Recharging spot/flood lantern
US4605993A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1984 |
| Grant date | Aug 12, 1986 |
| Priority date | — |
| Expiry date | Dec 19, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S9/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A battery operated lamp and battery charger are disclosed. The lamp is equipped with a rechargeable battery and a battery charger stand. The lamp has a lamp support surface with a center terminal, and a second terminal spaced from the center which engages the center terminal and second terminal respectively on the lamp. Thus the two lamp terminals will engage the two respective charge terminals regardless of the position of orientation in which the lamp is placed on the charger. The charger circuit is powered from a power cord connected to a power line through a transformer a full wave rectifier to charging lines. These diodes and a switch are connected in parallel with two diodes. The lamp battery to be charged is connected in parallel with the charging lines. Thus, with the switch closed, the charging voltage is reduced to desired value by a voltage drop caused by the resistor and the three diodes in parallel with the battery. When the battery plates have become "sulfated" due to a complete discharge of the battery, the switch may be opened to give a higher "restore" voltage. A (LED) pilot light is connected through a resistor in parallel with the charging circuit. The pilot ligh…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.