Animal husbandry – Waste toilet or related device – Walled receptacle; e.g. – litter box – etc. – containing...
Patent
1978-08-01
1979-11-27
Kinsey, Russell R.
Animal husbandry
Waste toilet or related device
Walled receptacle; e.g., litter box, etc., containing...
A01K 2900
Patent
active
041755170
ABSTRACT:
A pigeon trap including a two-level walkway and a locking mechanism barring entry of animals such as house cats and other predatory quadrupeds of comparable size. The upper level walkway is or is covered by a hinged deck plate which remains in a tilted, off-horizontal position as long as there is no weight on it, and in this position it exerts an upward force on one end of a pivoted balance beam through a rod connecting the two members. This causes the opposed end of the balance beam to be depressed, thereby freeing the lower ends of the pivotally mounted bobs which would otherwise be locked in place by the balance beam. In this position of the members, a pigeon standing on the lower level walkway can push the bobs out of his way and fly into the loft.
The hinged deck plate will be depressed when any animal weighing less than the average pigeon walks on it, depressing the adjacent end of the balance beam and causing the far end to be raised, in which position the lower ends of the bobs enter registering holes in the far end of the beam, locking the bobs in place. This creates no problem for the pigeon, because as soon as he jumps to the lower level, the hinged plate springs upward, again freeing the bobs. The lower level is too small, however, to accommodate the full weight of a house cat, who can get his forelegs onto the lower level but must keep the rest of his body on the upper level, thus keeping the plate depressed and keeping the bobs locked in place like the bars of a prison cell.
REFERENCES:
patent: 1301660 (1919-04-01), DeCorte
patent: 2518588 (1950-08-01), Allen
patent: 2682726 (1954-07-01), Gustin
patent: 3016878 (1962-01-01), Kallal
Kinsey Russell R.
Smith, Jr. Roy Hammond
Swiatek Robert P.
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