Improvements in or relating to Mechanism for Waxing Thread.
Year: 1896

page_text: Date of Application, 16th June, 1896-Accepted, 22nd Aug., 1896
COMPLETE SPECIFICATION.
Improvements in or relating to Mechanism for Waxing Thread.
I, REGINALD HADDAN, of the Firm of Herbert Haddan & Co., of
18 Buckingham Street, Strand, London, W.C., Patent Agent, do hereby declare
the nature of this invention, a communication to me from abroad by The
Goodyear Shoe Machinery Company, of 158 Summer Street, Boston, in the
State of Massachusetts, United States of America, 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 devices or mechanism for waxing thread, for instance
the thread used in wax-thread sewing-machines; and it has for its object to
provide new and improved means whereby the thread is effectually, thoroughly,
and uniformly waxed by having sections of the thread untwisted, wax applied, and
the untwisted sections subsequently retwisted.
To accomplish this object my invention involves the features of construction, the
combination or arrangement of parts, and the principles of operation hereinafter
described and claimed, reference being made to the accompanying drawing, in
which-
Figure 1 represents a longitudinal vertical section in the plane
Figure 2 is a plan or top view.
xx Fig. 2.
Figure 3 is a transverse vertical section in the plane y y Fig. 2.
The object of my invention is to improve and facilitate the operation of waxing
thread for instance for wax thread sewing machines. In the drawing the letter A
designates a portion of a frame which may be a part of the frame of a wax thread
sewing machine and to this frame is secured the wax pot B. This wax pot is
provided with a vertical spout C, and D is a jacket which embraces the lower
portion of the wax pot B and the spout C. By circulating through this jacket a
heating medium of a uniform and definite temperature such as steam or hot
water, the wax in the wax pot and in the spout can be maintained at the desired
temperature and all danger of overheating the contents of the wax pot is avoided.
If the contents of the wax pot are overheated, the volatile constituents of the wax
or pitch are driven out and the remainder becomes unfit for further use as a medium
for waxing thread.
The pot B communicates with the spout by a channel 10 and the communi-
cation is controlled by a stop cock 11. In the lower end of the spout C is placed
an elastic stopper 12 best made of india rubber which is provided with an axial
passage 13 for the thread and the stopper 12 is exposed to the action of a screw
plug 14 so that the passage 13 can be adjusted and as the waxed thread is drawn
through this passage, the surplus wax adhering to the thread is retained in the
spout C.
With this thread waxing device is combined a mechanism for untwisting and
retwisting the thread in such a manner that the melted wax comes in direct
contact with the different strands of the thread, and after the thread has been
retwisted, uot only its outer surface but also the interior of its body has been
waxed. The device for untwisting and retwisting the thread is constructed as
follows: to the frame A is firmly secured a standard 15 which is firmly connected

page_text: to a standard 16 by means of a bracket 17. On this bracket are secured guides 18, 18
by means of screws 19 and these guides engage grooves 20 formed in the upper
and lower edges of a rack bar 21 which engages a pinion 22. This pinion is
mounted in a frame 23 from which extends a stud 24 that engages a lever 25
fulcrumed on a fixed stud 26 and the frame 23 is movable up and down in the
standards 15 and 16, such movements being produced by the action of the lever 25
which is actuated by a suitable cam (not shown).
To the rack bar 21 is connected a lever 27 by means of a pivot 28, said lever
being actuated by a suitable cam (not shown), so that a reciprocating motion can
be imparted to the pinion 22. In this pinion is secured an elastic stopper 29 which
is provided with an axial thread passage and rests upon a metallic plug 30 also
provided with an axial thread passage. In the upper part of the pinion 22 is
secured a metallic screw plug 31 which is also provided with an axial thread
passage and which serves to compress the elastic stopper 29 to such an extent that
it grasps the thread with the 'requisite degree of firmness.
The movements of the levers 25 and 27 are so timed that during the downward
movement of the frame 23 and the pinion 22 this pinion is rotated by the action of
the rack bar 21 in the direction to unwind that portion of the thread which extends
from the elastic stopper 29 down through the wax contained in the spout C to the
elastic stopper 12 and is grasped by these stoppers sufficiently tight to prevent it
from turning round therein, so, that this portion is not only untwisted but also
rendered slack by the downward movement of the pinion 22 and consequently
an untwisted slack portion of thread is exposed, to the action of the wax in the
spout.C so that each single strand of the thread will come in contact with the wax.
By reversing the movement of the levers 25 and 27 the pinion 22 is moved up
.and at the same time the rack 21 causes the same to revolve so as to retwist the
thread.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. The combination with mechanism for untwisting sections of thread, of a wax
pot, and means for applying melted wax to the said sections of thread while
untwisted, and means. for retwisting said sections of thread, substantially as
described.
2. The combination with a wax pot. having an approximately vertical spout
through which the thread to be waxed passes, means for untwisting sections of the
thread lying within the melted wax in the spout, and means for subsequently
retwisting the waxed thread sections, substantially as described.
3. The combination with a wax pot having an approximately vertical spout
open at its top and provided at its lower end with a contractible thread passage,
mechanism for untwisting sertions of the thread for receiving the melted wax
contained in the spout, and means for retwisting the untwisted sections after they
have been waxed, substantially as described.
4. The combination with a wax pot having an approximately vertical spout into
which the melted wax from the pot is delivered, of a pinion having a thread
passage through which the thread passes into and through the spout, a thread
passage arranged-at the lower end of the spout and constructed to yieldingly grip
the thread passing therethrough, and mechanism for reciprocating the pinion,
whereby the thread sections are untwisted, the melted wax applied, thereto,
and the waxed untwisted sections subsequently, retwisted, substantially as
described.
5. The combination with a wax pot provided with a substantially vertical thread
passage, of a pinion provided with a substantially vertical thread passage, and
mechanism for rotating this pinion alternately in opposite directions and also for
in parting to this pinion a rising and falling motion, substantially as described.

page_text: 6. The combination with a wax pot, of mechanism for untwisting and retwisting
successive sections of thread while the same are in contact with the melted wax,.
substantially as described.