GB845933A - Improvements in or relating to automatic lubricating systems - Google Patents

Abstract

845,933. Lubricating. CAVALLINI, S. Dec. 27, 1957 [March 15, 1957], No. 40172/57. Class 12 (3). [Also in Group XXVIII] An installation for automatically lubricating a knitting-machine, particularly a machine for making stockings, comprises a transparent oil container 1 which has a cover-plate 3 and houses a pump 4 consisting of a piston 10 working within a transparent cylinder 5. An oil filter 8 is removably attached to a rose 6 which is secured to the lower end of the cylinder 5 and accommodates a suction valve 7, a compression-spring 91 being constrained between the rose 6 and the piston 5. The latter has a non-return valve 13 located in its upper end and a central bore 12, the upper end of which is connected by radial bores with an annular space 14 communicating with a conduit 15 which is formed in a boss 27 in the coverplate 3 and is connected to a pipe for delivering the oil under pressure to an external distributer 16. The latter has distribution nozzles 17 and a nozzle 171 connected to a pipe 23 which returns any excess of oil delivered to the distributer back to the container 1. The machine to be lubricated acts at intervals on a pawl 19 which at each impulse received causes the rotation of a cam 22, bearing upon the upper end of a rod 18 which passes through the cover 3, and a packing 20 therein, and which is connected to the upper end of the piston 30. As the cam 22 rotates the piston 10 is urged downward against the spring 9<SP>1</SP> so that oil in the cylinder 5 is forced up through the bore 12, past the valve 13, and into the annular space 14. When the cam 22 has executed a full revolution a step in the cam allows the spring 9<SP>1</SP> rapidly to raise the piston 10 so that the oil in the annular space is suddenly pumped out to the distributer 16, replacement oil being sucked into the bottom of the cylinder through the valve opening 7. The cover 3 has an oil filling opening 31 and bosses 28, 29, for connection to a stationary support 30, a sealing gasket 3<SP>1</SP> being interposed between the cover 3 and the container 1.