Title: Self-testing battery discharge indicator

Abstract: 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.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: York, Robert A. (Mechanicsburg, PA, US)

Application Number: 536134
Filing Date: 1974-12-24
Publication_date: 1976-01-13
Assignee: Flight Systems, Inc. (Mechanicsburg, PA)
Primary Class(es): 320/136 320/DIG21, 340/636.1, 340/636.15, 340/636.16, 340/661
Other Classes:
US Patent Ref:

3568175	Mar, 1971	Schwehr	340/249.
3673588	Jun, 1972	Riff	340/249.
3852732	Dec, 1974	Yorksie et al.	320/48.

Other Refs:
Primary Examiner: Miller, J. D.
Assistant Examiner: Hickey, Robert J.
Attorney: Seidel, Gonda & Goldhammer