US1786712A - Loom dobby - Google Patents

Description

Dec. 30, 1930. i A. A. GORDON 1,786,712?

LOOM DOBBY Filed Aug. 15, 1929 2 Sheets-Sheet 1 flaw rm? 44 EE/FT /2 60/200 0, 1930. A. A. GOJRDON 1,786,712

LOOM DOBBY File'd Aug. 13, 1929 2 Sheets-Sheet 2 Patented Dec. 30, 1930 umreo STATES.

PATENT oFFios ALBER'I A. GORDON, WORCESTER, MASSACHUSETTS, ASSIGNOR TO' CROMPTON '& KNOWLES 1300M" WORKS, F WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS i LOOM DOIBBY Applicationyfiled August 13, 1929'. Serial No. 385,502.

This invention relates to a dobby by which the movements of harness EtCliS or other devices in a loom mlay be determined. It 15 customary in suchdobbies to provide a pattern chain built up of substantial and material elements, suchas chain rolls or pegged crossbarsi 7 It is the object of my inventlon to provlde a dobby in which the indications mayjconveniently be derived from a" perforated strip of paper; which may be easily and cheaply produced of any desired length and which may be stored in a roll of small d mensions,

A further object of, the invention is to pro- 'vide novel elements cooperating with the perforated strip, bywhich the indications are transmitted to the lifter levers wlthout causing'the weight ofthefingers at any time to be sustained by the perforated strip. 2%

ments andcombinations of parts which will behereinafter described and more partlcularly pointed out in the appended clamis.

A preferred form of the inventionis shown in the drawings in which 7 Fig. 1 is a side elevation of a dobby embody'ing my improvement-s;

Fig. 2 isa sectional plan view, taken along the line 2-2 in Fig. l;

Fig.3 is a sectional side elevation, taken along the line 3+3 in Flg. V Fig. 4 is a detail side elevatlon to be described;

Fig. 5 is a side elevation of apart of the perforate sheet and its suppo ting Cylinder,

tion; e

Fig. 6 is'an enlarged side elevatlon of certain parts shown in Figs, and c Figs. 7,8 and 9 are dlagrammat cvlews, showing the cooperation of certain parts under different conditions. I 7

Referring particularly to Elgs. 1 and 2, I have shown a dobby comprising a frame supporting the usual rock shaft 21 on whlch is inounted a lever22. connected by llnks 23 to upper and lower knife bars 24 and 25. The shaft 21 is regularly oscillated by actuatlng mechanism, not shownf I 4,. Upper and lower dobbyfingers 26 and 27 with the indicating members shown in sec- My invention further relates to arrange-- are pivoted at the opposite ends of levers 28, which in turn are pivoted to the usual harness jacks 29 or to other elements to be actuated thereby. Lifter levers 30 and 31 (Fig. 3) are mounted in the lower part of the dobby frame 20, the levers 3O controllingthe upper fingers 26 through lifter rods 32 and the levers 31 directly engaging the lower fingers 27.

.The levers 30 and 31 are provided with segmental slots (Fig. 8) for a purpose to be described,"but otherwise the. parts thus far described are of the common commercial con- Y struction.

A pattern cylinder 40 is mounted to rotate 7 An additional set of holes .47 near each edge of thesheet S may be caused to cooperate with pegs 48 in the cylinder 40 to preserve'thecorre'ct alignment of the perforations with the holes 46 in the cylinder..

Indicatingmembers 50 are pivoted at one. end ona cross rod 51, mounted in vertically slidable supporting members 52. At their lower ends, the members 52 are guided by studs 54 (Fig. 3) projecting into slots 55 in said members and at their upperlends the 1 members 52:are provided with slots 56embracing a cross shaft 57 on which two pairs of actuating cams 58 and 59 are mounted.

Thecams 58 are effectiveto intermittently raise and lower the members 52wl1ich sup 7 port the cross rod 51, on. which the indicating members 50 are pivoted- The cams 59 act through links 60 to rock a pair of levers .62, pivoted at 63 and supporting a segmental knife bar. 64 at their lower ends. i

The indicating members 50 are provided with depending studs 65 (Fig.3) adapted to register with theholes 46 of the cylinder 40 when the cylinder is at rest in its successive operative positions. The free ends of the indicating members 50 are beveled as indicated at 66 (Fig. 7) and extend adjacent the path of movement of the knife bar 64.

The knife bar 64 is not rigidly attached to the lower ends of the levers 62 but is pivoted thereon at 68 and is provided with lugs 69 engaging abutments 70 on the levers 62.

Springs 71 (Fig. 3) hold the knife bar 64 yieldingly in the position shown in Fig. 7 but permit a slight clockwise yielding movement of the knife bar under certain conditions to be'described.

A fixed cross rod or support 73 (Fig. 3) extends under the beveled ends of the indicating members 50 and provides a pivotal support for rocking movement thereof under certain conditions.

Having described the details of construction of my improved dobby, the method of operation thereof is as follows:

The cams 58 act to raise the supporting members 52 and cross rod 51 to the position shown in Fig. 8 just prior to an angular advance movement of the cylinder 40. I11 this position the studs 65 on the membersbO clear the perforated sheet S. The cylinder 40 then given a quarter revolution, bringing the next successive series of perforations in alignment with the studs The cams 58 then permit the supporting members 52 and cross rod 51 to move downward to the position shown in Fig. 7, so that the studs 65 may enter the perforations or be supported on unperforated portions of the paper.

Ifthe studs enter perforations 45 and the holes 46 underlying the same, the indicating members 50 take the position indicated in Fig. 7, in which the beveled ends 66 of the members 50 are out of the path of movement of the segmental knife 64. If, however, the studs engage unperforated portions of the sheet S, the indicating members 50 will be rocked about the studs 65 as pivots to the position shown in Fig. 9, with the beveled portions 66 projected into the path of the segmental knife 64. The cams 59 then cause the knife 64 to be advanced, engaging the members 50 which are in the position indicated in Fig. 9 and causing the corresponding lifter levers to be raised, thereby positioning the associated dobby fingers for engagement by the actuating knife bars 24 and 25. herever a perforation 45 occurs in the record sheet S, however, the corresponding indicating members 50 assumethe inoperative position indicated in Fig. 7 and the corresponding indicator levers remain at rest in normal position.

If for any reason the lifter levers 30 or ,31 are not'free to move when the segmental knife 64 is swung upward, the knife will yield slightly, as indicated in Fig. 6, upon engagement with the ends 66 of the members 50, and breakage of parts will thus be prevented.

I aving thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is 1. In a dobby, a pattern cylinder having holes therein, means to intermittently advance said cylinder, a record sheet mounted on said cylinder and having transverse rows of perforations therein adapted to register with said holes, a plurality of dobby fingers, lifter mechanism therefor, a plurality of indicating members, asupport on which said 'iembers are pivoted, and means to give saidv support intermittent regular movements, the resultant movement of said members being modified by the presence or absence of perforations in said record sheet.

In a dobby, a pattern cylinder havingholes therein, means to intermittently advance said cylinder, a record sheet mounted on said cylinder and having rows of perforations therein adapted to register with said holes, a/plurality of (lobby fingers, lifter levers therefor, an actuating member normally freely movable relative to said lifter levers. and an indicating member for each lifter lever,'each indicating member having an intermediate portion cooperating with the record sheet and one end of each member being positioned in the path of said 'actuatin member by engagement of said intermediate portion with an unperforated part of said record sheet, and thereby rendering said actuating member effective to raise the lifter lever associated with said indicating memher, and the opposite end of each indicating member being movable intermittently and regularly to cause saidintermediate portions to engage the record sheet or a perforation therein.

3. In a dobby, a pattern cylinder having holes therein, means to intermittently advance said cylinder, a record sheet mounted on said cylinder and having rows of perforations therein adapted to register with said holes, a plurality of dobby fingers, lifter levers therefor, an actuating member normally freely movable relative to said lifter levers, and an indicating member for each lifter lever, each indicating member having an intermediate portion cooperating with the record sheet and one end of each member being positioned in the path of said actuating member by engagement of said intermediate por tion with an unperforated part of said record sheet, and thereby rendering said actuating member effective to raise the lifter lever associated with said indicating member, and the opposite end of eachindicating member being movable intermittently and regularly to cause said intermediate portions to engage the record sheet or a perforation therein, said indicating member being inoperative when a perforation in said record sheet is presented thereunder.

4. In a dobby, a pattern cylinder having holes therein, means to intermittently advance said cylinder, a record sheet mounted on said cylinder and having rows of perforations therein adapted to register with said holes, a plurality of dobby fingers, lifter levers therefor, an actuating member normally freely movable relative to said lifter levers, and an indicating member for each lifter lever, each indicating member having a portion cooperating with the record sheet and another portion of each member being'positioned in the path of said actuating member by engagement of said first portion with an unperforated part of said recordsheet and thereby rendering said actuating member effective to raise the lifter lever associated with said indicating member, said actuating member being adapted to yield relative to said indicating member if movement of said member is prevented.

5. In a dobby, a pattern cylinder having holes therein, means to intermittently advance said cylinder, a record sheet mounted on said cylinder and having rows of perforations therein adapted to re ister with said fingers, lifter le- 7 holes, a plurality of dobby vers therefor, an actuating member normally freely movable relative to said lifter levers, a movable support to Which one end of said indicating member is pivoted, a fixed support on which the other end of said member rests, and means to raise and lower said movable support;

6. In a dobby, a pattern cylinder having holes therein, means to intermittently ad- Vance said cylinder, a record sheet mounted on said cylinder and having rows of perforations therein adapted to register with said holes, a plurality of dobby fingers, lifter le vers therefor, an actuatingmember normally freely movable relative to said lifter levers, a movable support to-whichone end of said indicating member is pivoted, a fixed support on which the other end ofsaid member rests, and means to raise and lower said movable support in timed relation to the movement I of said actuating member. s

7. In a dobby, a pattern cylinder having holes therein, means to intermittently advance said cylinder, a record sheet mounted on saidcylinder andhaving rows of perforations therein adapted to registergwith said holes, a plurality of dobby fingers, lifter levers therefor, an actuating member normally freely movable relative to said lifter levers,

a movable support "to which one end of said indicating member is pivoted, a fixed support on which the other end of said member rests, and a cam operable to raise and lower said movable support in timed relation to the movement of said actuating member.

In testimony whereof I have hereunto affiXed my signature.

ALBERT A. GORDON.

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