OR IMPROVED TENSION APPARATUS FOR LOOM. BEAMS
Year: 1884

page_text: I, JOHN IMRAY of N° 28 Southampton Buildings Chancery Lane in the County
of Middlesex, Consulting Engineer and Patent Agent do hereby declare the nature
of the said invention for "NEW OR IMPROVED TENSION APPARATUS FOR LOOM.
BEAMS" and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement, that is to say :-
This invention relates to self adjusting tension apparatus for loom beams, so
arranged that however full or empty the beam may be, the drag pressure, determined
in the first instance, gives uniform tension, thus avoiding irregularities in the
fabric.
:
I will describe the apparatus for this purpose referring to the accompanying
drawings. Fig. 1 is a transverse section through the beam O, Fig. 2 is a front
view and Fig. 3 is a plan shewing the general arrangement of the apparatus, details
of which are shewn by other figures up to 31 inclusive. To the lower part of the
loom frame is fixed a bracket A, shewn in front view and section at Fig. 4 and in
side view at Fig. 5, having a slot a for a bolt so that its height can be adjusted to
the required level. In this bracket is mounted a vertical spindle B having a
horizontal arm b as shewn in plan at Fig. 6 with a rib c at each side and a slot d'
along its middle, to which arm is bolted a bent arm C. The arm b has a boss e in
which is fitted the pin f of a fork D carrying a wooden roller E shewn in end view
at Fig. 8. To the lower framing of the loom is also fixed a bracket F, (see Figs. 9
and 10) on which is mounted by a collared spindle H secured by a nut J a triple
pulley G (see the plans Figs. 11 and 12) surmounted by a guard I secured on the
spindle by nut g. At the ends of the loom frame are fixed shoes J to carry
brackets K which are adjustably secured by bolts passing through slotted holes
(see Figs. 13 to 17) inclusive). The face of each of the brackets K has a slotted
hole for bolting to it a shoe L (see Figs. 18 and 19) carrying the fulcrum pin of a
lever M baving a number of holes through it. One of these holes takes a hook N
(see Figs. 22 and 23) to which is attached one end of the band O. This band
passes partly round the beam and is attached by a screw p (see Figs. 24, 25 and 26)
and thumb nut o to a bracket P projecting from the loom frame. A central
bracket (see Figs. 27 and 28) projecting from the framing and adjustable in
height carries between ribs r a frame R in which is mounted a pulley T by a
shouldered pin a secured by a nutt that serves also to hold the frane R at the

page_text: place where it is set along Q. Through the front part of R there is a hole u through
which a cord can freely pass. The rod C is connected by a cord v to the periphery
of one of the smaller pullies G. From the periphery of the larger pulley G two
cords W extend, guided by T, each to a hole in a carriage U (see Figs. 29 and 30)
in which it is held by a pinching screw x. The carriage U has a wheel V running
along the upper edge of the lever M and is prevented from falling off by a rib z;
it terminates in a hook y carrying the weight S. The levers M should be adjusted
at an inclination of about 1 in 20. In cases where additional weight is required
on the levers M they may be loaded. by springs Y (see Figs. 30 and 31) carried by
brackets X and attached to hooks Z engaging in holes of the levers M. The pullies
are so proportioned and the position of the weights S are so adjusted in the first
instance that while the roller E moves through the depth of the yarn wound on
the beam, the weights S travel along such length of the levers M as will keep the
strain on the yarn constant while it is being unwound from the beam.
Figs. 32 and 33 shew in elevation and plan a modified arrangement. In this
case the levers M which are graduated to shew the load which they exert at P
have the weights that move along them connected by cords W W passing round
a guide pulley T¹ to the periphery of a pulley G on a spindle H free to turn in a
bracket F. On the same spindle H is another pulley G to the periphery of which
is attached a cord V fixed at its other end to an arm C¹, its point of attachment
being adjusted by a pin C¹¹ set in a slot d of the lever C'. On the spindle of C is
fixed the arm carrying the roller E. By means of the screw and nut at P each of
the levers M is set at the desired inclination, the arm is turned to the position
shewn in Fig. 33 and temporarily held there by a hook t¹ hooked at S¹ to the
framing, and the weights having been adjusted by means of the cords to the desired
divisions on the levers M, the arm C¹ is released and the apparatus is ready for
action. For. varying the effect of the weights the pin C" can be set nearer to or
farther from the fulcrum of C¹.
Having thus described the nature of this invention and in what manner the
same is to be performed as communicated to me by my foreign correspondent,
I declare that what I claim is :-
1. The arrangement and combination of the bands NO and inclined levers M
and the loaded carriages running thereon connected by cords to pullies G, with the
arm C and roller E, so arranged that as the roller E approaches nearer to the axis
of the beam O, the weights S approach nearer to the fulcra of the levers M,
substantially as and for the purpose herein set forth.
:
2. The modified arrangement shewn by Figs. 32 and 33, wherein the levers M
have their inclination adjusted by a screw and nut at P, and the loaded carriages
which run on the levers are connected by cords W W pullies G¹ and G and cord V
adjustably to an arm C¹ on the axis of the frame carrying the roller E, substantially
as herein described.
A
1000