Patent GB-842449-A (GB)
Title: Apparatus for assembling electrical components as circuit panels
IPC: H05K13/04
Filed: 1957-11-08
Abstract: 842,449. Assembling electrical components on circuit panels. SYLVANIA ELECTRIC PRODUCTS Inc. Nov. 8, 1957 [Nov. 16, 1956], No. 34947/57. Class 83 (2). [Also in Groups XXIV and XXX] Apparatus for assembling electrical components 31 with laterally-extending leads upon an electrical circuit panel 19 comprises a chuck 157 for receiving the components, means 23, 135 for moving the chuck to a position adjacent the panel, a pusher 151 movable relatively to the chuck for engaging a component and pressing its leads through apertures in the panel, and lead forming means 173, Fig. 10, within the chuck for combing the leads as the component is moved by the pusher. Printed-circuit panels 19 are fed intermittently along a conveyer 27 and stopped beneath a component assembly-head 17, as described in Specification 809,779. The head is mounted on a C-frame 11 and comprises a housing 12 rotatable in the frame 11 and carrying a detachable turret-type component magazine 13 having around its cylindrical periphery a number of longitudinal slots 29 wherein the components are superposed and biased downwardly by weights 33. These components are preferably wafer-like ceramic-based R-C printed components and are fed successively from a slot 29 into a shoot 125 by a horizontallyslidable finger 115. When the component supply in the slot is depleted a rod 35 on the relevant weight 33 trips an electrically-operated air valve 63 which causes a fluid motor 69 Fig. 3, to actuate a pawl 103, Fig. 4, which indexes the turret and brings the next slot 29 into line with the shoot. The latter conveys the components to the chuck 157 comprising two resilient sections 159 mounted on a guide-block 143 slidable vertically in a bush 145 and actuated through a compression-spring 133 by a fluid-motor 23 whose piston-rod 127 has a resilient connection 124, 128 with a shaft 135 carrying the pusher 151. With a component 31 disposed in the chuck, Fig. 5 (not shown), motor 23 is energized whereby the pusher 151 and chuck 157 are lowered until a stop-collar 139 on the guide-block 143 engages surface 141. Shaft 135 continues its movement by compressing spring 133, whereby bottom groove 153 of pusher 151 engages the component and forces its leads between comb teeth 173, Fig. 10, in the chuck sections 159. A cam member 155 on the pusher then co-operates with brackets 165 to force the resilient chuck sections 159 apart to release the component and permit its leads to be forced through the panel 19. The down-stroke of the pusher ceases when a ledge 131 engages an adjustable stop 132, the final part of the stroke being cushioned by spring 124. During the downstroke a cam 113 on the shaft 135 causes spring-loaded finger 115 to be retracted and allows the lowest component in the magazine slot 29 to fall on to support surface 117. An interlock switch or a timing mechanism then energizes a motor 25 whereby a clincher 21 moves upwardly to clinch the protruding leads on to the printed circuit. Motors 23, 25 are then reversed to return the clincher and assembly head to their initial positions. The motors 23, 25 may be controlled as described in Specification 842,448. During the upstroke of shaft 135 and cam 113, the finger 115 pushes the component 31 into the shoot 125. The upstroke of the chuck is arrested by its stop caller 160, Fig. 2 (not shown), engaging the bottom of housing 12; the pusher 151 continues its upstroke, thereby withdrawing cam 155 from brackets 165 to close the chuck. Finally stoppin 156 on the pusher engages the guide-block 143 to stop the upstroke. The housing 12 is rotated in its frame 11 by a handle 177 for orienting the chuck and hence the component with the holes in the panel.