US129124A - Improvement in apparatus for electroplating iron with copper - Google Patents

Description

v v zsh --shefz A. L. FREEMAN. ee et improvement in Apparatus for Electro-Plating Ironl with Copper, &c.

No. 129,124. I Parentedrulyrenz.

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ARTHUR L. FREEMAN, oF SOUTH BOSTON, MASSACHUSETTS.l

IMPROVEMENT IN APPARATUS POR ELEOTROPLATING IRON wITH COPPER, tc.

Specification forming part of Letters Patent No. 129,124, dated July 16, 1872.

Specification describing certain Improvements in Apparatus for Plating Iron with Copper, the invention of ARTHUR L. FREEMAN, of South Boston, in the county of Suffolk and State of Massachusetts.

This invention relates to apparatus for plating sheet-iron or articles made from sheet-iron with copper by the battery process. The invention consists in a combination, with the bath containing the alkaline copper solution in which the sheet or article to be plated is immersed, of a screw or agitator for stirring or keeping the solution in motion while the plating is being effected; also, of a sieve or strainer at the bottom of said bath for depriving the solution of sediment, ,and a pump for drawing oi' the sediment from under the strainer and discharging it within a pickle-bath. The invention also consists in a novel construction of rotary brushing devices, adjustable by the foot, for cleaning the sheets before introducing them to the bath in which the deposit is made; likewise, in an arrangement of feedrollers in front of the brushes for passing the sheets to and between the brushes.

In the accompanying drawing, which forms part of this speciiication, Figure l represents a side view, and Fig. 2 a plan, of the whole apparatus. Fig. 3 is a longitudinal vertical section at the line x; and Fig. 4, a transverse vertical section at the line y y.

Similar letters of reference indicate corresponding parts throughout the several gures of the drawing.

The sheets of iron or articles to be plated are first immersed in a pickle-bath, Gr, and then passed through or between feed-rollers A A', which conduct the sheets or articles to and between a pair of vertically-arranged revolving brushes, B B', made of any suitable material, and-which serve to polish or prepare the sheet for the solution-bath. The sheets or articles thus prepared are then washed in a tank, C, of water, and afterward passed to the bathD, containing the solution for effecting the deposit by the aid of the battery. The brushes B Bl are fast to independent horizontal shafts b b in axial line with each other, and derive their motion, by belts c c and pulleys d d and e e, from an upper main horizontal drivin g-shaft, f. The one brush-shaft b is made capable of a longitudinal motion in its bearings for the purpose of adjusting the one brush B further from or nearer to the other brush to give the brushes any desired pressure on the sheets, and to adapt them to different thicknesses of sheets. This adjustment is effected by means of a lever or treadle, g, which may be operated bythe foot, and which projects from a shaft, h, that carries a fork, t, connected with the brush-shaft b. .The shaft h also has attached to it a bent arm or lever, 7c, which is in slotted connection with the one feed-roller A at its top to allow of said roller, which is hung to rock from its base, adjusting itself and being adj usted by the treadle to the sheet, being fed by it and its fellow roller A. Said feed-rollers A A' are driven by belts s s and pulleys, from or bythe shaft f. A tank, D, with drip-pipe, may be arranged over the brushes to supply water to the sheet while passing in between the brushes. Eis the revolving screw or agitator within the bath D for keeping the solution in motion while deposit is being made, said agitator receiving rotary motion, by belt Z and pulleys m d, from the shaft b of the rotary brush B or otherwise. F is the sieve or strainer at the bottom of the bath D for keeping the solution clear of sediment, and H the pump for drawing oi said sediment and discharging it into the picklebath G. I is the steam-pipe, introduced within the bath D below the strainer F, for heating the solution to any desired degree in the bath D.

The solution which I prefer to use is prepared as follows: Take of sulphate of copper, three and one-half pounds; acetate of copper, seven and one-half pounds; and dissolve in about four gallons of boiling water. When cold add to this solution five pounds of carbonate of potassa and the same quantityof cyanide of potassium, and work with a strong battery.

The sheets or articles to be plated should first be heated by steam in a tank containing potash and lime-water, and then passed to the pickle-bath, through which steam should be turned on, as, by keeping the pickle warm, the pores of the iron are opened, which facilitates the reception or deposit of the copper and quickens the removal of scale and grease.

What is here claimed, and desired to be secured by Letters Patent, is

5. The rotary brushes B B', adjustable in relation with each other, in combination with mechanism for effecting said adjustmentby the foot of the operator, substantially as specified.

6. The combination of the feed-rollers A A', adjustable in relation with each other, and the adjustable rotary brushes B B', essentially as described.

ARTHUR L. FREEMAN.

Witnesses D. MCB. THAXTER, DAVID T. BUNKER.

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