IMPROVEMENTS IN MECHANISM FOR OPERATING SHUTTLE BOXES OF LOOMS
Year: 1884

page_text: I, MATHEW CORRIGAN, of Claythorn Street, Glasgow, in the County of Lanark,
Machinist, do hereby declare the nature of my said Invention for "IMPROVEMENTS
IN MECHANISM FOR OPERATING SHUTTLE BOXES OF LOOMS" and in what manner"
the same is to be performed to be particularly described and ascertained in and hy
the following statement :-
My Invention consists of improvements in the construction or arrangement of
Mechanism for operating the changing shuttle boxes of Looms for weaving.
In the accompanying drawings which illustrate my Invention Figures 1 and 2
are side and end elevations of the framing of a loom showing the improved shuttle
box operating mechanism applied and Figure 3 is a plan of the same.
The improved mechanism which is carried on a frame or bracket. A attached to
the loom frame B consists of an oscillating or beam lever C connected at one end
to the spear D of the shuttle boxes E and at the opposite end by a link F to an
oscillating lever G centred on a stud g on the bracket A. On the lever G at
opposite sides of the centre g are fitted oscillating stepped arins H attached at their
lower ends by a connecting link I to a lever J and rod J¹ operated by the pins on
the ordinary pattern barrel K, the pins being as usual of different heights and
serving (like Jacquard mechanism which may be substituted for the pattern
barrel) to control the extent of motion of the arms H and to bring them into such
position that the desired pair of the steps h on the arms H may be brought directly
under and be acted on by depressing points on a vertically reciprocating bar or
frame L This frame L is reciprocated in guides L¹ by means of a crank pin m on
a wheel or pinion M on the loom shaft M³, the pinion M. being geared to a second
pinion N on which is a crank pin n acting on the lever arm O which actuates the
pattern barrel K in the usual way.
The action of the apparatus is as follows. The pins on the barrel K acting on
the usual pendent lever le impart to the rod or bar J¹ a greater or less extent of
motion according to the height of the pins, and thereby move the stepped arms H
to bring a corresponding pair of the steps h under adjustable points, the highest
step on one arm and the lowest on the other arm H forming one pair, the next
highest and next lowest forming a second pair and so on, and the height of the
operating pin on the barrel determining which pair of steps h shall come under and

page_text: be acted on by the points in their downward traverse. The points / being on the
same horizontal level, in coming in contact with the steps h bring the pair acted on
at any operation to the same level and in doing so oscillate the lever G to a
corresponding extent whereby through the link F and lever C the spear D and
shuttle boxes E are raised or lowered to the desired extent, each shuttle box being
represented by a pair of steps h whose position determine the position of the shuttle
box in relation to the shuttle race. The spear actuating lever C is formed in two
pieces, the two parts being secured together by strong springs c above and below,
which yield and permit of the one piece moving on the other and prevent breakage
of the mechanism in the event of a shuttle being improperly boxed.
To steady the motion of the shuttle boxes when a shift is made a friction strap
or pair of straps p is fitted to grip a grooved pulley P fixed to the oscillating
lever G, such straps being formed with V-faces of leather or other material and
being gripped on the pulley by screw pins p¹ fitted through the ends of the straps,
and provided with adjusting screw nuts. As an auxiliary means of steadying the
shuttle boxes at each shift, a segment Q fitted on the lever C, is formed with a
number of notches corresponding to the number of shuttle boxes, and into the
notches a stud R on a movable arm R¹ engages The stud R is kept in contact
with the segment Q by means of a spring S, which yields and permits of the stud R
disengaging, the lever C is shifted, the pin again falling into the notch opposite to
it and preventing vibration of the lever.
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 ;-
First, The combination of parts forming the improved shuttle box operating
mechanism for looms, substantially as herein described and illustrated.
Second, The arrangement of the stepped arms H operated by the pattern or
Jacquard mechanism, in combination with the oscillating lever G connected to the
shuttle box spear lever, and acted on by the reciprocating frame L substantially as
herein described and illustrated.
Third, The arrangement of the lever C formed in two pieces secured together by
springs substantially as herein described and illustrated.
Fourth, The arrangement of the friction pulley P and adjustable friction straps >>
substantially as herein described and illustrated and for the purpose set forth.
Dated this Nineteenth day of December 1884.
W. R. M. THOMSON & Co.,
Agents for the Applicant.