Patent GB-784323-A (GB)
Title: Improvements in or relating to a central lubrication system
IPC: F16N25/02
Filed: 1954-05-03
Abstract: 784,323. Lubricating. SCHLOSSHAUER, A. R. May 3, 1954 [May 2, 1953], No. 12830/54. Class 12 (3). In a lubricating system with distributers connected to one another and to a central pump, each lubrication point has a distributer and a control piston associated therewith, the distributers being connected in series, the distributer of the first lubrication point being connected to the main pipe of the pump and the distributer of the last lubrication point being connected to a unit indicating completion of the lubrication process. The system shown in Fig. 1 comprises three distributers 501, 502, 503 connected by pipes 507, 508, 509, 510, the distributer 501 being connected to main pipes 511, 512 leading to a central pump (not shown) and the distributer 503 being connected by pipes 514, 515 to a device which indicates when lubricant has been supplied to all the distributers. Lubricant from the pipe 512 acts against the piston 504 of distributer 501, forcing it to the left, thereby allowing lubricant to pass along pipe 507 to distributer 502. In a similar way lubricant is allowed to pass along pipe 509 to distributer 503. Lubricant at the left end of control piston 504 is forced back to the central pump through pipe 511, lubricant at the left end of piston 505 is forced through pipes 508, 517, 518 to a first lubricating point, and lubricant at the left end of piston 506 is forced through pipes 510, 520, 521 to a second lubricating point. The pipes 514, 515 in the third distributer 503 lead to a cylinder 513 containing a piston 513a which is forced to the left by lubricant in pipe 514, causing lubricant to pass through pipes 515, 523 and 524 to a third lubricating point. The movement of piston 513a acts upon an indicator 525 to show that the lubricating points have all been treated. The direction of flow of lubricant through the main pipes 511, 512 is then reversed so that lubricant passes through the distributers in the reverse direction. The system may be used with a change-over device provided with an electrical locking arrangement as shown in Fig. 2 to control the timing of the lubricating process, the last distributer V3 being connected to an indicator piston 701. When all the distributers have operated, the piston 701 is moved to the right, closing contacts 703, 704 and completing the circuit of an electromagnet M whereby a locking member Sp is unlocked, permitting movement of a piston of the change-over device. This movement opens contacts 706b, 706 and closes contacts 706, 706a, so that the magnet M is de-energized and member Sp is again locked until all the distributers have again completed the lubricating process. The circuit arrangement shown may be utilized in controlling a plurality of distributer groups, each group being associated with a slow-acting relay which falls off if the group has not completed its lubricating process within a predetermined time and switches on an alarm. In a modification, Fig. 4, only one slow-acting relay is provided. The last distributer in each group has a control appliance, e.g. A or B, which transmits an electrical impulse to a change-over relay U each time a lubricating process is completed, thereby operating step-by-step a star-wheel 804. If the star-wheel does not complete a revolution within a specified time a slow-acting relay VR will fall off and cause a signal to be given.