US2020429A - Selective controlling device for electrically operated brocade looms - Google Patents

Description

Nbv. 12, 1935. K. NAKANISHI 2,020,429

SELECTIVE CONTROLLING DEVICE FOR ELECTRICALLY OPERATED BROCAQBTLOOMS Filed Feb.- 6, 1.934

IINVEIYTORI K- i /(2)113 1 A TTORNEYS.

4 Sheets-Sheet l Nov. 12,1935. NAKEANISHI 2,020,429

SELECTIVE CONTROLLING DEVICE FOR ELECTRICALLY OPERATED BROCADE LOOMS Filed Feb. 6, 1934' 4 Sheets-Sheet 2 INVEN TOR.

ha Hams/ I A TTORNEYS.-

NOV. 12, 1935. K AN sm 2,020,429 SELECTIVE CONTROLLING DEVICE FOR ELECTRICALLY OPERATED BROGADE LOOMS Filed Feb. 6, 1934 4 Sheets-Sheet 3 IN V E 'N TORI A TTORNEYS.

Nov. 12, 1935. K; NAKANISHI 2,020,429

SELECTIVE CONTROLLING DEVICE FOR ELECTRICAELY OPERATED BROCADE LOOMS Filed Feb. 6, 1954 4 sheets-S5 1, -4

INVENTOI A TTORNEY:

Patented Nov. 12, 1935 SELECTIVE CONTROLLING DEVICE FOR ELECTRICALLY OPERATED BROCADE Kinsaku Nakanishi, Hakata, Fukuoka, Japan I I Application February 6, 1934, Serial No. 710,002

4 Claims.

This invention relates to improvements in selective controlling devices for electrically oper-'- ated brocade looms, card cutting machines and other similar purposes, and its principal object is to provide a selective mechanism for operating brocade looms and card cutting machines and the like whereby the successive selective operations may be completed during the actuation of the operating elements of the machinery so that the successive weaving or punching operations may be effected immediately without wasting idle timeuntil the operating elements have completed their operations and have been moved to the newly selected positions, thereby considerably increasing the operating efllciency.

-For a better understanding of my invention reference may be had to the accompanying drawin'gs in which Fig. l is a perspective view illus trating an arrangement for selectively operating the hooks of a brocade loom photo electrically; Fig. 2 is an enlarged detail view of a selective controlling member for the hooks of the device shown in Fig. 1; Figs. 3 and 4 are side eleva-' tions of its modifications respectively; and Figs.

' 5 to 8 are side elevations of modified arrangements of a portion of the device shown in Fig. 4

Referring now to Fig. 1 of the accompanying drawings, I represents-a sliding board bearing an original picture .of a design; 2 is a light source;

'30 3 is a lens; 4 is a prism; 5 isv a photo-electric 7 all of the latches 25 and 25'. may be restored to cell; 6 is a shutter and .l is its driving motor. These elements are so arranged as to'project the light from the sourcep2 onto the picture on the sliding board I as alight spot'and to pro- Ject its reflected light into the photo-electric cell asshown in the drawings. An amplifier 8 is connected in the output circuit of the photo v electric cell and, its output current is led to the operating coil ofa relay 9 to close its contact ID or II in response to the shading of different .elements of the original picture. i2 designates a change-over switch which is suitably changed as the picture is positive or negative. The switch is manually set at the start of weaving operation and kept at the position throughout the operation. I3 represents a suitable source-such, for instance, as abattery which is provided for energizing the bus-bar l5 through a series adjust-' able resistor I4,.the contact of relay 9 and switch I2, and thence the actuating coil of a selecting .electro'magnet of rotary type. The present selecting electromagnet is supported on a shifting bracket ll mounted on a feed ing screw shaft l6 and comprises aplurality of electromagnets such as for instance, four elecing in the weft.

- In Japan February 13, 1933 series or in parallel through the brushes 2| secured to the supporting frame i1 and the lead 5 wires 22. A roller 24 is attached to one end of its armature and when the armature 23 is attracted the roller 24 pushesone which comes -in opposite position thereto out-of a. number of latches 25 and 25' to be selected which correspond in number to those of the picture elements and are arranged at opposite sides of the'selecting electromagnet'alternately 'as will clearly be seen in Fig. 2, to displace the latch to the position shown by dotted lines. 28 is a biasing 15 spring of the armature 23 and 29 is a biasing spring for the latch 25 to be selected.

One end of the selecting lever 21 supported at the pivot 26 is engaged with the latch 25 to be selected and is moved to the position shown by 20 the dotted'lines by means of a bias spring 30 when released. A selecting lever 21 .is pressed on one side by the selecting rod 32 by means of a spring 3| and also it is adapted to be operated by a restoring rod when projected.- The re- 25 storing rod 60 is normally biased to an inoperative position as shown in the drawings by means of the spring BI and a cam 64 mounted on a side shaft 63 is associated with the other end of the restoring rod directly or through a lever 62. Thus 30 a position ready to' be selected, as-shown by the full lines, periodically as soon as the knife edge 34 is lifted to make it possible to start the next scanning operation and complete 7 its selective 35 control without delay'while the knife edge 34 is" being lifted and the brocade is being woven. 35 is a string suspended from the lower end of the hook 33; 36 is a harness head connected to the string; 31 is a hemp thread; 38 is a har- 40 ness provided with a thread opening 40 for passing through a warp'thread 39 and 4| designates a dead weight. 42 is a winding drum; is a shuttle carrying a weft and 43 is a reed for heat- 45 The driving means for synchronizing the movements of selecting 'electromagnets and sliding board I will be explainedin the following:- In the example shown in Fig. 1, an operating shaft is driven by .a motor 44 through-bevel 5C gears 45 and 46 and the motion is transmitted to .the screw shaft l6 through either one of the 1 upper and lower bevel gears and 49 mounted transverse direction at each stroke of its longitudinal direction.

with the above mentioned device I will explain the manner by which a brocade corresponding .to the original picture is woven by putting the picture of a certain design on the sliding board I and illuminating the light source 2. Then the motor 44 is started and they screw shaft I5, the side shaft I8 and the cam 55 are driven through the gear train as above mentioned and the supporting bracket I! of the electromagnet and the sliding board I are shifted in synchronism. Thus the selecting electromagnet 25 is simultaneously rotated by the sideshaft I5.

Then, one latch 25 to be selected which corresponds to the scanned picture element of the original picture on the sliding board I, is always brought to face one of the rotary electromagnets and is controlled by the roller 25 on its armature 23. If a bright spot of the original picture is being scanned and the contact II of the relay 9 is closed with the photo-electric current the bus-bar l will be energized from the source I 5' through the resistance I5, the relay contact II and the switch I2 when the bright element is scanned and thus energizes the electromagnet 25 through the brush 2 I. Accordingly, the armature 23 will be attracted as shown by the dotted lines of Fig. 2 to rotate the latch 25 to be selected counter-clockwise around its pivot, thereby releasing the selecting element 21 and displacing the same to the dotted line position by means of a spring 55. Thus, the selecting rod 52 is pushed to the right and the hook 55 will assume the dotted line position ready to engage with the knife edge 55. As for the latch 25 to be selected which corresponds-to the dark element of the original picture, v,since the relay 5 closes its contact l5 and opens the contacts II for such a dark current said latch will remain to the full line position and its hook 55 will assume the full line position disengaged from the knife edge 55. Thus, at the end of one stroke of the sliding board I, allof the latches 25 to be selected arearranged so that one line corresponding to one scanning line of the original picture may be drawn by a weft. Accordingly, if the knife edge 55 is lifted to pull up the warps 55 belonging to the hooks "engaging with the knife edge and a weft is threaded therethrough'by means of a shuttle 55 after one stroke of the sliding board I or one line scanning is completed, a textile bearing a design corresponding to the original picture will be produced.

stated so that the waste of time which occurs in machines heretofore used in which the selecting operation is started after the knife edge 54 has been lowered, is avoided and high-speed operation is made possible, thereby considerably increasing the emciency.

Further, since a small number of electromagnets is rotatably combined and these magnets are shifted in synchronism with the scanning operation of the original picture, it has characteristics 10 that the spacing between the latches 25 equal to the number of the picture elements included in one scanning line of the original picture, is reduced, thereby affording a compact structure as a whole. If the latches 25 and 25' to be selected 5 are arranged alternately in tworows as specially shown in Fig. 2, its volume will be considerably reduced.

In Fig. 3, a synchronous electromagnetic device adapted to move in synchronism with the scanning operation of the original picture is associated with the latches to be selected which are similar to those shown in Figs. 1 and 2. Since the same reference characters are used to designate similar parts in these figures, its operation will easily be understood from the explanation of Figs. 1 and 2.

Fig. 4 illustrates an embodiment of this invention as applied to an arrangement in which instead of the selecting electromagnet of a synchronous rotary shifting type, as shown in Figs.

1 and 2, a number of fixed electromagnets 25 corresponding with each picture element of the original picture are arranged and the energization is selectively controlled through a distributor comprising the same number of contacts and a co-operative brush having a synchronous relation with the scanning operation of the original picture. The selecting element 21 is engaged with the latch 25 to be selected, which is attached to the fixed electromagnet 25. Figs. 5 to 8 desig-- nate its modifications and the arrangements are similar to that shown in Fig. 2. Accordingly, their detailed explanations are omitted by only designating the similar parts with the same ref- 5 erence characters as in Fig. 2.

In any of the above arrangements, the selecting elements 21 are returned to the full line positions ready for the selective operation by means of the restoring rod 55 as soon as the lifting movement is started irrespective of the lifting operation of the hooks 52 and the successive selection is immediately started so that the latches may assume the next selected positions by the time the hooks 53 are lowered. Thus, this invention has advan- 55 tages that the weaving operation may be completed quickly and accurately without wasting double timetas occurs in heretofore used loomss in which the weaving operation should be effected after the weft has been threaded and the next 50 selective control has been completed.

The arrangement ofthe optical system 2, I, 5 and 5 may be selected suitably and is not necessarily limited to that shown in the drawings. It is enough if the concentrated light may be projected on the original picture. While the refiected light ray is shown to be projected into the photo-electric cell 5 the light my which'has -passedthruthepicturemay,ofcourse,beused.

If a sumcient current can be derived from the 7 photo-electric cell 5 and in other similar cases, the amplifier 5 and/or the relay 5 may be dispensed with. -The original picture may be divided into several sections and a photo-electric cell and an electromagnet are associated with 2,020,429 each section respectively to scan the sections simultaneously, thereby increasing its operating efilciency considerably.

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

1. A selective controlling device for electrically operated brocade looms, comprising means for generating a. photo-electric current corresponding to an original picture of a certain design, electromagnets energized with said photo-electric current, latches controlled by said electromagnets, selecting elements normally caught by said latches respectively, said elements being put in contact with selecting rods for moving hooks to positions ready to be engaged by a lifting knife edge, and restoring rods associated with said selecting elements periodically with a predetermined relation to the scanning operation of the original picture.

2. A selective controlling device used for electrically operated brocade looms, comprising means for generating a photo-electric current corresponding to a original picture of a suitable design, a plurality of electromagnets mounted rotatably on a shifting .bracket moving in synchronism with the scanning operation of the original picture and adapted to be energized with said photo-electric current, latches arranged along the path of said electromagnets to be operated thereby in number corresponding to the number of the picture elements scanned on the original picture, selecting elements normally caught by said latches and adapted to push selecting rods for moving harness hooks to positions ready to be engaged by a lifting knife edge, and restoring rods associated with said selecting elements for pushing said selecting elements back to the normal positions as soon as said hooks are lifted by said lifting knife edge.

3. A selective controlling device used for electric brocade looms, comprising means for generating a'photo-electric current'which varies responsively to the shading of the scanned elements of an original design picture, an electromagnetadapted to be shifted in synchronism with the scanning operation of the original picture, latches arranged alternately in two rows and in number corresponding to the number of elements scanned 5 on said original picture so as to be operated by said electromagnet shifting along the central passage between the two rows of latches, selecting elements normally caught by said latches,- selecting rods pressed against said selecting elements respectively for moving hooks to the position ready to be engaged by a lifting knife edge, and restoring rods associated with said selecting elements to be projected periodically so as to restore said selecting elements to their normal positions as soon as said lifting knife edge is lifted.

4. A selective controlling device used for electric brocade looms, comprising means for generating a photo-electric current which varies responsively to the shading of the scanned elements of an original design picture a number of fixed electromagnets corresponding in number to the picture elements scanned on the original picture, a distributor comprising contacts equal in number to said magnets and a co-operating movr le brush adapted to be worked in synchronous relation to the scanning operation of the original picture so as to energize one of said electromagnets corresponding to the picture element scanned with said photo-electric current therethrough, selecting elements normally held by latches to be operated by said electromagnets, selecting rods pressed against said selecting elements for selectively operating harness hooks to positions ready to be engaged with a lifting knife edge, and a restoring rod associated with said selecting, elements so that the latter may be pushed back to their normal positions at a period bearing a predetermined relation with the scanning operation 01' said original picture and the 4o movement of said lifting knife edge.

KINSAKU NAKANISHI.

Images