US2610654A

US2610654A - Spindle bumper

Info

Publication number: US2610654A
Application number: US185886A
Authority: US
Inventors: David A Ahlstrand
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-09-20
Filing date: 1950-09-20
Publication date: 1952-09-16
Anticipated expiration: 1969-09-16

Description

Sept. 16, 1952 D. A. AHLSTRAND 2,610654 SPINDLE BUMPER Filed Sept. 20, 1950 myc/a5.

Patented Sept. 1 6, 1952 i UNITED STATE Y SPINDLE BUMPER David A. Ahlstrand, Atlanta, Ga. v

Application September 20, 1950, Serial No. 185,886

for one purpose to providev a spindle bumper of increased life and efciency.

Another purpose is to provide a spindle bumper in which breaking under wear is reduced to a minimum.

Another purpose is to provide a spindle bumper in which relatively small pieces of inexpensive material may be employed.

, Another purpose is to provide a spindle bumper in which, upon breakage or wear, only part of the spindle bumper structure need be replaced. f

Another purpose is tok provide a spindle bumper, the cost of which is substantially reduced in relation .to the spindle bumpers in current use.r

Another purpose is rto provide a spindle bumper which may be formed of a wide variety of material, includingplastics, textiles, rubber and rubber substitutes, in avariety of combinations.

Other purposes will appear from time to time in the course of the specification and claims.

I illustrate, my invention more or less diagrammatically in the accompanyingdrawings wherein:

Figure F1 is a side elevation of one embodiment of my invention;

Figure 2 is a yside elevation of bodiment of n my invention;

` Figure 3 is aside elevation of a third embodiment of my invention; and.

Figure iis a side elevation of a Vfourth embodiment of my invention.

`Likeparts are indicated by like symbols throughout the specification and drawings.

Since Indo not claim any novelty in the mechanism on which the spindle bumper is used, I illustrate herein only the spindle bumper structure itself.

Referring to the drawings, I indicates an app1icator.` Ihe applicator has for its purpose tov apply the bumper structure to the spindle itself. The applicator may be made of any suitable material, preferably vof'a cheap material, so that, `if desired, the applicator may be thrown away after use. `It enables the bumper structure to be veasily applied to the spindle. The spindle is not herein shown, but the applicator another emcan be taken as typical of a rod or spindle struc- 11 claims. (o1. 139-166) the machine shaft or spindle, and the straps are pushed Aoff of the applicator shaft and ontothe machine shaft.v -On the spindle, the bumper parts are positioned as shown on the applicator in the drawingsherein.

It will be understood that the bumper, when used in textile Weaving, absorbs the shock which, in machines now available, is absorbed by a unitary strap formed in a plurality of bends. In the use cf the forms of my invention, in Figures 1 and 2, no piece of material is subjected to more than one bend. Taking, for example, the form of Figure 1, I provide a plurality of relativelyshort straps 3, each Aof which isbent to form a U, having, in its opposite arms, apertures 3a and 3b. y'Ihese apertures are of sufiieient size to permit the U-shaped bent strap 3 to be applied readily to the applicatorr I, being passed over its tapered end Ia. vI find it advantageous, in the members 3, to employ pieces or straps which, if desired, may be arranged in multiple plies. I illustrate, in Figure 1, the separate plies formed by adding an additional ply 3c to thesingle ply or member `3but, if desired, more than two plies may be employed, depending upon the material used. `The plies may be connected by cementing, by'sewing, or by any other suitableikmeans. I may' employ multiple plies of any suitableplastic, including, but not limited to nylon. I may employ rubber, or any suitable rubber substitute. Under some circumstances, `it may be advantageous to employ leather, either alone or in-connection with a ply or plies of rubber or some other substance.

In the present application I emphasize, primarily, the form rather than the substance of the various pieces employed.

. In the form of Figure 1, I illustrate, for eX- ample, five U-bent short piecesl or straps arranged in interpenetrating relationship, with the arms ofthe Us at oneside of the applicator I entering .the folds of the Us atthe opposite side ci? the applicator. Where five of the Us` are employed, as in Figure 1, I maintain the individual straps or parts properly positioned by -usingany suitable intermediate blocks or bits 4 within the folds of the end members ofthe series of Us. Each such block 4 maybe made rectangular, or of any othersuitable form, and may be aperturedfas at 4a, to be readily'applied to the applicator. The parts are so dimensioned, when rectangularly formed, that the blocks 4 may be held against rotation by theadjacent bends of the U. I may also employ any suitable end blocks orz'washersji, 5 with the apertures 5a.

The form of Figure 1 merely illustrates one satisfactory arrangement. In Figure 2, the individual U-shaped strap elements 6 are shown with their arms arranged in abutting relationship. An additional ply 6a may be added to the single ply or member 6. I may iind it advantageous to provide one or more intermediate or inner blocks or Washers 'I within the bend of each U. I also illustrate the terminal blocks or washers `8, as in the case of the form of Figurel.

In the form of Figure 3, for the U-shaped members or short straps, I provide loops III each having overlapping ends Ina. and Ib. I diagrammatically indicate, at Inc, any suitableadditional ply or plies which may be employed. II

indicate inner blocks or spacers, andy I2 indicate' end members or spacers. Any suitablernumber of spacers may be used.

In the form of Figure 4, I illustrate straps bent', in eiect, to form reverse Us. Each such strap I4 is formed with loops: I4b andrrllc. Nadia'- grammatically` indicates any Vsuitable additional ply or'plies. Each such memberis. aperturedat three points, asat Md, I4e and I l'toc'permit the passage of the applicator I. The straps are: then positioned in intertting arrangement,- as: vshown in Figurev 4,lwith thefree end of. eachstrap entering the bend of an adjacent strap. At theend bends, spacers I5 maybev used.y I6 indicateV the end spacers.

All forms of my 'device` have, in common,` the useY of a plurality of relatively short: pieces or strap members; In'the' forms oifFigures-.land 2, each strap' has a single bend. In thetormsof Figures 3 and 4, eachstrap has two bends;v In order to reduce'the-.bendingstressea and;to'pre vent over-bending; Iv mayI employ any suitable spacers, such as arefsh'own att-'in Figure-.1, at' I in Figure 2, at I I in Figure 3,.an`d atv I.5- in Figure 4. The number and spacings may be` widely varied to suit" particularV needs.`

Itv will be realizedl that, whereas, I have described and illustratedV one pra'cti'cal and operative device, nevertheless many changes may be made in the size, shape,.number. and disposition of parts without departing from *theV spirit'v of my invention. I. therefore wish'- mydescripti'on and drawings tobe taken asin a broad sensefillustrative or asi diagrammatic. rather than. as limiting me to my precise-showing:

I'he use andoperation oi'my inventionA are-as follows:

In current Weaving equipment itis' customary to use spindle bumpers formedof a single p ie'ce. These pieces are hard to apply tuv thefspindles,

and break easily at the radius off the individual bends.

In the use of my invention- Ifpr'ovide afsstructure which eiiiciently absorbsthe' shocks jwliich the spindle bumper has to absorb; Mydeslgn maintains the radius of each piece an'dprevents a break in the radius. The radius' is maintained by the interpositiorr of the free ends'of` adjacent pieces, and, where necessary,v bythe insertion of spacersv such as arefshownin the variouslgures; This' maintenance ofi radiust assurescontinuatiorr ofthe compression effect. cfithe beni*I pieces. 'Ihe use of shortpieces inzplaceof. the. former onepiece` elementslmplifies the replacement of worn or broken pieces. The form of Figure l has the advantage of reducing to aminimunr the spacers, whichr are usedin greater numbers in'theform of Figures 2 and 3. In other wordstheinterpene trating ends of the. Usin the. form of Figures. l.

and 4A themselvesconstitute spacers andreduce the necessityfor using intermediate spacers.

It will be realized that I may employ multi-ply elements or pieces. In use, the bumper structure, as a whole, is supplied to the user on an applicator in which the individual parts are positioned as they will be positioned on the spindle. The applicator is aligned with the spindle, and the parts are easily slid from the applicator upon the spindle. By using a relatively large number of small parts I find it simple and easy to move the parts from the applicator to the spindle, and to position themv properlyon the spindle'. A minimum of force has to be applied, force entirely insufficient to damage the bumper elements.

l I claim:

1. In a spindle bumper structure, a multipiece bumper including a plurality of bent straps arranged iii-'abutting relationship. each such strap having a pair of free ends and an intermediate curvilinear portion, the free ends ot all the straps being apertured and being thereby adapted to-beapplied to aspindle.; and s *tree end of each: strap being disposed adjacentfthe curvilinear portion ofxan'adjacent strap.

2. The structure of claim 1 characterized. in

that the bent straps arezformed oI-multipleplies.

3. The structure of claim 1 characterized in that the straps are bent into U-shape with. the arms of adjacent straps abutting.

4. In a spindle bumpervstructur'e,v a` multipiece bumper'including a: plurality of bent-straps arranged in abutting relationship. each such' strap having overlapping free ends, the. free ends of all the; straps, andv an intermediateY portion. ot each strap, being apertured in alignment andbeing, thereby adapted to be applied.v to a. shaft, eachstrap having aninner freelend and an outer free, end, the outer free; end' ot' each strap abutting an intermediate portion of an adjacent strap.

5; In a spindle bumper structure, a multi-piece bumper including a' plurality of bent straps arranged in abutting relationship, each such strap having. apair offree ends and two intermediate. oppositely facing, U-shaped bends, each strap being apertured at' three. points and being applicable. to a spindle.

6. Asa replacement' unit for spindle bumper structures, an applicator adapted for alignment with a bumper spindle and a multi-piece Vbumper arranged on the applicator; withthe individual pieces of the multi-piece bumper in the relationship they will havewhen applied tov the-spindle.

7. As a replacement unit for spindle bumper structures, an applicatorl adapted for alignment with a bumper spindle and a multi-piece bumper arranged. on the applicator, with the pieces'in the relationship they will have when applied to the spindle.'- said-multi-plecebumper including a plurality offbent straps 'having portions arranged in abutting relationship, each such strap being bent into U-shape and having free ends apertured for application to the spindle.

8. The structure of claim 7 characterized in that theA free ends of adjacent U-shaped straps interpenetrate.

9. Thestructure of claim 'T'cliaracterized` by and includingspacers lon said applicator positioned within the U-shaped bends of said straps.

10; As a replacement unitfor spindle bumper structures, an applicator adapted. for alignment with a bumper spindle and havingan end portion adapted. to receive the end of the. spindle, and a multi-piece. bumper arranged. onthev applicator,

with the individual pieces of the multi-pieceV bumperin rthe relationship they will. havewhen applied to the spindle.

11. As a replacement unit for spindle bumper structures. an applicator adapted for alignment with a bumper spindle and having an end portion adapted to receive the end of the spindle, and a multi-piece bumper slidably arranged on the applicator, with the individual pieces of the multipiece bumper in the relationship they will have when applied to the spindle, whereby the individual pieces may be readily removed from the applicator and positioned on the spindle when the spindle is received within the end portion of the applicator.

DAVID A. AHLSTRAND.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number yNumber Name Date Gusdorf Apr. 26,1921 Brammer Oct. 5, 1948 Lesesne Mar. 7, 1950 Bridges Sept. 12, 1950 f FOREIGN PATENTS Country Date Great Britain Sept. 11, 1919 Great Britain Apr. 30, 1931