US1619537A - Spring-eye bender - Google Patents

Description

March 1,1927. 1,619,537

. V AJ. o. PARRlsl-l y SPRING `EYE BENDER Filed Aug. ll. 1924 2 Sheets-Sheet l March 1, 1927.

J. O. PARRISH SPRING EYE BENDER Filed Aug. 1i. 1924 '2. sheets-sheet 2 VIII/lg? fvll/A VII www* Patented Mar. 1, 179273.

UNITED STATES l JACOB o. rARIusH;v or roivroNA, CALIFORNIA.

SPRING-EYE BENDER.

vApplication filed August 11, 1924. Serial No. 731,444.

This invention relates to benders and consists of the novel features herein shown, described and claimed. p An object is to makera machine especially adapted for bending eyes on springs and adapted for making any desired round `or angular bend on the end of a flat bar.

Other objects and .advantages will appear from the drawings and specification.

The drawings illustrate the .construction and operation of the invention. y

Fig. 1 is a perspective of the bender, the parts being disassembled ready to receive an article to be bent.

Fig. 2 is a view 'analogous to Fig. 1 and showing a.r flat bar such as a leaf-spring in place ready to be operated upon.

Fig. 3 is a sectional elevation Vwith ythe parts in 'place and a bend partly made.

4 4 of Fig. 3 and looking in the indicated by the arrows. l

Fig'. 5 is a fragmentary.perspective show- 'ing the end of a spring witha round eye as made in my machine.

6` is a fragmentary diagrammatic view showing how a right angled bend may be made. n 3 Fig. 7 is a fragmentary perspectiveof a right angled bend made as shown in Fig: 6. The`details of construction and operation shown in the drawings are as follows:

Thebender bed 1 is a piece of heavy channel iron turned flat side up and mounted on direction a strong bench 2 with the operating endvr Guide posts 3,v

extending from the bench. 4, 5 and 6 havetheir lower ends bent at right angles so as to fit upon the bench 2 against the sides of the bed 1 andextend upwardly from the bed 1. The posts are secured to the sides of the bed 1 by rivets 7 and are secured to the bench 2 by bolts 8. A bearing plate 9 ts across the bottom of the bed 1 just in front of the bench 2 and may be weldedto the side flanges Vof the bed 1. An eccentric 10 fits against the bearing plate 9 and a U-shaped plate 11 tits the eccentric and has side flanges 12 and 13 connected tothe plate 9 by bolts 14 and 15. Bearing bars 16 and 17 tit against the sides ot' the bed 1 and against the ends of the eccentric 10, and the rear ends of the bars 16 and 17 have transversely alined slots v18, and

Fig.'4 is a vertical cross-section on the line a pivot bolt 19 extends through the bed 1' and loosely through the slots 18. Bearing place by rivets 22. The bearing plates 2O and 21 extend below the bars 16I and 17 and` have bearings in which the pintles 23 and 24 of the eccentric 10 are mounted. A handle `25 is lixed upon the 4pintle'23 for operating The bar 3() to be bent fits upon theV bed 1 Y and` projects forwardly a: slight distance trom the forward end of the bed. The eccentric handle 25 1s operatedto raise the heads 26 and 27 and the mandrel 31 is inserted through the openings 28 and 29 over plates 20 and 21 lit against tlieroutsides of i Vthe bars 16 and 17 and are rigidly held in the bar 30 and the handle 25 again operated to lower the heads 26 and 27 and hold the mandrel 31 and the points or' the openings 28 and 29 serve to accurately center the mandrel and bring it into the same position at each operation.

The heads 26 and 27 are spaced from the sides of ythe bed 1. The bending lever heads 32 and 33 have heart-shaped openings 34 and Y 35 with centering points 36 and 37 in transverse alinement and theV lheads 32 and 33 lit against the sides of the bed 1 inside of the heads 26 and 27 with the mandrel 31 engag-` ing in the pointsr 36 and 37 ot' the openings.

Arms 38 and 39 extend from the heads32v and 33 and a cross bar 40 extends loosely through the arms 38 and 39. A tongue41 is welded to the cross bar40 at its'center and Y is slidingly mounted through a bearing 42. The bending` member lo extends from the bearing42 over the cross bar 40 between the arms 38 and 39 and between the heads 32 and 33 and has straight operating edge 44 parallel with the mandrel 31. A pipe 45 extends outwardly from the bearing 42 and a handle 46 has ahead 47 rotatably engaging the outer end ot' the pipe 45 and the tongue 41 extends through the pipe 45 and is screwed into the head 47. through the head 47 and into the handle 46 is oit considerable length and the thread upon the tongue 41 is of considerable length The bore 48` so that by rotating the handle 4G the tongue 41 is screwed in or out in the bore 48, thereby adjustingV the position of they straight edge 44 relative to vthe*mandrel31o-.as required to bend a larger' or smaller eyeon the bar 30.

Normally the mandrel 3l is out of position, the bending lever is disconnectedyand" and themandrel 31 inserted through the heads 26 and 27 and 32 and 33 with the handle` 46 hanging downwardly, the lever 25 is :operatedlto tighten theimandrel against the Abar ,30, .and the` handle 46 ris swung forwardlyand upwardly 'in `the direction indi-` cated` bythe. arrow 49 and theedge 44 engages under the end of the bar 30 and bends the `bar upwardly andaround the mandrel 31 as shownin Figxthereby producing the round-eye50upon1the'bar 30, as shown in Fig. 5. Then the handle 46 is swung baclc. wardly to its dependingposition, the `handle 25 operated torelease the mandrel 31,\and the mandrell ,is removed `from the eye 50, and then thebar SOcarrying the eye 50 is removed fromthe bed 1.

` Theparts 32` to 48 constitute thebendingflever 51.` Vhen the parts of the bendingk lever have been properly fitted` and adjustedfor a certain size mandrel it only requires a slight adjustment to .iit a larger or smaller .mandrel The posts 3, 4, 5 and 6 are intended to serve as guides to hold long bars straight` upon the bed 1.

In .the process `of making rightangled bends as shown :in Fig., 6, a square .block 52 may be placed upon themandrel 31 .and the bender levermay have a right angled foot 53 toengage the bar 54 `and press the-end of the bar upwardly against the block 52 and makea square-bend 55, asshown in Fig. 7.` Of course, the angles and adjust` ments may be varied to suit dierent kinds of work;

The pintle 24 `extends some distance throughthe bearing plate 21 and is squared.` A segmental pawl rack 56 is mounted upon the squared end of the pintle 24 and held in place by cotter 57. A pawl 58 is pivotally mounted "upon `the pivot bolt 19 and engages the rack 56. A weighted handle 59 extends forwardly and upwardly from the pawl 58 and is adaptedto press the pawl 58 against the pawl rack 5G and is adapted to serve as a handle to raise the pawl out ot engagement i with the rack. rack serve to hold the eccentric 10 in its adjusted position to grip and hold the mandrel 31 while the bending operation is being done.

Then the barBO is placed ind The pawl and having a working-fy edge concentric to the' mandrel.

2.L Abend.er.1co1nprising a bed, bars pivotally mounted against-the sides ot' therbed and having heads with alined mandrel openings at theufree ends of the barswand near oneend of the bed, an eccentric mounted under the bedJ for `operating `thebars, aA

bender vleverV having Aheads with mandrel openings ittinginside `of the first` heads, the` mandrel openings being heart-shaped Vwith their points upwardly, and a mandrelloosely inserted across the bed through-theopen-` ingsnof the'lever andb ars,fthe lever lhaving; a working edge concentric tothe mandrel.V

3. A bender comprising a bed, bars pivotally mountedagainst the sides of the bed and having heads with alined. mandrel openings at `theffree ends `of the bars and-1 .nearone end of` the bed,.an eccentricanount.-

ed under the bed for operating theibars, aA

bender lever having heads with mandrel openings fitting inside of the Vfirst heads, the

vmandrel openings being heart-shapedwith their points upwardly, and a mandrel looselyinserted acrossnthe bedthrough the openings of the lever an'd"bars,`the lever having an adjustable s working `edge concentric l to the` mandrel. Y i

4. In a bender, a bed `adapted to be`rig`.

idly mounted and adapted to' receive the `articleto be bent, bars pivotally mounted.l

against the sides of the bed `and having heads with llarge alined mandrel openings" at one end of the bed and at the freeends of the bars, bearings extending downwardly from the bars, an eccentric mounted under thebed and havingpintle's,extending intothe'bearings', anda lever for the eccentric.

5. A bender comprising a bed, bars piv-` otally mounted: against the sidesof the bed and having heads with alined mandrel openf ingsat the ifree endsof the bars,..an'eccen tric for operatingthe bars, a pawl and rack for holding the eccentric, `a bender lever having mandrel openings, and a mandrel loose-ly inserted across the bed through the operating o )eninnsof lthe `lever and'barsthe lever having Va working edge concentric to the mandrel; y i y l 6. A device of the class" described com# prising a bed,` a mandrelfbars pivotally mounted upon the bed having heads adapted to press the mandrel toward the bed, an eccentric rotatably mounted upon the bed adapted upon rotation to raise or lower the bars, means for rota-ting the eccentric, and means for bending an article positioned on thelbed beneath the mandrel about the mandre 7. A device of the class described comprising a bed, a mandrel, bars pivotally mounted upon the bed having heads adapted to press the mandrel toward the bed, an eccentric rotatably mounted upon the bed upon the under side thereof between the pivotal connection of the bars and the heads thereon, said eccentric being operatively connected to the bars so that upon rotation of the eccentric the bars may be forced toward or away from the bed, means for rotating the eccentric, and means for bending an article placed between the bed and the mandrel about the mandrel.

8. A device of the class described comprising a bed, a mandrel, bars pivotally mounted upon the bed having heads adapted to press the mandrel toward the bed, an eccentric rotatably mounted upon the bed rip-f on the under side. thereof between the piv' otal connection of thecbars and the yheads thereon, said eccentric being operatively connected to the bars so that upon rotation of the eccentric the bars may be forced toward or away from the bed, means for rotating the eccentric, means 'for bending an article placed between the bed and the mandrel about the mandrel, and a ratchet mechanism for holding the eccentric in that position n which the bars are tightly holding the mandrel against the article.

9. A device of the class described comprising a bed, a mandrehmeans for clamping a mandrel against an article upon the bed, a bender lever having arms which pivot upon the mandrel for bending the article, said bender lever having a tongue pivotecl upon said arms, means movable upon the tongue carrying a bending member adapted to engage the article, and a handle threaded onto the tongue engageable upon said means whereby upon rotation of the handle the bender member may be moved toward the mandrel and upon swinging the bender lever the article. may be bent around the mandrel.

10. A device of the class described comprising a bed, a mandrel, means for clamping a mandrel against an article upon the bed, a bender lever having arms which pivot upon the mandrel, atongue carried by the arms, a sleeve disposed about the tongue and movable thereon and carrying a bending member adapted to engage the article, and a handle threaded onto the tongue engageable upon said sleeve whereby u on rotation of the handle the bender mem er mounted on the sleeve may be moved toward the mandrel and upon swinging the bender lever the article may be bent around the mandrel.

In testimony whereof-I have signed my name to this specification.

J. O. PARRISH.

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