US74377A - Improved machine foe poeming eyes on metal eods - Google Patents

Description

it-.liteit tetta gatnnt @Hug Leim Patent No. 14,37% ma February 11, 186s.

Inrnovrn MACHINE-ron roItMINe eres oN METAL nous.

titte .rigtmle referat tu it that tetierattmt ymit mating ni tigt time.

ToALI. WHoMjIr MAY coNcEItN:

Be it known that I, CHBLEB KELLOGG, of Detroit, in the county of' Wayne, and State of Michigan, have invented new and useful Improvements in Machine i'or Forming Eyes'on Metal Rods; and I hereby declare that the following is a. full, clear, and exact'description thereof, which will enable those skilled' in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which l l i V Figure 1 is a plan view of my improved machine, showing the rod placedfthereiu previous to being bent.

Figure 2 is asimilarI view, showing the rod bent by the action of the lever and stud. i FigureI 3 shows the successive stages of formation of the eye. Figure 4`is a section ofthe machine through the line :c g. 2.

Figure 5 is a. section through the'line y y, iig; 1.

Similar letters of reference indicate correponding parte.

This invention relates to the formation of eyes in any metallic rods or bars, but is designed more particularly for the iron rods entering into the construction-vof bridges or other engineering structures, wher-oit is importa-nt to preserve the integrity of iron at the eye, by retaining the normal parallel characterof the fibres of the iron when the eye is being formed. i A i It consists of a frame-plate having an adjustable recess for holding therod o r bar near the eyc to be formed, the said plate being provided'with a. bending deviceof a compound character, together with-other improvements perfecting the whole, as will hereinafter be more fully set forth.

In the drawings, A is the frame-plate, which is in practice of cast metal. Bolted thereto, inthe position shown, aretwo guide-plates, B and C,`the proximate faces of which form respectively the bottom land one side of the recess for holdingthe rod while the operation of bending the eye is being performed. AThe remaining side of this recess is provided by a slotted and bevelled plate, D, the slots a serving to permit its lateral adjustment for di`erent-sized rods or bars, and its bevelled end contributing to the proper formation of vthe eye, as will be shown.

The position and operation of these plates are further shown by the section at iig. 5; the lateral adjustment of the plates B and C being permitted b`y the slots a a, through which' the s crewbolts b pass to secure them to the frame-plate A. Pivoted to the under side of the frameplate is a lever, L, a. part of'vyhich is shown dotted in the plan, ligure, and in section, at iig. 4. c is the pivot-bolt, on which it vibrates to bend the rod or liar, as

shown at fig. 2. Eis a stud screwed firmly into the lever L, in the position shown, This stud projects up through a curved slot, d, in the frame-plate, as shown, and on it as a centre.. The roller-be`aring lever-M vibrates to form the eye of the rod. A segmental guide-plate, G, is bolted to the under side of the frame-plate, and serves as'a guide to 'tlie lever L. The roller-lever M is recessed, as shown, to receive theroller N, which works therein on a spindle, n. The lower part, g, of the lever M is hinged to the collar It, which iits on the stud E, whereby, when the lever M is actuated against the rod to be bent, the collar z. turns on the stud E as a'centre, and the lever M carries the roller N around and against the rofl or bar, thus forming the eye, which operation will be more'specially described hereafter. The roller is provided with-a ange, 1', to: prevent the rod from being deected upward while the eye is being formed. Zis a catch pivoted to the end of the frame-plate, for the purpose of holding the lever L after the latter has put the-first bend in the rod, as shown at fig. 2.

-In the operation of forming the eyes, Vthe levers L and M are placed in the positions shown at. iig. 1. Th rod to be bentis shown in red outline at H. It is bevelled at its end, as shown, for the purpose of forming the joint with the rod, when it is returned upon the same in the formation of the eye. This rod being heated t0 the proper degree, is entered between the guides C and D, and pushed forward a certain suitable distance, so that the bevelled part shall just return upon the rod when the eye is formed. The levers L and M, in practice, are proportionately longer than is now shown, and terminate in handles for operating them. The lever M is permitted by its hinge to take the position shown at iig. 1. The lever L is'placed in the positionjgshown in this' figure, whereby the bar or rod H will pass between the studE and the plate-D. The lever L is then moved to the position` shown at iig. 2, bending thel rodH, as shown at that iguro. The catch l, theend of which rested on the lever in 'its rst position, now drops its catch part over the side of the lever, and holds it rmly in the second position.v The lever M' is then turned through-the several positions MMl M", shown at fig. 3, which operation of turning forms the eye. hy the action of; the roller m bearing against theA rod or bar in the manner indicated. The hinge serves to permit the withdrawal of the rllerdan`gerfrom contact with the stud-E, s o`that the rod or bar can be enteredbetwee'n the same', lor withdrawn therefrom after the eye is'f'ormed. Theyiiange r operates in contact with the stUdE, `as shown, for another purpose besides theone aboveset forth, this latter -Purpose being to prevent'the u'n'due' compressionordrawingout oi''th'eeye irhile itis being formed. Th'e plane surface 'of the plate B is in the same plane with the upper surface of the coll-ar h, whereby theA eye is formed straight with rod.

5" The peculiar advantage of my improvements consists in the fact that the eye is formed without undue compression or hammering, which latter action destroys, in a great measure, .the parallel character of the fibres o r grain of the metal, which parallel character is a requisite conditior'to the normal strength of the rod; for by hammering or other-undue or unequal compression-of the metal, the latter is rendered more or less defective fromthe crystallization ot the libres,`-or their induced tendency to such'crystallization. i

In bridges and other engineering structures,'eyelrods or bars are employed to sustain a certain calculated K strain, and While the strength of thev rodear bar can be'ascertained and relied upon, the formation of the eye,

means of hammering or equivalent'compression, as heretoforedone, destroys, more or less, the integrity of 'the metal at lthat point. The breaking ofsuch eyes has been the' cause of many calamitous accidents.

I am aware that a machine forbending'lwire has been made, which is remotelysimilarzto the one `above set Aforth, (see case of N. E. Perry', No. '35,2559 but this machine, aside from its bending lever, has Ano other point of similarity, and could not be made available for the objects above mentioned. It contemplates the bending of Wire, and the nature of .its construction rendering that employment possible only with it,

I'claim as new, and desire. to secure by Letters Patentl 1. The lever Land studE, or their equivalents, substantially as shown and described, in combination with the plates B C, oli-their: equivalents, and the adjustable guide-plate D, or itsrequivalent, all constructed, arranged, and'operating substantially as' and for the purpose set forth.

'2. The lever M,4col1ar L, ange'd roller N, and thestud E, or other equivalent'deyicc, substantially as shown i and described, and for the purpose specified.v

3. 'llh'e Vsubjectfniatterof the first claim, in'combination with the catch l, or its equivalent,'substantially as shown and described, and for the'purposc set forth.A v

4. The improved bending apparatus herein described, operating in the manner-ond for the purpose substan.

Vtially as set forth. I y I CEAS. KELLOGG.

Witnesses:`

E. R. BLAGK'WLL,

ADoLPHUs BoNzANo.

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