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Publication numberUS2218864 A
Publication typeGrant
Publication dateOct 22, 1940
Filing dateJun 23, 1938
Priority dateJun 23, 1938
Publication numberUS 2218864 A, US 2218864A, US-A-2218864, US2218864 A, US2218864A
InventorsCharles A Widgren
Original AssigneeCharles A Widgren
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Means for forming and tempering helical springs
US 2218864 A
Abstract  available in
Images(5)
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Claims  available in
Description  (OCR text may contain errors)

Get. 22, 1940. c A W|DGREN MEANS FOR FORMING AND TEMPERING HELICAL SPRINGS Filed Jun 2:5,

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MEANS FOR FORMING AND TEMPERING HELICAL SPRINGS Filed June 23, 1938 5 Sheets-Sheet 2 A TTORNEYS.

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MEANS FOR FORMING AND TEMPERING HELICAL SPRINGS INVENTOR. 6&1: vlcs A ATTORNEYS.

BY W11 ran "w? 4 t e 9 mm w e Q MN 5 3 y m mw m m e m i J N 15 Q1 JI n A 4 F N? Oct. 22, 1940. c. A.'WIDGREN 2,218,864

MEANS FOR FORMING AND TEMPERING HELICAL SPRINGS Filed June 23, 1938 5 Sheets-Sheet 5 INVENTOR. Vt tz g rlesA. fillgvcn ntJJ. v v 2) JMmdM ATTZ ZfiFYS.

Patented Oct. 22, 1940 UNITED STATES HELICAL SPRINGS IVIEAN S FOR FORMING AND TEDIPERING Charles A. Widgren, Flint, Mich.

Application June 23, 1938, Serial No. 215,414

6 Claims. (01.. -89) The present invention relates to means or implements for forming and tempering helical springs and the like; and its object is, generally, to provide improved means whereby such springs may be shaped into and tempered in certain finished forms, particularly forms in which the ends or end coil portions of the-spring are flattened from helical into plane form, as into planes at predetermined angles to the springs axis, and whereby the spring is heldagainst deformation from such shaped finished form during the tempering thereof; and further, to provide improved means or implements for changing the length of such springs.

These and any other and more specific objects hereinafter appearing are attained bythe illustrative preferable means orimplements particularly described in the body of this specification and illustrated by the accompanying drawings, in

which: v

Figure 1 is'an elevational side View of an implement whereby helical springs and the like may be thus formed and tempered, means for holding the spring therein being illustrated in their inoperative position and certain parts of the implement being shown in longitudinal vertical section;

Figure 2 is a like view thereof but showing said means in operative position and certain upper parts broken away;

Figure 3 is a top plan viewof parts of the same shown partly in horizontal section taken on line 33 of Figure 1, one end portion only of the helical spring being shown in this View;

Figure 4 is a bottom plan view of parts thereof shown partly in horizontal section taken on line 4-4 of Figure 1;

' Figure 5 is a top plan View of the same partly sectioned horizontally on the line 5-5 of Figure 2; Y a

Figure 6 is an elevational left hand end View of parts thereof; v

Figure 7 is a transversevertical sectional view of parts of the same taken on line l-'| of Figure 5; I

Figure 8 is a transversevertical sectional view of vparts thereof takenon line 8-8 of Figure 3;

Figure .9 is a central longitudinal vertical sectional View of the same taken on line 99 of Figure 7;

Figure 10 is a central longitudinal vertical sectional view of the implement, illustrating a modified construction thereof; r

Figure 11 is a transverse vertical sectional view thereof taken on line Hl l of Figure 10;

vFigure 12 is a transverse vertical sectional View of the same taken'on line l2--l2 of Figure 10. V In the manufacture of helical springs their helical shape is usually continued throughout their length or axial extent, so that their ends or end coil portions do not lie in planes, as in planes which are at apre'determined angle (as a right angle) to the springs axis. It is therefore a main object of this invention to provide improved implements whereby such'a. spring may be readily and economically shaped and tempered in the finished form wherein its ends or end coil portions are positioned. in such planes,'so that the springs load will be supported onits fiat ends lying in such planes and whereby the springs may belengthened or shortened in'axial direction.

The helical spring! heated to a proper degree of pliancy is placed in the lower part2 of an elongated container or quenching box.'3 supported as by its leg 4 ma vessel-E5 containing a cooling or quenching liquid 6, as oil, in which said container and the spring withiniit are immersed as indicated iniFigure 2 for tempering the spring in the usual way by the rapidly cooling action of the liquid, which may be circulated through the vessels ports 1, 8 and the containers ports 9, I0.

Means are provided for holding the springs main'portion, i. e., its coils ll intermediate its end coil portions l2; I3, in axial alignment in the container, such means, in their illustrated form, including the longitudinally extending halves I4 of the containers bottom on whose downwardlyinwardly inclined upper surfaces the lowerside of the spring seats, and which halves are spaced by the slot or port Ill through which the liquid may freely flow when the container is being drained in its position indicated in Figure '1; Such holdingmeans includes' also the'lever arm l5 whose convex'end I6 is turnable in a bearing l! in the block l8 slidable in a bearing I9 in the under side of thetop 200i the containers upper part of half 2|, this block being slid in the bearing I9 by a screw 22 threaded therein and journalled in said parts end 23inorder to move said arm longitudinally to adjusted positions for the purpose hereinafter explained. 1

It will be seen that when said upper part or half 2l of the container is slid downwardly on the guide posts 24, 25 by suitable means asby admitting fluid pressure above the head 26 of this arm and the containers bottom as indicated in the views. Thus said main portion of the helical spring I is held in axial alignment during the flattening of its end coil portions I2, I3 and the shaping or forming thereof relatively to said main portion and during the tempering of the spring.

Spaced longitudinally of the container and in the springs axial direction, means engaging the springs end coil portions I2, I 3 respectively are provided for flattening them, for positioning the same in planes at a predetermined angle (in the shown instance, a right angle) to the axis of said main portion of the spring held in the container, and for holding said end coil portions thus flattened and formed or shaped, against deformation during the tempering thereof. Each of said means, in their illustrated form, comprises a pair of cooperating members 29, or 3|, 32, one of each pair as the members 29 and 3|, being relatively movable in the springs axial direction to adjusted positions to accommodate a helical spring of desired length; and the other member of each pair as the members 30 .x and 32, is movable relatively to the members 29 and 3|.

i The member 29 carried by the lever arm I5 is movable to its said adjusted position (which is fixed in the longitudinal direction of said arm and relatively to the right hand end of the container) by turning the screw 22, and the member 3| may be manually moved to its said adjusted position guidedly on the ribs 33 extending horizontally and inwardly from the sides 34 of the containers lower part or half 2 and slidably bearing in notches 35 in the opposite vertical edges of this member 3|. Said member 3| is, as shown, held in its said adjusted position by turning down the screws indicated at 36 to clamp said ribs'between this members clamp blocks 31 and the under side of the notches 35; and, as shown, said member is also held in'its said adjusted position by turning down the screw indicated at 38 to clamp the containers bottoms halves M between. the lower edge of this member and the clamp block 39' which is slidable in the slot II]. It will thus be seen that this member 3| is held, at triangularly disposed points, in the position to which ithas been slidably moved.

The'other members 30 and 32 of the respective pairs are movable relatively to each other and relatively to the adjusted members 29, 3| of said pairs along said guiding means, the ribs 33. The members of each pair have fiat adjacent faces40, 4| or 42, 43, which in their cooperating action extend parallelly with each other and transversely of the helical springs axis.

- The member 36 of the left hand pair and the member 32 of the right hand pair are yieldingly urged apart by coiled springs 44 surrounding the horizontal rods 45 which pass freely through indicated openings. 46 in member 32 and registering openings 41 in member 3|, the separating movement of the members 39 and 32 being limited'by stop collars 48 for member 30 and movable collars 49 for member 32, the collars 49 being held in proper adjusted slid position for a helical spring of such desired finished length by pins 50.

Means are provided for forcibly moving the members 33, 32 sl'idably toward the members 29, 3| of the respeetivepairs by the mutually approaching movement of the containers parts or halves 2 and 2|, such means, in their illustrated form, including the block 5|, on the left hand end portion of the containers upper part or half, for moving the member 30, and the block 52, adjustable to position in the right hand end portion of said upper half, for moving the member 32, this block 52 being manually movable to adjusted position corresponding to the position of member 32 whose stop collar '49 has been adjusted to the proper position for accommodating a helical spring of the desired length.

This block 52 is securedin its adjusted position by suitable means which, in their illustrated form, include screws 53 extending through elongated openings or slots 54 in the top 26 of the containers -supper part or half 2|, and screws 55 extending through such openings or slots 56 in said parts opposite sides 34, these screws having heads and being threaded in this block and turnable for clamping said block in its adjusted position.

The block 5| and its cooperating member 33, and the block 52 and its cooperating member 32 have mutually adjacent relatively inclined side portions which slide on each other in the downward movement of said upper part 23 for wedgingly forcing the members 30 and 32 tor ward the members 29 and 3| respectively. Such inclined portions 58, ,59 of block 5|; Gil, 6| of member 30; 62, 63 of block 52 and 64, 65 of member 32, are spaced in the direction of said blocks vertical movement so that the mutually adjacent faces of the members of each of the pairs are always maintained in parallel relation.

The inner side 66 of member 28 is inclined relatively to its outer side or face 43 so that this member may more readily enter between the end coil portion |2and the next coil in the downward movement of the containers upper part or half. A helical groove as indicated at 31 in Figure 8 may be formed in the face 42 of member 3| for receiving the free end part ofthe end coil portion I3 of the spring so that one end coil portion of the spring will not be completely flattened, in cases where this may seem desirable.

A headed rod 68 extending through the containers top and threaded in the lever arm l5,

with a cushioning spring 63, may be provided for preventing this arm from falling too far when said upper half is raised.

In the modified construction of the implement as illustrated byFigure 10, a member extending in the containers longitudinal direction and engaging one side of the helical spring therein, as the lever arm |5 in the containers closed position, may be provided with spaced inward extensions or lugs 10 engaging between the coils H of the main portion of the spring for holding said coils in properly spaced relation and holding said main portion axially relatively to the end coil portions I2, I 3. These extensions or lugs have inclined sides H for moving these coils into such spaced relation.

This implement is operated, in the following manner:

For adapting the implement to accommodate a helical spring of desired finished length, the lever arm |5 is by turning the screw 22 slid for moving the member 29 to proper adjusted position and the block 52 is slid to proper adjusted position and held therein by turning down the screws 53, 55. The member 32 is slid to proper position for cooperating with the block 52 and is held against the pressure of the coiled springs 44 by adjusting the collars 43 in their proper fixed position, and the member 3| is slid to and held in proper adjusted. position for cooperating with the member 32. The helical spring heated to the proper degree of pliancyand for tempering, is placed in the lower part or half 2 of thecontainer with the transaxial outer side of its left hand end coilportion. I 2 at or adjacent tothe face 4! of the member 30 and. its right hand end coil portion l3 positioned between the cooperating members 3!, 32 of the right hand pair. J

Power being applied, as to the piston 21, the co-ntainers upper part or halfis forced down wardly from its raised position. In this move. ment Wedge shaped member 29 enters between the springs left hand end coil portion [2 and the next coil I I of its main portion and as said movement continues thismember 29, 'frictionally ene gaging the inner transaxial side of said end coil portion or the adjacenttransaxial side of said coil H, causes arm l to turn upwardly until stopped by the bottom of the groove [9, thus causing the face 40 of thismember. 29 to assume a position parallel with the face, of member 30. The members 30, 32- of' the respective pairs are by said downward movement of said upper half now forced toward their cooperating members 29, 3| respectively thus flattening the springs end coil portions l2,- l3 vbetween the members of said pairs respectively into planes at the predetermined angle (in the illustrated instance, a right angle) to the axis of the springs main portion. This same action also forms the spring into the desired finished length.

To this end the parts cooperate in the following manner: Member 29 of the left hand pair carried by or connected to the upper side or half 2| of the quenching box and member 3| of the right hand pair carried by or connected with the boxs lower side or half 2, may be moved in the springs axial direction and secured in desired adjusted positions on said sides respectively. These mem-.

bers 29, 3i thus form abutments or stops for defining the length of the finished spring. The spring is laid in the boxs lower half with the inner side of its end coil l3 adjacent the right hand side 42 of member 3|; the boxs upper half being now forced down, the member 29 of the left hand pair entering between coils l I, I2 determines the position of the left hand end coil l2 and engaging this end coil moves it to the left to lengthen the spring or engaging the adjacent coil ll moves it toward the right to shorten the spring, and this downward movement of said upper half also causes, by means of the blocks 5|, 52, the members 39, 32 of said pairs to move toward the members 29, 3i for clamping and flattening said end coil portions or convolutions.

It will be seen that the lever arm -l5 in the lowest position of the containers upper part 2| engages the upper side of the springs main portion, i. e. the coils H, thus holding said portion in axial alignment, and that in the modified construction shown in. Figure the inclined sides H of the spaced inward extensions or lugs 10 engaging said coils ll move the same into properly spaced relation. The helical spring thus shaped or formed and while held in such shape or form is tempered by subjecting the same to the rapidly cooling action of the liquid.

The spring is thus formed or shaped by bending the same and its portions relatively to each other While heated to a sufficiently pliant degree, and is tempered into finished form and shape while thus held.

The forming of the end coil portions of the spring in planes at predetermined angles to the axis of its main portion is thus effected by positioning the adjacent faces of the members of these pairs at the same angle to the, longitudinal direction of the means I4, l5 whereby said main portion is held in the container.

The invention beingintended to be pointed out in the claims, is not to be limited to why details of the method, or details of construction and arrangement of the particular implement illustrated or hereinbefore shown or described.

I claim:

1. An implement of the class described for shaping pliantly-heated helicalsprings and the like held therein to a predetermined set form, said implementincluding: means at the opposite sides of the implement comprising cooperating members having a mutually approaching movement into engagement with the adjacent sides of the spring for holding the same against transaxial movement, means at one end of the implement engaging one end convolution of the spring for holding said convolution against movement in the springs axial direction; and means at the other end of the implement comprising a pair of cooperating members. relatively movable into clamping engagement with the opposite. sides of the other end convolution of the spring for flattening said convolution and bending the same clamped therebetween into a predetermined plane transaxial of the spring.

2. An implement of the class described for shaping pliantly-heated helical springs and the like held therein to a predetermined set form, said implement including: means at the side of the implement having a movement toward the adjacent side of the spring and having spaced transverse recesses adapted to receive coils respectively of the spring for holding the same against relative movement in the springs axial direction; and means at one end of the implement comprising a pair of cooperating members relatively movable into clamping engagement with the opposite sides of an end convolution of the spring for flattening said convolution and bending the same clamped therebetween into a predetermined plane transaxial of the spring.

3. An implement of the class described for shaping pliantly-heated helical springs and the like held herein to a predetermined set form, said implement including: a pair of cooperating members at each end of the implement the members of each pair being relatively movable into clamping engagement with the adjacent emd convolution of the spring for flattening and bending the same into a predetermined plane transaxial of the spring, one member of at least one of said pairs being movable relatively to the other pair parallelly with the springs axis to an adjustably fixed position for defining the length of the finished spring.

4. An implement of the class described for shaping pliantly-heated helical springs and the like held therein to a predetermined set form, said implement including: a pair of cooperating members at each end of the implement the members of each pair being relatively movable into clamping engagement with the adjacent end convolution of the spring for flattening and bending the same into a predetermined plane transaxial of the spring, one member of at least one of said pairs being movable relatively to the other pair parallelly with the springs axis to an adjustably fixed position for defining the length of the finished spring; and means for moving the members of said pairs into their said engagement with the springs end convolutions respectively.

5. An implement of the class described for shaping pliantly-heated helical springs and the like to a predetermined set form, said implement including: a box having opposite sides connected for mutually approaching lateral movement to a position wherein the spring is held therebetween against transaxial movement; a

" pair of cooperating members'in the box at each end thereof the members of each pair being relatively movable into clamping engagement with the adjacent end convolution of the spring for flattening and bending the same into a predetermined plane transaxial of the spring, one member of at least one pair being connected with one side of the box the other member of the same pair being connected with the other side of the box and one member of said pair being movable parallelly with the springs axis to an adjustably fixed position for defining the length of the spring, the adjustably fixed member being adapted to engage by the approaching movement of said sides the adjacent end convolution of the spring for lengthening or shortening the spring to the limit defined by said adjustably fixed members fixed position.

6. An implement of the class described for shaping pliantly-heated helical springs and the like to a predetermined set form, said implement including: a box having opposite sides connected for mutually approaching lateral movement to a position wherein the spring is held therebetween against transaxial movement; a pair of cooperating members in the box at each end thereof the members of each pair being relatively movable into clamping engagement with the adjacent end convolution of the spring for flattening and bending the same into a predetermined plane transaxial of the spring, one member of at least one pair being connected with one side of the box the other member of the same pair being connected with the other side of the box and one member of said pair being movable parallelly with the springs axis to an adjustably fixed position for defining the length of the spring, the adjustably fixed member being adapted to engage by the approaching movement of said sides of the adjacent end convolution of the spring for lengthening or shortening the spring to the limit defined by said adjustably fixed members fixed position; and a block mounted on one side of the box at each end thereof having an inclined side slidably engaging the movable member of a pair on the other side of the box for moving the same toward the cooperating fixed member of said pair by the I approaching movement of said sides.

CHARLES A. WIDGREN.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2706615 *Oct 3, 1951Apr 19, 1955Zublin John ANormally curved flexible resilient drill guide and method for producing the same
US5868996 *Jul 28, 1993Feb 9, 1999Fried. Krupp Ag Hoesch-KruppDevice for manufacturing curved helical springs
US6305436 *Mar 1, 1999Oct 23, 2001Scimed Life Systems, Inc.Medical stents for body lumens exhibiting peristaltic motion
DE10018476A1 *Apr 14, 2000Oct 25, 2001Alois SchaedlerDosing device for liquid or pasty products e.g. yogurt has stop that may be swung using bolts which are installed to housing
DE10018476C2 *Apr 14, 2000Feb 7, 2002Alois SchaedlerDosiervorrichtung
Classifications
U.S. Classification140/89, 266/130, 266/116
International ClassificationB21F3/06, B21D11/00, B21D11/06, B21F3/00
Cooperative ClassificationB21F35/02, B21D11/06
European ClassificationB21D11/06, B21F35/02