| 摘要 |
824,020. Attaching electrical components to circuit boards. MULLARD Ltd. Feb. 5, 1958 [March 7, 1957], No. 7589/57. Class 83 (2). [Also in Group XXXVI] Electrical components 3 with wire leads are affixed to the periphery of a substantially circular platform 1 by rotatably supporting the platform relatively to a component supply station from which a component is moved by a feed member into a desired position on the periphery of the platform, the latter being thereafter rotated to a position for reception of the next component. A circuit unit, preferably for a computer, consists of a number of components 3 located between a pair of platform discs 1, which may have printed circuitry, with their wire ends located in notches 4 in the periphery of the discs and soldered therein. Contact pins 2 connect the unit to an external circuit. For assembling the components the discs are mounted between rollers 11, 12, 13, Fig. 2, with a flat portion 16 of an indicator shaft engaging in a slot 5 of one disc. Components are fed manually or automatically from one or more magazines, or from a turret, into guide slots 17. Upon depression of a spring-loaded handle 18, pivoted at 20, operating links 22 are moved downwardly about their pivots 23 and by means of links 25, cause a feed-arm 26 to pivot in the direction of arrow 28 about axis 27. Jaws 32, 33 of the feed-arm thus engage and shear-off the ends of the component wires against shearing edges 31 and then press the component into adjacent notches 4 of the discs. Upon release of the handle a pawl 46 on link 25 acts through a ratchet 45 and gears 47, 48 to rotate the discs through one notch spacing. After a number of components have been attached a cam 35, actuated by a pawl 39 and ratchet 40, raises a pair of solder baths 34 sufficiently for them to be engaged by a lifting hook 43 on the next operating stroke. This hook further lifts the baths for immersion of a portion of the periphery of the discs into the hot solder for soldering the components. The apparatus may alternatively be adapted for completely automatic operation. |
