Patent GB-189819934-A (GB)
Title: Improvements in Machines for Driving Nails.
Inventor: GREEN CHARLES MILLS
Filed: 1898-09-20
Granted: 1898-12-10
Abstract: 19,934. Green, C. M. Sept. 20. Nailing.-Relates to a machine for nailing frames or boxes &c. together. Fig. 5 shows a sectional elevation of the machine, Fig. 3 a plan of part of it, and Figs. 7, 19, and 21 details. The machine comprises two rows of nailing-devices 1, 2, Fig. 5, for nailing two frames &c. simultaneously. The members of each row are independently laterally adjustable on frames consisting of the bar b, end standards c, c', and transverse rods d, d<1>-d<4> for the row 1, and the bar B and standards C, and transverse rods D, D<1>-D<4> for the row 2. The frame B &c. is fixed, while the frame b can be adjusted towards the line X-X, Fig. 5, for boxes of different widths by means of screws rotated by the shaft 9 and bevel gearing. There are other similarly-arrange screws 4 which pass freely through the bar b, engage with the sleeve 5, and have a squared end 6 which slides without turning in the hub of the bevel-wheels 7. These screws 4 serve to adjust the crosshead f to the same extent as the bar b, and serve also as connecting rods between the eccentrics f<2> and the crosshead f carrying the adjustable nail-drivers e', preferably arranged in pairs and at different levels to prevent the nails from splitting the wood. The nail-drivers E' of the row 2 are carried by the crosshead F actuated by the eccentrics F'. These eccentrics are oppositely mounted on the main shaft 1, so that all the drivers approach the centre line X-X together. Each nailing- device consists of a frame 54 supporting a nail box 19, magazine 17, and shoot 16, and the drivers E', e' and feeders 18 are moved along with the frame 54 during the lateral adjustment. The nail boxes 19 are rocked by the shaft 76 through the connecting-rod 79 on one side and through the shaft 82, cam 83, and linkwork 86 to 92 on the other. The shaft 76 is separately clutched to the main shaft 1, so that the nail boxes may go on rocking and feeding the magazines while the rest of the machinery is stationary. The nails Z, Fig 7, are fed one by one by the pickers 27, 28 carried by stems 30, 33 adjustably clamped to the block 31, which is itself adjustably clamped to the bar k, The picker 28 can slide against a spring in its socket 34 to prevent accidental damage. The bars k, K, Fig. 5, are actuated by levers l, Fig. 3, and rock shafts l<1>, L<1> carrying at their lower ends a pivoted catch engaging a projection on the crossheads f, F. The work W is fixed on the bars b, B by the adjustable stops n, N, and is clamped down by levers 66, Fig. 5, pivoted on shafts i, I and actuated by hand-levers I<1>. The machine when started stops automatically. This is effected by a clutch provided with a bolt 108, Fig. 21, which lies in the part 105 of the main shaft and may be turned so as to engage with a recess 111 in the constantly-rotating hub 106. The pin 108 carries a lever 124, which, when not obstructed by the lug 123, allows the spring 116 to turn the pin 108 so as to engage the recess 111. The lug 123 is fixed on the lever 122 connected to the treadle.