Patent GB-1036066-A (GB)
Title: Lubrication
IPC: F16N7/32
Filed: 1963-04-24
Abstract: 1,036,066. Machine tool details; grinding. J. M. CLARK (AUTO RESEARCH CORPORATION). April 24, 1963, No. 16221/63. Headings B3B and B3D. [Also in Division F2] In a lubricating system for spray application of coolants and lubricants to drilling and grinding operations &c. or for application of lubricants to gears &c., a central combination airtrap and filter unit is provided and is supplied with pressurized air from a standard source; a pressure regulator is also provided and includes an air pressure reduction and liquid pressurizing device to form the spray of the lubricant &c. for remote application. In an embodiment, the system has a head unit A, Fig. 1 (not shown), which carries a reservoir B having an upper air inlet chamber C serving as an air-trap and air-cleaner. The chamber C has a sight-glass D and the reservoir has a sightglass E. The head unit A has an air inlet F, a liquid outlet G, Fig. 5 (not shown), an air outlet H and a filler cap N, Fig. 1 (not shown), and is provided with a pressure regulator adjustment K associated with a spring-pressed diaphragm control-valve L, Fig. 7 (not shown), and with a solenoid control valve M, Fig. 1 (not shown). An air filter P is provided for the air inlet F so that filtered air can be passed through an outlet-tube R and a liquid filter Q filters the lubricant &c. in the reservoir B prior to it flowing out through an outlet tube S. The filtered air passes to the control valve L, through a bore 57, a passageway 58, a chamber 59 and then into a chamber 60, Fig. 7 (not shown), having a valve-seat 61 contacted by a plate 62 carried by a diaphragm 63. The chamber 60 communicates at 64 with a gauge J. The valve-plate 62 is normally pressed upwards by a stud 67 which contacts a plunger member 68, pressed upwardly by a spring 69. The diaphragm is pressed downwardly by a plate 70 and a spring 71, having a top contact plate 72 which is adjustable by means of a screw 73 to vary the pressure on the spring 71. The screw 73 is mounted in a sleeve 74. When the air presses up on the diaphragm it will lift the plate 62 away from the valve-seat 61 and air passes from the chamber 59 into the chamber 60. The air then flows from the chamber 60, through a bore 100, Fig. 6 (not shown), into a chamber 101 and then into a chamber 102. The chamber 102 is above a solenoid valveseat 103 with the reciprocating valve 104 on the lower end of an armature 105 opening or closing the valve-seat 103. The solenoid 106 is operated by an electric switch (not shown), and when energized, lifts the valve 104 from the seat 103. The air flows past the seat 103 into a vertical bore 108, a lateral bore 109, a peripheral chamber 110, an oblique bore 111 and into a passageway 112. The passageway 112 leads into a bore 113, Fig. 5 (not shown), which admits air under pressure to a chamber T, which is above and in communication with the reservoir B. The air flows across the chamber T and through the outlet H. The air pressure in the reservoir B and in the chamber T will force lubricant &c. through the filter Q, up the tube S, through bores 129, 130 to the outlet G. In the external system the lubricant &c. and air passes through parallel lines 140, 141, Fig. 10 (not shown), respectively, to junctions 142, 145; to units 150, 151 and Z; and to spray-nozzles 154, 155 and DD.