US1740502A - Spool for looms and other textile machines - Google Patents

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Dec. 24, 1929. P. FRH ET AL sPooL vFon Looms AND oTHER mmm: nAxuNEs Filed Oct. 3 1927 fg. s.

.fllllllll Patented Dec. 24, 1929 UNITED STATES PATENT OFFICE PETER FRH AND KARL BRAUN, F GAUTING, NEAR MUNICH, GERMANY; SAID' BRAUN ASSIGNQR T0 SAID FRH SPOOL FOR LOOMS AND OTHER TEXTILE MACHINES Application filed October 3, 1927, Serial No.

We have led applications in Germany, January 5, 1926. F. 60,648, VH, 86g, and August 17, 1926, F. 61,934.

Spools of light metal.` for looms and other textile machines, have in some cases'been provided with annular or helical, inwardly directed ribs,'mad'e by indentation, for engaging the spindles on which the spools are placed. rlhese ribs are somewhat expensive to produce, and lack resilience, so that the spools are liable to bind on the spindles and can only be withdrawn with diiliculty. Moreover, it is ditcult so to produce them that uniform engagement with the spindle is obtained.

According to this invention these defects are overcome by making the ribs extend lengthwise of the spool. lThey are then resilient, and in producing the spool by a drawing process the ribs can readily be made to conform to the taper of the spool, so that uniform Contact with the spindle, throughout their length, is obtained. The lattenings Y due to the indentations give the yarn a better hold than it has on a spool which is circular throughout, and the usual grooves provided to prevent the slipping oi of the yarn may be dispensed with, or provided only at the edges of the depressions made by the indentations forming the ribs. The latter may have slots, to increase their resilience, and tongues of metal may be bent inwards at their upper ends, to orm abutments for the tip or the spindle.

Three embodiments of the invention are shown in the accompanying drawing, in Figs. 1 and 2, Figs. 3 and 4 and Figs. 5 and 6 respectively; Figs. 1, 3 and 5 are vertical sections, and Figs. 2, 4 and 6 are cross-sections on the lines I-L II-II and III-lll respectively.

Referring rst to Figs. 1 and 2, a is the slightly tapered shank of the spool and b the foot thereof, these two parts being integral with cach other, and being produced by drawing a tubular blank of light metal, At the junction of the foot and shank there is a shoulder c. The shank has three inwardly directed, uniformly spaced vertlcal rms d made by indenting, these ribs coming into 50 contact with the spindle, and exerting resili- 223,614,21116. in Germany January 5, 1926.

ent pressure, which enables the spool to be drawn oft' the spindle easily when required.`

`The shank may have external transverse grooves or shoulders :n at the edges ot the grooves formed by the indentations made for producing the ribs d. y

In the embodiment shown in Figs. 3 and 4 the shank a1 has inwardly directed longitudinal ribs d1, made by indentation, and at the upper end and the lower end of cach rib a transverse slot c' is made in the inwardly pressed portion of the metal, to increase the resilience of the ribs. At the upper ends of the ribs (Z1 short tongues of metal are bent r inwards from 'the parts where the slots are made, and these form abutments limiting the extent to which the spool can slipv down the spindle. At their lower ends the ribs d1 have enlargements j, which reduce the gaps between the ribs at this part, so that when the spool is slipped on to a spindle the tip of the spindle cannot enter the gap between two ribs and become jammed.

In the modification shown in Figs. 5 and 6 the shank a2 has` longitudinal, inwardly directed ribs cl2, each of which has a slot l extending lengthwise thereof, at its crest, the eiect orn these slots being to increase the resilience of the ribs. Where the ribs d2 terminate at the bottom a short, thin tube Z is nserted into the spool, to guide the spool when it is slipped on to the spindle and prevent the tip of the spindle from becoming jammed between two ribs.

The ribs may be discontinuous, that is to 85 say a series of short ribs d3, with gaps y be' tween them, may be substituted for a single rib, and these shorter ribs may be placed out of direct alinement with each other.

What we claim as our invention and de- 90 sire to secure by Letters Patent of the United States is 1. A bobbin of light metal, for textile machnery, having a foot and a tubular shank, said shank having longitudinal, inwardly directed indentations forming ribs extending interiorly of the shank beyond its inner periphery, said ribs having slots extending lengthwise thereof.

2. A bobbin of light metal, for textile lna- 10 ehinery, having a foot and a. tubular shank,

said shank having longitudinal, inwardly directed ribs formed by indentations, and said shank having also inwardly bent tongues of lmetal, oneiat the upper end of each rib.

3. A bobbin of light metal, for textile machinery, having a foot and a tubular shank, said shank having longitudinal, inwardly directed ribs formed by indentations, each of said ribs having lateral enlargements at its lower end.,

4. A bobbin of light metal for textile machinery, comprising a foot and a tubular shank, said shank having integral therewith longitudinally extending inwardly directed imperfo'rated reenforcing ribs of substantial length, adapted to yield under pressure.

In testimony whereof we hereunto aflix our signatures.

PETER FRUH. KARL BRAUN.

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