Edward M Stark

US Patent:

39945944, Nov 30, 1976

Filed:

Aug 27, 1975

Appl. No.:

5/604526

Inventors:

Harold E. Sandrock - Rockville Centre NY
Morris W. Leen - Yorktown Hgts. NY
Edward W. Stark - Garden City NY

Assignee:

Technicon Instruments Corporation - Tarrytown NY

International Classification:

G01N 110

US Classification:

356246

Abstract:

A multichamber cuvette for maintaining in independent and separate condition at least two reactants until such time that it is desired to mix them for reaction with each other and a reactant liquid sample while in the cuvette for analysis in the cuvette, and a method of use of such cuvette. There is provided a cuvette body of a suitable plastic defining at least two chambers interconnected by a passageway of relatively small cross section having at least the end portions thereof of capillary size to prevent under many circumstances, as by surface tension, accidental mixture of liquid reactants in the chambers. If there is a substantial head of liquid in one chamber and/or a risk of impact of the cuvette with an external foreign object, sufficient to break such surface tension, an air lock in the passageway when the latter is below the liquid levels in the chambers prevents such accidental mixture. A baffle in the passageway enhances separation of liquids and/or solid substances in the chambers. The chambers are open-topped, and a unitary probe-wiping multi-ply laminated cover of a type puncturable by a probe extends over the chambers closing them from the external environment.

US Patent:

39716309, Jul 27, 1976

Filed:

Oct 7, 1975

Appl. No.:

5/620462

Inventors:

Harold E. Sandrock - Rockville Centre NY
Edward W. Stark - Garden City NY
Steven A. Gyori - Allendale NJ

Assignee:

Technicon Instruments Corporation - Tarrytown NY

International Classification:

G01J 346
G01N 2124
G01N 3316

US Classification:

23230R

Abstract:

Apparatus and method for photometrically analyzing a constituent of interest in body or other fluids and well suited for kinetic determinations which are temperature-and-time dependent. There is provided a sample holder holding a cuvette supporting a liquid sample and other reactants among which is a trigger reactant to initiate the reaction which is analyzed. The trigger and the other reactants are initially isolated in the cuvette. The holder, one of a series, is moved periodically to move the cuvette, one of a series handled sequentially, to a temperature-sensing and preheating station, to a station where the contents of the cuvette are mixed to enable the reaction to proceed, to an optical station where the reaction is viewed for an optical density determination over a period of time under temperature conditions regulated within limits, and to a station for sensing the temperature of the mixture, by immersion of a temperature sensor therein, and supplying data for estimation of the real temperature during the optical determination for inclusion in the determination of the concentration of the constituent of interest, all in a relatively short period of time.

US Patent:

42278104, Oct 14, 1980

Filed:

Jan 26, 1978

Appl. No.:

5/872404

Inventors:

Harold E. Sandrock - Rockville Centre NY
Morris W. Leen - Yorktown Hgts. NY
Edward W. Stark - Garden City NY

Assignee:

Technicon Instruments Corporation - Tarrytown NY

International Classification:

G01N 110

US Classification:

356246

Abstract:

A multichamber cuvette for maintaining in independent and separate condition at least two reactants until such time that it is desired to mix them for reaction with each other and a reactant liquid sample while in the cuvette for analysis in the cuvette, and a method of use of such cuvette. There is provided a cuvette body of a suitable plastic defining at least two chambers interconnected by a passageway of relatively small cross section having at least the end portion thereof of capillary size to prevent under many circumstances, as by surface tension, accidental mixture of liquid reactants in the chambers. If there is a substantial head of liquid in one chamber and/or a risk of impact of the cuvette with an external foreign object, sufficient to break such surface tension, an air lock in the passageway when the latter is below the liquid levels in the chambers prevents such accidental mixture. A baffle in the passageway enhances separation of liquids and/or solid substances in the chambers. The chambers are open-topped, and a unitary probe-wiping multi-ply laminated cover of a type puncturable by a probe extends over the chambers closing them from the external environment.

US Patent:

41610342, Jul 10, 1979

Filed:

Dec 7, 1962

Appl. No.:

4/243163

Inventors:

Edward W. Stark - Garden City NY

Assignee:

Sperry Rand Corporation - New York NY

International Classification:

G06G 719

US Classification:

364822

Abstract:

1. Signal handling apparatus comprising summing means adapted to receive simultaneously signals representing a function taken at one or more different phases of time, means providing simultaneously a plurality of signals representing said function taken at various phases of time, a plurality of multiplying means each of which receives the output signal from said summing means and one of the simultaneously provided function signals, and a plurality of integrating means simultaneously receiving the product output signals from respective multiplying means, whereby peak output signals from said integrating means is indicative of which respective multiplying means receive simultaneously provided signals having the same phases as the phases of the input signals to said summing means.