Low battery indicator
AssigneeLifeline Systems, Inc.
InventorsTheodore Bially, Marc W. Ditz
Life of this patent
Estimating the term…
Abstract
An emergency response system in which the low battery condition of a wireless help unit is automatically detected and indicated at a receiver. The help unit provides, as part of the transmitted signal, a signal indication of battery condition. The received signal is decoded and, upon detection of a low battery signal indication, a visual and/or audible output indication denotes this condition. The low battery indication at the receiver remains on until a transmission is received from the help unit when containing a fresh battery replacement.
Claims9
An emergency response system comprising:
- a help unit for transmitting a signal to a receiver in response to manual actuation of the unit, the signal containing data identifying the unit and data signifying the condition of the unit battery;
- a receiver including:
- means for receiving the signal transmitted from the help unit to set timer means upon detection of a valid code from the help unit;
- timer means providing an output signal defining a reset interval;
- an indicator operative in response to the output signal from the timer means operative to signify the reset interval;
- latch means providing an output signal to an indicator which provides an output indication of low battery condition;
- means operative in response to the received signal from the help unit to set the latch means upon detection of low battery data in the received signal;
- output means triggered upon the cessation of the output signal from the timer means to cause an emergency signal;
- and
- means for resetting the timer means during the reset interval, the low battery latch means remaining latched until receipt of a transmitted signal from the help unit containing no low battery data.
An emergency system comprising:
- a help unit for transmitting a signal to a receiver in response to manual actuation of the unit, the signal containing data identifying the unit and data signifying the condition of the unit battery;
- a receiver including:
- first means operative upon receipt of the signal transmitted from the help unit to provide a reset interval upon detection of a valid code from the help unit;
- indicator means providing an output indication of low battery condition;
- second means operative in response to the received signal from the help unit to energize the indicator means upon detected of low battery data in the received signal;
- output means operative upon termination of the reset interval to cause an emergency output;
- and
- means for resetting the first means during the reset interval, the second means remaining operative to energize the indicator means until a transmitted signal from the help unit is received signifying a fresh battery.
For use in an emergency response system in which a wireless help unit transmits a signal to a receiver for initiating an emergency signal after a predetermined time interval, means in the receiver for denoting a low battery condition for a battery in the help unit, said means comprising:
- means for deriving from the signal transmitted by the help unit data signifying the condition of the battery;
- means operative upon detection of low battery data to provide an output indication of low battery condition;
- means for resetting said operative means only after receipt of a signal from the help unit containing data signifying a fresh battery.
Dependencies are inferred from the claim text.