Patent GB-343008-A (GB)
Title: Improved manufacture of hinges
IPC: B21D53/40
Filed: 1929-11-06
Abstract: 343,008. Making hinges. MORICHETTO, D.O., 18, Glasschleiferstrasse, Gablonz, Czecho-Slovakia. Nov. 6, 1929, No. 33838. [Classes 83 (ii), 83 (iii) and 83 (iv).] Angular bending; dies; punching; shearing; drilling; riveting.-Metal hinges are formed in a sequence of operations comprising Fig. 1 (I) punching holes 1 and a zig-zag cut 2 and cutting off the parts 3, 4 from a strip supplied at timed intervals, Fig. 1 (III) joggling the hinge tongues of the hinge parts 3, 4 by dies 20 when the plates have been transferred to slots 5, 6 in the machine bed, Fig. 1 (IV) curving over the hinge tongues in dies 21, Fig. 1 (V) smoothing the edges of the curved over portions by flattening dies 27, Fig. 1 (VI) bringing the two hinge parts together to receive the hinge pin cut off from a length of wire fed as in Fig. 12. The complete hinge then slides down a shoot 43 to a multiple drilling machine, to countersink the holes. After the plates 3, 4 are cut off the punched plate 3 drops down the sloping face 11 of machine bed to locate itself in the channel 5 therein while plate 4, Fig. 5, is guided down into its channel 6 by the spring tongues 12 of stripper plate 13 actuated at the correct time. The plates are moved along in these grooves by reciprocating pushers 53, Fig. 20, to come under the various dies in turn and to make room for the next falling sets of binge plates 3, 4. The joggling of the hinge plate tongues is performed by horizontally cam-actuated reciprocating slides 18 with dies, Fig. 6, and vertically reciprocating crosshead 19 with dies 20. The joggled tongues are then turned round, Fig. 7, to form eyes for the hinge pin by dies 21 on the crosshead 19. The edges of these eyes 8 are upset or smoothed or bent over, Fig. 8, by claws 27 of tongs 23 drawn over the raw edges by reciprocated slides 23. The two hinge plates are then brought into register by being tipped from the groove exits by spring tongues 31, Fig. 10, to fall on the top of two collecting slides 30, Fig. 9, which are moved towards each other to bring the eyes 7, 8 into register assisted by an introduction guide 32. The hinge pin is cut off from a length of wire by fixed and movable shear blades 38, 39 as it is gripped by slides 37 and advanced by jaws 35, Fig. 12 moved towards the hinge eyes so that when a length has been cut off, the wire pushes the cut off length, i.e. the pin, into the eyes of the hinge and so completes it. Each hinge then drops down a shoot 43 until it is located between spinning heads 44, Fig. 15, to round off the hinge ends and rivet the pin, the spinning heads being pressed together by a lever 49. This locating is obtained by a stop 47, Fig. 17, to foul the hinge edge when the plate 45 is actuated to force the hinge in position on the slide between the spinning heads. The plate 45 is thereafter actuated to release the hinge which drops to the countersinking multiple drilling machine 51, Fig. 2. If the plates jam in their grooves operation is arrested viz. hinge pushers 53 are connected to rod 55 withdrawn by cam 56 and pushed forward by a spring. A feeler 58 on rod 55 normally pushes rod 59 of eccentric 61 out of engaging position with stop mechanism actuated by rods 62 from eccentric 61. If pushers cannot move forward owing to hinges jamming in their grooves, feeler 58 cannot move eccentric rod out of the way, in which case it operates stop rod 62 to open the main drive clutch and stop the machine.