Abstract: An anchoring apparatus includes a resiliently urged cam assembly. Flukes of the apparatus are automatically set in a sea bed engaging position and are releasable for permitting removal from the sea bed. The flukes are then automatically reset.

Abstract: A knot tying mechanism with improved operational capabilities is disclosed. A twine disc rotatably mounted about a central fixed hub is angularly arranged to position the twine-gripping area for better acceptance of twine from the needle and thereby reduce the incidence of misties due to inadequate gripping. A billhook shaft extends through the fixed hub to properly support the billhook adjacent the twine-gripping area, and to transmit rotational power from the shaft to the twine disc.

Abstract: An improved knot tying mechanism, primarily for use in the agricultural industry, is disclosed. A twine disc rotatably mounted about a central fixed hub is angularly arranged to position the twine-gripping area for better acceptance of twine from the needle and thereby reduce the incidence of misties due to inadequate gripping. A billhook shaft with a worm gear thereon extends through the fixed hub to properly support the billhook adjacent the twine-gripping area. Cooperating gear teeth on the twine disc are engaged by the worm gear so that rotational power applied to the billhook shaft is transmitted therethrough to provide corresponding movement of the twine disc.