Patent GB-272963-A (GB)
Title: Improvements relating to centralized lubrication systems
IPC: B60R17/02
Filed: 1927-06-20
Abstract: 272,963. Tecalemit, Ltd., (Assignees of Soc. Anon. des Etablissements TÚcalemit). June 19, 1926, [Convention date]. Single-acting suction-valveless pumps; two barrels in series; pipes; suction reservoirs.-A lubricating system for motor-vehicles includes one or more distributors each of which comprises a hollow plunger 15, Fig. 2, movable in a cylinder 21 and provided with an annular groove 22 which communicates with the bore through holes 23 and which is adapted to register successively with a number of pipes 24 leading from the cylinder to the members to be lubricated, the cylinder being supplied with lubricant from a pipe 12 through the bore of the plunger, the inlet end of which is provided with a ball valve 18 which is closed by the pressure generated within the cylinder during the discharge stroke of the plunger. The width of the groove 22 is such that the feed to a pipe 24 commences as the feed to the preceding pipe ceases. The plunger is operated by the lubricant supplied by a pump through the pipe 12 acting on a piston 14 secured on the end of the plunger. The piston 14 works in a cylinder 13. and this end of the plunger is closed by a cap 16 provided with a hole 17 which is adapted to be closed by the valve 18. The pump comprises a piston 5, Fig. 1, movable in a cylinder 4, a larger piston 8 working in a cylinder 9 being fixed to the piston rod 6. The cylinder 9 carries two tubes 30, 32, Fig. 3, the former tube being connected to the suction pipe of the carburettor while the latter tube receives a cable 33 connected to a knob 34 on the dashboard. The tube 32 is provided with air holes 35. A lever 38 secured on a member 40 pivoted at 41 in a fork 42 carries two balls 36, 46 controlling the tubes 32, 30, the ball 36 being connected to the cable 33. The member 40 contains a spring-pressed ball 43 coacting with inclined faces on a boss 45 to hold the lever in one or the other of two inclined positions. On pulling the knob 34, the lever is tilted so that the tube 32 is closed and the tube 30 is opened by the balls 36, 46, thus closing the cylinder 9 to the atmosphere and causing the piston 8 to be drawn to the left by the engine suction, thus operating the pump, which delivers lubricant through a pipe 11 and branches 12 to the distributors. As the pump reaches the end of its stroke, a projection 47 on the piston 8 engages the lever 38, rocking it to its original position, thereby closing the suction aperture and opening the cylinder 9 to the atmosphere. A spring 10 then returns the pistons 5, 8 to their original positions, the pump drawing in a fresh charge from an oil reservoir 1 through a valve 3. After each operation of the pump, the piston 14 and plunger 15 are returned to their original positions by a spring 19. The Specification describes other devices, embodying double-ended valves, for controlling the suction action. Alternatively, the pump 5 may be operated by connecting the exhaust pipe of the engine to the other end of the cylinder 9, or may be operated by hand or foot. The Specification as open to inspection under Sect. 91 (3) (a) comprises also an arrangement in which the plunger 15, Fig. 8 (Cancelled), which in this case is not provided with a valve, is actuated by hand through an extension 71, and is returned to normal position at the end of the operation by a spring 73, drawing a fresh charge into the cylinder 21 from a reservoir 1. Ball valves 70 are fitted in the pipes 24, and the pipes may lead to chamber 21<1> supplying a number of parts. This subject-matter does not appear in the Specification as accepted.