Abstract: A method and apparatus for controlling an air conditioner having a motor-driven blower for creating air flow through an air passage which opens into a compartment through a plurality of outlets. The rate of air flow through the air passage is changed with a change of the number of outlet or outlets to be open, so as to avoid an undesirable air blowing rate caused by a change of resistance to air flow through the air passage.

Abstract: The blower of an automotive air conditioning unit is energized according to a flexible schedule wherein the maximum and minimum voltages applied to the blower motor are varied in response to a plurality of sensed parameters which influence the environment controlled by the air conditioning unit so that during extremely hot and cold weather suitably powerful energization is realized while during milder weather the energization is limited to avoid unnecessary noise generation.

Abstract: A centralized alarm sytem for warning of abnormalities in a plurality of components, in particular, for a vehicle, comprising, a plurality of sensors, each associated with a component for producing an abnormality signal when the associated component becomes abnormal, a control circuit connected to each of the sensors for producing a main indication signal when any one of the sensors produces an abnormality signal and for producing a local indication signal for each sensor producing an abnormality signal, and a plurality of local indicators, each associated with one of the sensors and connected to the control circuit being capable of producing a perceptable indication when an associated one of the sensors produces an abnormality signal.

Abstract: An automobile fuel gauge system comprises a main sensor unit for a main indicating system being provided in a fuel tank, a small chamber with top open fixedly provided at the bottom of the fuel tank and having at its lower side a hole for fuel passage, and an auxiliary sensor unit for an auxiliary indicating system provided in said chamber. The system includes a main dial section and an auxiliary dial section for performing indications according to electric signals transmitted from said main and auxiliary sensor units, respectively, and said auxiliary sensor unit is adapted to operate only when fuel in the fuel tank is running short.