Patent GB-612437-A (GB)
Title: Improvements in or relating to wringers
IPC: D06F45/04
Filed: 1946-03-14
Abstract: 612,437. Wringers. MAYFAIR SHADES, Ltd., WYNBOURNE, A. H., and RAINBOW, J. C. March 14, 1946, No. 7938. [Class 138(ii)] Means for applying and releasing the pressure between the rollers 2 of a wringer comprises linkwork which is interposed between a spring 24 and the two bearings 3 of one of the rollers and includes equalising mechanism and a toggle 20, 21 adapted when straightened, tc transmit a force from the spring to said bearings sc as to apply pressure between the rollers. The spindles 1 of the twc rollers are mounted at each end, as shown in Fig 1, in bearings 3 movable vertically in inwardlyfacing channels 4 secured to the inside of a casing 5 having side openings to give access to the rollers. The bearings of the lower roller rest on blocks welded to the upper face of an inverted channel 7 mounted in the lower part of the casing 5. The bearings 3 at each end of the upper roller are connected at each end by a pair of links 8 passing downwardly through slots in the channel 7 to the ends of a double lever 9 located within the channel. Downward force is exerted upon a transverse bridge 10 mounted within the arms of the lever 9 by the end of an equalising lever 11 which pivots about a fulcrum 13 engaging a transverse bridge 12 on the lever 11. This fulcrum 13 is adjustable longitudinally of the wringer by means of a rod 14 operable by a handle 17. The lever 11 bears on the bridge 10 by means of a screw 18 which is locked to the bridge and enters a socket in a block 35 pivotally connected to the two parts of the lever 11 by pins 36 passing through vertical slots in the levers 9. The outer end of the fulcrum lever 11 is pivotally connected by a pin 31 to one of the toggle links 20, the other link 21 being pivoted at one end to the link 20 by a pin 32 and at the other end to a pin 30 on an abutment 25 on a vertical stem 22. This stem passes upwardly through a fixed abutment 23 and is surrounded by a helical spring 24; a nut 26 on the upper end of the stem cooperates with the abutment 23 so as to apply compression to the spring 24 even when no pressure is exerted between the rollers. The toggle is controlled by a hand-lever 27 which is mounted on the pin 30 and has forked arms provided with shoulders 28, 29 adapted to engage the pin 32. By pressing the lever downwards, the shoulder 28 engages the pin 32 as shown in Fig. 6, and straightens the toggle into set position; the abutment 25 of the stem then moves downwardly from the fixed abutment 25 and the fulcrum lever 11 is turned in the clockwise direction about the fulcrum 13 so as to apply additional compression to the spring 24, and, through the toggle 20, 21, levers 9, 11, links 8 and bearings 3, pressure to the rollers. To release this pressure, the lever 27 is turned upwards so that the shoulder 29 engages the pin 32 and breaks the toggle. Light springs 33 provided between the abutment 23 and lever 27 urge the latter into the upper position, and, when the toggle has been straightened, maintain the shoulder 29 in engagement with the pin 32. A spring 38 is also provided so as to engage the underside of the bridge 11 whereby the upper roller is pulled downwards even when the pressure mechanism is inoperative. When the wringer is power-driven, the pressure mechanism is adapted to be actuated from either side of the wringer by levers 45, Fig. 7, which are provided with cylindrical spindles 46 having short arms 47; the parts 46, 47 are connected, respectively, to the toggle pins 31, 32 so that by turning either of the levers 45 the toggle may be operated. Specifications 603,142 and 612,499 are referred to.