Abstract: A device for transferring digital data between a rotating part and a fixed part of a machine, particularly for hosiery knitting machines and the like, comprising a data transmission unit and a data reception unit, the data reception unit being arranged so as to face the data transmission unit, the data transmission unit and the data reception unit being arranged on two separate parts of the machine, of which one is movable and the other one is fixed.

Abstract: A device for the electronic adjustment of hosiery tension in circular textile machines, whose particularity consists of the fact that it comprises an actuator which is adapted to move a carriage, which is in turn adapted to perform a translatory motion along an axis which is parallel to a diametrical axis of the circular textile machine, the carriage supporting at least one transducer connected to a hosiery advancement device, the transducer being adapted to detect a contrasting force which is due to the advancement of the hosiery item, the contrasting force being processed in a controller which is adapted to emit a speed signal for the actuator, in order to adjust the movement speed of the carriage in contrast with the contrasting force.

Abstract: A device for the electronic adjustment of hosiery tension in circular textile machines, whose particularity consists of the fact that it comprises an actuator which is adapted to move a carriage, which is in turn adapted to perform a translatory motion along an axis which is parallel to a diametrical axis of the circular textile machine, the carriage supporting at least one transducer connected to a hosiery advancement device, the transducer being adapted to detect a contrasting force which is due to the advancement of the hosiery item, the contrasting force being processed in a controller which is adapted to emit a speed signal for the actuator, in order to adjust the movement speed of the carriage in contrast with the contrasting force.

Abstract: An automatic method for adjusting the relative height between a needle cylinder and a stitch forming cam of an automatic knitting machine. A control means stores information for each different type of yarn that the machine might use. This information consists of a relative height for each of two different widths of the item being knitted. Using these two pairs of numbers, the proper relative height for any given width can be calculated using a linear equation. As a stocking is automatically knitted, and different zones of the stocking are produced, the proper relative height is calculated using the stored information, eliminating the need for manual adjustment of either the needle cylinder or the stitch forming cam.

Abstract: A circular knitting machine in which the inactivation or activation of a vertical jack below each needle is determined by a flexible fork located radially of the cylinder within a ring structure completely surrounding the machine cylinder and rigid therewith. A number of forks and radial grooves equal to the number of needles is provided, said forks being able to flex within said grooves and being selected by a magnetic force.

Abstract: Needle selection is effected by an assembly fixed on and rotating with the cylinder and consisting of a plurality of horizontal jacks selected by controlled electromagnets, and an electronic control system. The assembly is provided with Hall sensors which receive magnetic pulses from stationary coil positioned around the rotating assembly.

Abstract: A welding machine is described in which current to the welding electrodes is controlled by an S.C.R. unit. The S.C.R. unit is provided with control pulses in accordance with a predetermined program so that the power fed to the welding electrodes should follow a predetermined characteristic. A simulator is provided to simulate from the control pulses, the energy characteristic that the welding electrodes should follow. The actual energy characteristic of the electrodes is monitored. If the actual energy characteristic falls outside the simulated characteristic, a fault signal is generated.