Year: 1887

page_text: Date of Application, 6th Dec., 1887
Complete Specification Left, 24th Aug., 1888
Complete Specification Accepted, 25th Sept., 1883
I, JOSEPH FARRAR, of Globe Works, Halifax, Yorkshire, Machine Maker, do hereby
declare the nature of this invention to be as follows:
This invention refers to the positive driving mechanism for which prior Letters
Patent were granted to Thomas Coltman, Nos. 8427 and 17497, my invention com-
prising improved mechanism for disengaging the driving wheel and to dispense with
the springs heretofore employed in connection with such said mechanism, thereby
preventing the uncertainty of action and other defects inseparable from the use of
springs.
According to this invention 1 form projections on the upper side of the bevel
driving wheel, or on a disc fixed onto a revolving vertical shaft, upon which said
shaft I also place a flanged boss or an inverted cup, which is free to revolve above the
projections on the upper side of the bevel driving wheel or disc previously referred to.
The flanged boss or inverted cup carries a bell crank form of catch, one end of which,
(so long as the parts are in working order,) is in contact with one of the projections
on the bevel wheel or disc, whereby the flanged boss or inverted cup and parts connected
therewith are taken around and caused to revolve by the bevel wheel, but if the yarn
breaks, the ordinary trap lever, (which we make with two claws or forks) lowers in
such manner as to strike the upper end of the bell crank form of catch, in doing which
the lower end of the caich is released from the holding projections on the bevel wheel
or disc, consequently the flanged boss or inverted cup ceases to revolve, thereby
immediately stopping the make of faulty yarn.
1m 1007
TASKER & CROSSLEY,
Halifax, Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Trap Twisting Frames Employed in Doubling
Yarns.
1. JOSEPH FARRAR, of Globe Works, Halifax, Yorkshire, Machine Maker, 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 the positive driving mechanism for which prior Letters
Patents were granted to Thomas Coltman, Nos. 8427 and 174970, my invention com-
prising improved mechanism for disengaging the driving wheel and to dispense with
the springs heretofore employed in connection with such said mechanism, thereby
preventing the uncertainty of action and other defects inseparable from the use of
springs.
According to this invention I form projections on the upper side of the bevel driving
wheel fixed to and revolving with vertical shaft, upon which said shaft I also place
loosely a flanged boss or an inverted cup, which is free to revolve above the projections
on the upper side of the bevel driving wheel previously referred to. The flanged hoss
or inverted cup carries a bell crank form of catch, one end of which (so long as the
parts are in working order) is in contact with one of the projections on the bevel
wheel, whereby the flanged boss or inverted cup and paris connected therewith are
taken around and caused to revolve by the bevel wheel, but if the yarn breaks, the
ordinary trap lever (which I make with two claws or forks) lowers in such a manner
as to come into contact with the upper end of the bell crank form of catch, in doing
which the lower end of the catch is released from the holding projections on the bevel
wheel consequently the Hanged boss or inverted cup ceases to revolve, thereby
immediately stopping the make of faulty yarn.
In order that my invention may be better understood, I will now proceed to describe
the same more fully, and for that purpose make reference to the accompanying sheets
of drawings illustrative thereof.
Fig. 1 is sectional elevation of so much of a trap twisting frame as is necessary
to shew the application of my invention.
Fig. 2 is elevation of the improved parts on an enlarged scale, and
Fig. is plan view thereof.
C
represents the framework of the machine, the spindle, and the cap, both of
which are driven by the wharle d. The yarns or threads to be twisted or doubled
come from the bobbins e, through eyelets f, around the trap roller g, through another
eyelet and under the guide rod h, and finally through an eyelet in the end of the
hinged trap lever i, all of which are arranged and operated in the ordinary manner.
jis a shaft running full length of the machine, on which are fixed bevel wheel driving
the smaller bevel wheel employed for the purpose of giving rotary motion to the
trap roller 9. On the top of the small bevel wheel I make three or other number of

page_text: projections m (see elevation Fig. 2 and plan view Fig. 4). The bevel wheel is fixed
at the bottom of a short vertical shaft, on which shaft is placed loosely the flanged
boss or inverted cup n, the upper surface of which is made with notches, and enters
corresponding recesses formed at the bottom of the trap roller g, all of such wheels
and notches being employed to give rotary motion to the trap roller g. The flanged
boss n carries a hinged hell crank lever o, the lower end of which engages with the
projections on the top of the bevel wheel so that as the bevel wheel revolves the bell
crank lever is also made to revolve, and consequently the flanged boss h and trap
roller have rotary motion given to them, but on the breakage of one or more of the
threads being doubled, and which are passing through the balanced end of the trap
lever i, the opposite end of such trap lever would lower, as shewn in dotted lines Fig. 2,
consequently the revolving bell crank lever would be caught and raised, thereby causing
the lower end of such bell crank lever to be disengaged with the notches on the top of
the bevel wheel, as indicated in dotted lines, whereby the trap roller would cease to
revolve and discontinue pulling yarn off the bobbins e until the several parts were
replaced in their normal positions. by which means, immediately on the breakage of
a thread, the making of single or faulty yarn is at once put a stop to; and in order to
more quickly lift the bell crank lever from contact with the notches of the bevel wheel
I have made the trap lever with two claws or forks and s, as shewn in Fig. 3, so that
the trap roller will be arrested before it has made one half of a revolution.
દ
Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
In a trap twisting frame, the combination of the driven part 1, bell crank lever o,
and trap lever, all employed for stopping the rotation of the trap roller in manner
substantially as shewn and described.