Siemens Aktiengesellschaft

Wolfgang Pernegger

Johan Helder

Hubert De Steur

Laurent Danneels

Jan Kuypers

James Piolon

Egon Bussmann

Marc De Vogelaere

Johannes Helder

Karl Holzinger

Heinz Liebler

Gerd Guegel

A two-beam colorimeter comprising an incandescent lamp, a resistor connected electrically in series with the incandescent lamp, a condenser and an interference filter disposed in side by side relation adjacent said incandescent lamp, a two-hole diaphragm for developing a comparison light beam and a measuring light beam, a reference filter disposed in the path of the comparison light beam, and an adjusting filter movable into and out of the path of the measuring light beam.

Two-beam colorimeter

This invention relates to an electroplating device for partially plating a series of items moving along a path at a constant level, the device including at least one electroplating bath positioned along the path having end walls with slots therein through which the items to be plated may pass, and an end wall configuration adjacent the slot which combines with a circulation pump to maintain a constant liquid level in the bath above the bottom of the slot.

Electroplating device for partially plating items in transit

A process control circuit which is adapted for the control and monitoring of a plurality of parameters in one or more metal-depositing baths, has parameter control circuit blocks for each of the parameters to be measured. Each of the parameter control circuit blocks has a measuring stage for producing a measured value corresponding to one of the parameters, a calibration stage for calibrating the measuring stage, a comparison stage for comparing the measured value to a stored nominal value, and a dosing circuit which is connected to the comparator and which doses the metal-depositing bath in response to a comparison signal from the comparator.

Process control circuit for metal-depositing baths

The invention concerns a method for the automatic analysis and determination of the amount or concentration of a specific component of a fluid in a metal-depositing bath, particularly a gold bath, wherein the fluid has several components. A quantity of bath fluid is taken from the bath in a first step. This quantity of fluid is diluted in a second step, in a third step a reaction agent and a solvent are added to a measured fractional amount of the quantity of diluted fluid during constant stirring, and, in a final step, a quantity of solvent-reaction agent mixture is conveyed to a measuring cuvette of a colorimeter and the concentration of the specific bath component is determined by means of colorimetric measurement. In addition, the invention concerns an apparatus for performing the above described method.

Method and apparatus for the automatic analysis of the concentration of

An electroplating device for partial plating of items in continuous transit through a plating bath. The bath includes an enclosure having slots for movement of the articles to be plated lengthwise of the bath. A cross flow of treatment liquid is maintained in the constant level bath through the provision of flow directing vanes, the flow being provided by a treatment liquid circulation pump.

Electroplating device and method for the partial metalizing of elements

A device for the partial electro plating of two-row pin strips utilizing an endless chain of pin strip carrying transfer carriages to move the pin strips through a succession of treatment areas, the pin strips being automatically fed onto the carriages in electrical conductive contact therewith and being automatically stripped from the carriages upon termination of processing.

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Erlangen, Germany

Wolfgang Pernegger