US1482151A

US1482151A - Metallic fastener

Info

Publication number: US1482151A
Application number: US502972A
Authority: US
Inventors: Rosenberg Heyman
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-09-24
Filing date: 1921-09-24
Publication date: 1924-01-29
Anticipated expiration: 1941-01-29
Also published as: FR550794A; DE381841C; GB186576A; NL12665C

Description

Jan. 29, 1924.

H. ROSENBERG METALLIC FASTENER vFiled sept. 24. 1921 like parts to Patented Jan. 29, 1924-.

HEYMAN nosENBERG, or NEW YORK, N. Y.

METALLIC FAs'rENEn.

`Application led September 24, 192.1.` Serial No. 502,972.

.To all whom t may concern.'

Be it known that I, HEYMAN RosENERG,

a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Metallic Fasteners; and I do hereby declare the following tobea full,clear, and exact description ofthe invention,such as will enable others skilledin the art to which it appertains to make-and use the same. This invention relates to improvements in fastening devices, and more particularly to the type of pins employedfor securing together plates of metal.

The object in view is the provision of means for quickly and easily.v and yet effectively, securing name plates, metal tags, or the frame of machinery, or for securing together thin plates or sheets of metal, or for securing' thin plates or sheet metal to heavier sections of metal. l

A further object is the provision of such a securing means adapted to -interlock with the engaged parts in a mannerto resist re' moval ofthe securing means.

With these and further objects in View" as will in part and in part be stated, the invention comprises certain novel constructions, combinations and arrangements of parts as subse uently specified and claimed.

n the accompanying drawings,-

Figure 1 is a view partly in side elevation and partly in section showing an embodiment of the present invention in the position of first introduction preparatory to being forced to its seat, the parts being shown-on a greatly magnified scale.

Figure 2 is a similar view of the same after seating.

Figure 3 is a transverse section taken on the plane indicated by line 3-3 o'f Figure 2, and looking downward.

Figure 4 is a view similar to Figure .2, 'illustrating the connection of two sheets or thin plates of metal.

- Figure 5 is a fragmentary, vertical section taken on the plane indicated by line 5--5 of Figure 2.v

Figure 6 isa -view similar to Figure 2 of a slightly modified embodiment. j Figure 7 isa view similarto Figure-il of a further slight. modification, the parts shown on a somewhat reduced scale 'aperture 8 of a being but still magnified beyond actual size.

hereinafter become apparent to that clearly wood screw in that -upon the hardened threads.

only a. comparatively slight distance about` the body of the pin 1 in the course'of their length from the head 3 substantially to the other end of the pin. The pin l extends beyond the ends ot' the threads 2 in the forni of al smooth, cylindrical portion 4,'

pilot and also which serves as a guide or Flgure 5, the

as aY lock. As best seen inpilot 4 is of slightly greater diameter thanv the diameter of thepin l at the places of the valleys or grooves which appear between the threads 2, thus leaving a shoulder 5 at the upper terminus ofthe pilot 4 between the lower ends of each two of the threads 2. The threads 2 are madeo hardened material so as to cut their way into or through the substances -through which the pin 1 is passed, and for purposesof convenience in manufacture, the. pin may be of case-hardened iron or steel so as to provide the requisite hardened cutting threads 2 at a minimum cost of manufacture. Reference in the appended claimsto the fact that the threads are hardened will be readily understood by engineers and mechanics as directed defined .distinction uni'- versally recognized in the metal industry between hardened metal andsoft metal. Metal working tools are hardened in order to enable them to enter or cut the same metal in its soft state', and the reference to the hardcned threads, therefore, is to be taken to mean that character or condition of' the threads distinguishing threads offv thesoft iron of the conventional the hardened threads are able to 'cut or enter soft iron or. soft steel substantially without injury to or effect Hence, the

reference to the hardened condition of the them from the` The threads 2 are threads in the appended claims is to be taken in each instance to signify that degree of hardness enabling the threads to enter or Vcut metahrsuch as soft iron and soft steel,

substantially without injury to the threads.-

In' applying the pin 1, Vafter the manner indicated in Figures l, 2 and 3, a sheet 6 is to be secured to a plate 7 or other part of a machine, and the sheet 6 is formed with an diameter equal to or slightly larger than the greatest distance between the cutting edges of opposite threads 2, and the part 7 is drilled to form a bore 9 equal substantially to the diameter of the pilot 4.

The pin 1 is placed in posit-ion, as indicated in Figure 1, with the pilot 4 extending into the bore 9. The head 3 is then struck by a hammer or other suitable implement until the pin is driven to the position indicated in Figure 2. During this driving action, the metal of the part 7 will be severed by the several threads 2 and caused. to iow at the opposite sides'of said threads into the valleys therebetween and to a position overhanging the shouldered portion 5 of pilot 4. Thus the metal of the part 7 is caused to effectively lock the pin 1 from being withdrawn. The frictional action of the metal engagingA the side walls of the several threads 2 c o-operates in retaining the pin in its seated position. The pin rotates somewhat as it is being forced to its seat, as seen in Figure'2, corresponding to the degree of pitch of the threads 2. As the threads 2 extend angularly partway about the body of pin 1, the pin vis primarily a. screw, unctionlng in part as such but also functioning asa rivet, the

pilot end being anchored by the interlock of materials as above described in lieu of being swaged up. into the form of a head.

In Figure 4, the securing means consists of the same parts above described and the lsame referencenumerals havebeen applied,

the pin l'in this instance, however, having been driven through the sheets or thin'plates 10, 10 for securing the same .together by the screw-threads and interlocking action above. described. The lower plate V1()V is provided with an aperture corresponding to the bore 9 of the device seen in Figure 1, and the upper plate with the lar er opening so that the cutting action of t e threads 2 occurs only relative to the plate 10. VThe location and function of the lpin is thus identical with that above described, differing only in being applied to slightl diiferent material. Obviously, when the pi ot portion 4 of the pin protrudesit may be swagedupunless excessive. case-hardening prevents.

In Figure 6, the structure shown is identical with that set forth in Figures 1 and 2and the same description will apply exceptthat the head 3 is formed on the pin .1 which has the overhanging beveled surface 1'1' adapted to be snugly seated withinthe recess 8 of the plate 6', the -head 3being fiat and designed to liewith its fiat face flush with the upper surface of the plate 6'. The other parts of the structure seen in Figure 6 being identical in detail and function `with those .above ldescribed require no further discussiom :f-.While "the parts indicated by the referencenumeral2 have .been referred to as threads in view of their angularity and their resultant functioning at timesin a manner somewhat similar to a screw thread of high pitch, the said parts are obviously ribs ywith valleys between, andthe parts are so proportioned that the distance between balance of the structure shown in vFigure 7 n being identical with the details shown in Figures 1 and 2, the same description and reference numerals are applicable. The application of the structure seen in Figure 7 for attaching plates or sheets together follows the same principle of operation as that of Figure 1, but instead. of employing hammer blows for driving the pin to its locking position, it is forced into place by the employment of a screw-driver which is applied in the usual manner, except that maximum pressure is employed for thrusting the pin longitudinaly while only slightly rotat-mg the same.

Thus itbecome's apparent .that the securi ing means is a rivet-like pin, and at the same time is, in fact, a form of screw so that it may be properly termed a driven screw whether driven by a screw driver -through excessive longitudinal pressure and slightl torsional pressure or through Adriving blows while dependingupon, the angularity of the threads for causing the required angular movement.

By scientiically-conducted tests it has been proven that the present pin or driven screw has the same or greater capacity `for Securing metallic parts together as that of a rivet of equal size, and will resist separation of such connected parts under the same or greater stresses. lIt has also been made apparent from carefully conducted experimentation that stresses tending to separate metallic plates connected by the improved driven screw herein disclosed ,cause the metal engaged byv the hardened threads to flow suiiciently to clog between the threads and thus resist withdrawal movement to the same or greater extent as the resistance of the head of a rivet.

It is not essential that the exact pitch of on the' other hand by being high enough to permit the screwto be driven into an The pitch may be increasedl or opening in metal of. a diameter substantially equal to the diameter of the body of the screw while the threads enter the metal What is claimed is vl. A fastener comprising a pin-like body having high-pitched threads extending longitudinally on the body, and an interlock formed on the body`of the pin and adapted to be engaged by the material caused to move by the action of the threads in reaching their final position.

2. A fastener for metal work comprisin a pin having a head at one terminus an a pilot at the opposite terminus, and being formed with high-pitched, hardened screw threads extending from the pilot to a pin-like body the head, the diameter of the body of the pin measured from one of the grooves between threads lto a diametrically opposite groove being less than the diameter of the pilOt.

3. A fastener for metal work comprising a pin having a head at one terminus, hardened, high-pitched'threadsl extending along and angularly about the body ofI the pin from the head toward the other terminus thereof and terminating short of the length of the pin, and means on the body of the pin adjacent the ends of the threads for underlying. and interlocking with metal caused to flow by the action of the threads in arriving at a seated position.

4. A metal fastener comprising a pin having a hardened thread terminating short of the enteringl end of the pin, and means at the terminus of the thread for underhanging and interlocking with metal caused to flow by the action lof the thread.

5. A fastener for metal work comprising having hardened threads of sufficient] high pitch to permit the-driving of the go of a transverse area less than a circle described about and touchin the exposed edges of the threads, and su ciently low to effect rotary movement of the body incident/ to the action of the threads engaging the metal when the body is being driven-into such opening, there being a sufficient number of threads to cause each cf the 1threads to occupy substantially as much space as the space between any two consecutive threads for causing a clogging action` between the threads by the metal engaged thereby when-the pin is subjected to a withdrawing stress after being driven 1nto such opening. y

6. A fastener for metal work comprising' dy into an opening in metal "a pin-like body having hardened threads of sufficiently high pitch 'to permit the driving of the body into an opening in metal of a tnansverse area ess than a circle described about and touchino the exposed edges of the threads, and sufficiently low to effect rotary movement of the body incident to the action of the threads engaging the metal when the body is being driven into such opening,`there being a' suicient number of threads for causmg the spaces between the threads to be equal substantially to the spaces occupied b the threads.

7. A fastener for meta work comprising a pin-like body having a pilot atv one terminus and formed withv high-pitched hard- -ened threads extending along the body, the

base of one of the grooves between threads to the base of a diametrically-opposite grloove being less than the diameter of the i ot. f

p 8. A fastener for metal work comprising a vpin having hardened threads extending longitudinally thereof at such a high pitch as to enable the pin to' be driven into an opening in metal of less diameter than the greatest distance between diametricallyopposite points on thev exposed edges of the threads and sufliciently low to, cause the pin to move angularly as the pin is being driven in, lthe threads being sulicient in number to occupy spaces substantially equal to the spaces between threads and being arranged sufficiently close to each other to cause metal flowing between the threads to wedge therebetween and lfrictionally resist withdrawal of the pin.

9. A fastener for metal work comprising a pin havin a substantially cylindrica body and har ened threadsl extending along the pin and. of sufficiently high pitch to allow thepin to be driven into an opening 1n metal of substantially the same diameter. as

the body, a portion of the body extending beyond one terminus of the threads for forming' a pilot.

10. A fastener comprising a pin-like body having a rib extending along the body, and a pilot at the entering end of thebody outstanding beyond the base of the rib.

11. A fastener comprisin a pin-like body having ribs extending a ong the body with valleys therebetween, .and a pilot at theentering end of the body of greater diameter than the distance between the bases of diametrically opposite valleys.

in presence o two witnesses.

HEYMAN ROSENBERG.

Witnesses: v

CHARLES K. KRUPITZKY, C. G.W1LTSELEK.

In testimon wherof I aflix my signature