US1762747A - Compressed-spring machine - Google Patents

Description

June 10, 1930. rr j 1 1,762,747

COMPRESSED SPRING MACHINE Filed Oct. 23, 1928 0 "VV 9 l INVENTOR Ally/9w 51m:

Patented June 10, 1930 PATENT OFFICE ANDREW E. SMITH, OF SEATTLE, WASHINGTON COMPRESSED-SPRING MACHINE a pucauon'fiiea October 23, 1928. Serial No. 314,526.

The invention is a machine for making springs which is adaptable to compress the spring after it is wound and hold it while upon a mandrel which may be removed from the machine so that a casing may be placed over it to hold the spring in the compressed state before it is released by the holding means of the mandrel.

The object of the invention is to provide a machine formaking springs which is adaptable to hold the spring in a compressed position until a cover which is adaptable to hold it in the compressed position is placed over it. I I

Another object of the invention is to provide a machine for making springs in which the spring material is evenly fed to the mandrel of the machine.

Another object of the invention is to provide means within a mandrel for compressing a spring from'both ends while the spring is on the mandrel.

' A further object of the invention isto provide a mandrel for a spring winding machine which may readily be removed.

And a still further object of the invention is to provide a spring winding machine which is of a simple and economical construction. p

With these ends in view the invention embodies a mandrel, rollers positioned below the mandrel and on each side of the center, meshing gears at the ends of the mandrel and rollers, a feeding device, means for movingthe feeding device, and means in the mandrel for compressing and holding a spring thereon.

Other features and advantages of the invention will appear from the following description taken in connection-with the draw-- ings, wherein:

Figure 1 is a side elevation of the machine with parts broken away;

Figure 2 is a cross-section through the mandrel and rollers on line 22 of Figure 1;

Figure 3 is a detail-showing the mandrel removed from the machine and a canvas covering placed over the spring;

in'Figure 6. from the top downward to the point l as Figure 4; is an end elevation showing the arrangement of the operating gears;

Figure 5 is a detail showing the removable tipson the ends of one of the clamping members; and

Figure 6 is a detail showing the remov able socket at the ends of the mandrel.

In the drawings the device is shown as it would be made, wherein numeral 1 inclicates the mandrel, numeral 2 the base, and numeral 3 a spring that may be made upon the mandrel.

The mandrel 1 is made of a cylindrical shaped piece of material with slots 4 and 5 in its outer surface and adjacent the ends, and each end is provided with a tongue 6 as shown in Figure 6 which extends into groove 7 in a member 8. The member 8 is mounted in a bearing member 9 which is held in the end members 10 and 11 ofthe frame, and it will be observed that the upper portion ofthe bearing 9 is omitted from the inner end 12 thereof to the point 13 as shown This open portion extends shown in Figure 2 so that when the mandrel is in'the position with the larger end of the tongue 6 upward it may be removed from the top of the machine, however, when the larger end of the tongue is downward or toward either side the wall of the bearing 9 will hold the tongue in place. It will also be observed that the tongue 6 and the slot 7 are tapered as indicated by the dotted lines shown in Figure 2. The bearings 9 are located at each end of the machine so that the mandrel is rotatably held at each end and although this type of bearing is shown it is understood that a bearing of any other suitable type may be used.

In the center of the mandrel is a shaft 15 having right-hand threads as indicated by the numeral 16 adjacent one end and lefthand threads as indicated by the numeral 17 adjacent the other end and on these holds one "end of the spring and the ends of mandrel with themandrel out of the ma chine. The members 21 may be held in the member 19 by ,any suitable means, however,

in the design shown they are provided with tapered circular portions 22 that are held in sockets 23 as shown in Figures 2and' 5; It;

will therefore be observed that these'members may readily be placed'through the slots 5 with the members 22 placed in the sockets 23 and the compression of the spring against" the sur'face 24' will wedge the members221 into'the-sockets and rigidly hold them in :place. One'end' of therod15 is'..journa led. within the end or the mandrel as indicated by the'numeral' 25 and the opposite end. which is alsojournaled in the mandrel eX- tends 'beyond'the' end of the mandrel as indicated by the numeral '26. A crank 27 may'be place'd'fupon the end26 of therod 15 and in theidesign shown the end ofthe rod is' squaredandQthe crank is provided with a square-"hole sothat the 7 rod may readily be turnedby the crank. The inner surfacebf the hub of the crank is also provided with teeth :28 which are adaptable to engage similar teeth 29 onithe" outer. facefof 'the member 8' so "that'the 'crank'may. be movedfinward: until the teeth engage when it is desired to rotatepthe'mandrel It is also understoodthatthe 'mandrelmay be rotated 'by 'any othersuitablelmeans and a motor'Qoi"apulley may be pi'o'vided'j. The

member S'jatj the'end of the mandrel is also providedwith a gear 30 which meshes with. gears 31 and 32 upon rollers 33and 34 which are rotatably' mounted in the end, members 10 and 11" 'ofithefraine and itwillflbe ob! served that as the mandrel is rotated the gears will rotatQt-he, lower rollers. A

A f eding-device 35, having a 'threadedhub 36 is mounted upon a threaded rodv 37 so that asthe rod is rotated the membe rz will move' from oneen'd to, the other-'ofthe ma ber 35jis piioi' ided -with an opening 37' through which the spring wire? jbe i'ed and the lower end of thememberi is provided with a opening 38. thatis may be'made in the construction withoutde parting fronithei spiritof the invention,-one

of which chahge mayb in:the general de- '.rotate the rod 15 slidable on a bar 39. The screw ,87, is rotatably mounted in the end"members 10" andll and oneend of.

the screw is, provided with a gear. 40 which I mandrel, clamping screw 37 andmove the member35 tofeedthe spring wire.

sign or arrangement of the machine, another may be inthe use of other'means for removmeans for operating the machine.

,The constraction will be;readily i1nderstood from the foregoing description.

bleda'as shown and'the end of the wire held in the member 20. Themandrel may then be rotated by the crank or any other suitable means andas it is rotated the spring material'will be fed through the 'member 35 will be moved backward so that it will only. and as it is turnedthe meme.

end of the tongue 6 is at the top sothat it To I use the'device the machine may be assemto the mandrel andwhen a spring. of a suit- Iable lengthfhas been, formed the crank; 27"

bers 1 8 and 19 will move toward each other and compress and hold the spring. The mandrel may then be rotated until the-large g may readily be removed. Acanvascover-j mg may then be placed-over the. spring as indicated by the numeral 41 andv the canvas maybe sewed and held by awire or cord as: indicated by the numeral 42, When {this covering is secured to the spring the rod...

15 may then be rotated so that the members j 18 and 19 will move away from thege'ndsof the spring and then the members 21 maybe removed from the member 19 so that the spring may be removed fromthe end of the.-

mandrel. the device It will; therefore beobserved v i may be used for mak ing a spring -5 and also holding it'until afcovering isiplac'ed 2 ;over it to hold it in the compressed statebe fore itis removed from the mandrel of the, d

niachi-ne;

. Having t us fully sealed the iara- 2 what I claim as newand desire to secure by Letters Patent,'is: 1 v w p 1. In a spring-winding 'machin'e of the'f class described, a frame, a removable mam of a spring that may be woundfthere'on,

chine, and it will be observed that the memmeans-for releasingthe said 'spring holding" means, rollers cooperating with the said to the mandrel, tating the said ing device.

2. Ina device of and suitable means for 'ro-' members projecting from the sides of the saldv'mandrelfand means a mandrel, means projecting from the sides:

drel in the said-frame, mea'nsin the said I I the class describedyg,

within the said mandrelfor movingthe said T a p ng em ers toward Qli away [from- 1; each other., I In a device of the character described,

of the said mandrel for holding the ends of a spring that may be wound thereon, means within the mandrel for moving the said holding members backward or forward, and means for removing the tips from one of the said holding members. i m

4. In a device of the class described, a suitable frame, a mandrel rotatably supported within the said frame, means for holding the ends of the mandrel whereby it may be readily removed, holding members project ing through slots in the said mandrel, means for moving the said holding members toward or away from each other, suitable rollers cooperating with the said mandrel, and means for rotating the said mandrel and rollers.

In testimony whereof I affix my signature.

ANDREW F. SMITH.

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