Abstract: Alarm apparatus is provided for a recirculating exhaust gas flow control device, which device is employed in an internal combustion engine responsive to the negative pressure induced in the carburetor of the engine for controlling the flow of exhaust gas that is recirculated into the fuel-air mixture to be sucked into the engine; the device has a high pressure chamber in communication with the atmosphere, a low pressure chamber in communication with the engine negative intake pressure, and a diaphragm between the chambers for driving a valve that controls the flow of recirculating exhaust gas. The alarm apparatus employs a diaphragm forming high and low pressure chambers and for driving an actuating rod of a control circuit having an alarm signal lamp.

Abstract: The invention relates to an injection moulding machine having an injection unit with a nozzle which is laterally adjustable relatively to a mould opening. The adjustment is provided by one or both of the facilities consisting of:A. Rotatable eccentric means disposed between the injection unit and the support fixed relatively to the mould, andB. Lockable couplings between two rods, which extend substantially parallel to the axis of the injection unit and on which the injection unit is mounted, and a part fixed relatively to the mould.

Abstract: The angular configuration of a fluid control surface, with respect to the relative direction of fluid flow, is controlled by selectively heating the structural portions of only one side of the control surface to expand the structural members on the one side with respect to the structural members on the other side for warping the control surface generally from its leading to its trailing edge. Particularly, the camber of an airplane wing is changed by this selective heating for controlling the wing portion lift. Preferably, wires extend generally from the leading edge to the trailing edge of the wing as wing structural members closely adjacent the upper and lower surfaces of the wing, with both sets of wires being prestressed to provide an intermediate camber for the wing portion when the upper and lower wires are the same temperature, a generally symmetrical wing configuration when only the lower wires are heated, and a high lift maximum camber when only the upper wires are heated.