Patent GB-869043-A (GB)
Title: Improvements in and relating to dyeing and analogous machines
Inventor: FREEMAN SAMUEL RICHARD THOMPSO
IPC: D06B5/00
Filed: 1959-02-12
Abstract: A wet treatment machine of the kind comprising an outer vat or tank containing liquor, a withdrawable cage and a lid to the vat or tank such that the latter may be sealed is characterized by the provision of a valve and lid-locking means so interconnected that whenever the locking means are actuated to release the lid, the valve is opened automatically, preferably just prior to the release of the lid.  As shown in Figs. 1 and 2, lid 2 may be clamped down by means of pivoted catches 5, the forked upper ends 5a of which are screw-threaded to receive a tapped cubiform block 6 secured by means of nuts 7, 8. Extending laterally from opposite sides of the block 6 are axially aligned trunnions 9 (Fig. 3) which seat in vertical recesses 10 formed in suitably spaced side plates 11, of a bracket 12 secured upon the top of lid 2.  Screws 13 attach bearing plates 14 to the outer sides of plates 11.  Welded upon the outer faces of filling-in plates 15, attached to the upper portions of the opposite sides of tank 1 are vertical channels 16, adapted to co-operate with feet 5b of pivot catches 5.  Forked upper ends 5a may be connected by links 18 to a "bell-crank" plate 19 pivotally mounted at 20 and arranged to turn in a horizontal plane.  Projecting upwardly from the apex of each plate 19 is a vertical pin 22 adapted to turn the plate against the action of a controlling spring 21 by a contact piece fixed on shaft 24.  A hand wheel 29 may control through connexions axial displacement of shaft 24.  By turning wheel 29 so as to effect movement of shaft 24 to the right, the two contact pieces will be caused to act upon pins 22 thereby <PICT:0869043/IV(c)/1> <PICT:0869043/IV(c)/2> <PICT:0869043/IV(c)/3> <PICT:0869043/IV(c)/4> <PICT:0869043/IV(c)/5> turning plates 19 against the action of springs 21 to effect simultaneous disengagement of all four pivoted catches 5. Conversely, rotation of the hand wheel 29 in the opposite direction will shift the shaft 24 to the left and move the contact pieces clear of pins 22 with the result that the springs 21 will react to restore plates 19 to their original positions and through links 18 swing catches 5 to lock lid 2.  Mechanism is provided on top of the lid for automatically opening valve 35 by lifting it off its seat against the downward pull of a tension spring whenever the shaft is shifted axially to release the lid.  As shown in Figs. 7 and 8 arms 42a and 42b of lever 42 may be rigidly secured to opposite ends of shaft 43 itself mounted to turn freely in bushes 44 secured within a bearing tube 45.  Outer end of arm 42a may be pivotally connected by pin 47 to lug 48 and the corresponding end of arm 42b may be furnished with roller 49 arranged to be acted upon by a longitudinally extending straight cam 50 attached to shaft 24. Whenever shaft 24 is shifted axially to the right in Fig. 7 to release the lid, the roller 49 rides up an inclined leading end 50a of cam 50 with the result that lever 42 is turned upwardly to raise valve 35 off its seat.  In a modification (not shown) means may also be provided to release valve 35 manually even when the lid is locked.