US408832A

US408832A - eyans

Info

Publication number: US408832A
Authority: US
Publication date: 1889-08-13
Anticipated expiration: 1906-08-13

Description

(No Model.) s Sheets-Sheet 1. D. EVANS. MACHINE FDR TINNING COPPER SHEETS.

No. 408,832. Patented Aug. 13, 1889.

3 Sheets-Sheet 2.

(No Model.) D. EVANS. MACHINE FOR TINNING COPPER SHEETS. No. 408,832. Patented Aug. 13, 1889.

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(No Model.) 3 Sheets-Sheet 3. D. EVANS.

MACHINE FOR TINNINGv COPPER SHEETS.

No. 408,832; Patented Aug. 13, 1889.

N. PETERS. Plwloul mmmm m. Wahinghm u. c

UNITED STATES PATENT OFFICE.

DAVID EVANS, OF ANSONIA, CONNECTICUT, ASSIGNOR OF ONE-HALF TO RUFUS C. ALCOTT, OF SAME PLACE.

MACHINE FOR TlNNlNG COPPER SHEETS.

SPECIFICATION forming part of Letters Patent No. 408,832, dated August 13, 1889.

Application filed January 14, 1889. Serial No. 296,221. (No model.)

To all whom it may concern.-

Be it known that 1, DAVID EVANS, a'eitizen of the United States, residing at Ansonia, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Machines for Tinning Copper Sheets; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable oth ers skilled in the art to which it appertains to make and use the same.

My invention relates to certain new and useful improvements in machines for tinning copper and other metal sheetssuch, for instance, as are used in bath-tubs and the like and has for its object to-produce a machine whereby a coating of the tin may be evenly and rapidly applied to one surface of the sheet to be treated, or, by repetition, to both surfaces.

Heretofore in the tinning of sheet metal it has been usual when the tin was to be applied to both sides of the sheet to dip the latter in melted tin. In applying to one side only, either the molten metal has been brushed on by hand or it has been applied by means of rollers, as set forth in Letters Patent No. 383,116, granted to me the 22d of May, 1888. In the operation of the machine herein described the application of the tin is effected with much greater rapidity than by either of the methods above referred to, and the difficulty heretofore experienced by any chilling or difference of temperature of the rollers is done away with.

In order that those skilled in the art to which my invention appertains may more fully understand its construction and operation, I will describe the same in detail, reference being had to the accompanying drawings, which form a part of this speci tication, and in which Figure 1 is a plan view of a machine constructed in accordance with my invention; Fig. 2, a vertical longitudinal section on the line mmof Fig. 1, and Fig. 3 a transverse vertical section on the line y y of Fig. 1.

Like numerals denote the same parts in all the figures.

1 is the frame or bed of the machine, and 2 sheet and also to straighten the same, and 4 is a swab roll or brush whereby an acid or other flux is applied to the under surface of the sheet from a tank or vessel5.

6 is a furnace placed beneath and adapted to apply heat to a pot or crucible '7, which contains the coating metal.

8 is a pump connected with and adapted to raise the molten metal into the pump-cylinder 9 and thence to force it into a pipe 10, which leads out of said cylinder and across the machine just beneath the feed-line of the sheet. Said pipe is slotted or perforated at its top surface for the ejection of the metal. The pump may be operated independently; but I prefer to impart properly-timed action thereto by connecting it with one of the rolls at the after part of the machine, which, as shown at Fig. 1, are operated by intermeshing gears.

I have shown a single pump only; but it is my preferred construction to use a duplex or a continuously-acting pump, so that the flow of the metal into the perforated pipe may be substantially constant.

11 are pressure-feet arranged on a bar 12 to keep the metal sheet, which is lettered A, in close contact with the pipe.

13 is a hinged and swinging plate, whose edge engages the top surface of the metal sheet immediately above the perforated pipe when the sheet is fullyover the jet, but which hangs downward when no sheet is beneath it and acts as a shield to prevent any of the liquid metal from falling upon the upper surface of the incoming sheet before said sheet passes into the field of the jet.

11 is a swab-brush or felt-covered roll, which serves to evenly distribute the metal which has been thrown upon the sheet, and which also serves to wipe off any surplus. This roll runs in a jacket-ed vessel 15, cooled by a stream of water flowing constantly through the jacket, as from pipes 16.

17 is another furnace arranged beneath a crucible or pot 18, adapted to contain the metal to be applied.

- A pair of rolls 19 20, the upper of cast-iron and the lower of steel, are arranged to act as calenders, and the lower roll runs in the pot and applies a supplemental coating of metal to the sheet simultaneously with the calelr dering operation. The dillerence of material in these rolls is occasioned by the fact set forth in my previous patent, that molten tin adheres to and will be taken up by the steel roller, but has not the same at'tinity for castiron.

In the operation of my machine the feeding and flattening rollers draw in the sheet and the swab-roll applies a coating of the liquid flux to the under surface thereof. Then the sheet, held down by the pressure-feet and the swinging plate, is exposed to the jets of melted metal thrown upon it by the pump from the pipe, and immediately thereafter the second swab evens off the metal and removes any surplus, if need be. The last pair of rolls then apply the supplemental coating from the second pot and simultaneously calender the sheetto a smooth and even surface. In tinning sheets where only a single coating is to be applied the pot of metal under the lower calender-roll may be dispensed with.

I have not thought it necessary to explain in detail how the several rolls and the pump are operated, since this is innnaterial. How ever, as shown at Fig. l, I have in this machine obtained the power for the feeding and flux roll from a pulley I) and the power for the remaining rolls and the pump from pulley C.

I have shown the two pots and the two furnaces, one for the metal used in the jets and the other for that applied by the calendcrs, and while both pots might be heated from the same furnace I prefer them to be inde pendently heated, because the metal to be applied by jet; should be heated to a higher temperature than that which is applied by the rolls.

\Vhile the machine herein described particularly adapted for applying tin to copper sheets, it may be advantageously employed wherever it is sought to coat a base sheet of one metal with a coating or surface of a different metal.

Having thus described the machine, I claim as my invention relative thereto- 1. In a machine of the character described, the combination, with mechanism for feeding the sheet, devices for applying the flux, and the calender-rolls, of the pot, means for heating the same, a, pump connected with said pot, and a perforated conduit connected with the pot and extended contiguous to the face of the sheet, substantially as set forth.

2. The combination, with the pot, the pump arranged therein, and a distributing perforated conduit connectcd with the pump and extended adjacent to the line of feed of the sheet, of the swab-roll engaging the sheet; after the operation of the pump, and a pair of calcnders located behind the said swab and adapted to finish the sheet, substantially as described.

13. The combination, with the pot, the pump arranged therein, and the perforated conduit leading from the pump, of the swab-roll located behind the pump and its pot, and the ealemlcrs, the lower whereof runs in a pot of metal and is adapted in addition to its prcssing function to apply to the sheet a supplemental coating of metal, substantially as set forth.

4E. The combination, with the pot, the pump arranged in said pot, and the perforated pipe, of the swinging shield hung above the said pipe, and whereby the top of the sheet is protected as against the metal of the jet, substantially as set forth.

5. The combination, with the pot and the pump arranged therein and a perforated conduit connected to said pump, of the feedingrolls and the flux-aprdying swab, the swab roll located behind the pump, and the calender-rolls and the second metal pot, whereby the supplemental coating of metal is imparted to the sheet, substantiallyas set forth.

1;. In a machine of the character described, the combination, with the devices for the feeding of the sheet, of the pot and means for melting its contents, a pump arranged in said pot at one end thereof, and a conduitpipe having one extremity connected to said pump and extended across the machine parallel and contiguous to the face of the sheet, said pipe having at its nearest point to the sheet a series of perforations, whereby jets of molten metal may be projectml against the sheet, substantially as specified.

In testimony. whereof I atlix my signature in presence of two witnesses.

DAVI I) EVANS.

Witn esscs:

CHARLES II'. Pncn, CnAs. E. Emma.

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