US286390A

US286390A - Island

Info

Publication number: US286390A
Authority: US
Publication date: 1883-10-09
Anticipated expiration: 1900-10-09

Description

(No Model.) 2 Sheets-Sheet 1 J. A. COLEMAN.

EAGHINE FOR MAKING HORSESHOE NAILS.

N0. 286,390. Patented Oct. 9, 1883.

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J. A. COLEMAN.

MACHINE FOR MAKING HOREESHOE NAILS.

UNITED STATES PATENT JOHN A. COLEMAN, or PROVIDENCE, nnonn ISLAND.

MACHENE FOR MAKING HORSES-HOE-NAILS.

'irscrrrcnrrorr forming part of Letters latent No. 286,390, dated October 9, 1883.

' 7 Application filed April 25, 1883. (N0 model.)

' tion, reference being had therein to the aceompanying drawings.

This invention relates to certain new and useful improvementsin machines for the manu' faeture of nails, it being especially designed forthc production of horseshoe-nails, and having particular reference to that class in which a series of operations are performed, which are substantially as follows: A bar of iron rolled to a widthapproximately equivalent to the length of the nails which are to be formed therefrom-is provided at its opposite edges with projecting ribs, which furnish the additional metal required for the heads of the nails, and

is subjected to the action of a pair of punches,

which at each stroke separate from it apair of blanks approximately the size of the nails, the heads of these blanks alternating in opposite directions. The punched blanks are then conducted to pairs of .rollers provided with forming-dies on their faces corresponding to the configuration of the nail, and the blanks, in passing between the rollers, are subjected to strong pressure and molded to the required form. Two pairs ofrollers are usually employed,.the first pair, in this instance, being adapted to squeeze and elongate the blanks and approximately shape the nails, and the second pair being adapted to further draw and taper the partially-formed nails and reduce them to the desired shape. Finally, these nearly-completed blanks pass from the second pair of rollers, and are presented tothe trimming-punches, which press them through dies and strip or remove the protuberances of metal from their edges and, trim them to their finished shape.

My invention has for its object to provide means for presenting the blanks edgewise, as contradistinguished from sidcwise, to the first pair of rollers.

My inventionhas for its further object to present the edges of the blanks, as contradistinguished from theirsides, without the aid of manual manipulation, as they leave the cutting dies to the action of the first pair of rollers.

My invention has for its further object to provide means for first presenting the edges of the blanks, as eontradistinguished from their sides, without the aid of manual manipulation, to the action of the first pair of rollers, and to next present their sides, as contradistinguished from their edges, to the 'action of the second pair of rollers.

- This machine is an improvement on the one for which I filed an application December 21,

In the accompanying drawings, forming apart of this specification, and on wh1ch like lettersof reference indicate corresponding features, Figure 1 represents an end elevat1on of the rollers in elevation; Fig. 3, a side eleva tion of the forming-rollers and of the feedingconduits, and Fig. 4 a view showing the trimming-punches and the lower section of the conduits. g

In the drawings, the letter A indicates the frame'of the machine, which is constructed of metahand provided with suitable bearings for the shafts and working parts; and the letter B, the main driving-wheel, which is mounted upon a suitable shaft, 13, having its bearings in the machine and in a suitable bracket secured thereto. This shaft is provided with a pinion, B", and on its inner end with a similar pinion, B; the former intergearing with the cogwhecl I), mounted upon a shaft, D, which carries a 0 through which motion is imparted to the I bell-crank F, whereby the devices employed for feeding the blank-bar are operated, this feature of the inventionbeing more fully illustrated and described in my application for a .pa tent on horseshoe-nail machines'above all uded to. This shaft 0" is further provided with an eccentric, C, which is adapted to re- 7 die which forms the blank receiving its head attached to the shaft E,- by which motion is I die-blocks of the rollers are of the configuraimparted to the trimming-dies, a crank or arm, F, being secured to this shaft and suitably connected with the sliding head F, which carries the trimming-punches, these several features being also more fully set forth in my applica tion above alluded to. The said shaft 0 is also further provided with an eccentric, F over which is fitted an adjustable strap,havin g a connection with a rod or pitman which operates the cutting-punches.

The letter F refers to a reciprocating slide mounted in suitable ways, which receives its motion from the bell-crank lever E and which is provided with pivoted depending fingers adapted to bear upon the upper edge of the bar ofmetal from which the blanks are punched and to advance the same at certain intervals to be acted upon by the cuttiiigpunches.

The letter G indicates the cutting-dieslocated opposite the cutting-punches, these dies being reversed in position, so th at thehead of the blank passes through the upper end of one and the lower end of the other, whereby they form blanks with their heads alternating in opposite directions, as seen in Fig. 2. At the rear of the from the upper edge of the bar is located a tripping-stud or obstruction, G, for the purpose of tripping such blanks and causing their heads to uniformly descend downward. These dies communicate with feed-conduits, that portion of the conduits immediately adjoining the rear of the dies being made flexible or yield ing, so asto give in case of accidental crowding of the blafiks, suitable alarm or stop mechanism being connected withthe parts of the conduit which yield, in order to sound an alarm or stop the machine, the peculiarities of which appear more fully in my application above alluded to. i

The letter G indicates the conduit which conducts the blank whose head comes from the upper edge of the bar, the said conduit being constructed in several independent sections; and the letter G" indicates the conduit which conducts the blank whose head comes from the lower edge of the bar, it being likewise constructed in several independent sections, the peculiarities of both of which will presently appear.

The letter H refers to the first pair of rollers, and the letter H to the second pair of rollers, each of which pairs is-journaled in suitable bearings in the frame of the machine and adapted to receive rotation in the manner above pointed out. These rollers are provided with die-blocks, constructed and applied in the manner set forth in my application of which mention has already been made. One

essential difference exists, however, between tion of a side view of the blanks, as contradistinguished from an edge view'thereof. One

of the rollers of each pair is provided with a cam plate or block, which acts against the lower arm of a pivoted three-arm lever, H, the other arms of these respective levers be:

ing respectively attached to a spiral spring, 7 5,

which returns them to their normaLposition and to pivoted nail presser-feet H by means of pins and slots. These'presser-ieet are guided at their upper ends by pivoted levers 1, their pivotal points being attached, prefera- 8d bly, to the frame of the machine. The lower ends of the presser-feet are adapted to normally fit within slots formed in the sides of the conduits, and are provided with concave depressions, which, when the presser-feet are 8 forced into the slots, bear down upon the points of the blanks, and by reason of the con cavity of the seat bring the nails into a vertical position, and at the proper moment force them past the arresting-springl into engageo ment with the dies. The intermediate sections of the conduits are jointed, as seen in The upper of these 5 the sleeve for the purpose of yieldingly sup- 10o porting said portion of the conduit, The 0bj ect of this construction is to admit of a slight yield or movement of the conduit on the blanks becoming crowded. I contemplate connecting this yielding part with an alarm or stop mechanism, as before alluded to. The I lower sections of the conduits are provided with hinge sides and mechanism for operating them, as seen in Figs. 3 and 4, the trimmingdies and punches being supplied, as described 1 10 in my application before mentioned, the ob j ect of the said dies and punches being to re move the protuberances of metal from the edges of the blanks in order to give the blank the properpoint and form the finished nail.

The above description of the several parts of this machine 11. ve been given in order that the essential feature of my invention may be understood, and I would call particular attention to the same. It consists in providing the feed-conduits with helical twists, the said twists being necessary in order to carry out my invention, as hereinbefore indicated in speaking of first operating on the edges of the blanks, as contradistinguished from operating on the fiatsides thereof. This necessity arises from the fact that the blanks, as they descend from the dies into the conduits, are in such relative position to the dies on the rollers as to first pre sent their flat sides thereto. Again, the twist nail if rolled first upon the edges.

turn in that directiomwhereby the edges thereof are presentedto the face of the roller-dies. When, however, the blank receives its head from the lower edge of the bar, the conduit is twisted in the opposite direction, or from right to-left, in order to reach the same result; but the direction of the twists of these conduits, respectively, may be reversed. After the blanks have thus been acted upon on their edges, and have passed through the first pair of rollers, it is evident that it is necessary to give them a quarter-revolution about their axes, in order to present their flat sides to the second pair of roller-dies, and to accomplishthis end I provide the second sections of the conduits with the helical twists, both conduits being twisted in the same relative direction. The object in first acting upon the edges of the nails is to save in the consumption of material, as I have found by practice that a shorter blanksay'for a No. 6 nail (when rolled first upon the flat sides)will make a No. 8

The reason of thisis because the blanks are wider the edges, the length of the nail is obtained by the elongation of the blank, the width being thus forced intb thelength. Then the second rolling upon the fiat sides is simply to shape the blank and give it atapering form by making the sides converge toward the point. trimmingdies then remove a slightchip of metal from the edges of the blank, near the point, and thus produce a finished nail.

7 Having thus fullydescribed my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination, with two pairs of nailforming dies revolving in the same plane and operating successively on the same blank, of a spiral or twisted guide or channel interposed between said revolving dies, to turn the blank axially partly around during its passage from one pair of dies to the other, substantially as set forth.

2. In a machine for the manufacture of nails, the coinbinatioinwith the punches and dies,and

The-

the forming-rollers, of the feeding-conduits, the upper and lower sections of which are pro vided with helical'twists, whereby the blanks are first presented to the rollers on their edges,

es and the forming-rollers, having their dies of the configuration of an edge and a side View of the blanks, with the feed-conduits, the upper sections of which are twisted oppositely and the lower sections in the same relative direction, for the purpose described.

4. The combination, with a machine for the manufacture of nails, of the feed-conduits, the upper sections of which are twisted quarterly in opposite, directions and the lower sections of which are twisted quarterly in the same relative direction, substantially as shown and described.

5. The combination, in a machine for the manufacture of nails, of two pairs of rolls with the upper and intermediate conduit-sections, the upper section having a helical twist and being adapted to feed the blanks edgewise to the first pair of rolls, and the intermediate section, having a like helical twist and being adapted to present the blanks flatwise to the second pair of rolls, substantially as described. 6. The combination, in a machine for the manufacture of nails, of two pairs of formingrolls with the upper andintermediate conduitsections, the upper section being adapted to feed the blanks to the first pair of rolls, and the intermediate section having a helical twistand being adapted to feed the blanks to the second pair of rollsand to present them thereto at right angles to the position in which they were presented to the first pair of rolls, substantially as described. In testimony whereof I affix my signaturein presence of two witnesses.

JOHN A. COLEMAN.

\Vitnesses:

\VILLIAM l). ALEXANDER, H. A. COHNAN.