Patent GB-713933-A (GB)
Title: Wringer
IPC: D06F45/18
Filed: 1952-10-27
Abstract: 713,933. Wringers. LOVELL MANUFACTURING CO. Oct. 27, 1952 [Nov. 21, 1951], No. 26894/52. Class 138(2) A wringer comprises a head 18 mounted for swinging movement to any selected one of a plurality of angular index positions, a mounting for articulating a frame 3, 4, 5 to the head and including .a bracket 47 fixed to the frame, a top frame hinged (at 7) to a bracket extension 8a overlying the head 18, a safety release for means holding the top frame against upward swinging, an actuator for the safety release responsive to articulation of the frame from the centred position relative to the head. a wringer drive control having a handle 34 on the head movable to driving and neutral positions, an index pin 24 for positively locking the head in the selected index position means biasing the pin 24 out of locking position, an interlock between the drive control and the index pin forcing the pin into the locking position in the driving position, but not in the neutral position, the pin 24 being biased into a position blocking articulation of the frame in the neutral position, and a manual actuator 73 for the safety release having a part on the top frame adjacent the head accessible for manual actuation whenever the drive is in neutral and articulation is blocked. A toggle lever 9 is pivoted at 10 to the top frame 6, and at 11 to a toggle link 12 pivoted at 13 on the end frame 5. A latch 14 is pivoted at 15 and has a catch 16 co-operating with the pivot 11 to hold the toggle links 9. 12 in pressure applying position. By turning the latch 14 clockwise, the catch 16 is moved clear of the pivot 11 and a cam surface 17 co-operates with the pivot pin to push the toggle links past dead centre and release the roll pressure. A clutch 31 for controlling the roll drive is operated by an eccentric pin 32 fixed to a shaft 33 carrying the handle 34. The handle 34 is yieldably held in driving and neutral positions by a cam 41 fixed to the shaft 33 and provided with shallow notches 42, 43. Fig. 2. corresponding to the two driving positions and a deep notch 44 corresponding to the neutral position. These notches co-operate with the rounded upper end 45 of the index pin 24 which co-operates with large diameter holes 22 in an index collar 21. A dome-shaped pin 23 also co-operates with the holes 22. With the clutch in neutral position, the index pin is elevated by a spring 46 so that it does not hold the wringer in the indexed position, the pin 23 serving .to raise the wringer head sufficiently for the pin 24 to clear the hole 22. In both driving positions, however, the pin 24 is engaged by one of the shallow notches and is depressed sufficiently to prevent movement of the head from the indexed position. The bracket 47 is pivoted to the wringer head by means of screws 50, 51, and provided with-partcylindrical walls 48 (Fig. 3) telescoped within complementary side walls 49 on the head. A cam 54 pivoted at 55 on the bracket extension 8a has shoulders 56, 57 biased by a spring 61 into contact with pins 58, 59 respectively on a bracket 60 fixed to the wringer head. The pins 58. 59 project through slots 58a, 59a in the extension 8a. A shoulder 62 on cam 54 engages a flange 63 on the end of a slide link 64 pivoted to the latch 14. When the wringer frame is pivoted in either direction about the screwed pivots 50, 51, one of the pins 58 or 59 turns the cam 54 in a clockwise direction and pushes the link 64 to the right against the action of a spring 65, thereby releasing the roll pressure, Figs. 4, 5 (not shown). The mechanism on top of the wringer head is enclosed by a horseshoe shaped shroud 66 having upstanding ears 67 fastened to the extension 8a. The shroud 66 also serves to block unlocking of the index tock whenever the wringer frame is pivoted from its centred position. This is effected by a recess 69 which. in the centred position only, is aligned with a pin 70 on the upper end of a bracket 71 fixed to the pin 24. With the wringer frame in its centred position and the' clutch 31 in neutral, the pin 70 is elevated into the recess 69 and the wringer frame is. locked relative to the head. In this position force applied to the wringer frame cannot actuate the pressure release, though roll pressure -can be released by pushing inwardly the actuator 73 which is fixed to the link 64. Modification (Fig. 8). Two U-shaped arms 76, 77 on bell crank levers 78. 79 straddle a pin 74 which is fixed to the wringer head and extends through an arcuate slot 75 in the extension 8a. The bell crank levers 78, 79 are pivoted at 80, 81 respectively on the extension 8a and have arms 82. 83 projecting through slots 84, 85 in a link 64<1> for actuating the latch 14. A tension spring 65 holds the right-hand ends of the slots 84, 85 against the arms 82. 83 of the bell crank levers and the wringer frame is centred with respect to the head. When the wringer frame is pivoted in either direction one or the other of the levers 78. 79 is pivoted in a clockwise direction Figs. 9. 10, (not shown) to push the link 64' to the right and release the latch 14.