US2578021A - Method of making a locking ring and plate assembly - Google Patents

Description

Dec. 11, 1951 SANDBERG 2,578,021

METHOD OF MAKING A LOCKING RING AND PLATE ASSEMBLY Original Filed March 26, 1946 2 SHEETSSHEET 1 K O O c a O C 4 A E o o I o J( ZZZ/5277GT Pay A. Sana hwy Dec. 11, 1951 R. A. SANDBERG 2,578,

METHOD OF MAKING A LOCKING RING AND PLATE ASSEMBLY 2 SHEETS-SHEET 2 Original Filed March 26, 1946 Ray ,4. Sam/berg Patented Dec. 11, 1951 I UNITED. STATE TENT OFFICE METHOD or MAKING AVLOCKING RING AND :PLATE ASSEMBLY 2-Claims (Cl.113121) This invention-relates: to. improvements :ina locking. ring and plate assembly. and to a new andi novels method of making the. same,. the assembly being ofrthe character highly desirable for use. iniacontainer fora-oil filteringv cartridges onthelike, although the invention will have. other uses and purposesasi will be apparent. to one skilled in the art..

This. application is adivision of my co-pending application entitled: Filter Cartridge Container and Methodof Making: the. Same," filed; March 26,1946; Seria1;l\I0.: 657,121..

In the. past; many andvarious typesgofinterlocking assemblies havebeen made to hold parts together against the-action. of spring, resilient, or. other. means tending. to vseparate those. parts, andfrequentl the pressure; of the means tend.- ingzto separate the interlocking partswas applied to;:the 1 weakest portion ,of'the structure.- Also, wheregxtheqtwomarts of. the. interlocking assembly were .made of, separate pieces, that is, initially different pieces, some difiicultywas frequently experienced. in endeavoring to make the pieces fit.

preperlyafter having been mass produced. I Like- WiSfi'ii Considerable sacrifice in economy and manufacture has resulted from previou methods of making such interlocking assemblies in the past.

With the foregoing in mind, it is an important object of .the instant invention to provide a locking ring and plate assembly of such character thatlboththe ring and plate are formed. from anflinitially single piece blank of material..

Itis also a featureof thisinvention toprovide a,- 1ocking ring, and plate assemblyof such char.- aeter that theonly-metalwaste during the prodnctioncf both parts resides in the provision of openings ,or apertures in the plate, if such are esired.

Still anotherobject .of this invention i the provision of. a new and .novel method of making a locking ring and plate assembly.

A. further feature. of the invention resides in the provision of .a. new and. novel method of making a loekingring assemblythat results in the provision of an interlocking" ring and, plate that may be producedwith greatrapidity and mass production with the proper fit betweenthem alwaysassured.

Still another object of this invention is the provisionofanew and novel method ofmanufacturing a locking ring and plate assembly that is capable of withstanding heavy pressure, and which is so constructed that .anyload imposed upon the. relative parts is. transferred .to the location of the interlockbetween the parts and. with the instant assembly, the interlocking, portions are otconsiderablearea...

It is :also .a featurepf the inventionton provide a locking ringandplate assembly wherein; the parts may be interlocked with each other or dis.- engaged :with greatrapidity, stop means being provided to insurethe proper interlock between the parts even upon careless handling,

While some of themore salient features, char acteristics and advantages, of the instant invention have been abovepointed out, others.will become-apparent from the following disclosures, taken in conjunction with the accompanying drawings, in which:

Figure 1 isafragmentary verticalsectional view, with parts'in elevation, of an oil filter casinglequipped with a lockingring and. plate assembly embodying improvements of the instant invention;

Figure 2 is a plan vView of the structure of Fig. ure 1 with the cover removedto illustrate. more clearly the assembly of this invention;

Figure 3 is a plan View of the lockingri-ngand plate assembly alone, illustrating early steps in the formation of these parts under the method involved in this invention; and

Figure 4 is a central vertical sectionalview through the. assembly itself illustrating later steps'in the process of forming theiassembly.

As shown on the drawings: 7

InFigure 1 the illustrated. embodiment of this invention is shown in association with a cone tainer for an oil filtercartridge, one example .of a use of the instant invention. In that showing, the container comprises a casing. I generally of cylindrical shape, and it is to be assumedthat the casing has a closed bottom with theexeeption of an .outlet opening. The upper, portionin the casing is stepped outwardly asinclicated at 2 to provide a cylindrical mouth margin-3,01 greater diameter than the body ofthe casing. At one point near its upper end, the casingmay be provided with an inlet fitting 4 through which oil .orother fluid to be .filtered may enter the casing. a

Inside the casing I is a center outlet tube 5 of which at least the upper portion, as illustrated, is. preferably constructed of a fine filtering material such as powdered .metal, orwhich maybe an extremely fine mesh screen. Seatedon the upper end of this center tube is a hollow cap 6, and a rod! secured to a'lower portion of this structure extends through both the filter portion 5 of-the center tube and the cap. On the outer extremity of this rod is a'nut 8. which, when tightened; holds both the filter portion 5 of the centertube-and the cap 6 in position.

Around the center tube 5 is a filter cartridge 9.of .any -satisfactory' known construction, such cartridges being centrally apertured for such positioning in a container. When dropped into a container, such a filter cartridge seats upon a suitable gasket to close the lower end thereof around the central aperture, in substantially the same manner that the upper end is likewise closed by means of a gasket In which may be held tightly in position by a collar ll carried on the lower end of a coiled spring [2, the upper end of which is engaged with an internally threaded nut l3 that may, if'so desired, be permanently secured to a dome-shaped locking plate I. In the illustrated instance such securement may be established by virtue of a stem of reduced diameter on the nut projecting through an aperture in the locking plate, and the parts being brazed or equivalently secured together.

The locking plate It is removably engageable in an interlocking manner with a locking ring l5, and when so engaged, the spring I2 exerts a downward pressure upon the collar I l and gasket l'to hold the filter cartridge 9 in the casing against rattling, and to prevent'any escape of fluid to be filtered through the end of the central opening or inside tube of the cartridge.

The locking ring I may be brazed or equivalently secured to the upper marginal portion 3 of the casing I, if so desired. In this position it reinforces the mouth end of the casing and terminates flush therewith to provide a better seat for an annular formation 3 on a dome-shaped cover IT. This cover is centrally apertured to accommodate a bolt I8, the threaded shank of which is engageable in the aforesaid nut III to tightly clamp the cover in position. While this is done, regardless of the force used in the clamping operation, all reactive stresses are transferred to the marginal interlocking between the plate It and ring IS, a location that can adequately and readily bear the load. With reference more particularly to Figures 1 and 2, it will be seen 4 the teeth 25 on the plate pass through the spaces between the teeth 20 on the ring, and when the teeth 25 have dropped below the level of that the locking ring, generally indicated by numeral I5, is angular in cross section and includes an upright cylindrical portion l9, and the lower margin of this portion is turned inwardly at sub stantially right angles and cut to define a series of spaced teeth or projections 20. As seen clearly in Figure 2, the line of cut defining the space between adjacent teeth 20 is extended at one end along the base of the respective tooth as indicated at 2|, and the free end portion 22 of the tooth is then preferably turned downwardly as seen clearly in Figure 4. When this portion of a tooth is turned downwardly, the top edge thereof is at the same time beveled or rounded to remove the relatively sharp corner.

The locking plate, generally indicated by nu:

meral M, if put to the use shown in Figure 1-,

preferably is provided with a centrally domed portion 23 which merges into an outer substantially horizontal annular portion 24 also'cut to define spaced teeth or projections 25 therearound each of which is of a size to pass easily through i the space between adjacent teeth 20 on the ring l5. Also, when used as illustrated in Figure 1, the plate It should be provided with a central aperture 26 to receive the aforesaid clamping bolt l8. To facilitate manipulation of the plate to and from interlocking engagement with the ring, the plate may also be provided with one or more apertures 21 or equivalent formations, if so desired.

the ring teeth, a simple turning of the plate will bring the teeth 25 beneath the teeth 20 to eflect the adequate interlock. The downwardly turned ends 22 on the ring teeth 20 provide an automatic stop to the turning movement of the plate when the interlock is established. Of course, with the plate and ring used in the manner shown in Figure l, pressing down of the plate is against the action of the coiled spring 12, but some resistance against the plate at that time actually aids the interlocking operation rather than making it more diflicult.

My novel method of making the plate It and locking ring l5 will now be described with reference more particularly to Figures 3 and 4. In connection with these figures, it should be understood that the plate II is in inverted position relatively'to the position of that plate in Figures 1 and 2. At the start of the method, a single blank of stock is drawn to substantially the shape seen in Figure3. After the drawing operation, the locking plate is severed from the locking ring in a manner to define the teeth 20 from the ring and the teeth 25 on the plate, such severance occurring along a staggered line of cut indicated by numeral 28 in Figure 3. Simultaneously with this cutting operation, or immediately thereafter, the holes 26 and 21 may be punched in the dome portion of the locking plate, if the holes are desired. After the cutting operation, with the parts now appearing substantially as seen in Figure 4, a restrike is made upon the locking plate It to slightly reduce its diameter so that the teeth 25 will pass freely through the spaces between the teeth 20 on the ring. This operation complet es the formation of the locking plate.

In connection with the ring, after the plate has been removed therefrom by the cutting operation, like end portions 22 of each tooth or projection 20 are struck downwardly as indicated by the dotted lines in Figure 4 and the upper corner portions beveled or sheared off to provide a relatively smooth upper face to the ring. Upon the completion of this operation, the locking ring is finished.

' It is to be especially noted that in this method of making the locking ring and plate, there is no waste metal, or substantially no waste metal, since the amount of metal lost by the provision of the apertures 26 and 21 is clearly negligible. Thus, the manufacture of the locking plate and locking ring is extremely simple, and highly economical, resulting in the provision of equally strong parts that are obviously accurately fitted relatively to each other. Of course, it will be understood that if the locking plate is not desired with a central dome portion, that portion of the plate may be given some other configuration, and the apertures 26 and 21 may be provided if desired, and omitted if desired.

purpose to limit the patent granted hereon oth- When it is desired to interlock the plate l4 with the ring l5, it is a simple expedient to position the plate relatively to the'ring so that erwise than necessitated by the scope of the appended claims.

I claim as my invention:

1. The method of making a locking plate and locking ring assembly, including the steps of severing a single disc-like blank of material to provide both the plate and ring bycutting the disc along a line of cut to define an inner circumferential row of spaced teeth on said ring and an outer circumferential row of spaced teeth of less width on the plate and extending the line of out along the base of each ring tooth at one end thereof a predetermined distance, restriking the plate to reduce its diameter sufficiently to pass through the ring, and bending down said one end of each tooth on the ring to function as a stop to insure interlocking of the plate and ring teeth when the plate is inserted through the ring and rotated relatively thereto.

2. The method of making an interlocking assembly, including the steps of drawing a single blank to a desired shape, striking out the intermediate portion of said blank along a tortuous line of cut to form spaced outward projections on said portion and spaced inward projections on the border part around said portion and extending the line of out along the base of each border projection at one end thereof a predetermined distance, restriking said portion to reduce its area sumciently for the projections thereon to pass readily through the spaces between projections on said border part, and bending down said end portions of the projections on said border part to act as stop members to insure releasable interlocking of the intermediate portion and border part when said portion is passed through and rotated relatively to the border part.

RAY A. SANDBERG.

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

UNITED STATES PATENTS

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