US89528A - Improved machine for making screws - Google Patents

Description

A. WEB$TER.

MACHINE FOR MAKING SCREWS.

No 89,528. PatentedApr. 27, 1869.

* tluitxl ALLEN WEBSTER, OF FARMINGTON, .ASSIGNOR TO HIMSELF AND N. C. HUB BELL, OF NEW HAVEN, CONNECTICUT. Letters Patent No. 89,528, dated April 27, 1869.

mnovznn moms ron MAKING scnnws.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it known that I, ALLEN WEBSTER, of Farmington, in the county of Hartford, and State'of Connecticut, have invented a new Improvement in Machine for Making Screws; and I do hereby declare the following, when taken in connection with the accompanying drawings, and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawingsmonstitute part of this specification, and represent inriage supporting in bearings O, a carrier-wheel G, and

is moved back and forth by means of a lever D, and to the shaft of the wheel 0', a gear 0 is fixed, which,

' as the carriage is moved forward, passes over a rack D, and causes a partial revolution of the wheel 0', but as the carriage returns the gear 0 passes over the rack without turning the wheel 0', that is, the gear 0 turns on the shaft, the shaft being held by a pawl and ratchet d.

In bearings E E is arranged a hollow mandrel E, through which the wire from which the screw is to be made is passed, asseen in fig. 3, and in the wheel 0', a milling-tool a is arranged so that as the wheel 0 is moved up by the carriage B, the milling-tool a will cut away the end of the wire, the wire being rapidly revolved by the mandrel E until the required length for the body of the screw is cut, as seen in fig. 3, then a cutter f is advanced and cuts into the. wire at a proper distance from the shoulder to form the head and so as to nearly separate the blank from the wire as seen in fig. 1.

The carriage during this operation is withdrawn and again advanced, presenting a die 11., which cuts the thread upon the revolving wire, and the cdnnection between the blank and wire is sufficient to hold the blank for this operation, but so soon as the die h strikes the shoulder of the head it will break the blank from the wire. The next movement of the carriage turns the wheel 0', and presents another cutter to form the second blank,'while the first is turned down to the position at --i, fig. 4; then as the wheel 0 is again drawn back, the

screw passes ver a cutter and nicking-wheel G beneath the machine, which nicks the head and at the same 1 time dresses its surface, the wheel being formed as seen in fig. 7, which completes the screw.

At the next movement of the carrier the'finished screw is turned up to the position seen at n, fig. 4, and

in its movement up to this point it passes on to a screwdriver m supported on the carriage B in bearings 17,-:

when the carriage is drawn back a revolving mandrel L connects with the spindle of the screw-driver m, as

seen in fig. 5 enlarged, which turns the screw from its. die when the screw'drops from the machine complete.

After having thus turned the screw from its die it is necessary that the screw-driver should return again at the. same point to receive the screw. For this purpose I arrange upon the screw-driver spindle a toothed wheel P, seen in figs. 5 and 6, and below that a larger toothed wheel It, and on the spindle or wheel P I form a notch or projection s, and hanga pawl S,

and on the wheel R I form a cam t. so that when the said cam strikes the pawl Sit will raise the said pawl" and cause it to strike into or against the projection or" notch s on the wheel-If. the number of teeth of the. 'said wheels being proportioned so that any number of" given revolutions of the small wheels may be made before the cam onthe one and notch or projection on the other wouldact in conjunction and thus arrest the movement. 1 v

Iari'ange upon the shaft of the wheel R a spring. or weight whichis wound up by the revolution of the screw-driver withdrawing the screw; therefore when the screw has been withdrawn. and the screw-driver spindle released from its connection with the mandrel- L, the-spring or weight acting upon the wheel R will cause the screw-driver to return until the notch and cam are again in conjunction as in fig. 6, which is the condition of the rest to receive the screws.

Instead of the screws it will be readily seen that pillars for clock-movements may be formed in the same manner by passing the wire from which the pillars are to be made through the mandrel E.

Having thus fully described my invention,

What I claim as new and useful, and desire to secure by Letters Patent, is---' .1. The reciprocating and rotating carrier-wheel 0, provided with the milling-tool a, and threadingsdie h,.combine d with themandrel E, for revolving the wire, and the cutter f, operatingas and for the purpose specified.

2. In combination with the subject-matter ,of the first clause of claim, the nicking and milling-tool G, operating as and for the purpose set forth.

3. In combination with the subject-matter of the first and second clauses of claim, the screw-driver m arranged so as to operate as and ,for the purpose specified.

4. The combination-of the wheels P and R, stops L and s, with the pawl S, so as to operate as and for the ur ass set forth.

p p ALLEN WEBSTER. Witnesses:

A. J. Tmmms, J. H. SHUMWAY.

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