Coulter Electronics, Inc.

Edward N Doty

Walter R Hogg

Wallace H Coulter

Stephen K Campbell

Hari Matsuda

Pedro P Cabrera

Millard D Longman, Jr

Bernard Parker

Humberto A Berra

Warren C Winter

Terry L Siorek

Rafael E Zorrilla

Ignacio B Garcia De Osuna

Millard D Longman

Automatic printing apparatus wherein a single turnaround item-document is utilized as an initial source of intelligible information-data and thereafter by comparing certain of the data on the document with additional data inputted thereto by means of operably associated external hardware and subsequently summarizing the total data on the item effective to provide a final document including both the initially inputted information-data as well as the data resulting from the comparison and summarization.

Automatic printing apparatus utilizing turnaround document

A liquid diluting and transfer valve has disc like valve elements provided with faces frictionally engaged. The valve further includes passageways for passing both sample liquid and rinse liquid and a continuous groove formed in one of the respective faces. This continuous groove effectively isolates the passageway openings to the faces and is capable of blocking passage of leakage material along the face to the periphery of the engaged face.

Liquid sampling valve

A method and apparatus for correcting a particle pulse count subject to coincidence error is disclosed wherein particle pulses, developed in response to passage of particles in a particulate system through a sensing zone, are counted for a predetermined period of time. The predetermined period of time is increased or extended in response to each pulse counted by a time increment that is related to a characteristic of the counted pulse, such as the pulse width, duration, or amplitude. The total additional time period allows the counting of additional particle pulses such that the total count at the end of the extended time period is an error corrected count for the number of particles detected in the predetermined time period.

Method and apparatus for providing primary coincidence correction during

A particle study apparatus which in response to passage of particles in suspension through a sensing device produces electrical pulses which are proportional in amplitude to the size of the respective particles. The apparatus includes a system for ascertaining the particle size above and below which size predetermined fractions of one of the total mass and total number of the particles in suspension are respectively included. If total mass is desired electrical quantities are accumulated in response to each electrical pulse which are proportional to the amplitudes of the electrical pulses. If total number is desired constant electrical quantities are accumulated in response to each electrical pulse. The electrical quantities are designated as being in one of two categories depending upon whether the electrical pulses producing same are greater than or less than a variable threshold. The variable threshold is varied in response to the accumulation of the electrical quantities in order to produce a desired relationship between the quantities such that the accumulated quantities are indicative of the relationship. These quantities are calibrated according to size in order to yield an output representing the dividing size of one of the mass or number of particles in the particulate system.

Apparatus for measuring a particle size dividing one of the mass or

A method and apparatus for correcting a particle pulse count subject to coincidence error is disclosed wherein particle pulses, developed in response to passage of particles in a particulate system through a sensing zone, are counted for a predetermined period of time. The predetermined period of time is increased or extended in response to each pulse counted by a time increment that is a function of a characteristic of the counted pulse, such as the pulse width, duration, or amplitude. The total additional time period allows the counting of additional particle pulses such that the total count at the end of the extended time period is an error corrected count for the number of particles detected in the predetermined time period.

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Pompano Beach, FL, United States of America

Edward N Doty