USRE7153E - Improvement in machines for tapping screw-nuts - Google Patents

Description

s. L. Wenns?. MACHINES FO'R TAPPING SCREW-NUTS.

rm: Nonms PE1-Ens co. pHoro-mno.,

UNITED STATES PATENT OFFICE.

SAMUEL L. WORSLEY, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO AMERICAN SCREW COMPANY.

IMPROVEMENT IN.MACHlNES FOR TAPPNGI` SCREW-NUTS.

Specification forming part of Letters Patent No. 166,490, dated August 1U, 1875; vreissue No. 7,153, dated May 30, 1876 application filed March 15, 1876.

To all whom 'it may concern Be it known that I, SAMUEL L. WoRsLEY,

of the 'city and county of Providence, in t-he l State of lthode Island, have invented certain new and usef'ul Improvements in Machines for Tapping Nuts; and I do hereby declare that the following specification, taken in connection with the drawings making a part of the same, is a full, clear, and exact 'description thereof.

the subjects to which my improvements relate.

In the drawings, A represents the bed ot the machine. vB is the driving-shaft, to which the power is applied. The driving-shaft oarries a bevel-gear, G, which, engaging with a fellowr gear, D, gives motion to a transverse shaft, upon the other end of which is a bevel-gear, E, Fig. 2, whichengages with two bevel-pinions, F F, fitted to constantly revolve in opposite directions around Ythe shaft G. This latter shaft carries the threadeutting tap a, and it is arranged so as to be capable of an endwise movement inits bearings and through the pinions F F', for the purpose of enabling the tap to be brought up to and pass through the nut-blank to be threaded, and to move back to allow of the presentation ofa new blank. The driving-shaft B also carries a worm-wheel, H, Fig. l, which engages with a worm-gear, H', and gives motion to a transverse shaft, J, underneath the platform of the bed A, Fig. 2. This shaft, through the bevelgears J1 J, Fig. 2, gives motion to the shaft K, and to the cam K keyed thereto. The revolvin cam K ives a vibrator movement to a shipper-bar, L, and this latter, engaging revolved in' one direction wben the clutch M is engaged with the pinion F, and in the opposite'direction when it is engaged with the pinion F.

The feeding device shown in the drawings is that which is familiar tocon'structers of screw machinery as the Sloan feed.7 The means bywhieh this feed is adapted to supply lnuts to the machine rinstead of screwblanks is one of the features of the present in- Veution.

As in the case when screw-blanks are to be fed, the nut-blanks are placed in a mass in the dish M, which is made to revolve in a horizontal plane by nieans of the bevel-gears b c, deriving motion from the shaft K, communicated by the belt d and pulleys c f. The sep@ arator N has an alternately upward and downward movement in a vertical plane imparted to it by means of the lifter-rod g, operated by a cam-toe on the revolving shaft h, and the arm i, attached at one end to the lifter-rod and at the other end to a crank-arm, 7c, on a shaft, to which the separator is keyed in a manner well understood.

In order to adapt the separator for use in selecting nut-blanks instead of screw-blanks from a mass, the end of the separator which is dipped into the mass of blanks in the revolving dish is made shovel-shaped, as seen at m, Fig. l. A mortise, n, is also cut through the blade of the shovel, large-enough to allow a blank, which is taken up edgewise, to fall through it. In combination also withthe end of the separator as thus constructed, is a guard, o, having two vertical sides and a back piece, while the bottom of theseparator is excavated, so as to make a flaring groove to guide the blanks to the railway-guide in the separator, along which latter itis intended the blanks shall slide when theA shovel end of the separator is elevated, and be conducted the tap.

into= the similar coinciding-guide in the sta? tionary stackv O.

` ,For the purpose of preventing the blanks from shooting ont of the open end of the rail# way-guide in the separator while the rear end of the latter isti ping downwardto' make connection with the tack, a springycheck, p, is'conlbin'ed with the separator, and which is raised toallow the passage ofblanks when the two sections ofthe railway-guide are in alignment, as shown at Fig.' 2. The stack Ofis mounted on the top of a holder, O', for the nut, while it is being threaded. This holderhas an opening through it, communieating with the passage-way through 4the stack, as'seen in section at Fig. 3, and is, in fact, acontinuation ofithe stack, but is .constructed oi'suticient strength to enableitto resist the twisting strains incident to the workingof the tap incutting the thread 'in the 11u s.

The next feature of my invention consists of the means by which the finished nuts are discharged one by one. The devices to --accomplish this are operated by the threadingtap itself, so that itis certain'that only blanks which have been entered. by the threadingtap will be discharged.

This mode of operation of the machine renders it unnecessary to inspect each nut, as would be required in case the operation of the discharger was not madedependent upon The whole column of blanks and one linished nut at the bottom of the column are supported, when the 'tap is not in action., by a check bar or plate, q, Fig. 3. This check-bar is attached to one end of a rod, r,

' fitted to slide in a holethrough th'eheadblockV l), to which thel holder 0 is fastened, and in rearof the holder. The otherend of the said rod 1s pivoted to the arm s of -a bell-crank mounted on a post-standard,s1. .The other arm, s2, ofthe bell-crank is connected, by means of a coiled spring, t, with a staple vset in the side ofthe head-block P.l To the arm s* a rod', u, is pivoted. This rod enters the head-'block P, and extends up to the column of 11nt-blanks.in the holder, Fig. 2, and its .axis should be coincident with the axis of the tap. The next blank which is to be threaded, o, Fig. 3, rests upon the blank which was last threaded, w, and this latter is supportedby the check-rod q, the distance between the check and the under side o f the blank o being jn'st equal to the width ota blank.

^ 1t is obvious that with this construction of `previol isly-tl 1'1eaded blank w when this drops Ifrom the machine.V The column of blanks is, at this time, supported bythe nut '0, through which the tap a is inserted. As the tap unscrews itself from the nnte ythe spring t acts to restore the checkmod to its former positiom' and when the tap is clear of the now finished nut th-e latter falls into .the holder a distance vequal toits width, and is followed by the col- -nmn of blanks above it. J All the above-described operations are now repeated.

The drawings also show a combination of devices whereby. the threading-tap can be brought up to the nut-blank to commence the',

threading operation under a yielding pressure.

The, combination which' contains this fea# ture, although of my invention, is not claimed in this patent, but is made the'subject of claim in another application for Letters Patent, filed 'i by me September 16, 1875', for improvements in machines for'threadiug screws, .for the reason that such invention was made in connection' withvsuch last-named machine at anearlier.

date than the date of the invention described,

in this patent.

ent is- LThe combination of the revel vingldish.` M", for vcon taining nut-blanks in afm'ass,='and the vibrating separator N, when the' latter is constructed with a shovel end, fm, a rnortise, n, and guard o, substantially as 'describcjd 2. The combination of the vibratiugQmbt'-,

tised separator N" with a stationary: receiw. Vingstack and a spring-check, lsubstantially as described. v

3.The combination of the threading-tap c with the devices, substantially as described, for discharging the nuts one by one.

4. The combination and arrangement of the 'threading-tap a with the stack 0 and holder O', for'the nut-blanks, whereby the said tap,

while threading the blau-k Ain the, column ot" blanks4 next above thela'stthreaded.blank,` shall `support thewhole column of blanks' above the tap while the underlying nut is be- 'ing discharged, substantially "as specified.

SAML L. WORSLEY. Witnesses:

J. G. B. Weens, GEORGE FULLER.

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