Patent GB-190516388-A (GB)
Title: Improvements in, and relating to, Lumber Joining Machines
Inventor: LINDERMAN ALBERT THORP
Filed: 1905-08-11
Granted: 1906-03-01
Abstract: 16,388. Linderman, A. T. Aug. 11. Tenoning and dovetailing; m o u l d i n g; glueing; tools.-A machine for tongueing and grooving the edges of two pieces of lumber, glueing them, and sliding them endways into engagement is shown in elevation in Fig. 1, in plan in Fig. 11, and in cross-sections in Figs. 13 and 18. The cutters 170, Fig. 36, are preferably shaped to form blunt-angled tongues and grooves as shown. Each piece of lumber is moved beneath rollers 100 and past two sets of cutters 170 and a glueing-disk 220 towards the other piece of lumber by one of two parallel chains, the links 42 of which slide on parallel guides 45 on the main frame 40, 41, pass round driven and idle wheels 43. 44, and are supported on idlers beneath the guides 45. Each link has a pivoted work dog 60, Fig. 19; which is projected by a lever 74 pivoted on the wheel 44, and locked by a catch 64, whenever the lever pin 72 engages the filled-in space of a star-wheel or selector 66 which is intermittently rotated by the pins 72. When the ends of the pieces of lumber which have been dovetailed, glued, and slid into engagement are flush, the catches 64 of the dogs which have been advancing those pieces of lumber are tripped by rack-bars 82, 86, Figs. 11 and 13, the middle set of pressure rolls 100 are raised, and the work is ejected by an arm 160 which has been forced backwards against the action of a spring on the shaft 161 by the entering lumber. The rack 82 is normally stationary, being .adjusted to suit the length of the work by a pinion 83 and hand-wheel 85, but the rack 86 is connected by gearing 93, 91 with, and moves at the same speed as, a bar 90 provided with a feeler-arm 94 to engage one piece of lumber during the last part of its travel. The bar 90, which is returned by a spring 95, carries a pivoted spring stop 120 to engage an adjustable stop 121 on a rod 122 and thus oscillate the shafts 125, 128 to withdraw the end of the arm 129 from the inclined cam-blade 132, Fig. 17, on the spring-pressed part 130 of a clutch 130, 131. The aim is immediately returned by a weight 136, and the cam-blade throws the clutch out of gear when the shaft 46 has been rotated once by the gearing 47, 48, 135, 134. One of the wheels 43 is driven directly by the gearing 50, 51 and the other by bevel-gearing 53, 54, 56, 57, but may be stopped by means of a clutch 241 and either a handle 248 or a dog 243, Fig. 18, in the path of one of the pieces of lumber. During the rotation of the shaft 46, an eccentric 140 rocks a compound sleeve 144,148 and by means of rods 151, 152 reciprocates two bars 109, Fig. 6, thus reducing the tensions of the springs 104 which depress the centre pressure rollers, and allowing the ejector 160 to act. The pressure of the end rollers, which are mounted in levers 110 similarly to the centre rollers is not removable, and some of the centre rollers may be disconnected from the bars 109. The top of the eccentric-rod 141 may be moved sideways to reciprocate the bars 109 by a lever 230, the bars being returned by another lever 231<a>. The pressure rollers 100, Fig. 9, have central recesses 117 containing packing saturated with a lubricant. The two spindles 171, Figs. 27 and 28, carrying the cutters 170 acting on each of the pieces of lumber are mounted in a frame 172 which is adjustable vertically by means of a screw 173, each spindle being eccentrically mounted in a tubular frame 174 which can be angularly adjusted by screws 205 and a clamping-ring 201 with a depending projection 202, and longitudinally adjusted by a screw 199, in a split-sleeve part of the frame 172. The bearings are conical, the bushes 178, 185 being screwed into the sockets 176, 177 and provided with notched heads 179, 186 and locking-pawls 180. A nut 187 on the end of the spindle rests on a wearing-plate 190, supported by a plug 189, the interior of the enclosing-cap 188 being supplied with a lubricant through the plug. The plate 190 and nut 187 are perforated for the passage of the lubricant to the bush 185. A groove in the exterior of the bush 178, having inwardly leading radial holes, is supplied with lubricant from a cup 183. The glueing-wheel 220, Fig. 33, is dished, has a perforated periphery covered with canvas, and is mounted on a spring-pressed lever 224 attached to one of the presser-roller frames 103.