| 摘要 |
<p>1,164,729. Cage for sows. G. HULIN. 10 Nov., 1967 [10 Nov., 1966; 4 July, 1967], No. 51303/67. Heading AIM. Cage for farrowing and care of sows comprises a base 16, an open-work enclosure 1, one end of the enclosure having a gate 6 adjustably positionable longitudinally and the other end having a feed trough 3, longitudinal members 7, adjustable in their height above the base so as to permit the passage of piglets but not the confined sow, and transverse retainers 21 serving to prevent the confined sow from rising. The rear end of the enclosure is mounted on the base by means of rearwardly curved feet 9 to ensure that a piglet cannot be crushed by the sows rear trotters. An electrical alarm system comprises two adjacent conductors included in an alarm circuit, at least one of the conductors being resiliently displaceable by physical contact of a piglet so as to touch the other conductor and complete the alarm circuit. The contact means of the circuit are either disposed in a pit at the rear end of the cage Fig. 6 (not shown), or disposed across the rear end and at least partway along the two sides of the cage, Fig. 5 (not shown). The alarm system may be independent of the cage Fig. 7 (not shown), and comprise a U-frame which surrounds the rear end of the cage and is folded away after use.</p> |
