US439986A

US439986A - Lead-press

Info

Publication number: US439986A
Authority: US
Publication date: 1890-11-04
Anticipated expiration: 1907-11-04

Description

(Np Model.)

0.0,TRAO'Y. LEAD PRESS.

1%. 439,986. 4 Patented Nov. 4, 1890.

UNITED "STATES PATENT OFFICE.

cnRIsTornER o. 'TRAcY. or BROOKLYN, NEW YORK.

LEAD-PRESS.

SPECIFICATION forming part of Letters Patent No. 439,986, dated November 4,1890.

Application filed July 11, 1890. Serial No. 358,364. (Fo niodeL) V IToaZZ whom it maycoizcern:

Be it known that I, CHRISTOPHER G. TRACY, ofBrooklyn, in the county of Kings and State of New York, have invented new and Improved Dies for"Lead-Pr,esses, of which the following is a full, cleaigand exact description.

I -This inventionrelates to certain improvementsin my new lead-press die covered by my patent numbered 431,295, granted to me July 1, 1890; and the invention consists, principally, in such construction of the press that two dies ,m-ay be'used at the same time, thu

doubling the lca'pacity of the press.

The invent on construction of the die, all as hereinafter-described and claimed.

' Reference is to be had to the accompanying ,3 4;.IS a broken plan view of the same.

drawings, forming a part of this specification, in whichsimilar letters of reference indicate corresponding parts in all thefigures.

Figure 1 is a plan View of the die-blocks and dies fitted thereon. Fig.2 is a sectional elevation of the same on theline a: a: of Fig. 1', showing portions of=a common press. Fig. 3 is a sectional view of one of the dies. Fig. Figs. 5.

' and 6 are perspective views of the core and core-holder, respectively. Fig. 7 shows a modified form of the core, and Fig. 8 shows a modified form of the tip.

A B represent the die-blocks placed between the piston C of the press and the hollow top block D, which contains thelead E and receives the mandrel F in' the operation of the press.

block 13 are formed two seatsB' B to receive the two dies G e. The block A is formed with a cavity A which coincides with the cavity or lead-reservoir D of the top block- D, so that the lead has a free passage from the reservoir to thetops of the dies. Between lead products the dies I placeadivision-plate II with a sharpened edge to divide the lead, so that an equal portion will be directed to each die.

- The dies G G are at :right angles to the direction of movement of the press. By the employment of two dies, as described,,two

may belnade at a single operation,'thus doubling the capacity of the press also consists inthe special Inthe upper surface of the The dies may be of any appropriate construction; but I prefer to use specially-constructed dies, which I will now describe. These dies are for making lead pipeor traps,

commonly known as S-traps, or by the use of hollow cores J (shown in Fig. 7,) I may cover wire or wire cable or other material with lead. The dies are duplicates of each other, each comprising a casing a, core-holder b, and'core 0. Each casing a is formed with ports a a and provided at the end with a die tip 00*, which gages the external 7 form of the product, while the size of the core prescribes the size and form of theinterior of the product. The opposite end of each casing is closed by a screw-plug a to hold the core-holder and core in place. The coreholder 11 of the die is hollow to receive the core, and at the front end ,is formed with the'wedge-shaped projections b b, which reach past the ports (U, as shown clearly in Figs. 3. and 4. These projections b serve to confine at each side of the die the lead directed to that side through'its port a, and it will be observed that the projections terminate at their front ends only a slight distance from the inner end of the die-cap a. Thus the lead passing to the cap a from each side of the die will meet just before entering the cap a and hence will be caused to thoroughly unite; whereas it might not so unite if prevented from meeting until entering the cap 0. A further result ofthe projections b, orrather the lowermost one, is to prevent the formation,or rather retention, of .deadlead -that is, lead banked up at the bottom of the dieby reason of the shoulder formed by the inner end of the cap a? or its equivalent outlet. The lower projection b therefore, or any equivalent ,projection,either carried by the core, core-holder, or the case a,

occupies the space at the bottom of the die each side of each die Gth ough the ports a by turning the saidliliesi'bynieans,ot the toothed segment K'and worm Kf. v y In operation, to make an S-trap or other curved product the dies will be set with the",

bridge or division-piece H central, so that the flow of lead will be equalon both sides. i'Thi's produces a straight tube; When this has proneeded a proper distance, the die is turnedto the right, which diminishes the flow of lead the left-hand port. This oversupply of lead curve will be larger than if the die be turned in the right-hand port and increases it in causes the product issuing from thedie to turn to .the left, producing a perfectly true curve, and the thickness of lead will be uniform. a When. the .left curve'of the product has reached} a sufficient length, the die will be.

turned to the right, which will reverse the curve and produce a product in the form of' an S. The radii of the curveswill be-more or less, according-to the suddenness of the turning of the die. If it be turned.slowly,=the

1 tip is of the shape of the strip to be covered.

The strip is then passed through the coreholder and the said-tip and the press are put in operation, whereupon the lead will be ap plied firmly to the metal strip, the thickness of the lead covering being determined'by the size of the aperture in the tip.

The object of making the core and 'coreholder separable is to enable the cores to .be changed without changing the core-l1older but this feature is not absolutely necessary, and is present only with a View to economy.

I do not herein claim, broadly, a plurality of dies in presses of this character, as I am toward'the outlet of .t

aware of two or more dies'divided by a movable dividing-gate at the entrance; but in such presses, besides the diflicnlty of operating the gate inthe presence of thepressure of lead,

the gate falls short of satisfactory results, owing to the absence of individual controlof v the lead directed to each die. 7

Having thus described my invention, I claim as new and desire to secure by Letters Patent- I 1; The combination, with a die-block hav- .ing two seats an'da'division-plate separating said'seats, ofrotary dies having two inlets for the material, substantially as described.

' 2. The herein-described die, comprising a case or hollow' body having a contracted out- .let for the lead and hearings, projectiona't the inner endof said ontletfor preventing banking of the lead-substantially as-described.

. 3. The herein-described dies, consisting of a hollow body or case having a contracted outlet, and having projections therein maintaining a division of the die and extending he same, substantially as described. v I

4. The die-block'for-med with two seats, in combination with two dies fitted in said seats, and the wormsK and segments K for turning'the said dies, substantially as described.

5. The the G, formed with lead-portsa', in

combination with the core and the core-holder formed with the, projections b, substantially as described. j

(3. The die comprising the-casing, the coreholder, and the tip, in combination with the core,- the ports a a, and the projections b, substantially as described.

7. The die-casing having the ports a. a,

die-tip a and plug (L in combination with the die core-holder b, and a core fitted in said core-holder, substantially as described.

CHRISTOPHER C. TRACY.

.Vitnesses: Y

1-1. A, Wnsr,

M. CLARK.