Patent GB-299842-A (GB)
Title: Improvements in apparatus for impregnating timber, logs, sleepers and the like
IPC: B27K3/02
Filed: 1928-09-21
Abstract: 299,842. Steinfeld, R. Nov. 2, 1927, [Convention date]. Wood, trcating with liquids.-In apparatus for impregnating wood of the type in which a cap with a resilient edge is applied to the wood, mechanism is provided for forcing the cap down upon the wood and for lifting it, guiding mechanism being also provided for moving the cap along the wood. The vessel containing the impregnating liquid is preferably mounted on the same frame as the cap, and is provided with a spring-pressed piston which maintains pressure on the liquid. The apparatus described comprises a vessel 13, Fig. 1, from which the impregnating medium is fed through a hose 12 to a container 11 which communicates with a cap 15 adapted to fit the surface of the wood to be impregnated. The cap may be of indiarubber. Both the cap and the vessel 13 are mounted on a frame 17, which also carries an operating handle 22 pivoted to the frame by a pin 21. The projecting end 23 of the handle is pivoted to a link 24 which is pivoted at its lower end to a lever 25 pivoted at its mid point to the frame 17 and the other end of which is connected to the cup 15. The vessel 13 contains a spring loaded piston 30. The spring 32 is preferably adjustable; as shown, its upper end bears against a plate 33 which may be moved along telescopic guides 40, 41 by means of a screw 36. In order that liquid may be admitted to the cap only when the latter is pressed upon the wood, a slotted link 47 is pivoted to the end of the lever 25, and is provided with a short rack 48 the teeth of which mesh with teeth on a cock 49 controlling the supply of fluid from the vessel 13. The link 24 includes a spring 60 which regulates the pressure of the cap 15 on the wood. To enable the device to be moved along the timber, the frame 17 is' mounted on one limb 62, Fig. 2, of a cramp, the other limb 63 of which is adapted to slide within a sliding part 64 of the limb 62. The limb 63 is secured to two rods 66, 67 between which is a pile of leaf springs 70 the edges of which are housed in slots in the rods. A spring- pressed bolt 73 engages notches 77 in the rod 66 to hold the clamp in position. Rollers may be provided on one or both jaws of the clamp: as shown, one roller 81 is provided. In the arrangement shown in Fig. 4, the bottom jaw is of V- shape and is provided with balls 87 to facilitate sliding of the log. One or both of the limbs of the clamp carries a cross bar 90, Fig. 1, provided at its ends with abutments, preferably rollers 91, 92, to engage the timber. Means for sliding the clamp along the timber consist of two levers 95. 96, Fig. 5, the latter embracing the rod 62 at one end, while the former is pivoted to the latter and abuts against the wood and forms a fulcrum for the lever 96 so that the clamp may be moved by pulling the handle 97. A spring 98 attached to the lever 95 and to the clamp returns the levers when not in use. The apparatus may include a piercing tool 100, Fig. 1, operated from the lever 22 by means of links 106, 107, the latter sliding on a guide 110. The depth of penetration of the tool is adjusted by sliding a block 116 carrying the joint 105 in a slot 117. A sleeve 118 having internal and external threads of opposite hands screwing into the lever 22 and into which screws a rod 121 attached to the block 116 adjusts the latter. The piercing tool and cap may be arranged side by side on the frame, and may be operated by separate levers.