Improvements in Drawing Frames for Preparing Fibrous Materials,
Year: 1892

page_text: COMPLETE SPECIFICATION.
Improvements in Drawing Frames for Preparing Fibrous Materials,
I, JAMES ELISHA CHEETHAM, of the firm of Asa Lees and Company Limited,
of Soho Iron Works, Oldham, in the County of Lancaster, Foreman of the
Carding Department, 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 :-
My invention relates to drawing frames for preparing fibrous materials, and the
object of my invention is to stop the frame more quickly when a sliver of the
fibrous material breaks at the back or front of the machine than has hitherto been
possible.
And in order that my invention may be fully understood and readily carried into
effect I will describe the accompanying two sheets of drawings reference being had
to the figures and letters marked thereon.
to
Fig. I is an end sectional elevation of part of a drawing frame made according
my invention,
Fig. 2 is a front view of part of the same and
Fig. 3 is a view of an alternative arrangement of one part of the machine.
In Figs. 1 and 2,-a is part of the frame of the machine, a plate which carries
brackets 6 for the balanced back spoons c which have hooks or projections c¹,
and d is a plate at the front of the machine supported by stands a¹ bolted to the
frame a; to the underside of the plate d are pivoted at d balanced levers e which
have hooks or projections e and carry the front funnels f. The balanced back
spoons c are adjusted in the ordinary way so that when a sliver breaks or fails the
corresponding spoon c is acted upon by a striking lever 9 secured to a shaft
which is caused to oscillate by means of an eccentric i mounted on a shaft i carried
by a bracket j bolted to the frame a, the eccentric is surrounded by a strap k at
one end of an arm weighted at k¹ and carrying at its end a stud 2 which normally
rests at the bottom of a V slot in a bar which is secured upon and carried by
the shaft h; the to and fro movement of the eccentric is imparted to the bar
which causes the shaft h and striker g to oscillate so long as the stud k³ rests in the
bottom of the V groove.
On the oscillating shaft h is a short arm m pivoted to one end of a rod n which at
the other end is pivoted to the arm of a lever g fulcrumed on a stud p carried by
one of the stands a¹; the upper portion of the lever 9 moves to and fro under the
free end of a balanced lever e and acts as a striker to engage with the lever e when
a sliver breaks.
When the drawing frame is in motion and all the slivers are passing through the
back spoons c and front funnels f the oscillating strikers 9 and q move backward
and forward without encountering any obstruction; but in case a sliver passing
over a back spoon breaks or fails the lower or weighted end of the spoon c swings
down in the path of its striker g which catches the projection c'either on its
forward or backward stroke and before the striker can make more than half a
complete stroke its movement is arrested and the stud k² moves up one path of the
V groove thereby coming under and lifting the end of a lever pivoted at r¹ and
moving back its hooked end from a projection s' on the starting rods thereby
allowing a spring, not shown, to draw the rod s in the direction shown by the
arrow in Fig. 2 and move the driving strap from the fast to the loose pulley
and stop the machine before the broken end of the sliver is drawn into the drawing
rollers t.
11
In a similar manner if a sliver breaks between the rollers t and the funnels f
its balanced lever e falls and the projection e¹ thereon lies in the path of its

page_text: striker whether the latter is moving backward or forward whereby the stud ³
is caused to move up the V slot and stop the machine as before described.
In Fig. 3 the bar has a boss 12 which is mounted loosely upon the oscillating
shaft and has a V recess in one face; a collar w fitted on a sliding key in the
shaft h has a projection w¹ which is pushed into the corresponding recess in the
boss by a spring v until one of the strikers g or q is arrested when the boss / will
be turned on the shaft h thereby forcing back the collar w which by a projection w³
thereon lifts the end of the lever r and unlatches the starting rods and so stops the
machine.
By making the stop motion double acting both at the back and front of the
machine it is practically impossible for damaged sliver to enter the funnel or for a
single end to reach the drawing rollers as in the event of a sliver breaking or
failing the machine is stopped almost instantaneously.
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 a drawing frame an arrangement of mechanism, wherein on the breakage
or failure of a sliver the corresponding spoon or funnel lever as the case may be
will intercept an oscillating striker whether moving backward or forward and :
thereby cause the machine to be stopped.
2. The general combination and arrangements of parts embodying my improve-
ments in drawing frames substantially as herein set forth for the purpose specified.
Dated this 9th day of December 1892.
H. B. BARLOW & GILLETT,
17, St. Ann's Square, Manchester, Agents for Applicant.