US1777731A - Push-pin - Google Patents

Description

A. PAVELKA Oct. 1, 1930.

PUSH PIN Filed lay 2'7, 192$ l 40 fiedform of thepush-pin.

Patented Oct. 7, 1930 UNITED TATES PATENT.- CE

AN'roN. ,PAVELKA, OEBEBWYN, rumors Applieationlfiled. May 27, 1929. same No. 356,172. 7

i The principal object of the present inven tion is to provide an improved push-pin.

Another object oftlie present invention is the provision of a push-pin Which may be formed by stamping a blank and thereupon suitably bendingthe same to form a push-pin.

A still further object of the present inventionis the-provision of a pushQpin Whichmay be formed out of a stamped blank and Whioh 1:0 may-have a disk, driving end and ahead.

I Astill further object ofthe present inventionis the provision of a method for making a push-pin by suitably forming a [blank stamped out of a sheet of metal;

-With the above general objects in view and others that Will appearas'the nature of the invention is better understood the same 0011- sistsin the novel construction, combination and arrangement of parts hereinafter: more fully described, illustratedlin the'accornpanying drawing and pointed out in the appended claims." Y In the drawing forming a partof this ap} plicatiomand in Which like designatingehan' 2"5 acters refer to corresponding parts through outvthe several views,

Fig. 1 is an elevation'al view, of stamped its 'beingi'ormed into a push-pin;

7 Fig. 2 illustrates one of the steps in making "Fig. {t is across-sectional view th rough the pushapinor'horizontal plane on line of Fig. 5 is a blankior a modified form ofthe pusl1-pin;and' Fig. dis a sideelevationalview ofthe modidravving there is shown on Fig. 1 ablank stamped outofa sheet of metal, including disk 10, from Which'steni 11 radially projects Said blank furtherin- T Referring to the present 5 eludes a flat head 12=vvhieli is made'at" the blankout of asheet of metal preparatory to.

outer end of said stem 11. Projecting from said head 12 at: a pointvvhich is diametrically opposite from the point Where said stem 11 joins said head 12, is'a taperingprong lii,said prong 13 being substantially twice as long as saidsten ll. Said stem 11 begins atthe center of said disk 10 and is integrally formed therewith, its innere'nd being separated from said disk 10 by incisions 14 on lines which are continuations ofthe edge linesjat the free body portion of said stem 11.

Longitudinallyand centrallv said stem 11 and pronglS are angularl y 'bent,;so"that in: cross-section on transverse plane thereof the same ill have a V-shaped forniationasseen on Fig' 4, Th'isis for the-purpose of strength eningthe push-pin, imparting a body thereto and giving ita rounded appearance. l

When thejblank shown on Figll has been 7 completed in accordance with tli eaforesaid (:5 description, said stem ll, head 12 and prong 18 are raised until thesame assume position substantially at a right angle to the body of disk 10, ,as indicated by dotted lines on Fig, 2. "Said'stem 11, head 12; and prongl3 rnay be bent slightly further so astoimpjart to said stem 11 slightly curved or flaring out position. When saidystem 11 head lland prong 13Ywill bebrought t0 the position i'n dicated by dotted lineon' Fig. 2 or in other is Words when the-same will remainiatsubstam tiall y riglit angle to the" plane of thedisk 10, thereivilllresulta recess or slot'l5 disk 10, bordered by edges made by the incision lines'jll'. l l '80 1 :Thereupon head 12 and prongy13 are bent atpoint of junetiire' of stern ll yvith head 12, until said head assumes a substantially rig-ha 1' angled relation. With respeot of I stein 11, or V v until said head 12 shall remain substantially.

in parallelrelation-With disklO.

Thereupon prong1 3 is-bent doWnvv-ardly,

at a point of junotui'e thereof with saidihead 12', as seen 011: Fig: '2, and thereupon? said prong 13is brought Within slot 15 andclose to l to the lower or inner end of said stem 11, the position illustrated in Fig. 3. Said prong while in that latter position may be slightly curved oppositely to the curvature of said stem 11 so that the push-pin may present a neat and symmetrical appearance as clearly seen on Fig. 3.

WVhen said prong 13 is in its operative po sition shown on Fig. 3, thereupon pressure is exerted at the periphery of disk 10 adjacent the outer termination of slot for bringing the two points resulting from said slot 15 and the periphery edge in contact, as seen on Fig. 3, by virtue of which operation slot 15 will assume a triangular formation.

By this means disk 10 w1ll assume a neat and uniform appearance and its periphery will become smooth, and at the same time prong 13 will be clinched within said slot 15 and will be held in position within disk 10. i

The modified form of the invention illustrated on Figs. 5 and 6 includes the identical disk 10 and head 12, but stem 11 is not tapered, but is of rectangular formation. Also prong 13 has a perpendicular form. The outer end of prong 13 is reduced and downwardly tapered, affecting shoulders 16, which, when the blank is formed into a push pin will be adapted to rest upon the edges of disk 10 adjacent slot 15, as clearly seen on Fig. 6. In the modified form of the in vention stem 11 and prong 13 are also longitudinally and centrally bent or ribbed for strengthening the same.

The advantage in providing shoulder 16 in the modified form of the invention resides in the fact that should the push-pin be driven into the wall by employment of a hammer, applying the strokes thereof at head 12, said shoulders 16 bearing against the flange 10 will hold prong 13 in position and will prevent said prong 18 to make any shifting movement with respect to disk 10.

It is to be understood that the push-pin hereinabove described when driven into a wall should be driven until disk 10 will remain in contact with the wall. Thus head 12, stem 11 and portion of prong 18 or 13 adjacent head 12 will provide means for hanging thereupon the desired object.

Said stem 11 as well as portion of prong 13 remaining above disk 10 may be bent towards each other to the position indicated by dotted lines on Fig. 3, which operation will more clearly define head 12 and at the same time will prevent said stem 11 and portion of said prong 13 aforesaid from bending outwardly when pressure is applied at head 12 for driving the push-pin into the wall.

vWhile there is described herein a preferred embodiment of the present invention it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the in vention as claimed.

What I claim as new is:

1. A push pin comprising a disk, a stem integrally formed with the central portion of said disk, a head integrally formed with said stem and being in an angular position with respect to said stem, and a prong integrally formed with said head and angularly disposed with respect thereto, said disk having a radial slot through which the opposite free end of said prong is adapted to project.

2. A push-pin comprising a disk, a head, said disk and said head being substantially in parallel relation, a stem integrally formed with and connecting with said disk and said head, and a prong integrally formed with said head,said disk having a radial slot within which said prong is positioned, the other free end of said prong extending beyond the other side ofsaid disk.

3. A push-pin comprising a disk, a head, said disk being in substantially parallel relative position to said head, a stem integrally formed with said disk and projecting therefrom from its central portion, the other end of said stem integrally connecting with the edge of said head, and a prong integrally formed with said head and projecting from the edge thereof, said prong passing through a recess made in said disk.

4. A push-pin comprising a disk, a head, a stem connecting with said head and said disk, and a prong, said disk having a slot which acconnnodates said prong therewithin, said prong being reduced in width to form shoulders, said shoulders being adapted to rest upon the edges in said disk adjacent said slot.

5. A method of making a push-pin, comprising stamping a blank out of a sheet of metal, said blank including a disk, a stem, at head, and a prong, making incisions in said disk along the lines which are continuations of the edges of said stem, said incisions reaching substantially to the central portion of aid disk, bending said stem at the point at which the same joins with said disk until the same shall be at substantially right angle with respect to the disk, thereupon bending said head until the same remains in parallel relation with said disk, and thereupon bending said prong perpendicularly to said disk and passing the same through the slot resulting from said incisions.

6. A push-pin comprising a disk, a head, said disk being in substantially parallel relative position to said head, a stem integrally formed with said disk and projecting substantially from the central portion thereof, the other end of said stem integrally connecting with the edge of said head, and a prong integrally formed with said head and projecting from a diametrically opposite point at the edge thereof, said disk being provided with alradial slot, said prong passing through said s 0t.

7 A push-pin comprising a disk, a head,

said disk being in substantially parallel relative position to said head, a stem integrally formed With said disk and projecting substantially from the central portion thereof, the 5 other end ofsaid stem integrally connecting With the edge of said head, and a prong inte- 1 grally formed with said head and projecting from a diametrically opposite point at the edge thereof, said disk eing provided with a radial slot extending from-the termination of said stem to the edge of said disk, said prong passing through said slot and adjacent the lower end of said stem; i

In testimony whereof I afiix my signature. i V f ANTON PAVELKA. V

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