Improvements in Loom Shuttle Guards.
Year: 1892

page_text: Date of Application, 14th July, 1892-Accepted, 24th Sept., 1892
COMPLETE SPECIFICATION.
Improvements in Loom Shuttle Guards..
I, CHRISTEN REES BONNE of 57-8 Chancery Lane London W.C. Patent Agent
(communicated to me by Alexander Bär of Zschopan in the German Empire,
Manufacturer,) 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 :---
Whereas shuttle guards both when fixed and when movable in a forward and
upward direction are ineffective the former when fixed sufficiently low to be of any
use being in the plane traversed by the lathe or lay the latter lifting too soon and
lowering too late thus being just at the critical moment (that is shortly before or
after the lathe has arrived in the middle of its course) in so high a position that
shuttles flying out low are not caught, the guards constructed according to my
invention never fail to fulfill their purpose and at the same time do neither impede
the movements of the weaver nor do they throw a shadow on the work, but admit
of all necessary operations cleaning, burling, and the like, while the loom is in
motion and present no obstacles to any arrangements or devices for spreading and
stretching the warp or performing any necessary operations without stopping the
motion of the lathe.
Figs. 1 and 10 of the accompanying drawing shew the loom with the said
guard C at the moment the shuttle S passes through.
Fig. 2 shews the same at the moment the lathe is at the extreme left.
Fig. 3 is a cross section (on a larger scale) of the lathe with guard C held by
pendulum moving towards the left.
Fig. 4 shews the lathe when at the extreme left.
Figs. 5 and 6 are a cross section and front view respectively of an arrangement
preventing the guard from moving too far.
Figs. 7, 8 and 9 shew an alternative arrangement for preventing the guard from
swinging too far forward or backward.
Fig. 7 shews the lathe with guard held, moving to the left while the guard
moves in a different direction.
Fig. 8 shews the lathe in its extreme left hand position.
Fig. 9 shews the succeeding motion of the lathe towards the right.
The guard C (which may consist of one or several rods, rails or cross-bars or the
like) turns with its trunnions Z in bearings h. When the guard C is in position
that is when it is acting as guard the distance between its front edge and the lower
beam L of the lathe as well as the distance between its back edge and reed B or
lay-cap D are smaller (shorter) than the transversal diameter of the shuttle S con-
sequently the shuttle is never allowed to deviate from its course (see Figs. 1, 10
and 9).
The guard C (represented in the drawing as a rail) fields to the lightest
pressure from the front while its forward motion is stopped by stops a fixed to
bearings (Fig. 5).
In order to prevent the guard throwing a shadow on the material in process of
manufacture and thus obstructing the inspection of the work and in order to enable
the operator to clean the yarn or arrange the staff-work when required while the
loom is in motion rail C may be held back by mechanical means at each motion of
the lathe.
This may be done in different ways as by means of a lever H striking against the
breast beam B Figs. 1, 2, and 4 or by a lever H' turning on the lay-cap D and
connected by means of strap r with rail C and by means of strap with the frame
(Figs 78 & 91

page_text: When the lathe is moved lever H is pushed back by breast-beam B' (Fig. 4)
respectively lever H' is kept back by strap from the frame (Fig. 8).
Both devices cause guard C to swing back in its peculiar manner the front
edge describing an arc. Obviously the guard leaves the bar L only at the
moment when the lathe is almost at the middle of its course by a distance equal
to the height of the shuttle. This on account of the absolute safety against
jumping of the shuttle thus obtained is of the greatest importance. When the
looms are very wide the arrangement as illustrated by Figs. 5 and 6 may be made
in order to prevent the guard from depressing the front and back limits of its
course. This arrangement consists of a strapon which the rail C is suspended
and which passes over a conveniently shaped roller s fixed to the lay cap D,
Figs. 5 and 6.
The same result is obtained by the arrangement r, H', ' fixed between lay
cap D and the loom frame Figs. 7. 8. and 9. This arrangement suffices even for
the largest looms.
As soon as the weaver, in order not to be impeded in his work, has shifted
(lifted), the guard against the lay cap it is caught and held by the swinging or
pendulum catch fixed to the lay cap D its end being shaped like a hook. When
beating (pulling to) the lathe the guard is lifted off a little from the catch by the
shock and the oscillating power as well as by the action of lever H or H¹, the
swinging catch by means of its gravity occupies a vertical position, its hook recedes
from the guard and allows the latter to descend into position again.
While the lathe is in motion the catch i keeps on swinging on account of its
inertia so as never to catch the guard C.
The strap forming itself into a S-shaped loop (Fig. 8) may under certain
favorable conditions replace the catch when lever His pushed back, but the
catch device is more reliable in its action.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
:-
1) In weavers' looms the arrangement of lever H. holding back the guard when
the lathe is beaten (pulled to) in such a manner that neither the guard nor its shadow
obstructs the inspection of the material in process of manufacture substantially as
described and shewn in the drawings.
2) The use of a swinging- or pendulum-catch i catching and holding the guard
when the loom is at a stand still and the weaver has pushed it back, but not inter-
fering with the guard when the loom is in motion, substantially as described and
shewn in the drawings.
3) In wide looms the arrangement of a strap attached to both the lay cap and
the guard passing over a correspondingly shaped rollers to prevent the guard from
swinging too far substantially as described and shewn in the drawing.
4) The arrangement of lever H, strap r joining same to the guard and strap
to the frame, whereby the guard is actuated and in wide looms prevented from
swinging too far forward or backward substantially as hereinbefore described and
shewn in the drawing.
Dated this 18th day of March 1892
BONNE & Co.,
57 & 58, Chancery Lane, Authorised Patent Agents.