Claims
- 1. Apparatus for counting particles comprising: transducer means through which said particles are passed to generate electrical pulses, the relative sizes of said particles being indicated by the magnitude of said electrical pulses and the number of said particles being indicated by the number of said electrical pulses, said particles having at least one limit of size distribution with an adjacent predetermined range of possible particle sizes where said particles do not normally occur; means for counting said electrical pulses to provide a particle count; first voltage reference means set at approximately the other end of said adjacent predetermined range relative to said one limit; second voltage reference means set at approximately said one limit of said particle size distribution; means for counting, concurrently with said particle count, said electrical pulses between said first and second voltage references and comparing such count to said particle count.
Parent Case Info
The present invention is a continuation of application Ser. No. 031,770, filed Apr. 20, 1979 and now U.S. Pat. No. 4,240,029 which is a continuation-in-part of Ser. No. 780,402 filed Mar. 23, 1977 and now U.S. Pat. No. 4,165,484 issued Aug. 21, 1979 of John L. Haynes for APPARATUS FOR COUNTING PARTICLES IN A LIQUID SUSPENSION, and relates to an apparatus for counting particles in a liquid suspension and more specifically to alarm techniques for indicating defects in the procedure for counting both red blood cells and platelets in whole blood.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3963983 |
Hogg |
Jun 1976 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
31770 |
Apr 1979 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
780402 |
Mar 1977 |
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