Improvements in Apparatus for Regulating Healds in Looms for Weaving.
Year: 1887

page_text: Date of Application, 4th July, 1887
Complete Left, 3rd Apr., 1888
Complete Accepted. 4th May. 1888
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Regulating Healds in Looms
for Weaving.
We DAVID CRABTREE, and WILLIAM ARTHUR CRABTREE, both of Wrose Brow
Road, Windhill, Shipley, 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 machines for operating healds in looms
for weaving, and has for its object, the construction of certain portions of the said
machine in such a manner that, when the healds are operated for the shuttle to pass
across the loom through the warp, they cannot move until the shuttle pick is completed
and the draw knives brought into position for operating the healds and warp for the
next pick of the shuttle: also to so construct the needles in connection with the draw
knives that each and every needle as it is raised must remain in that position and
support its respective draw knife until the healds are operated and the shuttle pick
completed.
We accomplish the above in the following manner: On a shaft we mount a series
of levers, each lever being connected to a draw.knife, and formed with a curved end
having a recess about the centre, in which is a pin that engages in a slot formed in
another lever having a curved end corresponding with that on the first mentioned
lever, the curves being so arranged on the levers that the healds are locked when at
the top or bottom.
Or we can lock the healds by mounting on the before mentioned shaft, a series of
Llevers, each being connected with a draw knife at one end, and forked or recessed at
the other for the reception of a curved lever, which locks the healds at the top and
bottom.
The draw knives have teeth formed on each side for gearing into segments of wheels,
and the needles for raising the draw knives into gear with the top segment may be
effected by a cord or peg cylinder operated in the usual manner: and when the needles
are raised they are kept in that position by means of a sliding bar which is operated
after every pick of the shuttle: the needles having projections formed thereon resting on
the bar until the cylinder is near the termination of its upward movement, when the
sliding bar is moved clear of the projections and thus allows the needles and
corresponding healds to be changed.
JOHN WAUGH, ;
Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Regulating Healds in Looms
for Weaving.
Wo, DAVID CRABTREE, and WILLIAM ARTHUR CRABTREE, both of Wrose Brow
Road, Windhill, 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:-
This invention relates to certain improvements in machines for operating healds in
looms for weaving, and has for its object, the construction of certain portions of the
machine in such a manner that, after the healds are operated for the shuttle to pass
across the loom through the "shed" of the warp, they are locked and cannot be
moved until the shuttle pick is completed, and the draw knives brought into gear with
the operating mechanism for regulating them for the next pick of the shuttle.
Our object is also to so construct the needles through which the draw knives are
operated, in such a manner that, each and every needle as it is raised must remain in
that position, and support its respective draw knife until the healds are operated and
the shuttle pick completed.
In describing our invention in detail, reference is made to the accompanying
drawings, in which Fig. 1 represents a side elevation of a heald regulating machine
constructed according to our invention. Fig. 2 a back end view. Fig. 3 a view of
the opposite side of the machine to that shown by Fig. 1. Fig. 4a detail of one of
the draw knives and rotating toothed segments. Fig. 5 a side view showing one
of the needles elevated to the position for the draw knife to be in gear with the top
segment, and another in position for the draw knife to gear with the bottom segment,
a portion of a draw knife being shown in each needle; and Fig. 6 a side view of a
needle.
On a shaft A supported by the side frames of the machine we mount a series of
levers B. one leg of each lever being coupled in any convenient manner to a draw
knife C; another arm of each lever is formed with a convex curved end B¹ with a
recess formed about the centre of the curve, in which is a pin D, engaging in a slot
formed in another lever E, having a concave curved end corresponding with the curve
of the first named lever B; so that when any of the draw knives Care operated, the
respective levers B and E are moved in accordance therewith, and are locked at the
termination of the traverse in their respective positions by the curved ends fitting each
other; thereby operating, and securing or holding the healds attached thereto during
the pick of the shuttle until again actuated by the draw knives connected therewith
the healds being connected to the levers in the usual manner.
The draw knives C are constructed with a long slot hole F at one end, through which
is passed a supporting bar G; a projection C is also arranged on each bar with a slot
hole therein for the reception of a pin, by which a connection is formed with a lever B;
and on each side of the draw knives, are rack teeth for operating the same in the
°

page_text: manner herein after described; the remainder of each draw knife at C is parallel, and
works through a slot hole formed in a needlo H, the latter being held in position by
supporting bars J. J. through which they are free to slide.
The shafts K and K₁ are by preference rotated by skew toothed wheels W, and on
each shaft we secure a toothed segment L; on the shaft K' are also secured three
tappets, M being on one end, and N on both ends of the shaft.. The tappet M acts on
a lever P secured to a shaft on which are attached two levers P¹ carrying a peg or
card cylinder Q; the other tappets N acting on the respective bars R, cause them to
slide and give a reciprocating motion to the cross bar S; by which the said bar is moved
into contact for supporting, or clear of the projections H¹ of the needles H; the said
bar being clear of the needles and projections when a change of the healds is about to
take place; but when the latter are changed, and during the pick of the shuttle, the
projections H¹ on those needles that have been raised will rest upon the cross bar S,
thereby keeping them secure during the operation of the respective draw knives and
until the completion of the pick.
The card or peg cylinder Q is operated the necessary rotary distance immediately
after every pick, by the bar T engaging with a recess in toggle wheel U; the shaft $1
being so arranged that, it may be raised or moved through the journals by any well
known method, for the spur wheel V to gear with the upper portion of the wide spur
wheel V on driving shaft; by which the bar T when raised will act on the top sido
of the toggle wheel, and thereby reverse the rotation of the cylinder Q.
When a peg cylinder is used as the pattern surface, and the pegs X raise any
needle a sufficient height so as to be retained by the reciprocating cross bar S, the
respective draw knives Care in position for the teeth of the top segment L, to gear
with the teeth of the said knives, and thereby to actuate them in a direction for
lowering the healds connected therewith; those needles that have not been raised as
described, are in a suitable position for the bottom sogment L to operate the respective
draw knives and raise the healds connected therewith.
It will be well understood by persons acquainted with weaving without particularly
describing the same that when card cylinders are used, the blank places on the cards
act as pegs for raising the needles, and the holes for allowing the needles to remain
resting on the bottom supporting bar J.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The combination of the needles H with the reciprocating cross bar S for the
purpose described.
2. The combination of the needles H, draw knives 0, segments L and locking
levers B and E substantially in the manner and for the purpose set forth.
3. The combination of the tappets M and N. with the cylinder Q. and cross bar S.
substantially in the manner and for the purpose described.
4. The combination of the draw knives with the segments L. L. for the purpose
described.
Dated this 31st day of March 1888
JOHN WAUGH,
Agent.