US2135373A - Magnetic loom - Google Patents

Description

INSULATION lrsLlLA-non P. E. WILSON MAGNETIC LOOM Filed July 6, 1955 4 Sheets-Sheet 1 QUL WILSON gnam/wm "Nov. I, 1938. f A PQB. WILSON A' MAGNETIC LOOM "1 Filed July 6, 1936 lNSuLATIoN I Jn/umm PAUL WILSON P. B. WILSON MAGNETIC Loom x Nov. `1, 1938.

Filed July 6, 193B 4 Sheets-Sheet 3 I lllllllllllll rWc/rvm [Si @USL wlLso Nov. l, 1938. P. a. WILSON MAGNETIC LOOM l-1=i1ed July e, 193e 4 Sheets-Sheet 4 PAUL [5N/1.5m

atenie Nov. 1, 1938 MAGNETIC LOOM raul n. wilson, Greenwood, s. o., mimior vone-half to Lucius K. Etheredxe, North, S. C.

Application .my c, feas, sei-lai No. 39,101

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'This invention relates to a shuttle actuating mechanism for looms and more particularly to the application of a tiges phase alterna t l g glllr ent 'Wind-media the lay of a iom'sh a manner 'tht'th current in the winding will set up a mag- ,netic iiux in the shuttle to cause the same to be moved. When a suitable winding is placed inthe lay of the loom. similar to the commonly known winding in a squirrel-case motor and the current is introduced into this winding, the magnetic action of this current induces an opposing current in a suitable short circuitedcgpper ban d around the shuttle and the reaction between the two currents drives the shuttle across the loom. In other words, the circulating current induced in the copper bands around the shuttle sets up a magnetic aeidln oppositicatdthastawr ilsives the shuttle a resulting iorceina direction parallel to the stator winding and at a right angle to the stator iiux.

The winding in the lay of the loom corresponds to the stationary magnetic field in a standard squirrel-cage motor, whereas, the copper bands around the shuttle correspond to the rotor in said motor.

It is, therefore, an object of this invention to provide a suitable winding in the lay of a loom for using alternating current and thereby, make it possible to obtain a positive moving field at all times which `will impei the shuttle back axfd forth across the lay of the loom.

It is a further object of this invention to'provide a suitable 4reversing switch in the electrical hook-up which is operat ecly the movement of;

the laytdirevers'e thecurrent` and caus-zfistantly moving magnetic field tgubemrevrsed to throw the shuttle in the opposite direction. 'I'his reversal "offorce drives the shuttle back across the loom and the operation is repeated for every 40 pick of the loom. 'I'he speed of the shuttle can be adjusted by varying the frequency of the alter nating current.

It is a further object of this invention to provide an electrical hook-up adapted to receive alternating current for propelling a shuttle back and forth across the loom with means for reversing sal d current before the shuttle has reached theend of the lay, thereby, provlding'iaetightake for smartsite Shetaand reverifadirecaonar 'traveL By' making this reversing switch adjustable it is possible to eliminate check straps and the like, which are necessary in the conventional loom for arresting the shuttle at the proper time.

Some of the objects of the invention having been stated, other objects will appear as the de- (ci. 13s-134i scription proceeds when taken in connection with the accompanying drawings, in which:-

Figure' 1 is a front elevation of portions of a loom showing the invention applied thereto;

Figure 2 is a sectional plan view taken along 5 the line 2 2 in Figure 1;

Figure 3 is a transverse sectional view taken along the line 3-3 in Figure 1;

Figure 4 is a transverse sectional view taken along the line 4-4 in Figure 1; 10

Figure 5 is a plan view of the left-hand end of the lay of the loom showing the windings and their relation to the laminated plate structure;

Figure 6 is a schematic view showing the windingstin each of the coils shown in Figure 5; 15

Figure '7 is an isometric view showing the laminated structure with slots therein which are adapted to receive the three phases of alternating current winding;

Figure 8 is a schematic wiring diagram of the 20 invention.

Referring more specifically to the drawings, the numerals i0 and l0' indicate suitable end frames of a loom. In the lower portion of the loom there is` mounted for oscillation a suitable 25 rocker shaft i2. Fixedly secured to shaft i2 are swords I3 and i3' which have mounted on the upper ends thereof a suitable lay broadly indiqated by the reference character H which has secured to its ends shuttle boxes i5 and i5 30 for receiving the shuttle and expelling it therefrom `in its recprocatory movement across the loom. Secured to the upper portion of the lay of the loom and at the central portion thereof is a conventional reed i6 through which the warp 35 is drawn.

In the regular operation of the loom theJaiLL oscillates back and orthboug,themockenshait hii while the shuttle in the lay of the loom moves longitudinally on the lay to carry the filling baci: 40 and forth through the warp. Heretofore. it has been necessary to provide suitable picker sticks at each end of the lay for imparting to the shuttle the necessary inertia to cause it to be thrown back and forth across the loom. 45

'I'his invention provides a standard alternating current winding in the lay of the loom for obtaining a positive moving field which will carry the shuttle across the loom in one direction and means for reversing the direction of this ield 50 at the proper time are also provided to cause the shuttle to be carried in the opposite direction.

In order to furnish the necessary vcurrent for the operation of the device, to be hereinafter described. suitable lead-in wires i1, i8 and i9 55 suitable means such as bolts s! and BI' which are also insulated from the plates. The casings in which these plates are located are made of a suitable insulating material. i

Each of the sections of plates have a plurality of vertically disposed slots cut in one edge thereof which will be denoted by reference characters E8 to |00 inclusive in which suitable windings are inserted. Located in the central ptrtion of the lay is another section of laminated iron plates which is denoted by reference character |05 and this section has a plurality of. slots 39 to I 08 cut in the face thereof for receiving similar coils. The construction of section |05 may be so that it can be divided into a plurality of sections with slots 89. to |98 therein or it may be made in one continuous section having these same slots placed therein in repeated form.

The section |05 is enclosed in a casing comprlsing members ISS and losa which section is held therein by any suitable means such as insulated bolts |01. Disposed on top of section iBS is a bed plate |98 which is made of a suitable insulating material and which has serrations in the upper surface thereof for accommodating the warp threads. The shuttle 4B travels over this plate.

The wiring which is adapted to be placed in the slots 89 to |02 inclusive in the laminated plate is essentially that of the windings of a threephase induction motor. The section of winding which is adapted to be placed in the laminated section 85 will be described and its connection with the subsequent section of winding 1S. Since the winding in the sections 1B, 11, 18 and 18 is identical a repeated description will not be made. The windings in the plates comprise phase A, phase B and phase C, each of said phases comprising a pair of coils and each oi' the coils havlng a plurality of turns therein such as shown in Figure 6. In this particular case each'coil has eight windings therein, however the windings may be varied to accommodate different designs.

'I'he wire 51 leads into coil li which coil consists of a number of turns such as are shown in Figure 6, and from this coil a wire leads therefrom which is connected to another coil H2. Both of these coils comprise phase C of this particular winding and it should be noted that the coils are adapted to be inserted in the slots in the laminated section oi plate 15 in a manner shown in Figure 5. From the coil ||2 a suitable wire H3 leads to the next succeeding coil lili in phase C of the section of winding 18 disposed in laminated plate structure 85.

The wire 88 which leads to coil H5 is similar in all respects to the coil H0 just described but being disposed in different slots and also being disposed in overlapping relation to the other coils. This coil has a wire H6 leading therefrom which is connected to another coil l i1 placed in overlapping relation to coil H5 and being likewise disposed in suitable slots in the plate. Coils H5 and H1 comprise phase B of the winding. From coil Il a wire H3 leads to the next succeeding coil I|5 of phase B in the section 16 of the winding.

The wire 25 leads into a coil |20 which is also placed in slots in the laminated plate structure 85 and has a wire 12| leading therefrom which is connected up in series to a coil |22, both of the coils |20 and |22 are placed in overlapping relation to each other and with respect to the other coils in the phase and comprise the phase A of the winding. From the other side of the coil `|22.' a wire |23 leads therefrom which is connected to the next succeeding coil |20 of phase A in the winding 16.

This method oi' winding is continued through section 16 and section 19, section 18 and section 11. 'I'he section 18 is divided up into a plurality of windings such as have been previously described in the section of winding 15. and the number of sections of windings in the section 19 being determined by the length of the lay and the design of the loom. Leading from coils H2, ||1 and |22 in the section 11 are suitable wires |28, |29 and |30 which are joined together and connected to a wire ISI:v said wire |3| being grounded as at |32. l

The showing of the windings in the drawings has been enlarged for the sake of clearness. It is to be understood that each coil would cross the laminated structure at very much closer intervals than those shown in order to prevent excessive speed of the shuttle.

Referring to Figure 2 it is seen that the shuttle I8 has suitable copper bands or rings |38 on each end thereof lichnc-orrespond to the rotor of an induction motor. Since the windings in sections 15, 16, 11, 'I8 and 19 correspond to the eld coil or stator ln the induction motor except that they are in a developed form instead of being disposed in a circle it is quite evident that by introducing current into the winding in sections 15 to 19 that a circulating current will be induced in the copper bands |3 which will set up a magnetic field in opposition to the stator iield and give the shuttle a resulting force'in a direction parallel to the stator windings and at right angles to the flux. Immediately before the shuttle has reached the box on the other side of the loom the current will bewreversed, by means of the reversing switch 2S which will not only cause a magnetic bralgeto be applied to stop the shuttle,`mne, reverse the direction of travel thereof. Disposed in shuttle boxes I5 and I5' are suitable impact members N0 and ISU' which are held in extended position by springs. lll and IM. These impact Amembers assist in checking the shuttle in the shuttlenboxpsg, "I'tl'cirawi'gs"nd"iciation there has been set forth a preferred embodiment of the invention, and although speciilc terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope ofthe invention being set forth in the appended claims.

I claim:

1. In a loom having an electro-dynamic apparatus for eii'ecting rectilinear movement of a filling carrier through a warp shed comprising a lay having a lling carrier box in each end thereof, a stator field disposed in the entire length of said lay and on each side of said boxes, each stator eld having a plurality of phase windings therein, a non-conductive base plate disposed upon said lay and over said windings, said plate having a plurality oi transversely disposed serrations in the top surface thereof for the accommodation of the warp threads, a lllng carrier having an electrically conductive body adapted to move back and forth between said boxes along the top of the lay, means for admitting alternating current to said windings to produce a flux of variable density in said windings which flux acts to induce current and create a positively moving magnetic field passing through said electrically conductive body to cause the shuttle to be impelled across the lay.

soY

2. In a loom having a shuttle with an induction element therein;`a lay having a shuttle box on each end thereof for confining the shuttle in its travel across the lay, apolyphase field winding in the`Y entire length of said lay and shuttle boxes, means for` creating a constantly moving eld in said eld winding which passes through -said induction element to impel the shuttle from one shuttle box-to the other, and means operable upon the absence of ashuttle in one o! the shuttle boxes upon the completion of a pick of the loom for eliminating said induced constantly moving magnetic iield. a non-conductive base plate disposed over said lay and over said windings for supporting the shuttle, said plate having a. plurality of grooves therein for receiving the warp thread as the shuttle travels across the lay.

PAUL B. WILSON.

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