US1517631A - Anode for use in electroplating - Google Patents

Description

Dec, 2, 1924.

1,517,631 (5 JONES ANODE FOR USE IN ELECTHOPLATlNG Filed Dec. 15 9 3 2 Sheets-Sheet l J3: we :4 2 0 r": 6111125145 Jone-5.,

Dec. 4- 1 1,517,631

. G. JONES ANODE FOR USE IN ELECTROPLATING Filed Dec. .3, 1923 2 Sheets-Sheet, 2

Patented Dec. 2, W2 2i.

hd'lhtt' GIRALDUI? JQNEE, 013 BEJK'MINGHAM, ENGLAND.

ANUDE non USE IN ELECTROPLATING.

Application filed December 13, 1923. Serial No. 680,306.

To all whom it may concern:

Be it known that I, Griimnnns Jones, a subjectof the King of Great Britain, of 58, St. Uswalds Road Small Heath Park, Birmingham, England, have invented certain newand useful Improvements in Anodes for Use in Electroplating, of which the following is a specification.

This invention relates to improvements in anodes for use in electro-plating and refers to anodes particularly adapted for use in the electro-deposition of metals such as nickel or cobalt which are commonly supplied comniercially in the form of small pellets, shot rondelles or cubes.

(hie object of my invention is to provide an improved type of anode in which the metal can be efficiently employed in this form without the necessity of melting it down and casting it in the form of plates.

Another object of my invention is to pro vide an anode in which the leads by which electric current is conveyed to the plating metal are eficiently protected against the action of the acid or other electrolyte in the plating vat or tank so that the effective work ing life of the leads and hence of the anode as a whole is considerably prolonged.

A further object is to provide an anode which possesses the advantages set forth above, but which is comparatively simple in construction and can he manufactiu'ed at such a cost as to make it a satisfactory commercial article. 1

These and other advantages of. my invention will be apparent from the description herein in conjunction with the accompanying drawings in which.

Figure 1 is a perspective view of the complete anode with part of one side broken away.

Figure 2 is a vertical section through the lower part of the anode.

Figure 3 is a transverse section plan of the lower part of the anode.

Figure 4: is a perspective view of the current leading member with the upper part broken away.

In the form illustrated the anode consists of a hollow box which is built up from a rectangular frame of wooden strips or battens or. and is closed on both sides by perforated sheets I) of celluloid or other acidresisting material. These sheets I) are se cured to the wooden framework by screws 0 of which the heads are covered after insertion with celluloid or acid-proof varnish to protect them against the electrolyte.

The upper'batten a has a central aperture d through which the plating metal. in divided form is adapted to be introduced, and has further apertures near each end for the passage of the current conveying and anode suspending rods 6.

These rods at their upper ends are bent round into eyes 1 to receive a horizontal rod or hook by which the anode is suspended and by which electric current is conveyed to the rods, and at their lower ends are secured into a transverse bar n which passes across the bottoi'n oi the anode and the ends of which project into recesses 11. in the side but tens a, so that the weight of the anode can be supported by the rods c.

To protect the rods 6 and bar 9 from the action of the electrolyte they are entirely covered with a coating of celluloid or other acid-resisting material from a point just below the eyes 7, but in order that current may be conveyed to the plating metal in the anode, part of this coating is cut away at, or near, the centre of the bar 9 to leave an exposed part j of the bar. Part of the lower strata of the mass of divided metal in the anode, some of which is shown at Z- in Fig. 1, makes contact with the exposed part of the bar 5 and thus electrical contact is established between the eyes f of the rods 5/ and the divided plating metal and current is conveyed thereto.

The only part of the bar g which is on posed to the electrolyte is the upper face near the centre and the action of the electrolyte onthis part is extremely slow, and adequate protection is provided for the junc tions of the rods 6 with the bar 9, at which points electrolytic action would be rapid if exposed causing the junctions to be eaten away and the rods 6 to become detached from the anode. The sides of the central portion of the bar g which would otherwise be exposed to the electrolyte entering the anode are also protected by the covering, and only the upper surface on which the anode metal actually lies is left exposed.

lhe rods e and the bar 9 may conveniently be of the same metal as that which is to be deposited.

The bottom or feed bar g is preferably made of especially hard rolled nickel which v container, current conveying means in said container disposed so that the anode met-o1 when in the container will rest on e portion of said current conveying means and said current conveying menus heingg protected on all sides from the electrolyte except the portion on which said anode metal Will rest.

2. An anode for use in electroplating, comprising a hollow closed container having perforated side walls, {U1 aperture in the upper end of the container for the insertion of plating metal in divided form, suspension and current carrying rods secured at their lower ends into a transverse feed her passing across the container, a protective acid-proof costing over the said rods and feed her, and an unprotected portion of the said feed her Within the eontuiner upon which the anode metal will rest.

3. An anode for use in ele:tro-pleitino comprising a holler closed cont-inner her ing perforated side Wells, on uperture in the upper end of the container "for the iiuiertion oi o g metal in divided 1 in, sinuiension and current carrying rods seiu'ired. nt lower ends into a transverse feed her ing across the container; :ti o proof coating over the seid rods end feed hen and en unprotected poi on of the suid feed her, Within the conumier, protected portion of the her cutting away the protee of the upper iuce oi, me her.

4-. An anode for use in electroplating comprising :1 hollow closed container hering perforated side wells, on aperture in the upper end oi thewoi'itniner for the in sertion of plating metal in the divided form, suspension and current carrying secured at their lower ends into n trensverse feed her passing across the container, & pro tective acid-proof coating over the reid rods and feed our, and un 'iroteci'iive portion oi? the snid feed her within the container, pleting metal being adopted to he introduced into the container through the uperture in the upper end thereof and to make electrioel ,ernosr content with the unprotected portion of the transverse her.

5. An enode 'i'oi' nee in clcctro plating, comprising; a hollow closed irontuiner having performed side wells, en uperture in the upper end of the container for the insertion for plul'ingi; motel in divided form, suspension and eurroni eurryin g' rods secured at their lower ends into n truusvorsc feed her pushing urro the mntuii'ielz, u protective :u id-qn-rmi (routing over the sold rods end teed our, un uiumrlerted. portion oi? the said feed lliki u'ii'hin the mniiuiner, the upper ends of the suiuwnsiou and ourrcnt hurrying rods pi'ojo ..-i=ug shove the upper ends oi the container and living; uuprolcusi'ed and hunt round to revolve means from which the anode is suspended and hy which electric current is conveyed lo ihe rods.

(3. An lil'lPlUVMl unode for use in elcciroplating; con'iprii-iiug n reciungulur frame of wooden n closed on hoih sides by perioratod shee m of celluloid secured to the strips,

' we in the upper strip for the inneranode metal in divided form, n horizoniul :oiotel hur passing :irross the unode und projecting into recesses into the side strips of the ironic rods projecting through the upper eta-i1 i of the frame and secured. at their im kit) the lun'iimntul bar, a protective proof contingover the sold rods end over i'he said hen with he exception of i *h. whirh is exposed for (stein eoniuo'e'; with the hinting; cried into the enode.

use in eleotro-phiting utuiuer For receiving anode 1E For-uh and :1 current eon reyii he iuitiom of the (.Ql'lllilll'lill severed end protected from the eleotrolyie except to? u portion :u. the top i'hereo'li wherimu the divided motel will on end rest: uu iris-mi eonluri. with the her.

8. in on unode for use in. elcctro-pluLineu e hollow contuiner i'or il'fil'filvllig :inode i'netiil in divided form, :1 current conveying her in the bottom of the routuiuer, the ends oi which extend into {he opposite sides oi the couiuine the her being; wvered and protected from the electrolyte except for on internuuliute gioition 'J'hereo'l' hereon (he diviii n'ic"il will engage melting); Qlectl'iuul h the her, suspension rods engaging the her udjueent the ends thereof and extending shore the eoniuinor for suspending it in. testimony whereof -l' nllhi my signature.

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