Method and apparatus for sorting and counting fish eggs

Details Method and apparatus for sorting and counting fish eggs Method and apparatus for sorting and counting fish eggs

1975-09-26

1977-03-01

Knowles, Allen N.

Classifying, separating, and assorting solids

Adhesion

Coated surface or mass

209 74R, 302 15, 2091117T, B07C 5342

Patent

active

040097820

ABSTRACT:
An apparatus for separating dead fish eggs from live fish eggs is designed to automatically interrogate the degree of opaqueness of each egg in a batch of fish eggs. A selector individually separates an individual fish egg from the batch and injects the separated egg into a fluid stream for delivery past an optical interrogator. Dead fish eggs which display a high degree of opaqueness are optically detected and are hydraulically separated from live eggs which show a low degree of opaqueness. The optical interrogator delivers a light from a light source conveyed through fiber optics to the fluid stream in which the eggs are injected. An electronic detector generates a first pulse for live fish eggs and a second pulse for dead fish eggs. The second type of pulse activates a hydraulic fluid switch which causes the dead fish eggs to be deposited in a separate receptacle by changing the flow direction of the fluid stream. The second pulse further activates a numerical display showing the total number of dead fish eggs sorted. Both the first and second pulses activate a numerical display showing the total number of fish eggs in the batch.

REFERENCES:
patent: 2961046 (1960-11-01), Moeller et al.
patent: 3297157 (1967-01-01), Jensen et al.
patent: 3517807 (1970-06-01), Van Gaalen
patent: 3613884 (1971-10-01), Van Gaalen
patent: 3746166 (1973-07-01), Van Gaalen
patent: 3791517 (1974-02-01), Friedman
patent: 3827555 (1974-08-01), Kamentsky et al.

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