US925052A - Tire-protective rivet. - Google Patents

Description

' E. B. STIMPSON.

TIRE PROTECTIVE RIVET.

APPLICATION IIL'ED JAN. 28, 1908.

925,052. Patented June15,1909.

, g Wmzm 8 l1 1 35%,61H0m1 4 i T alliivhom it. may .concem'k rivet within my inv'ention;;,Fig. 2is a top already described inhavmg first, a non-1nber 1, a shank-2, and a concavo-convex memto start with a washer-like disk such as in in Tire-Protective Rivets, OfWlIIClI the following 1s a specification...-

show a bl'ank'in twostagesin a PATENT OFFICE.-

EDWIX BA LL STIMPSONfOF BROOKLYN, NEW YORK ASSIGNOR TO EDWIN Bi STI'MPSON i COMPANYfA CORPORATION OF NEW YORK.

l Be'it known that 11 EDWIN- BALL Srrarrl soX, a citizen of the United States, and a i resident of the borough of Brooklyn, county" of Kings, and State of.-Xew York, have invented certain new and useful Im rovements .The objectof therif et ofmy present in vention-is toprovide in advantageous form a rivet adapted to, protectautomobile tires and the like from wear andat thesame time preventfslipping andfskidding. I p

In the drawings which show some of the forms whichmyrivet ma'ytake, Figure 1 is a vertical mid-section partly in elevation of a plan viewofthe rivetofFig. 1; Figs. 3 and 41 referred method of forming one member of t e rivet; Fig. 5 is a perspective view of a modified I form of rivet as same would appear if out in two parts by a vertical mid-section, portions being shown in elevation; and Fig.6 is a per. spective view of a modification of one member of the rivet as same would appear cut in two parts by a verticalimid-section.

Describing now my invention with particular reference to the forms of rivets shown in the drawings and reserving it to the claims to point out the novel features, the rivet of Fig. 1 is seen to comprise a cup or base memher 3. In this particular form the shank is integral with the base member. Also it will be noted that the concavo-convex member is located in the cup with its convexity outward and that it is secured in such position by the infolding of the cup against its outside. The result of the construction is a rivet having a head and a shank wherein the head is hollow. The top of the head has an opening 4 through it, thereby providing especially effective uoad-biting edges to prevent slipping and skidding. This 0 ening is through the concavoconvex mem er; and said member will ordinarily be of hardened steel.

The concavo-convex member and the opening therethrough may be formed in a number of ways, but the preferred method is Fig. This is then given a dome-like form as in Fig. 4. This method is preferred over 1 startin with a dome and thereafterboring a j verticaT walled opening through its top, since J 5; Specification of Letters Patent. M appl i caition filed. January 28,

'double advantage, first, of being more e Patented June 15, 1909.

190a; Seria1'No.412,971.

so effectively in gripping the roadas the pre ferred method, whereby referring to Fig. 4 it will be noted that the edges of the opening through the concavo-convex member are presented at an angle to the road and havin the ive initially than the same opening with ver- "tical walls and secondly, of wearing off more suitably as the rivet is used.

'While the method'as described in connection with Figs. 3 and 4 of forming the concavo-convex member and its 0 ening is preferred as giving superior resu ts,,nevertheless it is not to be considered as necessarily essential to the practice of the invention.

The rivet shown in Fig. 5 differs from that tegral shank 2, and second, in having an additional member 7 interposed between the shank and the concave-convex member. Thus it will be notedthat the cup or, base member 1 of Fig. 5 has an opening through its bottom andthat the shank membeinprol'ects from said opening and is headed at 8 to be too large to pass completely through it; thata member 7 which may take a variety of forms is located in the cup before the latter is inturnedagainst the concavo-convex member; and that the particular form shown of this member 7 is a solid pyramid or cone of a size adapted to have its ase bear against the headed portion 8 of the shank-member while its point projects through the opening in the concavo-convox member, between which member and the headed portion of the shank said member 7 is confined.

The result of. the construction is thatthe shankmember is supported from within to hold its shank in projecting position from the hollow rivet-head, whereby the free-end of the shank can be conveniently riveted,

The projecting point of the member 7 engages the road through the opening in the concavo-convex member. .After the point has worn off and the opening itself has-worn to a larger diameter, the member 7 will not drop out, at least not until the opening shall have become worn very large but will move loosely about in the hollow of the rivet head and present various points and edges of itself through the opening in the concavoconvex member which, cooperating with the edges of said opening, will assist in preventing slipping and skidding.

i I the latter does not present road biting edges I lfect- I shape of the rivet head.

i In 6 a modification of the concaveconvex member is shown in which in forming the opening therethrough, instead of completely punching out the material, it is slitted to form points 9 which are bent outwardly to form road-contacting'pro'ections at the periphery-of the opening. T

under icy conditions,vand may be used as a substitute for the concavo-convex member either in Fig. '1, or in Fig. 4.

f The expression "box-like usedin some of the claims is intended to bring out the idea'that the head of the rivet, so specified,

is'substantially-inclosed like a box or a rece tacle, but this expression is not to be ta en as implying anything as to the recise not to be implied that the head is rectangular, or otherwise. As a matter of fact, the rivet head inJhe preferred form shown has considerable resemblance to aflattened hollow ball.

Having thus described my invention, what I claim 15-;

1. A protective rivet comprisinga shank and a hollow boxelike head; the head having a rigid base and a concavo-convex upper portion springing fromthebase with its con-, vexity upward and having an opening through its top, the rim of which contacts a with t e road, and the shank pro'ec'ting from the bottom of said hollow box-1i e head and having no contact with the concave-convex portion of the head. I

form of concavo convex memberv is especially efiective.

or examp e, it is 3. A protective-rivet comprising a hollow i head having an opening through its b0. sin;

a shank promoting from said opening, having a'heade portion, too large to pass through it; and a member located in the hollow head and extending between the top of said member and the headed portion of the shank.

4. Aprotective-rivet comprising a hollow head consisting of a base and a concaveconvex member securedwith its convexity outward upon the base, said base and concavo-convex member each having. a. 1 o ening therethrough; a shank projecting rom the opening through the base and having a headed portion too large /to pass therethrough; and a member ln the hollowhoadj extendin between the concavo-convox meniher and t e headed portion of the she 11k and having a projection extending through the opening in the concavo-convex member.

In witness whereof, I have signed my name to the foregoing specification in the presence of two subsoriblng witnesses.

I EDWIN BALL STIMPSON. Witnesses:

Jos. F. OBRIEN,

W. SoHERR, Jr.

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