Electroformed Circuitry U.S. Patent5,364,277. Nov. 15, 1994 WT. Crumly et al., assignors to Hughes Aircraft Co., Los Angeles

An electrical circuit comprising a dielec- tric substrate, and a pattern of conductive traces on one side of the substrate with at least one of the conductive traces having a three-dimensional conductive circuit fea- ture formed integrally therewith and pro- jecting from the trace surface in a first direction for providing a readily connecta- ble and disconnectable pressure intercon- nection to another element.

Electroless Gold Bath U.S. Patent5,364,460. Nov. f5, 1994 K. Morimofo et al, assignors to C. Uyemura & Co. Ltd., Osaka, Japan

An electroless gold plating bath com- prising a gold sulfite; a sulfite as a complexing agent for gold ion; at least one reducing agent selected from the group consisting of a hydrazine, ascorbic acid, a salt of ascorbic acid, trimethylaminebo- rane, and dimethylamineborane; and an organic phosphonic acid or a salt thereof.

Hot-Dip Coating Process U.S. Patent5,364,478. Nov. 15, 1994 H. Tasaki et al, assignors fo Nippon Mining 8 Metals Co. Ltd., Tokyo

A method for producing a brown coated article, wherein an iron substrate is dipped at a temperature of from 430-6OOT in a molten zinc plating bath containing from 0.05-l% by weight of manganese, so as to zinc hot-dip galvanize the same, a heat treatment is carried out to convert a zinc-manganese phase formed by the zinc- hot dip galvanizing to a zinc-manganese- iron phase, and, subsequently the zinc hot-dip galvanizing layer is brought into contact with an acidic aqueous solution containing an oxidizing agent.

Acid Etch Apparatus and Process U.S. Pafenf $384,494. Nov. 15, 1994 G. E. Hutchison and R. L. Riddle, assignors to Universal Engraving Inc., Over/and Park, Kan.

A method of acid etching a metal die comprising the steps of positioning a metal die above a bath of acid etch solution; exposing the metal die to the acid etching

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solution that is in the bath; allowing acid solution to overflow at a level from the top of the bath, recirculating at least a portion of the acid etch solution, which overflows from the bath, back into the bath; and maintaining the temperature of the acid etch solution.

Magnetron Cathode U.S. fatent5,364,518. Nov. 15, 1994 K. Ha@ ef al, assignors to LeyMd AG, Hanau, Germany

An apparatus for coating a substrate, comprising a tubular cathode on which a tubular target is fixed, said cathode being rotatable about a central axis.

Method of Electroplating Half Sliding Bearings U.S. fatenf5,364,523. Nov. 15, 1994 7: Tanaka et al, assignors to Daido Metal Co. Ltd., Nagoya, Japan

A process for electrodepositing a metal- lic layer on half sliding bearings in an electroplating tank, wherein the electrode- position of the metallic layer is carried out while the bearings are moved vertically in

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152 METAL FINISHING . JUNE 1995

at least one of two conveyors on a sliding plate on which the bearings are arranged in mutual contact with one another and con- nected to a cathode.

Galvanizing Apparatus U.S. Paferlt 5,364,667. Nov. 15, 1994 K.K. Maifra et al., assignors to A/bed Tube & Conduit Corp., Harvey, 111.

A method of continuously galvanizing a substantially cylindrical linear element of substantially circular cross-section com- posed of a ferrous metal, the method comprising providing an upwardly-open reservoir of molten zinc; providing an atmosphere of inert gas within an enclosed space above the surface of molten zinc; providing an annular nozzle with the en- closed space comprising inner and outer annular members defining a frustoconical annular slot therebetween as the nozzle orifice; driving the linear element axially through the opening in the inner member at a linear velocity between 90 and 1,000 ft/min; effecting flow of molten zinc up- wardly from the reservoir and through the annular nozzle to direct a flow of molten zinc to apply a coating to the linear

element; whereby the linear element is galvanized without immersion.

Blast Cleaning System U.S. fatenf5,365,699. Nov. 22, 1994 J. Armstrong Wsflake, Ohio and J.R. Becker, Norfh Ridgeville, Ohio

A system for blast cleaning a surface, comprising means for providing a high- pressure stream of a cyrogenic substance; means for storing solid pellets of carbon dioxide; means for mixing the solid pellets of carbon dioxide into the high-pressure stream; and means for propelling the mix- ture towards the surface to be cleaned, the high-pressure stream of the cyrogenic sub- stance being propelled in a combined liquid and gaseous state.

Shot Peening Machine Sensor U.S. Pafenf 5,365,762. Nov. 22, 1994 R.A. Thompson, assignor to General Electric Co., Schenectady, N. Y

A suction-type shot peening machine sensor, wherein the sensor is comprised of a suction-type shot peening gun having a

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suction chamber; and a pressure detection means operatively connected to the suction chamber for measuring a pressure in the suction chamber.

Abrasive Article U.S. Pafenf5,365,523. Nov. 22, 1994 D./I. Rowenhorsf and TA. Serg, assignors to Minnesota Mining and Mfg. Co., St Paul, Minn.

An abrasive article comprising a binder and abrasive grits, wherein at least 10% by weight of the abrasive grits are abrasive particles, each having a front face and a back face, said front face having substan- tially the same geometric shape as the back face, the faces being separated by the thickness of the particle, the ratio of the length of the shortest facial dimension of the particle to the thickness of the particle being at least 1: 1.

Polishing Composition U.S. Patent 5,366,542. Nov. 22, 1994 7: Yamada et al, assignors to Fujimi Inc., Aichi, Japan

A polishing composition comprising water, alumina as abrasive particles, and a

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