US2482443A - Operating means for electrically driven textile machines - Google Patents

Description

Sept. 20, 1949. E. TORNROS OPERATING MEANS FOR ELECTRICALLY DRIVEN TEXTILE MACHINES Filed; Feb. 7, 194a Wye/12b 0 @1773? r05 3y Patented Sept. 20, 1949 OPERATING MEANS FOR ELECTRICALLY DRIVEN TEXTILE MACHINES Eugen Tomi-s, Vasteras, Sweden, assignor'it'o Allmanna ,Svenska. Elektriska. Aktiebolaget, Vasteras, Sweden, acorporationof'sweden g, p Appiication February '1, 1948,- Serial No, 6,977-

f I In Sweden April 23, 1946 Section 1, Public Law 690, August a, 1946 Y Patent expires April 23, 1966 Incertain working machines in the textile industry there is a requirement for feeling by means.

ofan electrical contact acting directly on the goods undergoing treatment in the machine. Thus in flat cards, combers, drawing frames etc., in which the goods leave the machine as a loose sliver, it is required that a feeling contact disconnects the driving motor, if for some reason the-sliver should burst..

-In strenters and similar machines, the loose cloth is fed in spread condition into the machine between two endless chains provided with clips or pins which hold the cloth. In that part of the; machine, where the cloth is fedin,v the chains:

are arranged in turnable arms, so that the distance between the chains successively increases and in such a manner the cloth is stretched out to; normal width before it is fed into the drying chamber, whereafter the chains run parallel.

Each arm is arranged at the feeding end on a screw spindle, which is operated by an electric motor through a reversing switch and a feeder control switch consisting of a contact apparatus, which is operatable by means of a feeler pressing against the selvedge of the cloth and automatically, through the motor, adjusts the arm into such a position that the edge ofthe cloth is caught b the clips or pins. I In all the casesdescribed above the pressure which the feeling member of the feeder control, i. e. the feeler, can be allowed to exerton the goods is so little that a satisfactory contact pressure cannot be obtained. Further it is desirable in strenters and the like that the margin of obliquity of the slevedge of the cloth is entirely utilized so that the number of adjusting impulses is reduced as far as possible. The operating intensity of the feeder control switches of a strenter often amount to about 1000 times per hour or more which demands very much of the motor and the operating member. In order to solve this problem the feeder control, according to the present invention, is made so that a permanent magnet operating the contact apparatus and turnable by means of the feeler is inserted between the contact apparatus and the feeler. By this means the adjusting power of the contact apparatus will be independent of the power with which the feeler is pressed on to the goods and its range of insensibility, which is the turning angle described by the magnet in order to operate the contact apparatus, can be easily adjusted with regard to the margin of obliquity of the cloth.

Theinvention will now be described with reference to the accompanying drawings, in which,

scams. (0]. 200-52) Figure 1 is aperspective view, showing the principal design of the feeder control, and. Figure 2 is a plan view of one of the contacts as seen from above in Figure l.

Referring to the drawings the feeder control consists of a shaft [which is turnably journalled in aframe 2, One end of the'shaft l carries a feeler, 3 which bymeans of a springs is held pressedagainst the edge of thecloth 5 which is moving in the direction of the arrow. On the other end of the shaft there is a circular permanent disc magnet 6, the peripheral surface of which isprovided with. a groove 1. The-edges 8 of the disc. oneither side of thegroove, 1 form the poles of the-magnet," Over ,a; certain part of its circumference the diameter of the disc is re-, duced. In Figure 1 the upper partof the disc; has a smaller diameter than the lowerpart. The places where the disc passes from large to small diameter have the designations 9, l0. s

- In the form of the invention shown Figure 1 two contact apparatuses are arrangedoneacli side of the magnet. Each contact apparatus con-,

sists of a fixed contact. H and a movable contact l2 'which is pressed against thefixed contact by means of a spring I3. The spring 13 is provided witha soft iron armature M which is attracted by the disc magnet when the larger diameter of the latter isbefore it, with the result that contacts ll, 12 are opened. When'the smaller diameter of the disc magnet, however, is beforethe armature, the force of the spring [3 predominates and the contacts ll, I2 are closed.

In order to prevent the armature M from touching the disc magnet and hindering its movement, the armature is provided with a stop which is more clearly shown in Figure 2. The movable contact is formed with a contact head 12 and a smaller part l5, which is connected with the spring I3. Between the contact head If! and the spring i 3 a fixed stop I6 is arranged. The smaller part [5 of the movable contact passes through a hole ii in this stop. When the armature I4 is attracted by the disc magnet 6, the motion of the movable contact is limited by the back part of the contact head l2 coming into contact with the stop It which is so arranged that there is always an air gap between the armature l4 and the edges 8 of the disc magnet.

In Fig. 1, the parts 9, it between large and small diameter of the disc magnet 6 are before the armatures M. In this position the contacts ll, !2 on the two contact apparatuses are opened. If the cloth 5 does not run evenly but moves an angle 0:1, to the left, the feeler 3 follows this move- 3 mnt. The shaft I and the disc magnet 6 are thus also turned through the same angle, so that the smaller diameter of the magnet comes before the armature I4 o; the cpntacti arrangement to the right, the contacts of which are closed, as the spring force of the spring I3 in this position predominates. Hereby the driving motor of the regulating arrangement of thei cloth. is started in such a direction that the cloth is-carr-ied tothe right until the feeler 3, theshait I and the magnet 6 are turned back tg their qrig inal pqsia tions in which the armature I4 qf the r,ight -cQQ- tact arrangement is again attracted and its contacts I I, I2 are opened, so stopping the regulating;

arrangement of the cloth.

l 5 If the cloth moves an angle a2, tp;t 1qe right thcsame procedure is repeated with theldifierence that it is now the left contact apparatus whjch is actuated and which starts the driving motor of the regulatin arrangement of the cloth in such a direction that the clothis-carried to thezleft until its mean position is-reachedoncemore.

The angle oz, bywhich the feelenis moved-tonne side or the other forms-the margin of--obliquity, within which the clothis allowed to movesidewards. When the placesa; I0 are before thearmature, as shown in Figure 1=, the margin ofobliquity is aminimum, as-onlya ver-y small-angular movementpf-the feelerisrequired -to-cause--.

the contactapparatu-ses to make regulating-impulses to one side or the-other.-

The margin of: obliquity-can be increased by movingthe two contact apparatuses against each other around'the disc magnet; so-that the latter must move through a largerangle before theplaces 9,- Iii pass the respectiv armatures I4-. Referring to Figure; 1- this is efiectedby-turning the adjusting screw-| 8-inthe direction of the arrow, whiclrcauses the bridge I9; and'trun nions 2B, 2 I fixed thereto, to be pressed downwards. lihe trunnions 2 9, 21-111 their turn press on their respective sheaves 2 2; 23 which are turnably journ all'ed on thebushin 24; which is fixedto the frame?- and also serves as bearing for the shatt- I; raeturniu angm of the sheaves is limitedby e ize ifih a ah. e he es he. i n 91?. 5; fisedi i he ra h m e- 3%.? q w i 3 5.? i r t r its 'b u h i 911 whi h at ls fixed to, the, ram h ave re. u n d: i p s te irec on i h.

the shaft I as turning centre and a spring 18 is arranged to exert the required counter-pressure, As the right contact apparatus is fixed on h h i i fi a d= e t one on h i h e 23, the two contact apparatuses will thus turn against each other with the same turning centre as the magnet 6. The farther the armatures of the contact. apparatusea are adjusted away from the pIacesBHiLoV-er the portion of larger diameter of the magnet the larger the range of insensibility oi the apparatus w ill be, which means a larger marginof-obliquity for the cloth, which easily can be adjusted to the suitable value.

I claim-asmy-invention:

11 Operating mechanism for an electrically driven textile; machine, having means for controlling the; lateral position of goods traveling through the machine, comprising a feeler directly feeling the traveling goods, a permanent magnet turned by said feeler, said permanent magnet forming a circular -dischaving apart reduced in diameter-ands, groove-allaround the circumfer' ence of-the disc,- anarma-ture for the-magnet a contact device, a Spring moving. theicontact dec vice-in onedirection; said device beingoperated:

bythearmature-against the action ofsaid springwhen attracted by the. said magnet when the; latter is turnedby saidlfeelersothat thatpartvof; the magnet having the larger diameter is before. the-a-rmature,. and: a. stop. device. preventing the arr-nature from. touching. the imagneti 2. Operating meanslaccording I to-.c1aim 1: com. prising means for turning the contact devicev aboutithe axisiofsthe permanentimagnet;

3; Operating mechanism according to claim 1, comprising apair:- of said: contactdevices, and means whereby such devices; are turned: with. equal: an-gulan movements in opposite; directionss about-the axis ofthe ipermanentimagnet.

EUGEN ToR Ros;

REFERENCES CITED The following references are of record in the llaoi; Pat n UNITED STATES PATENTS.-

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