IMPROVEMENTS IN DOBBYS OR SHEDDING MACHINES OF LOOMS FOR WEAVING
Year: 1886

page_text: Date of Application, 13th Dec., 1886
Complete Left, 13th Sept., 1887
Complete Accepted, 25th Oct., 1887
I, JOSEPH BUTTERFIELD of 2 Brighton Cliffe, Bramley, Leeds in the County of
York, Weaving Overlooker, do hereby declare ths nature of my invention for
"IMPROVEMENTS IN DOBBYS OR SHEDDING MACHINES OF LOOMS FOR WEAVING" to
be as follows:-
This invention relates to an improved device for automatically and positively
returning the catch levers and catches back after being operated or drawn by the
draw bar, also to an improvement in needles and catches whereby one needle operates
its two catches.
According to this my said invention in lieu of the draw bar as heretofore employed
I dispense with such appliances, and substitute two plate or rectangular frames
working in the slots of the side frames of the dobby of such width as nearly to
occupy the whole space between the hooked end of the catches and the swing lever to
which the latter are attached, these plates have the motion imparted to them as and
by the same means as the old draw bars were operated by-and it will be seen that
when the inner edge of the plate shall have acted upon a catch, that so soon as the
plate begins its return movement its other edge is at once in contact with the catch
lever which it pushes back so that the catch levers and catches are always carried
back at each return movement of the plate.
The needles I employ are flat or rectangular on section and work through a grating
which prevents their twisting or turning upon each needle are two slight projections
or lugs, there being corresponding lugs or projecting pins on one side of each catch,
so that when the needle is to lift, say-the top catch, its lug will act upon the pin in
the catch, and lift the catch-but if the catch has engaged with its draw plate, the lug
on the latter will then have been drawn out of the way or line of the lug of the
ascending needle, so likewise when the bottom plate and catch are engaged, the lugs
on the catch and needle are out of the way of each other.
1
D
1000
WALTER BRIERLEY,
Town Hall Buildings, Halifax,
Agent for the Applicant.

page_text: Improvements in Dobbys or Shedding Machines of Looms
for Weaving.
I, JOSEPH BUTTERFIELD of 2 Brighton Cliffe, Bramley, Leeds in the County of
York, Weaving Overlooker, 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 an improved device for automatically and positively
returning the Catch levers and catches back after being operated or drawn by the
draw bar, also to an improvement in needles and catches whereby one needle
operates its two catches.
According to this my said invention in lieu of the draw bar as heretofore employed
I dispense with such appliances, and substitute two plate or rectangular frames
working in the slots of the side frames of the dobby of such width as nearly to
occupy the whole space between the hooked end of the catches and the swing lever to
which the latter are attached, these plates have the motion imparted to them as and
by the same means as the old draw bars were operated by-and it will be seen that
when the inner edge of the plate shall have acted upon a catch that so soon as the
plate begins its return movement its other edge is at once in contact with the catch
lever it pushes back, so that the catch levers and catches are always carried back at
each return movement of the plate.
The needles I employ are flat or rectangular on section and work through a grating
which prevents their twisting or turning, upon each needle are two slight projections
or lugs, there being corresponding lugs or projecting pins on one side of each catch
so that when the needle is to lift; say, the top catch its lug will act upon the pin in
the catch, and lift the catch, but if the catch has engaged with its draw plate, the lug
on the latter will then have been drawn out of the way or line of the lug of the
ascending needle, so likewise when the bottom plate and catch are engaged, the lugs
on the catch and needle are out of the way of each other.
Such being the nature and object of my said Invention the following is a complete
description of same, reference being had to the accompanying drawings forming a
part of this Specification in which :-
Fig. 1. is an elevation of the dobby.
Fig. 2. is a plan view.
Fig. 3. is a sectional elevation shewing needle grates catches and rocking bar
drawn to enlarged Scale.
The several figures on Sheets 4. and 5. are some of the separate parts drawn to
enlarged Scale in order to clearly illustrate their construction.
At 1. is the ordinary rocking lever operated from the tappet shaft by crank & rod
as usual 2 and 3 are hooks which engage in holes in the lugs 4. 5. on the side of the
frames 6 and 7. the motion of the rocking lever 1. on its fulcrum shaft 8. imparts to

page_text: the frames 6 and 7. a reciprocating motion similar to the motion of the old draw bars
or knives.
On reference to Fig. 3 it will be seen that the inner edge 9 of the grate 6 being
close to the balk lever 9° on the return movement of the said grate 6. the balk lever 9ª
is returned or forced back and at the same time the lower frame 7 will be moved in
the opposite direction.
Each of the Catches 10. 11. are provided with side or projecting pins 12. 13. and
catch needle 14 has two projections or lugs 15. 16. so that according to the peg or
blank in the peg (or said mechanism) 17 so will the projections 15 or 16 lift the
catches 12. 13. or one of them clear of the reciprocating frames 6 and 7 or permit
said catches to be lowered so as to engage with one or other of the grates 6 and 7.
accordingly as the healds are to be operated.
When the hook 23 of the catches 10. 11 are not engaged with the grate 6. or 7.
the flat part 25 of the hook rests upon the bars 26 of the frame 6 or 7 and by which
the said hooks are held up or supported.
At 18 is a double grate the horizontal arms 19 of which steadies the needles
laterally whilst the lower part 20 steadies the catches 10 and 11. the part 20 also
serves to lock catches 10 and 11 when in the raised position because the pin 12 is
then behind the part 20 of the grating as shewn by Fig. 3. so likewise when the
catches 10. 11 are dropped so as to engage with the frame 6. 7. or one of them, the
top edge 21 of the catch 10 is then under the part 22 of the double grating 18, and
is thus locked and prevented lifting off or slipping off the drawer frames-at 27
and 28 are the cross bars which form fulcrums for the balk lever 9ª.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed I declare that what I claim is :-
1. The needles 14. having the projections 15. 16, the draw hooks 10. 11. the latter
having a projecting pin such as 12. 13 the double or angle grating 18 all in combina-
tion and as illustrated and herein fully described.
2. The reciprocating frames 6. 7. in combination with the catches 10. 11. and balk
lever 9 operated and operating as herein described and illustrated by annexed
drawings.