Abstract: A grit elevator (30) including a plurality of solid screens (104) in the form of a rotatable endless belt, one or more grit collectors (116) on the interior of the endless belt, and a grit inlet (172) leading to the interior of the endless belt.

Abstract: A container (20) having an opening, a lid (10) pivotally mounted on the container (2) and movable to open and close the opening, a lid latch assembly (100) mounted on the lid (8), the lid latch assembly (100) and container (2) having cooperating engagement portions by which the lid (10) can be held while the opening in the container (2) is closed, the lid latch assembly (100) having a handle (114) by which the lid (10) can be manually pivoted to engage the cooperating engagement portions whilst storing energy in a spring (126) in the lid latch assembly (100), the handle (114) being manually moveable to cause the cooperating engagement portions to disengage and so allow the lid (10) to move to open the opening and an electrical solenoid (121) which can be activated to cause the cooperating engagement means to disengage under the action of the spring (126) in which energy was stored on closing the lid (10).

Abstract: A rotary disintegrator for liquid-borne solid waste, for example, has a cutter head (14) in which a rotatable headstock having cutting blades (28, 30) is urged by springs (38) against a shear plate (15). A signalling means for signalling predetermined wear of the shear plate (15) by the cutting blades (28, 30) includes a wear detector (65) having a rod electrode (67) mounted by an insulating plug (72) within a bore (74) in the shear plate (15). When the plug (72) is worn by the cutting blades to expose the electrode (67) the electrical circuit of the signalling means is completed thus providing an indication that a predetermined degree of wear of the shear plate (15) has occurred.

Abstract: An apparatus for separating solids from liquids including an endless rotatably mounted band of collecting arms for collecting screened solid material, each of the collecting arms having a leading collecting face and two opposite sides adjacent the leading collecting face, and being mounted on support rods which are arranged in spaced relationship around the band, link pieces rigidly attached to the collecting arms for linking one support rod to the next, such that the link pieces form continuous chains around the band, and separate the collecting arms one from the other to form slots between the link pieces, said link pieces being rotatable on the support rods to which they are attached, and a rotatable set of discharging teeth arranged to cooperate with said movable band by entering the slots as the band rotates to move along the leading collecting faces of the collecting arms, thereby to remove collected material gathered at the slots and from said leading collecting faces of the collecting arms.