IMPROVEMENTS IN SHUTTLE-BOX MOTIONS FOR POWER LOOMS
Year: 1877

page_text: LETTERS PATENT to Henry Bernoulli Barlow, of Manchester, in the County of
Lancaster, Patent Agent, for the Invention of "IMPROVEMENTS IN SHUTTLE-BOX
MOTIONS FOR POWER LOOMS." A communication from abroad by James Long,
of Philadelphia, in the State of Pennsylvania, in America.
Sealed the 16th November 1877, and dated the 9th June 1877.
PROVISIONAL SPECIFICATION left by the said Henry Bernoulli Barlow at
the Office, of the Commissioners of Patents on the 9th June 1877.
·
..
HENRY BERNOULLI BARLOW, of Manchester in the County of Lancaster, Patent
Agent.
"IMPROVEMENTS IN SHUTTLE-BOX MOTIONS FOR POWER LOOMS." A coin-
munication from abroad by James Long, of Philadelphia, in the State of Pennsylvania,
in America.
The object of this Invention is to construct a simple,. compact, and efficient drop;
box mechanism for power looms, the operation of which shall be positive, and
capable of attaining a high speed; and the Invention consists in the combination of
two sliding racks operating a pinion wheel fixed on and to a shaft upon which is
cut a screw thread carrying a nut connected to the heel of a lever on the side of the
loom; and to which is usually connected the lifting rod of the shuttle boxes, the
pattern to be woven and changes of boxes being controlled by movable pins. of
different lengths in a wheel or chain, operating at the side of the loom. in the usual
and well-known manner.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Henry Bernoulli Barlow in the Great Seal Patent Office on the 21st
November 1877.
HENRY BERNOULLI BARLOW, of Manchester, in the County of Lancaster, Patent
Agent. "IMPROVEMENTS IN SHUTTLE-BOX MOTIONS FOR POWER LOOMS." A. com-
munication from abroad by James Long, of Philadelphia, in the State of Pennsylvania,
America.
The object of this Invention is to construct a simple, compact, and efficient drop-
box mechanism for power looms, the operation of which shall be positive, and
capable of attaining a high speed; and the Invention consists in the combination of
two sliding racks operating a pinion wheel fixed on a shaft upon which is cut a
screw thread carrying a nut connected to the heel of a lever, to which is connected
the lifting rod of the shuttle boxes, the pattern to be woven and the changes of
boxes being controlled by movable pins of different lengths in a wheel or chain,
operating at the side of the loom in the usual and well-known manner.
And in order that this Invention may be fully understood and readily carried
into operation, I will proceed to describe the accompanying Sheet of Drawings.
Fig. 1 is an end view of a loom frame shewing my improvement.
Fig. 2 represents two views of the lever j.
Fig. 3 represents two views of the shaft g, on which is the nut i and pinion h.
Fig. 4 represents two views of the lifter /c.
Fig. 5 represents two views of the vertical sliding rack f; and Fig. 6 represents
two views of the vertical sliding rack e.
A represents the frame of the loom; b, the tappet shaft; c, the eccentric cam for
operating the lever d, in the right-hand end of which is hung on a pin the lifter k;
e and fare the sliding racks with spur teeth on the lower ends, and provided with
shouldered projections 1, 2, 3, and 4, two on each rack; this number is required to
operate three shuttle boxes. To operate four boxes three projections are required
on each rack, and a greater length and number of teeth on each rack. g is ą shaft
set in a frame fixed to the loom side; on this shaft is fixed the pinion h, and on
the opposite end is cut a screw thread upon which is fitted a nut i, in the top of
which is cut a slot 8, into which fits a pin p fixed in the heel of the lever j. To the
left-hand end of the lever j is connected the lifting rod, supporting the shuttle boxes
in the usual manner.
In Fig. 1 is shewn a ratchet wheel w, in which are five pins, one being longer
than the others. The pin wheel is operated in the usual manner by a pawl moved
by a cam on the shaft b, and the action of the pins is conveyed to, the lifter & by the
connections, as shown in Fig. 1.
As before stated, the movements of the boxes are controlled by movable pins of
different lengths. A long pin will bring the bottom box in line with the shuttle
race; a short one, the middlo box; and a blank space or empty hole, the top box.
The operation is as follows:-Motion is communicated to the shaft b in the usual
manner, and the eccentric cam c gives a lifting movement to the lever d, and this in
turn to the lifter k. In Fig. 1 is shewn the long pin in action, and the lifter k
engaged in notch 4 on rack f, and the bottom shuttle box is elevated for operating
the shuttle belonging to that box. The next move of the pin wheel will present a
short pin, and the lifter will engage in notch 2 on rack e; this will raise rack e,
and since this is geared into the pinion it will revolve the latter, and the rack f
being geared on the opposite side of the pinion will be drawn down when e rises,
and in the same manner c will be drawn down when frises. The raising of the
rack, as before described, revolves the screw or shaft g and screws the nut i to the
right, depresses the end of the lever j, which in turn will put the middle shuttle box
in position for operating that shuttle. The next move will present a blank or an
empty hole in the pin wheel, and the lifter k will engage in the notch 1 on the

page_text: rack e, raising it still higher, and the rack moving the pinion will move the nut i
still farther to the right, and, as before, operating through the lever j the shuttle
boxes will drop them into position for the shuttle to be operated from the top box.
At the next move of the pin wheel a short pin will act; this will cause the lifter k
to engage in the notch 3 on rack f, raising it, and it in turn being geared into the
pinion h will revolve the screw g, moving the nut i to the left; this will raise the
shuttle boxes to operate the shuttle from the middle box. The next move of
the pin wheel will present a blank; this will place the top box in position, as before
described. The next move of the pin wheel will present a short pin, and the middle
shuttle box will be again in position for that shuttle. The next move a blank, and
the top box will be called again. The next move a short pin, calling the middle
box. The next move a long pin, when the lifter & will engage the notch 4 on the
rack f, and this will lift the shuttle boxes to operate the shuttle from the bottom
shuttle box, and the operating parts will be in position, as shewn in Fig. 1 of the
Drawings.
It will be understood that the design or pattern of colours to be woven is con-
trolled by the position of the short and long pins in the ratchet wheel w. In practice
I prefer to use a chain of lags and pegs.
Having thus stated the nature and particulars of the Invention communicated
to me by the within-named James Long, I declare that I claim, the combination
with the racks e and f, mechanism for operating the same and shaft g, provided at
one end with the pinion h, and at the other end with a screw thread of the nut i
and shuttle-box lever j, as and for the purpose specified.
In witness whereof, I, the said Henry Bernoulli Barlow, have hereunto set my
hand and seal, this Twentieth day of November, One thousand eight hundred
and seventy-seven.
H. B. BARLOW. (L.S.)