the
latter rocks, a to and fro motion is imparted to the rods 5. 6, and the forks 12, 12
and tappets 13, 13.
When it is desired to move one or other of the sliding tappets 13 out of operation,
the hand lever 10 is moved, and this by the connections 9. 9 and link 8 will move
the through pin 7 and the ends of the rods 5. 6 down the slot 4 of the lever 1, until
such pin 7 is lineable with the fulcrum pin 2 of the slotted lever 1, whereon
although the lever 1 continues to rock, no motion is given to the rods 5. 6, which
are for the time being practically shortened, and so hold the sliding tappets 13, 13
out of line with their cones, and this without any stress on the rods 5. 6, or

page_text: compression of the springs 17 thereon, or without strain on the forks 12, 12
connected to the sliding tappets 13, 13 or on the motion lever 1.
The two rods 5. 6 are provided with spring escapements 17 to prevent breakage
in case of obstruction when picking.
The above described motion may be applied to the picking cones instead of to
the sliding tappets. In this case (see Fig. 24) the rods 5. 6 are connected to bell-
crank levers 18 pivoted at 19, the other ends of such levers 18 forming forks 20
enclosing a clutch 21, by means of which the picking cones can be made fast or
loose on their shafts 22.
The improvements in the shedding apparatus (see Sheets 2 and 3 of the drawings)
consist in the employment of a lifting lever 1 of full pitch, which is operated and
controlled by thick pegs 2 of the pattern barrel 3. When two tumbler levers 4. 5
mounted on one shaft 6 are employed (see Fig. 3), such tumbler levers 4.5 are half
pitch (see Fig. 3A) and are both operated by the full pitch lifting lever 1.
When two tumbler levers 4. 5, mounted on different shafts 6. 7 are employed
(see Fig. 4) theu such tumbler levers 4. 5 are both full pitch (see Fig. 4) and are
operated by a lifting lever 1 of full pitch, each lifting lever I being double ended
or provided with two fingers 8. 9, one for the bottom, and one for the top tumbler
lever.
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.) The general construction, arrangement, and combination of parts constituting
the improved mechanism for controlling the picking tappets or cones of looms for
weaving, as and for the purpose herein described, and substantially as illustrated
by Sheet 1 of the annexed drawings.
(2.) The slotted lever 1, rods 5. 6, link 8, forks 12, 12, and sliding tappets 13. 13
all in combination, as and for the purpose herein described, and substantially as
illustrated by Sheet 1 of the drawings annexed.
(3.) The lifting lever 1 of full pitch operated by thick pegs of a pattern barrel
or chain, and operating two tumbler levers 4. 5 of half pitch, and each mounted on
one shaft, as herein described, and as illustrated by Sheet 2 of the accompanying
drawings.
(4.) The two fingered full pitch lifting lever 1, operated by thick pegs of a
pattern barrel or chain, and operating two tumbler levers 4. 5 both of full pitch
and mounted on different shafts, as herein described, and as illustrated by Sheet 3
of the annexed drawings.
Dated this 12th day of June 1896.
GEORGE HERBERT HODGSON,
FRANK LEEMING,
By their Agents, Brierley & Howard,
Penny Bank Chambers, Halifax.