Nuovopignone-industrie Meccaniche E Fonderia S.p.a.

Nuovo Pignone Spa

Massimo Altamore

Costantino Vinciguerra

Francesco Grifoni

Massimo Coppini

Massimiliano Boni

A dobby lever which is insertable into a main lever of a textile loom includes a sliding nut to set and adjust its position along the main lever. The dobby lever has a pair of parallel flat sides, separate but fixed to each other. The sliding nut has a body which can be inserted between the sides of the main lever. The body of the sliding nut has a hole at one end for receiving a joint which can be connected to a driving bar and a blocking device at its other end for the sides of the main lever. The body at the other end has sloping surfaces, and wedge-shaped elements are provided having complimentary slanting surfaces which are insertable into a box-shaped container and act upon the sides of the main lever. A screw element is insertable into the box as a blocking device to adjust the position of the wedge-shaped elements with respect to the sloping surfaces of the body and the sides of the main lever, and a connecting element freely joins and holds the wedge-shaped elements together relative to the sloping surfaces of the body of the sliding nut.

Sliding nut for a dobby lever

A high-speed rotary dobby key mover mechanism having a main crank arm in which two keying levers that have the same arm ratio are mounted for pivotal movement on a cam in opposing positions. The adjacent ends of the keying levers cooperate with a key, while the free other ends of the key levers, which are diametrically opposite about and at the same distance from the axis of the dobby drive shaft for the dobby cooperate alternately with a single control device which is located on only one side of the main crank arm. The control device is regulated, moreover, by a logic unit.

Keying lever arrangement in a high-speed rotary dobby

A method for forming a roller bearing of very small axial dimension and high load-carrying capacity, and applicable also to a large-diameter roller bearing, comprising inserting the rollers into the circumferential guide and rolling track of the outer race and holding the rollers in position by two opposing lateral shoulder-forming spring rings of small thickness which are snap-inserted into corresponding inwardly flared grooves provided in the opposing faces of the bearing outer race. The rings being locked in position by using suitable dies to axially press annular appendices which define the mouth of the annular grooves. Modifications to this method are provided, and the roller bearings obtained in accordance with the invention are described.

Growing community of inventors

Scandicci, Italy

Massimo Altamore