US591621A - Hampton - Google Patents

Description

(No'Model.-) G-Shets-S-heet 1, E. A. DAVIES & S. T. THOMAS. APPARATUS FOR REMOVING SGALE FROM SHEET METAL.

Patented 001;. 12,1897.

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(No Model.) fi-sheetssheet 2. E. A. DAVIES & S. T. THOMAS. APPARATUS FOR REMOVING SCALE FROM SHEET METAL.

No. 591,621. Patented Oct. 12, 189.7.

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E. A. DAVIES St S. T. THOMAS. APPARATUS FOR REMOVING SCALE FRDM SHEET METAL.

N0. 591,621. Patented Oct. 12,1897.

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E. A. DAVIES & S. T. THOMAS. APPARATUS FOR REMOVING SCALE PROM SHEET METAL.

No. 591,621. Patented Oct. 12,1897.

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APPARATUS FOR REMOVING SCALE FRQM SHEET METAL.

No. 591,621. Patented Oct. 12,1897.

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Patented Oct. 12,1897.

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UNITED STATES PATENT OFFICE.

EDTVARD ALBERT DAVIES AND STEPHEN THORPE THOMAS, OF WOLVER- HAMPTON, ENGLAND, ASSIGNORS TO DAVIES BROTHERS & 00., LIMITED, OF SAME PLACE.

APPARATUS FOR REMOVING SCALE FROM SHEET METAL.

SPECIFICATION forming part of Letters Patent No. 591,621, dated October 12, 1897.

Application filed May 19, 1897. Serial No. 637,182. (No model.)

To all whom it may concern: nace, taken on line c of Fig. 1. Fig. 4eis a Be it known that we, EDWARD ALBERT section, to an enlarged scale, of one of the DAVIES and STEPHEN THORPE THOMAS, subsprocket-wheels used with the endless chains jects of the Queen of Great Britain, residing which pass through the furnace, and shows 5 at \Volverhampton, in the county of Stafford, also a side elevation of a portion of one of the England,have invented certain new andusechains. Fig. 5 is a plan of the wheel and ful Improvements in Apparatus for Use in length of chain shown by Fig. 4. Fig. 6 illus- Removing-Scale which has been Raised on the trates, in plan view, also to an enlarged scale, Surfaces of Metal Sheets, of which the followapparatus constructed according to this inro ing is a specification. vention for the purpose of removing scale This invention has for its object improvefrom the surfaces of metal sheets which has ments in apparatus for use in detaching from been previously raised thereupon in a suitthe surfaces of metal sheets-such, forinable furnace. Fig. 7 is alongitudinal section stance, as those which are intended to be galtaken on line woc of Fig. 6. Fig. 8 is a plan 15 vanized or otherwise coated with metal or view of a modified form of the apparatus for metallic alloy-scale which has been raised detaching the scale from metal sheets. Fig. thereupon in any suitable scaling-furnace, 9 is a longitudinal section taken online y y and more especially the employment of such of Fig. 8. Fig. 10 is a detached section, to apparatus with a scaling-furnace such as an enlarged scale, of the frame carrying the 20 that hereinafter described, through which the heaters which are used in the modification sheets are carried by means of endless chains. shown by Figs. 8 and 9. Fig. 11 is a side The scale is detached from the surfaces of elevation of a short length of such frame. the sheets, according to this invention, by Referring first to Figs. 1 to 5, the furnace means of apparatus which comprises a numillustrated by such views is formed with a 25 her of beaters, which as a sheet is traveling heating-chamber A for the sheets. This along with the under surface supported upon chamber is of a width to suitthe maximum a plate orbacking strike the upper surface width of the sheets which are to be scaled thereof with great rapidity in such manner therein and is of a length which is considerthat nearly every portion of the upper surable compared with its width, being conven 3o face of the sheet receives a sharp blow on its iently about thirty to thirty-five feet in length passage through the appliance. The scale is between the doors. Each end of the chamber thus thoroughly loosened and detached from A is normally closed by means of a door B, both surfaces of the sheet. Each sheet is capable of being raised .in vertical guides in drawn into the apparatus by means of'a pair the usual manner of raising similar doors, so 3 5 of feed-rolls and passes away therefrom as to completely open the ends. These doors,

through a pair of withdrawing-rolls, the blows however, when closed do not completely close being struck upon the upper surface of the the ends of the chamber A, but leave a space sheet by a number of beaters arranged in poat each end between the floor of the chamber sition to strike upon the portion of the sheet A and the lower edge of the corresponding 0 which is passing the two pairs of rolls. 'door through which the sheets are carried. 0

Figure 1 is a longitudinal section through The doors B do not appear in Fig. 2, as the a furnace such as it is preferred to use for section of such view is taken at a level imraising thescale upon the surfaces of the mediately below the bottomsof the doors. sheets, and shows also the appliances by Endless chains a pass around wheels I), which 45 means of which the sheets are carried autoare in position some distance from the feed- 5 matically into, through, and out from the furing-in end of the furnace, and around nace. Fig. 2-is a sectional plan of the fursprocket-wheels c, which are in position a nace, and shows also, in plan view, the apshort distance beyond the delivering end of pliances for carrying the sheets therethrough. the furnace, and these chains pass through 50 Fig. 3 is a transverse section through the furthe chamber A of the furnace and run upon I00 plates (Z upon the bottom of the chamber. The under sides of the chains run along metal channels 6, which pass alsov through a hollow space 0, formed underneath the chamber A of the furnace. The spindle carrying the sprocketwheel c is driven continuously from any suitable source of power, and the links of the chains are caused to move constantly through the chamber A in the direction of the arrow f, Fig. 1. Each pair of side links of the endless chains 11 are formed with projections a, (see Figs. at and 5,) upon which the sheets are placed for being carried into and through the chamber A by the movement of the endless chains; The portions of the endless chains a which are at any time passing from the wheels b toward the furnace are carried by rollers g, which are capable of rotating in bearings supported by longitudinal bearers h. The chains may be tightened from time to time, as the joints thereof wear, by screw-tightening devices 1', which; draw back along guides on their supporting-bed the bearings which support the spindle j, carrying the wheels b. Furnace-grates Dare-arranged along one side of' the heating-chamber A and are provided with suitable joining doors k. The products of combustion from the furnace-grates D pass over the top of a wall Z, which divides them. from the heatingchamber A, and thence into the heatingchamber, and pass away from such chamber through flues m at the bottom. of the wall on the opposite side of such chamber, andthence into a flue E, running along the side of the chamber, and thence through a fine F to the chimney. The chamber is maintained at a temperature which causes the sheets to be heated to a bright-red heat, and the scaleis thus raised on the surfaces of the sheets in a manner which adapts it to be readily removed by the apparatus hereinafter described. The

doors B are normally down while the sheets are being carried into, through, and out from the heating-chamberA, and are required only for obtaining access to the interior of the chamber for the purpose of repairs or incase of a sheet getting-out of place during; its passage therethrough.

Referring now to the apparatus shown by Figs. 6 and 7, n n are a pair of feeding-in rolls mounted in suitable hearings in. the fixed framing G of the apparatus, and ooare a pair of corresponding withdrawing-rolls. p is. afi'xed supporting-plate along which the sheets pass between the rolls n n and the rolls 0 0.v q are a number of heaters, each formed conveniently of a flat section of bar shaped longitudinally, as shown. The heaters are pivoted at their hinder ends to a round transverse bar '1', which is fixed at each end. to the framing of the machine. The heaters are arranged, as seen on plan, as near together side by side as will admit of their movement independently of one another and are kept apart the required distance by washers 8 around the bar 1', and as an additional precaution are guided at their forward ends by guides 8', carried by a transverse bar 8 The heaters are formed so that when down upon the sheet, as shown by full lines, Fig. 7, a considerable length of straight flat portion bears upon the surface of a sheet. The hinder 5 end of each beater is bent up conveniently of a curved form to its pivot attachment with the bar 0" and is bent up at its forward end and terminates at such end in a short length of horizontal or horizontally-inclined portion t. H is a frame rigidly mounted upon a spindle in, which is capable of rotation in bearings carried by the framing of the machine. This frame consists, conveniently, of parts 12, which are of the shape of band-pul- 'leys and which are keyed upon the spindle u, land of longitudinal bars w, of angle-section, lwhich are fixed at. intervals apart to the rims of the pulleys. As the frame is caused to rotateinthe direction of the arrow a, Fig; 7, ithe angle-bars w operate in succession to lift the forward ends of the heaters each into the position indicated by broken lines, Fig. 7, and in passing out of contact with, such ends allow the heaters todrop upon a sheet whichis passing between the feeding in and with- ;drawing rolls. The sheet is caused to travel along the plate p at a velocity of about twenty to make about one hundred rotations per iminute, and thus each beater of the row: of beaters strikes a number of blows in rapid succession upon: the surface of the sheet with the result that the scale is dislodged from every part of the surface of the sheet. The action of the heaters upon the one side of the f; sheet. dislod'ges the scale not only from such 1' side, but from the other side also, and renders it, unnecessaryto pass the sheets a. secendtime'through the apparatus.

- The apparatus shown by Figs. 6 and 7 may ;be employed for treating sheets on the sur- 1 face of which the scale has been. raised in any F suitable scaling-furnace, but it is preferred (and this. is the more immediate purpose of the apparatus)- to use such apparatus with a scaling-furnace such. as that described with '1 reference to Figs. 1, 2, and 3. The line b, Figs. 6 and 7, indicates the end of the furnace throughv which the sheets pass out to the apparatus for detaching the scale, and the sprocket-wheels 0 correspond to the wheels 0 shown by Figs. 1 and 2. The chains which earry the sheets through the furnace of course travel at the same speed as the surface velocity of the rolls n. n and 0 0. The ;sheets are delivered by the endless chains onto guides c and between the rolls n n. The f forward ends of the sheets are guided between the rolls n n by means of the guides c and a f slanting plate d'. The pairs of rolls n nand In Fig. 6' the pair 0- 0 are shown to be driven by means of a, chain from one of the rolls n,

-' the medium of a shaft e, from which the 5 0 0 may be driven in any convenient manner.

feet per minute, and the frame H is caused and the'rolls n are-shown to be driven through sprocket-wheels c are also driven. The shaft 6 is provided with fast and loose pulleys f, so that it may be readily stopped and started, and a hand-wheel g is fixed upon one end of such shaft, so that it may be turned back by hand to reverse the rolls n n in case a sheet enters improperly between the rolls. The spindle to, carrying the rotating frame H, is driven independently of the rolls n n and 0 0, so that it may be caused to rotate only while a sheet is passing beneath the heaters, and the unnecessary wear and tear be thus avoided which would result from allowing the heaters to strike upon the backing-plate 19 all the time that the rolls were rotating while a sheet was not passing beneath the heaters. As the work comes somewhat suddenly upon the r0- tating frame each time the set of heaters is raised, it is preferred to drive such frame through the medium of a pinion h on the hand-pulley shaft and a wheel 1" on the spindle of the rotating frame rather than to drive with a band passing around a pulley fixed upon the spindle of the rotating frame. The portions k k of the rolls which are between the ends of the operative surfaces thereof and the necks are reduced somewhat in diameter to prevent scale from the sheets creeping along the rolls into the necks. Two or more sets of heaters may be employed in the treatment, as above described of each sheet upon which the scale has been raised in the special form of scaling-furnace above described or other scaling-furnace, but such will not be found necessary.

The apparatusshown by Figs. 8 to 11 differs from that already described with reference to Figs. 6 and 7 only in respect of the heaters and the method of mounting and operating them. In this case a number of wings or beaters Z, each formed conveniently of a flat sect-ion of steel curved somewhat longitudinally, as shown, are hinged or pivoted to the rotating frame H. The heaters are convenientl y arranged in rows lengthwise of the frame, the heaters of one row being placed, preferably, to break joint with those of the adjacent row on each side, as clearly shown by Figs. 8 and 11. The frame H, carrying the heaters, is driven to rotate in the direction indicated by the arrow m, Fig. 9, and the heaters are hinged to the frame in such manner that. as the frame rotates they fly out and strike with considerable force upon the surface of a sheet which is passing between the rolls n n and rolls 0 0. The heater lettered Z of Fig. 10 is shown to be in position in which it would be when upon the surface 4) of the rotating frame.

of a sheet passing between the pairs of rolls. After a beater has struck the sheet it is dragged forward thereupon until it is lifted clear again by the rotation of the frame H. The heaters are curved outwardly, as shown, so that their convex surfaces strike upon the surface of a sheet, andthe purpose of forming them of a curved shape longitudinally is to prevent their outer ends striking and indenting the sheet. Plain longitudinal bars 72 are fixed parallel to the spindle u at equal distances apart around the rims of the parts The heaters Z[ are pivoted to lugs 0, which are fixed to the bars 1t. Bars 19, also running parallel with the axis of the spindle u, are fixed to the rims of the parts i; for the purpose of preventing any heaters which are at the upper side of the rotating frame, when such frame is at rest or moving slowly, from falling too much inward. As in this modification the work of the rotatin g frame is tolerably regular, such frame may be driven by means of a hand passing around a pulley on the spindle of such frame.

What we claim as our invention, and desire to secure by Letters Patent, is

1. Apparatus for use in detaching, from the surfaces of metal sheets, scale which has been raised thereupon in a suitable furnace, which comprises a backing orsupport for the sheets, means for traversing the sheets along the hacking or support, heaters arranged in po-' sition over the hacking or support, and mechanism for operating the heaters, all substantially as described and shown.

2; Apparatus for use in detaching, from the surfaces of metal sheets, scale which has been raised thereupon in a suitable furnace, which comprises a backing-plate or support for the sheets, a pair of feeding-inrolls, a pair of withd rawing-rolls, heaters arranged over the backing-plate or support, and a rotating appliance for operatingthe heaters, all substantially as described and shown.

3. The combination of the backing-plate or support 19, feeding-in rolls n n, withdrawingrolls 0 0, heaters q, rotating frame H having lifters w, substantially as described and shown, for the purpose set forth.

In witness whereof we have hereunto signed our names in the presence of two subscribing witnesses.

Witnesses: I

ARCHER B. SMITH, THOMAS DALLARD.

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