Improvements in or relating to Dobbies for Weaving.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in or relating to Dobbies for Weaving.
I, THOMAS JAMES CROSSLEY, of Middleton Junction, near Oldham, in the County
of Lancaster, Jacquard Machine Maker, do hereby declare the nature of this inven-
tion to be as follows:-
This invention relates to that class of dobby which is employed for weaving
patterns with cross-borders, and which is provided with two pattern cylinders, one
for the said cross borders and one for the main part of the pattern, the said
cylinders being mounted upon one lever or frame which withdraws one cylinder
as it puts the other into action.
The invention consists principally of special means for altering the position of
the lever or frame aforesaid by hand as required.
Each lever forming the side of this pattern barrel frame is preferably somewhat
prolonged at one end and at this end it is connected to a second lever or arm fast
on a suitable cross shaft and at one side of the dobby this second lever or arm is
prolonged and provided with a pin or peg engaging in a slotted lever hanging
from a suitable bracket or centre fixed to the frame of the dobby.
At the top and bottom of the slot in this hanging lever I form a horizontal notch
or recess at that side nearest to the pattern barrel frame the slot being in such a
position that the pin in the second lever above described can engage in one or the
other recess and hold the pattern barrel frame in such a position that one or the
other of the pattern chains are in action.
The slotted lever is kept in place to support the pin or peg in the recess by means
of a spring fixed to the frame of the dobby; when it is required to release the pin
the slotted hanging lever is withdrawn by a chain or cord passing round a con-
venient pulley and hanging within easy reach of the weaver.
If the pin or peg was in the upper recess the lever will fall and change the posi-
tion of the pattern barrel frame, or if it was in the lower recess the lever can be
raised by a second chain or cord by the weaver.
The oscillating of the pattern barrel frame will bring the ratchets of one of the
pattern barrels into the path of a reciprocating catch which will thus turn the
pattern barrel.
The two reciprocating catches of the two barrels are carried by a rocking lever
mounted loosely upon the rocking centre of the pattern barrel frame and the upper
end of this rocking lever is connected by a link to one of the levers which move
the knives.
The free ends of the catches are supported by chains wires or other suitable
device attached to the frame.
Sometimes instead of the slotted hanging lever above described and the pin or
peg in the second lever and their adjuncts I prolong one side of the pattern barrel
frame and connect it by a link to a crank pin in a pulley disc or chain wheel which
I cause to move by chain or cord with a handle at each end so as to raise or lower
the crank pin, and to hold this disc in the position required for maintaining one or

page_text: other of the pattern barrels in working position I provide a spring acting upon a
projection on the pulley disc or wheel to lock it in one position on the other; or a
spring catch may be used engaging in notches in the disc or wheel.
Dated this 28th day of April 1897.
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.
Improvements in or relating to Dobbies for Weaving.
I, THOMAS JAMES CROSSLEY, of Middleton Junction, near Oldham, in the County
of Lancaster, Jacquard Machine Maker, do hereby declare the nature of this inven-
tion 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 that class of dobby which is employed for weaving
patterns with cross-borders and which is provided with two pattern cylinders, one
for the said cross borders and one for the main part of the pattern, the said
cylinders being mounted upon one lever or frame which withdraws one cylinder
as it puts the other into action.
The invention consists principally of special means for altering the position of
the lever or frame aforesaid by hand as required; and the same will be readily
understood from the accompanying drawings and the following explanation thereof.
Fig. 1 is a side elevation of so much of a dobby as is necessary to illustrate my
invention.
Fig. 2 is a partial elevation shewing a modification hereafter more particularly
described.
Each lever a forming the side of the pattern barrel frame, is at one end con-
nected to a second lever or arm b fast on a suitable cross shaft b* and at one side
of the dobby (that seen on the drawing) this second lever or arm is prolonged at bl
and provided with a pin or peg c engaging in a slotted lever d hanging from a
suitable bracket or centre fixed to the frame e of the dobby.
At the top and bottom of the slot d¹ in this hanging lever d I form a horizontal
notch or recess, marked d² d³ respectively, at that side nearest to the pattern barrel
frame a, the slot d¹ being in such a position that the pin c in the part 1 of the
lever b can engage in one or the other recess d or d³ and hold the pattern barrel
frame a in such a position that one or the other of the pattern chains a² or a³ are
⚫in action.
The slotted lever d is kept in place to support the pin or peg c in the recess
dor d³ by means of a spring g fixed to the frame e of the dobby.
When it is required to release the pin c the slotted hanging lever d is with-
drawn by a chain or cord h passing round a convenient pulley h¹ and hanging
within easy reach of the weaver.
If the pin or peg was in the upper recess d² the lever 6' will fall, or can be pulled
down by the cord i, and change the position of the pattern barrel frame a, or if
it was in the lower recess d³, the lever can be raised by a spring at k or by a chain
or cord by the weaver.
The oscillating of the pattern barrel frame a will bring the ratchet wheel a* of
one of the pattern barrels a¹ into the path of a reciprocating catch / which will
thus turn the pattern barrel.
The two reciprocating catches 1 of the two barrels a¹ are carried by a rocking
lever mounted loosely upon the rocking centre o of the pattern barrel frame
a

page_text: and the upper end of this rocking lever is connected by a link m to one of the
levers n which move the knives p.
The free ends of the catches are supported by chains 12 or wires or other suit-
able device attached to the frame e.
Sometimes instead of the slotted hanging lever d above described and the pin or
peg c in the second lever 6 61 and their adjuncts I prolong one side of the pattern
barrel frame a as seen at Fig. 2 and connect it by a link or a slot r to a crank pin s
peg c in the second lever 6' and their adjuncts I prolong one side of the pattern
a handle at each end so as to raise or lower the crank pin s, and to hold this disc s¹
in the position required for maintaining one or other of the pattern barrels a¹ in
working position I provide a spring acting upon a flat or a projection on the
pulley disc or wheels s¹ to lock it in one position or the other or a spring catch
may be used engaging in notches in the disc or wheel.
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 improved means for altering the position of the pattern barrels by hand,
substantially as described with reference to Figs. 1 or 2 on the annexed drawings.
2. The means for actuating and supporting the catches / substantially as here-
inbefore described with reference to Fig. 1 on the annexed drawings.
Dated this 28th day of January 1808
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.