Improvements in Automatic Shuttle Guards for Weaving.
Year: 1894

page_text: Date of Application, 5th May, 1894-Accepted, 23rd June, 1894
COMPLETE SPECIFICATION.
Improvements in Automatic Shuttle Guards for Weaving.
We, JOSEPH THORNTON of Junction Mills, Shipley, in the County of York,
and HENRY THORNTON, of the same place, Manufacturers, 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 shuttle guards, and has for its
object the construction of the same in such a manner that, the guard is automatically
placed in such a position on starting the loom that, it is impossible for the shuttle to
leave the loom should it be diverted from its ordinary course.
In order that our invention may be fully understood, reference is made to the
accompanying sheet of drawings in which
Fig. 1 represents a view of a detached lathe of a loom with our improved
automatic guard bar fitted thereon.
Fig. 2 is a plan of same and a portion of the loom frame.
Fig. 3 is a sectional elevation through line a. b. and
Figs. 4 and 5 detail sections showing a modification of the apparatus.
Fig. 6 is an enlarged sectional detail.
The lathe A. reed B. and top rail C. of the loom are of the ordinary construction,
and to the top rail C. we secure a guide bracket D. of light sectioned steel so that
it will yield when required and is bent at the bottom into hook form for the purpose
of supporting the centre of the guard bar F. when it is in position for protecting
or guarding the course of the shuttle.
To each upright sword W. of the loom is secured a bracket D¹ to each of which
is jointed an arm E. the opposite ends of the arms being connected to or forming a
part of guard bar F. extending across the loom from near the entrance of one
shuttle box G. to the other G' and at such a distance above the warp threads that
they are free to be operated.
To the ordinary rocking shaft H. is secured a short bracket J. supporting a
lever L. to which a spring S. and chain R. are respectively connected, the spring S.
keeping the chain R. in tension. The lever L. and one of the arms E. at E' are
connected by a rod N. for the purpose as herein before described.
The knock off rod T. is connected to lever L. by bracket M. and chain R. and
on starting the loom, the lever L. is pulled in an upward direction by the chain R.
placing the guard bar F. in such position as will prevent the shuttle from flying
away out of its path. Upon stopping the loom by the operation of the knock off
rod T. in the ordinary manner, the chain R. is released, and by the contraction of
the spring S. the levers L. and E. are moved to a position somewhat as shown by
dotted lines in Fig. 3 thus raising the guard bar F. clear of the reed B, and warp
threads; thus affording facilities for the latter to be examined and repaired. The
locking of the guard bar F. in the requisite position when the loom is stationary or
in motion, is accomplished by the spring S. and chain R. in combination with the
knock off rod T. the latter resting in the narrow or wide portion of the slot hole K.
A modification is shown by details Figs. 4 and 5 by which arrangement the
lever L. is dispensed with. Instead of the spring S. being connected to the lever L.
as before described, oue end of the spring which is indicated by S¹ is connected to
an upright sword W. and the opposite end to the armi E. at E2. On starting the
loom by the knock off rod T. the chain R. becomes tight, pulling the rod N. in an
upward direction and operating the arm E. so that the guard bar F. is brought into
position for protecting the course of the shuttle, the said guard bar resting in the
hook end of spring bracket D'. When the loom is "thrown off" the chain R. is

page_text: released, and the spring S₁ contracting, pulls at the arm E. to which it is attached
in a downward direction, throwing the guard bar F. up against or near to the top
rail C. so that the operator is enabled to have free access to the reed B. and warp
threads.
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 general arrangement and combination of the parts forming the complete
apparatus for operating the guard bar F. substantially in the manner and for the
purpose as hereinbefore set forth.
2. The combination of the knock off rod T. with the chain R. lever L. and
spring S. substantially in the manner and for the purpose as hereinbefore set forth.
3. The combination of the guard bar F. the levers E. spring S₁ and intermediary
connection with the stop rod T. arranged substantially in the manner and for the
purpose as hereinbefore set forth.
JOHN WAUGH,
Agent.