Brick cutters

A first brick cutter comprises two opposing jaws 456 and 460 supported by a frame 402. A first jaw 456 is mounted on one arm of a lever 432 which is pivotally attached to the frame 402. A threaded member 440 is screwed through the other arm of the lever and engages the frame 402. Rotation of the threaded member 440 pivots the lever 432 whereby the first jaw 456 is urged towards the second 460. A second brick cutter (Fig.17) comprises a hydraulic ram which has a manually actuated piston (322, Fig. 17) and a cutting jaw supporting piston (428, Fig. 17). Movement of the actuated piston (322, Fig.17), which has a smaller cross-sectional area than the supporting piston (428, Fig.17), applies force to the supporting piston (428, Fig.17). A third brick cutter (Fig. 1) comprises opposing jaws (12 and 14, Fig. 1), two upstanding threaded members (16 and 18, Fig. 1) and respective nuts (20, Fig. 1). One of the jaws (14, Fig. 1) is mounted on a support having two open bores (34 and 36, Fig. 1) through which a respective threaded member (16 and 18, Fig. 1) projects. A brick (8, Fig. 1) is located between the jaws (12 and 14, Fig. 1) and force is applied thereto by rotating the nuts (20, Fig. 1) on their respective threaded members (16 and 18, Fig. 1). In a fourth brick cutter (Fig. 7) a threaded member is connected to one of the jaws (104, Fig. 7).