公开(公告)号：US3576488A

公开(公告)日：1971-04-27

申请号：US3576488D

申请日：1968-06-25

Applicant: ESB INC

Inventor： ZUG WILHELM J ,  RIGGS HAROLD C

IPC: G01R19/165 ,  G01R31/36 ,  H02J9/00 ,  H02J7/00

CPC classification number: H02J9/002 ,  G01R19/16542

Abstract: A battery discharge indicator which is particularly adapted for monitoring the terminal voltage of a battery supplying power for a battery-operated industrial truck. The indicator is operative to provide a warning signal when the voltage of the battery falls below a given value and includes timing and switching means which, if the battery is not recharged within a predetermined period of time is operative to prevent the truck from doing any work other than travelling thereby reserving the power remaining in the battery for the return of the truck to the charging station.