초록 ▼

A solid state digital and analog circuit which is connected between a two-way radio, public address system etc. and the battery in a police car, emergency vehicle, tow truck or fire truck to prevent the same from inadvertently draining all the power from the battery when the vehicle is left unattend

A solid state digital and analog circuit which is connected between a two-way radio, public address system etc. and the battery in a police car, emergency vehicle, tow truck or fire truck to prevent the same from inadvertently draining all the power from the battery when the vehicle is left unattended for long periods of time. When the ignition is turned off, a timer in the circuit begins counting and after a prescribed amount of time, e.g. between one and twelve hours, a relay disconnects the auxiliary equipment from high current of the battery. When the ignition is turned on the circuit immediately re-connects the auxiliary equipment and the battery.

대표청구항 ▼

A system for automatically disconnecting a radio and/or other auxiliary equipment in a vehicle from its battery to prevent it from going dead when the vehicle is left unattended for a substantial period of time, comprising: means for providing a power down signal representative of an ignition system

A system for automatically disconnecting a radio and/or other auxiliary equipment in a vehicle from its battery to prevent it from going dead when the vehicle is left unattended for a substantial period of time, comprising: means for providing a power down signal representative of an ignition system of the vehicle being turned off; means for providing a power up signal representative of the ignition system being turned on; counter means responsive to the power down signal for determining when a predetermined amount of time has elapsed from the occurrence of the power down signal; means for adjusting the predetermined amount of time; relay means for connecting and disconnecting the battery and auxiliary equipment; driver means responsive to the counter means for actuating the relay to disconnect the battery from the auxiliary equipment when the predetermined amount of time has elapsed; and means for causing the driver means to reconnect the battery to the auxiliary equipment in response to the power up signal.