Abstract: The present invention is directed to a wheel condition detection and signalling device. The device includes a chamber which is capable of being attached to a wheel of a truck to rotate therewith and a pendulum having significant mass and is rotatably mounted within the chamber in such a manner that the pendulum remains generally non-rotating during rotation of the chamber. The device also includes a detector means for detecting an unacceptable condition of the wheel and emitting a signal dependent upon such condition and a transmitter for transmitting that signal to a receiver. The chamber carries a wire coil which is mounted on a core having two outside parallel arms provided with end faces.

Abstract: Apparatus for controlling a load connected to an internal combustion engine during operation is disclosed and claimed. The apparatus comprises a suction switch (12) which is sensitive to a decrease in vacuum in the manifold (16) of the vehicle when more motive power is required. The switch (16) causes a controller (30), at terminal (44) thereof, to provide a voltage higher than a predetermined set voltage at the D+ terminal of a conventional regulator (46), thereby to interrupt current flow in the excitation circuit of a conventional alternator (48). The alternator is consequently switched off to reduce the load connected to the engine, thereby to make more engine power available to the drive wheels of the vehicle. The apparatus thus also serves as a fuel saving device.