US487618A - Loop-riveting machine - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

E. H. GRIFFIN. LOOP RIVBTING MACHINE.

110,487,618. Patented Dec. 6, 1892..

2 Sheets-Sheet 2.

(No Model.)

B. H. GRIFFIN. ,LOOP RIVBTING MACHINE.

Patented Dec. 6, 1892.

UNITED STATES PATENT OFFICE.

ELVIN H. GRIFFIN, OF SOUTH BOSTON, VIRGINIA.

LOOP-RIVETING MACHINE.

SPECIFICATION forming part of Letters Patent No. 487,618, dated December 6, 1892.

Application filed July 13, 1892.

To all whom it may concern:

Be it known that I, ELVIN H. GRIFFIN, a citizen of the United States, residing at South Boston, in the county of Halifax and State of Virginia, have invented a new and useful Loop-Riveting Machine, of which the foll0wing is a specification.

My invention relates to that class known as riveting-machines, and in particular has reference to a machine for riveting loops of leather, which are needed and used extensively in the manufacture of harness, straps, and other leather articles, wherein it is desired to rivet two or more extremities together.

My invention has for its object to provide a device of this character so arranged and constructed that the loop to be riveted can be readily placed in position to receive the rivet, and then by a single movement of the operator the rivet can be forced into the adjacent ends of the loop and there securely and effectually clinched.

My invention has for its further object to arrange and construct the several and essential parts of the machine in such manner as to render ease and precision in operation and adjustment; that the rivets and articles to be riveted can be readily inserted and removed, and that all parts may be interchangeable and durable in use.

For the attainment of these several objects my invention consists in certain details of construction, arrangement, and combination of parts, all of which will be more fully described hereinafter, and the specific points of novelty in which will be particularly pointed out in the appended claims, forming a part hereof.

Before proceeding into a detailed description of my invention I desire it to be here understood that certain mechanical and equivalent changes can be made from the parts illustrated and described without in the least deviating from the spirit or scope of my invention as defined by the appended claims.

Referring to the accompanying drawings, Figure 1 is a side elevation of my invention complete, showing the auxiliary parts in op- Serial No. 439,930. (No model.)

erative relation to each other. Fig. 2 is a detail view of the loop-holder, shown removed from its supporting foot-piece. Fig. 3 is a detail side elevation taken on opposite side of machine, as shown in Fig. 1, to show the manner of controlling the presser-foot.

Like letters of reference indicate like or corresponding parts in the several views of the drawings.

A indicates the framework of the machine, consisting of the base-plate B and the vertical supporting plate 0, substantially arcshaped in side elevation, and comprising the foot-piece D and the horizontally-projecting head-piece E, occupying the same vertical plane as the foot-piece D, and serving to support and receive certain operating parts 01f? the machine, as will be described hereina ter.

Between two parallel upwardly-extending trunnion -arms a a is pivoted the actuating hand-lever F, having the horizontal cam-lever 11 projecting at a right angle therefrom and connected at its other or farther extremity to the vertically-reciprocating plunger or riveter G by a flexible loop or yoke H, which latter is made of any suitable elastic or flexible materialsuch as spring-steel or rawhideand is attached at its lower portion in any ordinary manner to the plunger G, but is connected to the cam-lever b by means of an intermediate or interposed U-shaped spring 0, horizontally placed on the upperside of cam 19, with its under side or arm fastened to said cam-leverb, and after being helically coiled at 6 has its upper horizontally-proj ecting finger or prong fsecuredat its end to the flexible yokeH. Thus it will be seen that in a position of rest (see Fig. 1) the plunger G is normally held by means of the yoke H and the tension-spring a up in contact with the face of the cam-lever b in operative position, so that any forward and downward movement of said cam will cause immediate depression of the plungerrod G by reason of its impingement against its actuating-lever b, which in turn is operated by hand-lever F, having a retracting spring g, suitably placed in the rear thereof, bearing against lever F, and thus serving to normally hold the same in the position shown in Fig. 1 ready for operation.

The head-piece E of the framework is, as shown, provided with a rectangular-shaped opening or recess h, designed to give access to the operating parts for repair or lubrication. The top and bottom walls of said recess are respectively perforated with relativelysitnated circular apertures, severally in vertical alignment with each other, to permit the vertical operation of the plunger-rod G and the presser-bar I, arranged parallel to the rod G, and designed to be elevated and depressed at the will of the operator in a manner and for a purpose that will hereinafter appear.

J designates the anvil or holder designed to receive and hold the loop or other article to be riveted, and to that end consists of a loop of spring-steel or other approved metal fastened in horizontal position on the footpiece D, the loop or bend being in the rear, while the two extremities i 41 are brought together opposite each other in the same vertical plane, the upper horizontal spring-arm t" of the loop being free to exert its tension upwardly, while the under arm t' is rendered inactive, being secured to the foot-piece D in such manner that sufficient space is left under its extreme portion or end to admit the insertion of the article to be riveted over the ends 1 t of the anvil J, when it will be held securely from displacement by the upward tension of the spring-arm t" pressing the unjoined or unriveted extremities of the article against the presser-foot K, which in operation is pressing down upon the anvil J, and also upon the interposed loop on the anvil, as will be understood from subsequent description.

The presser-foot K is secured to the lower end of the presser-bar I, and is so shaped and constructed as to bear upon and hold in position the contiguous ends of the article or loop to be riveted,as before stated, and, moreover, has a suitably-shaped opening j, running vertically therethrough, designed to receive, hold, and permita rivet to pass through when the latter is forced into the ends of the article by the downward descent or plunge of the plunger-bar G, which carries at its lower end a rivet-punch orhead Z, shaped to suit the form of rivet used and of asize permittinga snug passage through the openingin the presser-foot. Thelatter is normally heldin contact with the anvil J by means of the retractingspring m, having its upper end pierced to permit free movement of presser-bar l and bears against the under side of the head-piece E, while the lower extremity is rigidly attached to the presser-bar, near the presserfoot, through a circular perforation in its end, and is there held upon said presser-bar against slipping vertically up or down by two adjusting-nuts n n, respectively above and below said lower end of spring m, and capable of vertical adjustment by hand by threads formed for that purpose on the presser-bar in such manner that the tension of spring m can be variably adjusted at will, and consequently the degree of pressure of the foot K according to demands or in consequence of the thickness of the article to be riveted.

The presser-foot K can be raised from contact with the anvil J by use of the ordinary treadle L, connected to and controlling the movement of the presser-bar I by the intermediate link-rod n pivoted at 0 on the framework and slotted at its upper end to engage a pin 12, projecting transversely from presser-rod I through a vertical slot q in the head-piece E. Thus by asingle movement of the foot of the operator the presser-foot can be raised and the loop riveted on the anvil removed and another placed ready for another operation.

As will be seen by an inspection of Fig. 2, there are two parallel grooves 'r r in the end 2" of the anvil J, to insure the clinch of the rivet ends when forced through the ends of the leather against the metal underneath.

Having described my invention, what I claim is- 1. In a loop-riveting machine, the combination, with a presser'foot, a base below the same, and a spring-anvil having an upper branch pressing upwardly against the foot, of a punch or riveter and means for reciproeating the punch, substantially as specified.

2. In a loop-riveting machine, the combination, with a rivet-holder, a vertical operating rivet-punch adapted to pass therethrough, and means for actuating the same, of a U-shaped spring-anvil, the lower branch of which is secured to and slightly above the base of the machine and the upper branch of which presses upwardly against the under side of the holder, substantially as specified.

3. In a loop-riveting machine, the combination, with a perforated rivet-holding presser-foot, a rivet-punch adapted to pass therethrough, and means for operating the same, of a U-shaped spring-anvil, the lower branch of which is secured to and slightly above the base and the upper branch of which presses upwardly against the foot and is perforated for the passage of the punch,substantially as.

specified.

4C. In a loop-riveting machine, the combination, with a spring loop or anvil for holding the article to be riveted, of a combined rivet holder and presser foot, a retractingspring for normally holding said presser-foot in operative position, a rivet-punch, and a system of levers for actuating said punch, substantially as specified.

5. In a loop-riveting machine, the combination, with a spring loop or anvil for holding the article to be riveted, of a spring-actuated presser-foot in engagement therewith, a my own I have hereto affixed my signature :in retracting-spring for normally holding said the presence of two Witnesses. presser foot in operative position, and a treadle and intermediate system of levers for ELVIN H. GRIFFIN. 5 controlling the removal of the presser-foot Witnesses:

from the anvil, substantially as specified. J. J. HILL,

In testimony that I claim the foregoing as T. T. LAWSON.

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