초록 ▼

The voltage of a battery connected to a load is automatically indicated with respect to two voltage levels. A first indicating means indicates that the battery voltage is greater than a first voltage level, and a second indicating means indicates that the battery voltage is less than the first volta

The voltage of a battery connected to a load is automatically indicated with respect to two voltage levels. A first indicating means indicates that the battery voltage is greater than a first voltage level, and a second indicating means indicates that the battery voltage is less than the first voltage level but greater than a second voltage level. A third indicating means indicates that the battery voltage is less than both the first and second voltage levels and disables the load connected to the battery. Means are provided for selectively generating a control signal either in response to the battery voltage or at a decay rate independent of the battery voltage. In a normal operating mode, the control signal is determined by the actual decay rate of the battery voltage whereas, in a self-test mode, the control signal decays at a fixed decay rate independent of the actual battery voltage. The first, second and third indicating means operate in response to the control signal.

대표청구항 ▼

Apparatus for indicating the voltage of a battery and for disabling a load connected to the battery, comprising: first indicating means for indicating that the battery voltage is greater than a first voltage level; second indicating means for indicating that the battery voltage is less than said fir

Apparatus for indicating the voltage of a battery and for disabling a load connected to the battery, comprising: first indicating means for indicating that the battery voltage is greater than a first voltage level; second indicating means for indicating that the battery voltage is less than said first voltage level but greater than a second voltage level, said second indicating means being electrically connected to said first indicating means so that when said first indicating means is energized said second energizing means is not, and when said second indicating means is energized said first indicating means is not; third indicating means for disabling said load when the battery voltage is less than said first and second voltage levels and for indicating that the battery is less than said first and second voltage levels, said third indicating means being electrically connected to said first and second indicating means so that when either of said first and second indicating means are energized said third indicating means is not, and when said third indicating means is energized said first and second indicating means are not; means for selectively energizing said first, second and third indicating means in response to first and second contRol signals; means for sensing that the battery voltage is greater than said first voltage level, less than said first voltage level but greater than said second voltage level, and less than said first and second voltage levels and for generating said first and second control signals in response to a third control signal, said sensing means being electrically connected to said selectively energizing means; and means for selectively generating said third control signal either at a fixed decay rate independent of the actual battery voltage or in response to the actual battery voltage, said generating means being electrically connected to said sensing means.