Patent GB-594385-A (GB)
Title: Improvements relating to wringing machines, mangles and the like
IPC: D06F45/18
Filed: 1945-07-03
Abstract: 594,385. Wringers. KEY, R. P., SHAW, J., and HAMMOND, A. A. July 3, 1945, Nos. 16931/45 and 7366/46. [Class 138 (ii)] A wringing or like machine comprises, as shown in Figs. 1 and 3, a driven roller 3, carried by a rigid frame member 1, a co-operating roller 4 carried by a second rigid frame member 2 which is pivoted to the first frame member about an axis substantially parallel to the axes of the two rollers, and an adjustable compression spring 23, which urges the rollers together, both the pivotal connection between the frame members and the adjustable spring being disposed at one end of the rollers so as to leave the opposite end of the rollers free to permit material to project beyond them. Each roller is supported on one set of bearings 12 located within its associated frame member, and also in a second set of bearings 13 carried by a fixed extension of the respective frame member and located within the roller. The rollers 3, 4 are supported, in the arrangement shown in Figs. 1 and 3, by tubes 8, 9 extending, respectively, from the rigid frame members 1, 2, which are in the form of aluminium castings, and the pivot pin passes through lugs 6, 7 on these members. The rollers 3, 4, which are of rubber, are mounted on foundation rolls 10, 11 journalled respectively on the tubes 8, 9 by the ball-bearings 12, 13. A tubular drive shaft 14, carrying the crank handle 15, passes coaxially through the lower tube 8 and at its outer end is pinned. to an outer bearing member 16 which is rivetted to the cylinder 10 ; the inner end of the shaft 14 has a bearing 17 in the tube 8. The upper roller 4 is held in place by a spigot 18 which is rivetted to the tube 9 and carries the inner track of the roller bearing 13, the outer bearing member 22 being fixed to the cylinder 11. At the side remote from the hinge pin, the castings 1, 2 are recessed so as to house the spring device consisting of a coiled compression spring 23 enclosed in cylindrical. telescopic cups 24, 25, the lower 24 of which rests on the base casting 1 and the upper 25 supports a pressure pad 26. The spring is adjusted by screwed spindle 27 which is mounted in the top casting 1 and carries a hand wheel 28. Instead of a simple hinge pin, a pin may be employed with an adjustable bearing consisting of conical bearing brushes surrounding the ends of the pin and bearing in conical holes in the lugs 7. In order to compensate for any resilience in the frame members or the hinge, the axes of the tubes 8, 9 and their sockets may converge slightly towards their free ends ; alternatively, either or both of the rubber rollers 3, 4 may be of slightly tapered form, with their larger diameters at the free end. Guide plates 32 for the material are disposed in each side of the roller 3 being supported from the free end of this roller by a peg 33 projecting into the shaft 14 and at the other end from the casting 1. In the modification shown in Fig. 6, the bore of the base casting 1, is lined at each end with bearing bushes 35 for ball-bearings 36 for mounting the drive shaft 14. At the end remote from the handle 15, the shaft 14 fits within, and supports, one end of the foundation cylinder 10 of the roller 3. The other end of this roller is supported by an inturned spigot 43 pinned in the upturned end 44 of a cantilever beam 45 of I cross-section which is integral with the bottom casting 1 and extends below the roller. The spigot 43 carries a ball-bearing 47 for the foundation cylinder 10. The upper flange of the beam 45 has lateral extensions which form a water trough 68 discharging to a central outlet 69. The upper roller 4 is similarly journalled in the main body of the upper casting 2 and in the down-turned end of a cantilever beam 49. A hand hole 50 may be provided in this beam. In order to fix the wringer in position, a downwardly-extending spigot 51, Fig. 1, which is rigidly mounted in the casting 1, is adapted to be inserted into the upper end of an upstanding socket 55 rigidly mounted in a clamp ; a knurled nut 52, which is retained loosely on the spigot 51, is then screwed on to the externally screw-threaded upper end of the socket 55. The clamp, which is in the form of an aluminium casting, comprises forked projections 59, 60, a rubber pad 61 on the projection 59, and a clamping screw 62. The first Provisional Specification describes also the following arrangements : (a) The replacement of the compression spring 23 by two tension springs which are arranged vertically between thimbles on the lower casting and similar thimbles on the underside of a compensating bar, which is engaged by a pressure-adjusting screw mounted in the top casting ; (b) The connection of the front end of the drive shaft 14 and the outer bearing member 16 by a square projection on the shaft fitting a corresponding recess in the bearing member and secured by a lock.nut ; (c) For clamping the wringer on the wall of a sink, two depending plate-like extensions are provided on the base casting for fitting over the wall of the sink, with a clamping screw working in one extension and rubber or fibre pads for bedding against the sides of the sink.