Automatic protective circuit system for emergency lights
First Claim
1. An automatic protective circuit system for emergency lights of the type having a casing body, a left light and a right light separately provided on the top of the casing body, and a storage battery installed therein comprising:
- a power supply means for being connected to the external power source;
a charging means connected to said power supply means for effecting charging operations;
an upper-limit charging control means coupled with said charging means for automatically stopping the charging operation thereof;
a lower-limit charging control means coupled with said charging means for automatically starting the charging operation thereof;
a lower-limit discharging control means for maintaining a selected power level in the storage battery, a normally-closed contact and a normally-open contact connecting said means with the battery and connecting said means with the lights;
a discharge actuating means for causing said battery to discharge on failure of said power supply means, said means being connected between said power supply means and said lower-limit discharging control means;
whereby, the storage battery of the emergency light can be effectively protected from being overcharged and overdischarged.
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Accused Products
Abstract
An automatic protective circuit system for emergency lights includes in combination: a power supply circuit for being coupled with the external power source; a charging circuit connected to the power supply circuit; an upper-limit charging control circuit matched with a lower-limit charging control circuit respectively coupled with the charging circuit and the storage battery; a lower-limit discharging control circuit matched with a pair of double-pole switches and a push-button switch connected to the storage battery and the lights; and a discharge actuating circuit coupled between the power supply circuit and the lower-limit discharging control circuit; thereby, the storage battery of the emergency lights can be effectively protected from being overcharged and overdischarged for extending the life span of the emergency lights.
32 Citations
7 Claims
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1. An automatic protective circuit system for emergency lights of the type having a casing body, a left light and a right light separately provided on the top of the casing body, and a storage battery installed therein comprising:
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a power supply means for being connected to the external power source; a charging means connected to said power supply means for effecting charging operations; an upper-limit charging control means coupled with said charging means for automatically stopping the charging operation thereof; a lower-limit charging control means coupled with said charging means for automatically starting the charging operation thereof; a lower-limit discharging control means for maintaining a selected power level in the storage battery, a normally-closed contact and a normally-open contact connecting said means with the battery and connecting said means with the lights; a discharge actuating means for causing said battery to discharge on failure of said power supply means, said means being connected between said power supply means and said lower-limit discharging control means;
whereby, the storage battery of the emergency light can be effectively protected from being overcharged and overdischarged. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification