Registers – Platform operated – Platform actuated traffic counters
Patent
1976-09-13
1978-06-13
Thesz, Joseph M.
Registers
Platform operated
Platform actuated traffic counters
235 92ST, 235 92R, 235 98B, 119 3, G06M 1100, A01K 6100
Patent
active
040950921
ABSTRACT:
Aquatic animals (e.g., fish) are counted in the same operation in which the fish are sorted as to size. This minimizes the labor required for counting because it is the same labor as that used for sorting the animals. A grading or sorting barrier is provided with a plurality of parallel holes or passageways, and the fish are urged towards the barrier. Mounted so as to extend across each of the holes is a flexible electrode which normally forms a closed electrical switch. When the animal passes through the hole, it hits the electrode and thus opens the switch. This creates a signal which is stored in an electrical memory. The information stored in the memory is read out sequentially and counted by an electronic counter. The size of the holes in the grading barrier is such that only animals smaller than a pre-determined size will pass through. This serves two functions; it sorts the larger fish from the smaller ones, and allows the operator to set the size openings at a level such that the smallest fish will be counted as they pass through the openings. Then, if desired, the openings can be enlarged, either by substituting a grading barrier with larger holes, or by means of a device which enlarges the holes mechanically, and the remainder of the fish can be counted. The grading barrier can be used when it is horizontal, either in the water or out of the water, so that gravity assists the fish in moving downwardly towards the barrier and through it. The barrier also can be vertical and placed so as to form a wall between two compartments for the fish.
REFERENCES:
patent: 2690158 (1954-09-01), Petty
patent: 2791862 (1957-05-01), Shook
patent: 3096600 (1963-07-01), Gwyther
patent: 3166043 (1965-01-01), Castillo
patent: 3204605 (1965-09-01), Vroman
patent: 3519129 (1970-07-01), Peterson
patent: 3803497 (1974-04-01), Fah Mim Tyau
patent: 3833119 (1974-09-01), Brown
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