Improvements in Shuttle Relief Motions for Looms for Weaving Textile Fabrics.
Year: 1892

page_text: Date of Application, 12th Nov., 1892
Complete Specification Left, 9th Dec., 1892-Accepted, 14th Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in Shuttle Relief Motions for Looms for Weaving
Textile Fabrics.
I, WILLIAM Low, of 11 Stirling Street, Dundee, in the County of Forfar, N.B.
Factory Manager, do hereby declare the nature of this invention to be as
follows:-
This invention relates to looms for weaving textile fabrics, its objects being to
lift the protectors by a positive motion from the wiper shaft at the moment the
shuttle is entering the box, lightly holding the shuttle while there and again
lifting it while the shuttle is leaving such box.
Hitherto in looms the protectors have generally been lifted at the proper
moment by the shuttle acting on the swell, it again actuating the finger, that is to
say the vertical part of the protector which is behind the swell. In broad looms
the force required to do this is considerable, and hence the pick has to be more
powerful than otherwise would be necessary.
In carrying out my invention, I partially rotate the protector shaft at the right
moment by a cam fixed on the wiper shaft. The cam consists of a sleeve which
carries two small rollers placed opposite one another so that as the wiper shaft
rotates they push alternately another and larger roller on the one end of a bell
crank, the other end of such crank being coupled to a crank on the aforesaid
protector shaft.
The cam rollers on the wiper shaft are so adjusted that they, in
turn, by means of the bell crank, lift the protectors when the shuttle enters or
leaves the box, and allow the finger to press against the swell when it is there.
It is to be noted that each cam alternately keeps up the protectors while the
shuttle leaves the one box, crosses the race and enters the opposite box.
Dated this 10th day of November 1892.
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Shuttle Relief Motions for Looms for Weaving
Textile Fabrics.
I, WILLIAM LOW, of 11 Stirling Street, Dundee, in the County of Forfar, N.B.
Factory Manager, 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 looms for weaving textile fabrics, its objects being to
lift the protectors by a positive motion from the wiper shaft, at the moment the
shuttle is entering the box, lightly holding the shuttle while there, and again
lifting it while the shuttle is leaving such box.
Hitherto in looms the protectors have generally been lifted at the proper moment
by the shuttle acting on the swell, it again actuating the finger, that is to say the
vertical part of the protector which is behind the swell. In broad looms the force
required to do this is considerable, and hence the pick has to be more powerful
than otherwise would be necessary.
And in order that my said invention may be properly understood, I now proceed
to particularly set forth the system, mode or manner, in or under which the same
is or may be used, or practically carried into effect, reference being made to the

page_text: accompanying drawings, and to the letters and figures marked thereon, that is
to say :-
Figure 1. (Sheet No. 1.) is a sectional elevation looking on A. A.. (Figure 2.), and
Figure 2. (Sheet No. 2.), is a part front elevation of a loom fitted with my improve-
ments.
In carrying out my invention, I partially rotate the protector shaft 3. at the
right moment by a cam 4. fixed on the wiper shaft 5. The cam consists of a
slieve 6. which carries two small rollers 7. placed opposite one another, so that as
the wiper shaft rotates they push alternately another and larger roller 8. on the
one end of a bell crank or lever 9, the other end of such crank being coupled to a
crank 10. on the aforesaid protector shaft, such motion being communicated by
means of the connecting rod 11. The cam rollers 7. on the wiper shaft 5. are so
adjusted that they, in turn, by means of the bell crank or lever 9, and other
appurtenances, lift the protectors 12. when the shuttle enters or leaves the box 13,
and allow the finger 14. to press against the swell when it is there.
The action of the apparatus is as follows:-In the drawing Figure 1. the loom
is shewn with the crank 15. in that position at which the pick commences, that is
to say at the moment the shuttle is about to leave the box. At that instant the
protector is kept up by the action of the shuttle, but immediately afterwards the
fower cam roller 7. acts upon the roller 8. thus causing the protector to be still
further lifted and upheld until the shuttle enters the opposite box, the force
necessary to keep it up being transferred to the shuttle shortly before it is com-
pletely home. From the foregoing it will be seen that each cam alternately keeps
up the protectors while the shuttle leaves the one box, crosses the race and enters
the opposite box.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
-claim is:-
In looms for weaving textile fabrics,
(1) The improved system, mode, or manner in or under which the same is or
may be used or practically carried into effect, substantially as and for the purposes
herein set forth, together with any mere modification or modifications thereof.
(2) The improved combination and arrangement of parts herein before described
and illustrated in the accompanying drawings.
(3) The application of the cam to the wiper shaft substantially as and for the
purposes set forth, as illustrated and described.
(4) The combination of the double cam rollers, and the lever cam roller, sub-
stantially as and for the purposes set forth.
Dated this 8th day of December 1892.
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Agents for Applicant.