Improvements in Loom Pattern-chains.
Year: 1894

page_text: Date of Application, 29th May, 1894
Complete Specification Left, 23th Feb., 1895-Accepted, 30th Mar., 1895
Improvements in Loom Pattern-chains.
We, WILLIAM ARTHUR CRABTREE and DAVID CRABTREE both of Windhill,
Shipley in the County of York, Machine Makers, do hereby declare the nature of*
this invention to be as follows, that is to say :-
It relates to pattern-chains for use in connection with looms for weaving, as well
for controlling the movements of the shuttle boxes as for controlling those of the
dubbies or heald operating mechanisms taken in this instance as forming parts of
such looms, and our said invention consists of forming, constructing and arranging
the several parts constituting the said pattern chain so that the pattern surface
thereof may be changed, regulated or altered to produce any design within its
range without any of such parts having to be detached.
To carry our invention into effect, each cross bar, or what may be and is usually
styled "lag," is formed of a tubular shape, with a slot extending lengthwise upon
that part of it which forms its upper surface, so that on an appropriately shaped
base-piece made to fit within the hollow part of the lag, being placed in position
therein, the projection or peg formed upon it may extend out of this slot and
radially from the tubular lag.
Extending laterally from the longitudinal slot in the tubular lag are other slots
corresponding in number with that of the base-pieces. These lateral slots are made
at an angle to or spirally with or from the straight edge of the longitudinal slot
and are of an appropriate length while their width is equal to that of said
longitudinal slot, so that on the projections or pegs on the base pieces being turned
down into these slets they lie as straight in their path of motion but with their
ends extending horizontally as they do when their said ends extend vertically
therefrom, by which means each base-piece is made to occupy the same space when
its projecting part is thus turned down as it does when it is in its erect position,
while those of said projections which are thus erect are caused to move laterally,
by the pressure of the base-pieces as they are being turned down, to assume
positions directly between the outer ends or edges of the parts of the tubular lag
which intervene between the lateral slots made therein and the edge of the
longitudinal slot in which positions they are held by a locking piece at the end of
the tubular lag thus they are properly held in every direction.
may
The locking piece at the end of the lag is preferably arranged so that it be
rotated within said lag in a similar manner to the base-pieces carrying the pegs but
the lateral slot into which its projecting piece is turned is made somewhat spirally
or if desired straight or at right angles to the edge of the longitudinal slot or
otherwise to meet the requirements of holding same when thus turned into it, if
necessary an appropriately formed spring arrangement and notched device being
employed to effect this holding of the locking piece.
To firmly hold these tubular lags in position upon their cylinder end pieces for
contact with this cylinder are formed upon or attached to these tubular lags or
additional parts at any suitable position on these lags are fixed or formed for
performing this function.
To enable the lags to be joined or coupled together to form the pattern chain,
appropriately formed loops are attached thereto to enable intervening coupling
links to be employed or these loops may be made so that these intervening links
may be dispensed with.

page_text: When long tubular lags with pegs having base-pieces fitting within them as
above described are made use of, provided it is found advisable to strengthen these
lags, suitable annular pieces or hoops may be made to take over same in one or
more of the spaces intervening between the projecting pegs.
Instead of the base-pieces carrying the pegs, being made to fit within the tubular
lags, they may be made to take over these lags which they will thus either fully or
partly encircle, and in this case a small projection may be formed within the
opening in each base piece so as to enter the longitudinal and lateral slots in the
lag whereby this latter is enabled to still hold them in position.
Tubular lags somewhat of the tormation herein before described may be employed
with the lateral slots therein, made at right angles to the longitudinal slot with a
separate holding piece extending lengthwise upon each of these lags for securing
these latter in position, while holding pieces are carried at each extremity of
each lag for further securing these longitudinal holding-pieces, however in
the production of these lags we preferably follow the construction first before
described.
Dated this 60th day of May 1894
We, WILLIAM ARTHUR CRABTREE, and DAVID CRABTREE both of Wind hill
Shipley, 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, that is to say :-
It relates to pattern-chains for use in connection with looms for weaving as well
for controlling the movements of the shuttle-boxes as for controlling those of the
dobbies or heald operating mechanisms taken in this instance as forming parts of
such looms, and our said invention consists of forming constructing and arranging
the several parts constituting the said pattern chains so that the pattern surface
thereof may be changed regulated or altered to produce any design within its range
without any of such paris having to be detached.
In the accompanying sheets of drawings;-
Fig. 1 is side elevation and Fig. 2 end view of our improved form of lag with
the pattern pegs arranged in connection with it.
Figs. 3, 3 and 4 are side elevation and top and end views showing our improved
lag without the pegs being applied or the end coupling links attached.
Figs. 5, 6, 7 and 8, are drawings illustrative of several forms of pegs for use in
connection with our improved lag.
Figs. 9 and 10 are illustrative of a modification in the formation of our lag.
Figs. 11 and 12 are front elevation and end view of a series of our lags forming
a pattern chain and as applied to a cylinder.
"
Similar letters and figures indicate similar parts throughout the several views.
To carry our invention into effect each cross bar or what may be and is usually
styled "lag a is formed of a tubular shape with slot b extending lengthwise upon
that part of it which forms its upper surface, so that on an appropriately shaped
basepiece c made to fit within the hollow part of the lag a being placed in position
therein the projection or peg d formed upon it, may extend out of this slot 6 and
radiaily from the tubular lag a.

page_text: Extending laterally from the longitudinal slot in the tubular lag a are other
slots e, corresponding in number with that of the pieces c. These slots e are made
at an angle to or spirally with or from the straight edge b' of the slot b, and are of
an appropriate length while their width is equal or nearly so to that of the slot b,
so that on the pegs d being turned down into these slots e they lie as straight in
their path of motion around the cylinder (as indicated by broken lines Fig. 1, but
with their ends d' extending horizontally) as they do when their said ends are
standing erect or extending vertically therefrom, by which means such piece e is
made to occupy the same space when its projecting part or peg d is thus turned
down as it does when it is in its erect position, while those of said projections or
pegs d which are thus erect, are caused to move laterally, by the pressure of their
neighbouring base-pieces as they are being turned down, to assume positions
directly between the outer ends or edges &* (on the parts el which intervene between
the slots e) and the edge of the slot & in which positions they are held by a
locking-piece at the end of the lag a since by this piece f all the pieces c are
pressed end wise against each other.
The piece is preferably arranged so that it may be rotated within the laga in a
similar manner to the rotating of the base-pieces c, but the lateral slot 2 into which
the projecting-piece1 is turned is inade somewhat spirally or if desired straight
or at right angles to the edges b' of the slot 6 or otherwise to meet the requirements
of holding same when thus turned into it, if necessary an appropriately formed
spring w shown by Fig. 1, being employed to effect this holding of the locking-
piece f.
To firmly hold these tubular lags a in position upon their cylinder g, end pieces h
for contact with this cylinder g are formed upon or attached to these tubular
lags a, or additional parts shown in broken lines at ¹ may be attached or formed
on any suitable positions on these lags a for performing this function.
To enable the lags to be joined or coupled together to form the pattern-chain,
appropriately formed loops 2 are attached thereto or formed therein to enable
intervening coupling links to join them together or these loops may be made long
enough so that these links may be dispensed with and simple joining pins k
employed for directly binging one part 2 to another.
When lags a of considerable length and having the pieces c fitting within them
as above described are made use of, provided it is found advisable to strengthen
these lags a annular pieces m may be made to take loosely over same in one or more
of the spaces e¹.
Instead of the base-pieces c carrying the pegs d, being made to fit within the
tubular lags a they may be made to take over same as shown at c by Fig. 6, in
which case they will either fully or partly encircle same while to hold them in
position a small projecting piece is formed within the opening in each piece c¹ so
as to enter the slots band e in the lag a.
The base-pieces c and pegs d may be formed by having said pieces c solid or
partly solid, and the pegs d'either screwed or rivetted to them the latter or partly
solid formation being shown Fig. 7. Or these parts may be formed by a piece of
wire being wound or formed of a circular shape as shown by Fig. 8, in which case
the peg d and the piece e are integral.
Or again the piece e may be made hollow as shown by Fig. 5, while the peg d
is made to enter therein passing directly through same to be rivetted or fixed on
the other side d².
Tubular lags p (see Fig. 9) somewhat of the formation herein before described
may be employed with the lateral slots q made at right angles to the longitudinal
slot r, with a separate holding piece s (shown by detail drawing Fig. 94) extending
lengthwise upon each of these lags p for securing the pegs d in position, while
holding pieces t t are carried at each extremity of each lag p for further securing
this pieces however in the production of these lags, we preferably follow the
method of construction first before described since in this latter arrangement it is
necessary to detach the holding piece when changing the positions of the pegs.

page_text: .
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. Peg-lags formed by having lateral slots extending from longitudinal slots
made therein for the purposes substantially as herein specified.
2. The combination with peg-lags having longitudinal and lateral slots or
openings for the pegs, of pegs arranged to be used in connection therewith and
means for securing said pegs in their several positions substantially as herein
set forth.
3. The combination of peg-lags having longitudinal and lateral slots as set forth,
pegs formed or arranged to fit within or to take over said lags, and means for
securing same substantially as herein specified.
4. The improved form of lag and pegs for use in connection therewith sub-
stantially as herein described.
Dated this 27th day of February 1895
W. A. CRABTREE,
D. CRABTREE,
Per Samuel Hey,
Agent.