초록 ▼

A fuel time indicator which is removably mountable about a fuel tank selector switch for monitoring and displaying tank usage times for each of a plurality of fuel tanks is disclosed. The fuel time indicator comprises a portable frame including a switch position sensor for monitoring a plurality of

A fuel time indicator which is removably mountable about a fuel tank selector switch for monitoring and displaying tank usage times for each of a plurality of fuel tanks is disclosed. The fuel time indicator comprises a portable frame including a switch position sensor for monitoring a plurality of positions of the fuel selector switch and generating a corresponding switch position signal. A timer generates a timing signal indicative of elapsed time. A controller responsive to the position signal and the timing signal generates tank usage times for each of the fuel tanks by selectively aggregating elapsed times. Visual indications of the tank usage times are provided by a display.

대표청구항 ▼

[ What is claimed is:] [1.] A method of indicating utilization time for a fuel tank comprising the steps of:positioning a photosensor adjacent a manually actuatable selector switch having a first position which enables withdrawal of fuel from said tank and a second position which prevents withdrawal

[ What is claimed is:] [1.] A method of indicating utilization time for a fuel tank comprising the steps of:positioning a photosensor adjacent a manually actuatable selector switch having a first position which enables withdrawal of fuel from said tank and a second position which prevents withdrawal of fuel therefrom;causing said photosensor to generate a position signal which undergoes a first change of state when said selector switch is moved from said second position to said first position and which undergoes a second change of state when said selector switch is moved from said first position to said second position;measuring an elapsed time between an occurrence of said first change of state and an occurrence of said second change of state;storing said elapsed time;repeating aforesaid steps;determining a time of utilization by summing values of elapsed time which have been generated and stored as aforesaid; andgenerating a visual display of said time of utilization.