US717068A - Manufacture of black plates or sheets. - Google Patents

Description

No. 70,068. Patented Dec. 30, I902.

' C. W. BRAY.

MANUFACTURE OF BLACK PLATES 0B SHEETS.

Rehewed Oct. 2, 1902.

(Application filed Feb. 25, 1901.

(No Model.)

INVENTOR Q WITH 1': Nonms PETERS co. PNOYD-UTHQ. wnsnmaron. u. c.

UNITED ST TES CHARLES VJ. BRAY, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO THE AMERICAN TIN PLATE COMPANY, OF ORANGE, NEW JERSEY, A COR- PORATION OF NETV JERSEY.

MANUFACTURE OF BLACK PLATES OR SHEETS.

SPECIFICATION forming part of Letters Patent No. 717,068, dated December 30, 1902.

Application filed February 25, 1901. Renewed October 2, 1902. Serial No. 125,721. (No model.)

To all 2072,0117, it may concern:

Be it known that I, CHARLES W. BRAY, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in the Manufacture of Black Plates or Sheets, of which the following is a full, clear, and exact description, reference being had to the accompanyingdrawings, forming part of this specification, in which- Figure 1 is a diagrammatic top plan view of my improved system,.and Figs. 2 and 3 are diagrammatic views showing the connections for driving the finishing-rolls in opposite directions.

My invention relates to the production of black plates and sheets, and is designed to reduce the number of heatings necessary, as well as the number of separate rolling operations.

Heretofore in the manufacture of black sheets four heatings and four difierent rolling operations were required in reducing the sheet-bar to the desired gage. By the use of my invention only two heatings are required and two rolling operations, and the output may be greatly increased with less labor and expense than is now employed.

Referring to the drawings, in which I show one form of apparatus for carrying out my invention, 2 represents a continuous heatingfurnace, which may be of any usual type, having ahydraulic feeding device 3 at its entering or rear end. A positively-driven feedtable 4: extends from the other end of this furnace to a continuous roughing-mill. I have shown this mill as containing eight stands of plain two-high rolls, and feed-tables may or may not be used between the various rolls of this mill, as desired. The rolls may be driven in sets, as shown, by gear connections 5, with engines 6 6, though the number of sets of rolls in the mill, as well as the manner of driving them, may be widely varied without departing from my invention. The sheet-bar emerging from the last roll of this mill is fed upon a roller-table or other support 7, on which it may be fed sidewise by a hydraulic pusher 8 or other suitable mechanism.

Along one side of the feed-table extends a rotary shear having a number of shearingdisks, according to the number of plates into which it is desired to cut the sheet-bar, and between the shears and table I preferably use a pair of driven feed-rollers 9, which feed the pair of two-high reversing-rolls 13. The heated plates may be fed into the mills on opposite sides by chain-tables 14c or other suitable feed devices, and from these finishing-mills the packs may be taken to the squaringshears 15.

I have shown the several finishing-mills as driven from a common shaft 16, actuated by engine 17, and the reversing is carried out, preferably, by the means of clutch devices in the following manner: At one side of each finishing-mill the shaft 16 is provided with a pair of pinions 18 and 19. One oftthese pinions 18 intermeshes with a toothed Wheel 20, which rotates loosely upon the driving-shaft 21, having the usual wabbler connection with the lower roll of the mill. The other pinion 19 engages an idler-pinion 22, which in turn engages a toothed wheel 23, which also is loosely mounted upon the driving-shaft 21.

be reversed at the will of the operator.

In making black sheets or plates with my improved mill I may use the same sheet-bars now employed, and these bars may be sheared to a slightly-greater-width than that of the These bars are charged sheets to be made.

The mills may thus length for convenient handling in the following operations. I have shown the shears as arranged for cutting the bar in four sections, the outer two of the five shear-disks being used to trim the ends of the sheet-bar. The sections thus cut crosswise of the bar are then distributed to the different furnaces along the conveyer, and having been piled up in packs of from four to twelve, according to the desired gage, these packs are heated in the furnaces and then rolled crosswise in packs in the finishing-mills to the necessary lengthto give the desired gage. The longer axis of the pack is parallel with the axes of the rolls when the pack is fed in. The packs may then be taken to the squaring-shears.

The advantages of my invention result from the great saving in laborandthe increase in the output of the mill. One roughing-mill is preferably used to supply a number of finishing-mills, so that all the mills may be kept in operation. An important advantage flows from the cutting of the partially-rolled bars crosswise into separate sections. This gives sections of a convenient length for handling, and when these bars are piled they are preferably fed into the finishing-rolls in the direction of their width-that is, with their longitudinal axis parallel with the rolls. I

Many variations may be made in the form and arrangement of the roughing-mill, the finishing -'mill, the conveyers, and furnaces Without dparting from my invention, since I consider myself the first to partially roll the bars, divide them transversely into sepaate pieces, and then reheat and pile these pieces, and then roll the packs.

I claim- 1. In apparatus for manufacturing black plates or sheets, a continuous mill comprising a series of sets of roughing-rolls arranged in tandem, mechanism at the end of the roughing-rolls arranged to move the bar at an angle to its path through the rolls, shear mechanism arranged to sever the bar transversely during its movement, and mechanism for transferring the severed sections to a finishing-mill; substantially as described.

2. In apparatus for manufacturing black plates or sheets,'a continuous mill comprising a series of sets of roughing-rolls arranged in tandem, mechanism at the end of the roughing-rolls arranged to move the bar at'an angle to its path through the rolls, shear mechanism arranged to sever the bar transversely during its movement, and a conveyer leading from the shears to a finishing-mill; substantially as described.

In testimony whereof I have hereunto set my hand.

O. W. BRAY. Witnesses:

H. M. CoRWIN, GEo. B. BLEMING.

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