Patent GB-243740-A (GB)
Title: Improvements in lubricating systems and devices therefor
IPC: B61K3/02
Filed: 1925-11-25
Abstract: 243,740. Tecalemit, Ltd., (Assignees of Fouquet, E.). Nov. 25, 1924, [Convention date]. Single - acting bucket pumps; oscillating cylinder pumps; revolving cylinder pumps.-In a device for lubricating chains wherein a union element is adapted to engage with a pivot pin of the chain and accompany it during a part of its travel, the union is carried by a member which. in its movement therewith. acts as a valve to cut off the supply of lubricant to the member and causes the lubricant trapped therein to be effected under increased pressure. As shown in Figs. 1 and 2, flanged unions 21 adapted to co-operate with flanged heads 26 on the pivot pins 24 of the chain 25 are carried on hollow rods 19 arranged radially around & rotatable shaft 1, the rods 19 having pistons 18 slidable in cylinders 12 carried by hollow tubes 7 slidable in holes 6 in a plate 3 secured to the shaft. A cylinder 5 secured to the plate 3 constitutes a lubricant reservoir, the other end of the cylinder being closed by a sliding piston subject to atmospheric pressure, springs or weights. The cylinders 12 have projections 13 engaging slots 13<1> in the shaft. To bring the device into operation, a cam 27 is moved in the direction of the arrow 28, so that, as the chain 25 moves along, a union 21 engages with a head 26, causing the shaft 1 to rotate. During the engagement of the union 21 with the head 26, the piston 18 is first pushed ino the cylinder 12, causing lubricant to be ejected into the pin 24 past a valve 23, and the piston is then retracted by a spring 22, drawing a fresh charge into the cylinder 12 through the tube 7 and passages 13a. The cam 27 is arranged so that, when the union 21 leaves the head 26, a spring 15 moves the tube 7 further into the reservoir, facilitating the recharging of the cylinder 12 and removing the union from the path of the chain. In the form shown in Figs. 3 and 4, the reservoir 5 is fixed in position and the cylinder 12 is formed in a member 32 integral with the tube 7, which is slidable and oscidatabla in a hole in the reservoir. The apparatus is brought into action by moving forward a cam 27 which acts on a roller 41 mounted on the member 32 and is backed by springs 43. The member 32 is normally held in position I, Fig. 4, by a spring 40. During movement of the chain in the direction of the arrow 43<b>' the union 21 engages with a head 26 and causes the member 32 to swing from position I to position II, during which the piston 18 ejects lubricant, and then from position II to position III, during which a new charge is sucked into the cylinder 12. The head 26 then leaves the union and the member 32 is swung back to its original position by the spring 40, ready for the next head 26. A spring-pressed plunger 36 arranged in the upper end of the cylinder 12 is engaged by the piston 18 prior to the end of the stroke of the latter, thereby ensuring complete discharging and recharging of the cylinder 12. In a. further construction shown in Figs. 5 and 6, the reservoir 5 and member 32 are both fixed, the union 21 sliding in a stationary guide 49 and being open at both ends. A head 26 on the chain passes into the outer end of the union and abuts against pivoted catches 45, 46 in the union, thus causing the union and piston 18 to move inwards. When the catches 45, 46 come outside the guide 49, they turn outwards, releasing the coupling. The union is then moved outwards by the spring 22 to engage the succeeding head 26.