US1581878A

US1581878A - Speed-controlling means for ring-spinning machines and the like

Info

Publication number: US1581878A
Application number: US754076A
Authority: US
Inventors: Shaw John
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1924-12-05
Filing date: 1924-12-05
Publication date: 1926-04-20
Anticipated expiration: 1943-04-20

Description

April 20,1928. 8 1,581,878

J. SHAW SPEED CONTROLLING MEANS FOR RING SPINNING MACHINES AND THE LIKE Filed Dec. 5. 1924 7 8 r r I WW IAvAvAYAYWM u w 4 50 6 a0 MMMlMAh.

' TIME IN MINUTES fiiifi ilfifflli," a rir g spinning mac/1i rze Invenlor: John Shaw,

His Attorneg.

Patented Apr. 20, 1926 UNITED STA rss PATENT \QFFECE...

JOHN SHAW, 01? ST.

QOM A ACQBPORATION on new YORK I SPEED-GONTROLLING MEANS non nino-sr nniiie ancni'nss alto THE nn.

Application filed December 5,1924. Serial vNo. 754,075.

ii-innesbn sea, Lancaster England, have in',

vented certain new and useful Improvements in Speed-Controlling Means for Ring-Spinning Machines, andQthe like, of which the following is a specification.

This invention rel tes to means for controlling the speedot' ring spinning machines and the like, more particularly where the drive is by means of an electric motor the speed of which is varied, in the case of the variable speed alternating current motor by an alteration in the position of the brushes, and in the case of a D. G. shunt wound motor by a variation in the strength of the field current.

It is the practice to vary the speed of the machine, in order to keep substantially constant tension on the yarn, from a slow speed when winding on an empty spindle or a small diameter to a higher speed when winding on a large diameter. Superimposed upon this variation'is a continual increase in speed from the commencement of windiuga bobbin untii close upon the finish-of the winding. It has been found insonie districts that it is necessary to have a period of constant speed at the commencement and finish of a wind, and the object of the present iuventionis to provide for this period.

in carrying the invention into effect the cam operated lever for imparting the reciprocating motion to the speed varying means is mounted on a movable iulcru'm the position of which is varied throughoutlthe wind- 111g of the bobbinn accordance with the speed required.

Fig. 1 illustrates the curve of speed required and Figs. 2 and 3 illustratetwo mechanisms for ei'iecting the result according to the invention.

As shown in Fig. 1, there is a period of approximately a quarter of an hour after the commencement of winding a bobbin during which the speed of the spindle in -revo-- lutions per minute is constant. From that point until the end of the first half hour the speed rises and falls with anincrcasing amplitude; during the next half hour the mean speed continues to rise whilst the amplitude of variation remains the same; then for minutes the reverse operation takes place and for a further 15 minutes the amplitude deon a roller C c'arried by the lever;

' lever-A is shifted during the course of 'WlIiClHlg o'f'a bobbin by means of a crank E connected to'A by a link F. The crank creases until tor the final hall hour the original constant speed is resumed.

The initial period of constant speed has been found to be necessary while forming the base oi the bobbin; the variations required on traverse are then gradually introduced, and when these reach a maximuinthe variation required in accordance with the build is then introduced. 1

The whole of the required variation in the speed controlling means is eitected by the oscillation of a rocking lever mounted on a movable fulcrum. In the modification shown in Fig. 2 the rocking lever A has.

one end A mounted on a movable fulcrum,

while the other end 1& isconnected to the speed-controlling means, in this case through the medium offa link K and bellcrank M asshown. The speed controlling apparatus for the driving motor of the ring spinning machine is indicatedas such on the drawing. The details of this apparatus have notbeen. shown since those skilled in the art will readily supply suitable apparatus for the particular type of driving motor. Aninten mediate 'poiiit oftheleverA is oscillated in time with the traverse, or rise and tall 0i the rin-grail, by means ota cam B,qoperating 'llheintermediate-point of the lever A at which the roller C is pivoted is constrained.toinove in a substantially radial, direction to the cam B by means of a link D, one end of which is pivoted to said-intermediate point and the other end-pivoted t0 ZL' llXCCl POlDC on the frame of the machine. The cam B isdi iven synchronously with the cam or the like operating llllb ring rail. A The position of the fulcrum A of the the Es-makes one revolution during the course i of one buildythe effect of which is to shift the speed controlling means irom its lowest to'highest positionand back again. At the commencement of a build, the crank Bis at the top of its'stroke with the arrangement of the parts shown in Fig. 1. It will now be clear that the speed controlling niechauism receives a backward and forward motion of substantially constant amplitude in t me i with the rise and tall oi thering rail, while the meanspeed is increased and diminished once during the winding of'each bobbin.

In order to give the aforementioned periods of constant speed at the commencement and finish of the build, an adjustable stop G is provided for some part of the mechanism, to hold the roller C out of contact with the cam B, when the point A is in its highest positions, and the adjustment of G will be such that the roller C will be lowered into contact with cam B when the crank E has made a portion of its revolution corresponding to the required period of constant speed. At this time, only the highest portions of the cam will operate the lever A, the amplitude of oscillation of which will increase until A is lowered sufficiently to allow the roller C to make contact with the lowest portion of the cam, from which point onward the mechanism oscillates clear of the stop G with a constant amplitude, but with a position for the speed controlling means changing until crank E reaches the bottom of its stroke. After that the above sequence of operation is reversed.

In the modification'shown in Fig. 3, the roller 0 is mounted at one end of the lever a, and an intermediate point of the lever is the fulcrum which is moved by the crank e. Instead of the link I) for holding the lever A in position endways, as shown in Fig. 2, this modification shows a slot h in the frame of the machine in which a projection on the lever a-siides. The stop 9 in this case acts directly on the lever a. The operation of this modification will be evident from the foregoing description.

Referring to either Fig. 2 or Fig. 8, the structure is seen to be such that the path or motion of the fulcrum of the lever A or a is more or less approximately at right angles to the length of the lever. It is a result of this construction that the motion of the ful crum A or a when the stop 9 is not affecting the action, increases the speed at the high points and low points of the oscillations or decreases the speed at these points as is illustrated in Fig. 1 between the 30 minute and 80 minute marks. More generically stated, this result is secured by reason of the fact that the path of the fulcrum A or a whatever its actual direction may be, has a substantiatcomponent at right angles to a straight line passing through said fulcrum A or (4 and through the point where the cam B or Z) acts upon the lever A or a.

.It is also because the path of the fulcrum A or a is more or less approximately at right angles to the direction of the lever in the mechanisms shown in Fig. 2 and Fig. 3 that the stop G or g cuts off one end of the oscillation of the lever A or a when the fulcrum A or a is in one part of its path and changes the amount of the oscillation which is thus cut off by an amount which varies with the position of the fulcrum in this part of its path. More generically stated, this action is due to the fact that the path of the fulcrum A or a has a substantial component which is parallel to effective direction of action of the cam B or 6 upon the lever A or a.

In the appended claims the rise and fall of the ring rail is termed for brevity, the vibration of this member.

What I claim as new and desire to secure by Letters Patent of the United States, is

1. Apparatus for varying the speed of ring spinning machines and of like machines, said apparatus comprising a movable member, means acting on said member to move one portion thereof slowly to and fro, means acting on said member to cause another portion thereof to oscillate rapidly about the first mentioned portion of said member, the path of the first mentioned portion having a substantial component which is at right angles to a straight line connecting the first mentioned portion with the second mentioned portion, and means connected to a third portion of said member for determining the speed of the spinning ma chine in accordance with the position of said third portion in the course of the motion of the member.

2. Apparatus for varying the speed of ring spinning machines, or of like machines, which have a vibrating ring rail and bobbin winding mechanism, or corresponding elements, said apparatus con'iprising a lever, means acting on one portion of said lever for moving that portion thereof to and fro once in the course of the winding of the bobbins, means acting on another portion of said lever for causing said lever to oscillate about the first mentioned portion thereof as its fulcrum in synchronism with the vibrations of the ring rail, the path of the first mentioned portion of said lever having a substantial component which is at right angles to a straight line from the first mentioned portion to the second mentioned portion, and means connected to said lever at still another portion thereof for determining the speed of the spinning machine in accordance with the position of said third portion in the course of the motion of the lever.

3. Apparatus for varying the speed of ring spinning machines, or of like machines, which have a vibrating ring rail and bobbin winding mechanism, or corresponding elements, said apparatus comprising a substantially straight lever, a crank or the like which makes one revolution in the course of the winding of the bobbins, one point on said lever being connected to said crank so as to be moved to and fro once in the course of the winding of the bobbins, in a path which is approxin'iately at right angles to the length of the lever, a cam which adill) Hit)

vances and retracts synchronously with the vibrations of the ring rail and which normallycoopcrates with the lever at apoint removed from the point where the crank is connected, to advance the lever and allow it to retract about the point at which the crank is connected as a fulcrum, and means con nected to said lever at a third point thereon for determining the speed of the spinning machine in accordance withthe position of this point in the course of the motion of the lever.

l. Apparatus for varying the speed of ring spinning machines, or of like machines, which have a vibrz ting ring rail and bobbin winding mechanism, or corresponding elements, said apparatus comprising a horizontal lever, a crank or the like which makes one revolution in the course of the winding or the bobbins, said crank being connected to one end of said lever to lower and lift it once in the course of the winding of the bobbins, a cam which is rotated synchronously with the vibrations of the ring rail, and which normally cooperates with the lever between its ends to lift it and allow it to fall about its crank operated end as a fulcrum, and means connected to the other end of the lever for determining the speed of the spinning machine in accordance with the position of that end of the lever.

5. Apparatus for varying the speed of ring spinning machines and of like ma chines, said apparatus comprising a movable member, means acting'on said member to move one portion thereof slowly to and fro, means acting on said member to cause another portion thereof to oscillate rapidly about the. first mentioned portion of said member, the path of the first mentioned portion having a substantial component which is at right angles to a straight line connecting the first mentioned portion with the second mentioned portion, and a substantial component which is parallel to the effective direction of action of the means for oscillating the second mentioned portion, means connected to a third portion of said mem her for determining the speed of the spinning machine in accordance with the position of said third portion in the course of the motion of the member, and means for definitely limiting the motion of the third portion in one direction when the first mentioned portion is in one part of its path so that the magnitude of the oscillations of the movable member about the first portion of said member is decreased by an amount which varies with the position of the first mentioned portion in that part of its path.

6. Apparatus for varying the speed of ring spinning machines, or of like machines, which have a vibrating ring rail and bobbin winding mechanism, or corresponding elements, said apparatuscomprising a lever,

means acting on one ,portion of said lever late about thelirst n'ientioued portion there i of as its fulcrum in synchronism with the vibrations of the ring rail, the path of the first mentioned portion of said lever having a substantial component which 1811i? right angles to a straightline from the first mentioned portion to the second mentlQ ilcd portion, and a substantial component which is parallel to the effective direction of motion of the means for oscillating the lever about the first mentioned portion thereof, and

'means connected to said lever at still another portion thereof for determining the speed of the spinning machine in accordance with the position of said third portion in the course of the motion of the lever, and means for definitely limiting the motion of the third portion of said lever in one direction when the first mentioned portion thereof is one part of its path so that the magnitude of the oscillations of the lever about its fulcrum is decreased by an amount which varies with the, position of the first portion of the lever in that part of its path.

7. Apparatus for varying the speed of ring spinning machines, or of like machines, which have a vibrating ring rail and bobbin winding mechanism, or corresponding elements, said apparatus comprising a substantially straight lever, a crank or the like which makes one revolution in the course of the winding of bobbins, one point on said lever being connected to said crank so as to be moved to and fro once in the course of the winding of the bobbins, in a path which is approximately at rightangles to the length of the lever, a cam which advances and retracts synchronously with the vibrations of the ring rail and which normally cooperates with the lever at a point removed from the point where the crank is connected, to advance the lever and allow it to retract about the point at which the crank is connected as a fulcrum, means connected to said lever at a third point tliereon for determining the speed of the spinning machine in accordance with the position of this point in the course of the motion of a the lever, and a stop device which definitely limits the motion of the speed controlling portion of the lever in one direction when the crank controlled portion is in one part of itspath so that the lever is prevented from following the cam in its retracting motion by an amount which varies with the positionof the crank controlled portion in that part of its path.

8. Apparatus for varying the speed of ring spinning machines, or of like machines, which have a vibrating ring rail and bobbing winding mechanism, or corresponding ele-t inents, said apparatus comprising a horizontal lever, a crank or the like which makes one revolution in the course of the winding of the bobbins, said crank being connected to one end of said lever to lower and lift it once in the course of the winding of the bobbins, a cam which is rotated synchroncusly with the vibrations of the ring rail, and which normally cooperates with the lever between its ends to lift it and allow it to fall about its crank operated end as a fulcrum, and means connected to the other end of the lever for determining the speed of the spinning machine in accordance with the position of that end of the lever, and a stop which definitely limits the downward motion of the speed controlling end of the lever when the crank controlled end above a certain point in its path.

In witness whereof, I have hereunto set my hand this 20th day of Novr. 1924-.

JOHN SHAW.