Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1975-12-19
1977-06-14
Jackmun, E. S.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
58 23D, 58152H, 340249, G04C 300, G08B 2100
Patent
active
040288803
ABSTRACT:
An electronic timepiece powered during use by a cell comprises an oscillating circuit for generating a high frequency output signal and a multi-stage divider circuit for receiving the high frequency output signal and dividing it at successive stages to lower frequency output signals and providing at its last stage standard pulses suitable as a time standard. A first gate circuit receives the divided signals and gates therethrough higher frequency pulses than that of the standard pulses. A control pulse generating circuit generates a given number of control pulses having a predetermined pulse width in successive predetermined periods, and a second gate circuit receives at its input both the higher frequency pulses and the control pulses and gates therethrough a number of higher frequency pulses corresponding in number to the predetermined period within the duration of the predetermined pulse width. A timing device responds to pulses applied thereto for indicating time, and a voltage detecting circuit detects the cell output voltage and provides one signal when the cell voltage is above a predetermined voltage level and another signal when the cell voltage drops below this level. A third gate circuit connected to the voltage detecting circuit responds to the one signal and gates the standard pulses to the timing device and responds to the other signal and gates the higher frequency pulses to the timing device. The timing device indicates the time in the normal manner in response to the standard pulses and in a periodic abnormal manner in response to the higher frequency pulses thereby signifying to the user that the cell is near exhaustion and needs replacement.
REFERENCES:
patent: 3898790 (1975-08-01), Takamune et al.
Adams Bruce L.
Burns Robert E.
Jackmun E. S.
Kabushiki Kaisha Daini Seikosha
Lobato Emmanuel J.
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