Title:
SELECTIVE RADIO CALL RECEIVER
Document Type and Number:
Japanese Patent JP2978602
Kind Code:
B2
Abstract:
PURPOSE: To detect the voltage of a battery and to raise an alarm even when the power source is turned off.
CONSTITUTION: This device is equipped with a power source on/off recognition part 111 to recognize the on/off state of the power source, comparing means 114 to compare time from a timer function part 104 with detection timing time 113 set in advance, battery voltage detecting means 115 to detect the battery voltage when both the kinds of the time are coincident and to compare the detected voltage with a rated voltage, timer function part 118 to set time for detecting this battery voltage, and driving control part 116 to raise the alarm when the battery voltage detecting means 115 detects that the battery voltage is lower than the rated voltage. The comparing means, battery voltage detecting means and alarming means are operated when it is recognized that the power source is turned off.
Inventors:
SAKAGUCHI MAMORU
KURAMATSU HIROYASU
KURAMATSU HIROYASU
Application Number:
JP21475291A
Publication Date:
November 15, 1999
Filing Date:
July 31, 1991
Export Citation:
Assignee:
NIPPON DENKI KK
NIPPON DENKI IDO TSUSHIN KK
NIPPON DENKI IDO TSUSHIN KK
International Classes:
H04W88/02; H04B7/26; H04W84/02; (IPC1-7): H04Q7/14
Domestic Patent References:
| JP2154539A | ||||
| JP262852U | ||||
| JP425338U | ||||
| JP419842U |
Attorney, Agent or Firm:
Suzuki Akio
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