Automatic safety and alarming apparatus for construction equipments

Claim 1

An automatic safety and alarm apparatus for construction equipment comprising a plurality of sensors provided for an engine and various auxiliary devices which are mounted on said equipment for detecting the abnormal condition of said engine and said auxilliary devices, a plurality of abnormal condition display circuits respectively connected to receive the abnormal signals produced by respective sensors for independently displaying said abnormal conditions, a logical sum circuit connected to receive abnormal signals from the abnormal condition display circuit, an abnormal condition alarming circuit including an audible alarm and a visible alarm and connected to receive the output from said logical sum circuit for alarming and displaying any one of said abnormal conditions, a delay circuit connected to receive the output of a sensor provided for the engine, and a deceleration mechanism operated by the output from said delay circuit for decreasing the speed of the engine or stopping the same when an abnormal condition occurs in the engine, said deceleration mechanism comprising an electromagnetic solenoid energized by the output from said delay circuit, a first cam interlocked with an acceleration pedal, a second cam interlocked with a throttle lever of said engine, and a means responsive to the energization of said electromagnetic solenoid for coupling and decoupling said first and second cams from each other.