Corning Glass Works

Terry O Lanier

Eugene F Martha

Nunna Ramanaiah

A relatively constant concentration of the electrolytic salt bridge solution within a pH reference electrode is maintained by including crystals of the electrolyte salt in a concentrated but not saturated solution. In a preferred electrode, the electrolytic salt bridge is a concentrated KCl solution (e.g. about 4 M/l) within which KCl crystals are held in place by an inert foraminous material disposed intermediate an internal reference electrode and a passageway in the electrode housing through which is established electrochemical contact between the salt bridge and a fluid, the pH of which is to be measured.

PH reference electrode

A disposable applicator card formed of an absorbent backing, to one flat surface of which one or more compressible tubes are affixed. The tubes extend beyond one edge of the backing and are disposed so as to accept a quantity of fluid therein and thereafter to dispense at least a portion of such fluid. Means for aligning the card in connection with utilization means is also provided.

Applicator card

A fluid dispensing device suitable for accepting one or more discrete quantities of test fluids and thereafter dispensing predetermined quantities of such fluid or fluids to a test vehicle. The device operates on a disposable applicator card containing one or more compressible tubes which are filled with such fluid or fluids from a sample tray by peristaltic-like action. The dispensing device permits proper alignment with respect to one another of the sample tray, disposable applicator card, test vehicle, and all components of the device itself.

Fluid dispensing device

A sample tray for containing one or more fluid samples is provided. Each sample is maintained in a separate elevated reservoir affixed to a base plate and each elevated reservoir is surrounded by a catch basin. A wall surrounds each catch basin so that the catch basins are distinct. The tray may have means for alignment of the test specimen reservoirs in cooperation with a utilization device.

Growing community of inventors

Northboro, MA, United States of America

Terry O Lanier