Abstract: A rivetting machine for use with commercial vehicle brake-shoes, the machine having a punch holder, an anvil adjustable in height relative to the punch holder, a sprung rest for a brake shoe, and mechanism for linearly, operatively moving the punch holder, the mechanism comprising a lever actuable by a first pneumatic cylinder to take up free movement between a punch in the holder and a brake shoe on the rest, and a second pneumatic cylinder which produces further movement to effect a working operation on the brake shoe, a safety device being provided, so that, if, during the free movement, the punch holder meet resistance, the holder is immediately retracted.

Abstract: A jig for use in grinding brake shoe linings of brake shoes having pivot means at one end which engage respective spaced pivot pins in the brake drum, the jig comprising a turntable, having central swivel means, mounting means on the turntable, means for radially adjusting the mounting means relative to the swivel means, a pair of pivot pins in fixed spaced relationship and provided on the mounting means, each said pin engaging, in use, with the pivot means of one of the brake shoe linings to be ground, angle setting means on the turntable and diametrically opposite said mounting means, said angle setting means defining a variable dimensions abutment whereby the ends of the brake shoes opposite to said mounting means abut opposite sides of the abutment, whereby, the brake shoe linings can be positioned substantially on the circumference they occupy in a brake drum by adjustment of the mounting means and setting of the angle setting means.

Abstract: Apparatus for controlling the depth of material laid on a web and comprising a head for laying the material, an arrangement for continuously moving the web past the head, first and second members defining an extrusion gap for receiving the web, and a control device arranged to effect movement of one member relative to the other to vary the size of the gap, the control device comprising a fluid-pressure operated piston and cylinder unit including a plurality of relatively movable cylinders and pistons individually extensible and retractable to vary the length of the unit, and a switching arrangement for individually operating the cylinders.