IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1882

page_text: LETTERS PATENT to William Henry Hacking, of Bury, in the County of
Lancaster, Machine Maker, and Edward Grube, of the same Place,
Draughtsman, før ап Invention of " IMPROVEMENTS IN LOOMS FOR
WEAVING."
PROVISIONAL SPECIFICATION left by the said William Henry Hacking
and Edward Grube at the Office of the Commissioners of Patents on the
15th February 1882.
WILLIAM HENRY HACKING of Bury in the County of Lancaster Machine Maker,
and EDWARD GRUBE, of the same Place, Draughtsman. *IMPROVEMENTS IN LOOMS
FOR WEAVING.
The first part of our invention relates to that part of looms for weaving called
the "shedding motion" and has for its object to obtain the same result as is at
present obtained by what is known as a Wooderofts-sectional tappet and at the
same time to dispense with the sections and substitute a pattern surface, consisting
of lags and pegs, bowls, cards of paper or other material.
To effect this, we employ for each heald to be operated on two compound tappet
treadles of peculiar construction which carry internal movable tappets or switches,
acted upon by the aforesaid pattern surface, and arranged so that oscillating bars
may pass over or under the said internal tappets or switches and raise or depress
the treadles. By employing double or compound tappet treadles of the above
construction we are enabled to work our shedding motion from the tappet or
second motion shaft of the loom, or at half the speed of the crank shaft. The
internal tappets or switches of one part of the compound tappet treadle are
alternately engaged with one of the oscillating bars to raise or depress them, while
at the same time the internal tappets or switches of the other part of the compound
tappet treadles are being acted on by the pattern surface to determine the next
shed.
The second part of our Invention relates also to a shedding apparatus and may
be called a positive Dobby or Index machine. This machine is worked by means
of four grifes or knivers working in pairs, which are made to move up and down

page_text: vertically by means of a double internal tappet, revolving at half the speed of the
crank shaft of the loom. The grifes or knivers are centred over the fell of the
cloth being woven so that the depth of the shed made by the front and back
heald shall give the same angle to the warp threads, or what is termed a level
shed.
Two needles and two double hooks are used in connection with each shaft or
heald to be operated on, and the double hooks are so formed and fixed, that they
become engaged either on the ascending or descending grife or kniver of the pair
to which it belongs. The two double hooks belonging to each shaft or heald to be
operated on are connected together by means of a movable part, resembling and
herein called the yoke. The yoke is alternately held at each end by one pair of
grifes or knivers, while the other end is being raised or depressed by means of the
double book and the other pair of grifes or knivers. By this means we obtain a
positive up and down motion to the yoke, which is connected to the healds to be
operated on by means of the usual system of L and T jacks, simple levers, cords
and bowls, or otherwise.
The two needles in connection with the two double hooks are operated on by
any suitable pattern surface, preference being given to paper cards, the pattern
surface determining whether the double hooks shall engage with the ascending or
with the descending grifes or knivers.
We fit in
The third part of our invention relates to loom shuttles and consists in applying
an apparatus for stopping the loom when the weft fails or is broken.
the shuttle a hinged fork under which the weft passes and which is released by the
breakage or failing of the weft. We also make part of the side of the shuttle
movable so that when the hinged fork is released by the breakage or failure of the
weft the movable part of the shuttle is allowed to move inward and it thus allows
the swell to enter the side of the shuttle which not being lifted stops the loom in
the ordinary way,

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Henry Hacking and Edward Grube in the Great Seal Patent
Office on the 14th August 1882.
WILLIAM HENRY HACKING, of Bury in the County of Lancaster, Machine Maker
and EDWARD GRUBE, of the same Place, Draughtsman. "IMPROVEMENTS IN LOOMS
FOR WEAVING."
The first part of our invention relates to that part of looms for weaving called
the shedding motion and has for its object to obtain the same result as is at present
obtained by what is known as a Woodcroft's sectional tappet and at the same time
to dispense with the sections and substitute a pattern surface consisting of lags and
pegs, bowls, cards of paper, or other material.
To effect this we employ for each heald to be operated on two compound tappet
treadles of peculiar construction connected by a link which carry internal movable
tappets or switches acted upon by the aforesaid pattern surface and arranged so
that oscillating or sliding bars may pass over or under the said internal tappets or
switches and raise or depress the treadles. By employing double or compound
tappet treadles of the above construction we are enabled to work our shedding
motion from the tappet or second motion shaft of the loom or at half the speed of
the crank shaft. The internal tappets or switches of one part of the compound
tappet treadle are alternately engaged with one of the oscillating bars to raise or
depress them while at the same time the internal tappets or switches of the other
part of the compound tappet treadles are being acted on by the pattern surface to
determine the next shed.
We fit in
The last part of our invention relates to loom shuttles and consists in applying
an apparatus for stopping the loom when the weft fails or is broken.
the shuttle a hinged fork under which the weft passes and which is released by
the breakage or failing of the weft. We also make part of the side of the shuttle
movable so that when the hinged fork is released by the breakage or failure of the
weft the movable part of the shuttle is allowed to move inward and it thus allows
the swell to enter the side of the shuttle, which, not being "lifted," stops the loom
in the ordinary way.
And in order that our invention may be fully understood and readily carried
into effect we will describe the accompanying sheet of drawings reference being
had to the figures, and letters marked thereon.
Fig. 1 shows part of a loom to which the first part of our invention is applied,
and Fig. 2 is an enlarged view of two compound tappet treadles.
a a¹. are the treadles (connected by a link a³) and they are pivoted on studs b b
fixed to frames c which support the apparatus: d d'. are tappets or switches fitted
on studs on the treadles: each switch has a taper or wedge shaped end that moves
up or down in a space in one of the tappets: a part of each switch enters a recess
or hook at the end of a tumbler lever e: f is the chain or pattern surface that acts
upon the tumbler levers e: g is a T lever one arm of which is connected by a
rod h to a crank pin on the tappet shaft: the other arms of the lever g are
connected respectively to the sliding bars, these bars are moved to and fro in
slots in frames c: the bars pass through the openings in the treadles a a¹ and
raise or lower the treadles by passing over or under the switches as they are lifted
or depressed by the tumbler levers. e. When the bar is acting on the switch & the
bar is in the large space near the end of the tappet al. and vice versa: the star
wheel is fixed on the same shaft as the pattern chain wheel and transmits motion
to the chain: the star wheel is turned by a pin on the carrier wheel & driven by a

page_text: pinion on the crank shaft: the pinion i has only half as many teeth as the carrier
wheel k so that the pattern wheel may be moved once for every two revolutions of
the crank shaft.
Fig. 3 is a plan of a shuttle to which the last part of our invention is applied.
Fig. 4 is a transverse section of the shuttle and Fig. 5 is a longitudinal section of
part of the same.
is the part of the hinged fork or tumbler under which the weft passes: 1. is a
catch piece which serves as a stop to prevent the spring or movable part of the
shuttle side s from being pressed inward by the swell: * is the pin on which the
tumbler swings. We make a slot as wide as the swell through the side of
the shuttle that come against the swell and we place a flat steel spring a, fixed at
one end, to the shuttle in this slot: so long as the weft passes under the tumbler r
the catch piece r. keeps the spring a from being moved inward but as soon as the
weft fails or breaks the tumbler r falls and the catch r². rises into the position shown
in dotted lines on Fig. 5 and the swell presses back the springs and enters the
slot in the side of the shuttle and the swell not being lifted causes the loom to be
stopped by means of the stop rod in the usual manner.
Having stated the nature of our invention and described the manner of
performing the same
We declare that we claim
1. The improved treadles a a¹. with the switches & d. substantially as and for
the purpose herein described.
2 The spring or movable part of the shuttle side & and the fork or tumbler for
retaining the same and for releasing it when the weft fails or breaks substantially
as and for the purpose herein described.
In witness whereof I the said William Henry Hacking for myself and on
behalf of the said Edward Grube have hereunto set my hand and seal this
eleventh day of August One thousand eight hundred and eighty two.
WILLIAM HY. HACKING. (L.S.)