Abstract: A flame-retardant polyamide composition comprising 98 to 60% by weight of a polyamide and, uniformly dispersed therein, 2 to 40% by weight of melamine cyanurate, characterized in that nearly 100% of the latter particles have a particle size of at most 35.mu. and at least 80% by weight of the particles have a particle size of at most 10.mu.; and a process for producing said composition.

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.