Improvements in Yarn-twisting Machines.
Year: 1889

page_text: Date of Application, 22nd July, 1889
Complete Specification Left, 22nd Apr., 1890-Accepted, 24th May, 1890
PROVISIONAL SPECIFICATION.
Improvements in Yarn-twisting Machines.
I, DAVID RATTRAY MALCOLM, of the firm of Malcolm, Ogilvie & Co., Constable
Works, Dundee, in the County of Forfar, Jute Spinners and Manufacturers, do hereby
declare the nature of this invention to be as follows:-
The object of my invention is to twist one or more threads together, in an
improved manner, and by means of improved machinery. My improved machinery
may be used for twisting together threads of jute, flax, hemp, or any other suitable
material.
In carrying out my invention, according to one modification, I employ a horizontal
double ended flyer, suitably supported in journals.
Within the flyer and hanging from projecting pins, or from the extremities of the
spindles is a cradle for carrying the bobbin or bobbins, upon which the thread or
threads which have to be twisted are wound. Said cradle is weighted; so that it
may remain stationary when the flyer is rotating. On one end of the cradle are a
series of ramshorn hooks or eyes, which conduct the material, to a hole bored in the
axis of the flyer.
At the other end of the flyer, and fixed to the framing of the machine, are a series of
differential pulleys, for the purpose of drawing the twisted material from the bobbins
on the cradle, and delivering to the receiving bobbin. These pulleys may be made to
draw the twisted material, at any suitable speed.
The action of the machine is as follows:-
The bobbin, or bobbins filled with thread, are placed on pins on the cradle, and each
thread is passed through a separate ramshorn hook or eye, on the cradle.
The material then passes through the hole bored in the axis of the flyer spindle, and
passing out through a hole at right angles to said axis of spindle, is conducted to a guide
at the outer circumference of the flyer. When it arrives there-the machine being in
motion the material is twisted once. The material then passes over to a similar guide
at the other end of flyer, through a hole at right angles to the axis of spindle at that
end out through another hole bored in the axis of said spindle, and passing around the
differential pulleys; proceeds to the receiving bobbin. When the material leaves the
flyer, it gets another twist for each revolution of same.
Although preferably, I use a machine with a horizontal flyer; yet I may modify
the details of same, so as to suit a vertical flyer.
181
1000
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Applicant's Agents.
COMPLETE SPECIFICATION.
Improvements in Yarn-twisting Machines.
I, DAVID RATTRAY MALCOLM, of the firm of Malcolm, Ogilvie & Co., Constable
Works, Dundee, in the County of Forfar, Jute Spinners and Manufacturers, 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:-
The object of my invention is to twist one or more threads together, in an
improved manner, and by means of improved machinery. My improved machinery
may be used for twisting together threads of jute, flax, hemp or any other suitable
material.
The accompanying sheets of explanatory drawings illustrate the method of carrying

page_text: out my invention according to one modification. Figs. 1. and 2. (Sheet No. 1.)
represent a section at B. B. and an end view looking on C. C. and Fig. 3. (Sheet No. 2.)
a front view of the machine.
In these drawings the same reference numerals are used to mark the same or like
parts, wherever they are repeated.
In this modification, I employ a horizontal double ended flyer consisting of two
steel discs 4. bound together with bolts 5. and supported in journals 6. and 7. by
means of the naves S. and 9. and the shaft 10. Within the flyer and hanging from
projecting pins 11. and 12. forming the extremities of the spindles, is a cradle 13. for
carrying the bobbin or bobbins 14. upon which the thread or threads which have to
be twisted are wound. Said cradle is weighted at 15. so that it may not rotate when
the flyer is revolving. On one end of the cradle is a series of ramshorn hooks or eyes 16.
which conduct the material to a hole 17. bored in the axis of the flyer. At the other
end of the flyer, and fixed to the framing of the machine is a series of pulleys.18.
and 19. for the purpose of drawing the twisted material from the bobbins 14. on the
cradle 13. and delivering to the receiving bobbins 20. These pulleys 18. and 19. may
be made to draw the twisted material at any suitable speed by altering the ratio of
the wheels 47. 48. 49. and 50. The action of the machine is as follows:-
The bobbin or bobbins 14. filled with thread are placed on pins on the cradle 13.
and each thread is passed through a separate ramshorn hook or cye 16. on the cradle.
The material then passes through the hole 17. bored in the axis of the flyer spindle,
and passing out through a hole 21. at right angles to said axis of spindle is conducted
to a guide 22. at the outer circumference of the flyer. When it arrives there-the
machine being in motion-the material has been twisted once for one rotation of the
flyer. The material then passes over to a similar guide 23. at the other end of
the flyer, through a hole 24. at right angles to the axis of spindle at that end, out
through another hole 25. bored in the axis of said spindle, and passing around the
pulleys 18. and 19. as often as may be found suitable, proceeds to the receiving
bobbin 20. being guided there by the pulleys 26. and traversing rod 27. When the
material leaves the flyer it gets another twist for each revolution of same.
The flyers
are driven by the fast and loose pulleys 28. from pulleys 29. on the driving shaft 30.
the belts being guided by pulleys 31. and 32. The driving shaft is made to rotate by
means of the fast and loose pulleys 33. from a suitable source of power. The receiving
bobbins 20. are driven by the bevel wheels 36. actuated by the shaft 37. which is
driven by the pulleys 34. and 35. The traversing rod 27. is moved by the chains and
pulleys 38. these chains and pulleys being moved by the chain 39. and pulley 40.
Motion is given to said pulley 40. by the lever 41. cam 42. and worm and worm
wheel 43. which are made to rotate by the bevel wheels 44. The pulleys 18. and 19.
are geared together by wheels 45. coupled together by an intermediate 46. Their
rotation is caused by the flyer acting through the spur wheels 47. 48. 49. and 50. and
the bevel wheels 51.
The receiving bobbins 26. are made to rotate by means of discs 52. (see Fig. 2.
Sheet No. 1.) keyed to the upright spindles 53. and having metal discs 54. resting
upon them with washers of cloth 55. between. The friction between these discs and
the cloth washer is sufficient to rotate the loose disc 54. and with it the bobbin 20.-
the bobbin and the disc being made to rotate together by the stud 56.
Although preferably I use a machine with a horizontal flyor, yet I may modify the
details of same, so as to suit a vertical flyer.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
(1) In yarn twisting machines, the use of a rotating flyer in combination with a
stationary cradle for giving a double twist to the yarn, substantially as described.
(2) In yarn twisting machines, the combination of the pulleys 18. and 19. with the
rotating flyer and stationary cradle, substantially as, and for the purposes set forth.
(3) In yarn twisting machines, the combination of the traversing motion with the

page_text: pulleys, 18. and 19. the rotating flyer and stationary cradle, substantially as and for
the purposes set forth.
(4) In yarn twisting machines, the general construction, combination and arrange-
ment of parts, substantially as and for the purposes herein set forth, together with any
mere modification or modifications thereof.
(5) The method and means for driving the receiving bobbins 20. by friction sub-
stantially as described.
Dated this 19th day of April 1890.
GEO. C. DOUGLAS & Co.,
Applicant's Agents.