Patent ES-352012-A1 (ES)
Title: Lead making machine
IPC: H01R43/28
Filed: 1968-03-26
Abstract: An apparatus for feeding and cutting filamentary material into discrete lengths comprises a conveyer 16 movable along a predetermined path between a feeding station 184 and a working station, grippers 110 arranged in pairs on the conveyer, one gripper on each side of the conveyer path, and a controlled feeder means for feeding one end of the filament to one of the grippers and another part of the filament a predetermined distance from the end to the other gripper of the pair through guide means 224, extendible to a position adjacent one of the grippers and retractible during feeding to a position adjacent to but spaced from the said other gripper of the pair, a cutter 246 being provided between the said other gripper and the feed guide means, the discrete lengths of filament then being conveyed to a working station. The gripper which is remote from the feeder means may be pivoted about an axis transverse to the conveyer path, so that after the free end of a relatively stiff filament is gripped, continued feeding causes the gripper to swing out of alignment with the other gripper of the pair and thereby facilitate the formation of a loop of filament between the grippers of a pair. The pivoted gripper is spring-biased into alignment with the other gripper of the pair. The apparatus is described with particular reference to the manufacture of electrical leads, the discrete lengths being conveyed to working stations in which an insulating covering is stripped from the free ends of the length and electrical terminals attached to the stripped ends. The conveyer 16 is intermittently advanced a distance equal to the spacing of the pairs of grippers by means of a motor 34 having an output shaft 38 coupled to a shaft 46. The shaft 46 is coupled to the input shaft 52 of a drive mechanism 54 having an output shaft 58. The shaft 58 is coupled to a shaft 66 secured to the drive wheel 70 of a Geneva mechanism (Fig. 3, not shown) which intermittently rotates a shaft 84 through 90 degrees which intermittent rotation is imparted to a shaft 20 to move the conveyer 16. The grippers 110 each comprise a plurality of identical jaw elements 132 each of which has an elongated vertical slot in which a slide member is located, the jaw elements being alternately fulcrumed at opposite sides so that raising and lowering of the slide member closes and opens the jaw elements. The raising and lowering of the slide member is effected by lever 156 of a bell-crank mounted on pivot 160, the other arm 164 of the bell-crank being secured to plate 168 on shaft 170. The shaft 170 is coupled to an output shaft of the drive mechanism 54 and is driven in synchronism with the shaft 58. The filament is guided to the two positions adjacent the grippers by means of an extensible guide tube 224 moved by means of a sector gear 231. The length of filament is fed via feed rolls 190, 192 which are controlled by a pulse generator 214. The cutter 246 comprises a pair of blades pivotally mounted on parallel spaced-apart pivot pins fixed on a slide. The slide is operated by means of a cam and springs are provided to bias the slide in the direction maintaining the blades in the open position. Movement of the slide brings the blades to a position adjacent the filament, further movement of the slide acts against the spring to close the blades.