Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 4055789 | Battery-operated motor with back EMF charging An energy conserving electrical apparatus for driving a load and recovering otherwise wasted electrical energy utilizes an electric motor with field windings on one or more pole members and one or more rotors. During a first time interval whose duration i... | 10/25/1977 |
| 3996064 | Electrically rechargeable REDOX flow cell There is disclosed a bulk energy storage system including an electrically rechargeable reduction-oxidation (REDOX) cell divided into two compartments by a membrane, each compartment containing an electrode. An anode fluid is directed through the first com... | 12/07/1976 |
| 3968417 | Clock-radio with automatically selected battery power A clock radio including, within the housing for the clock radio, a relay coil connected across a line cord for the clock radio, normally open relay contacts connected for passing power to the clock radio from the line cord and normally closed relay contac... | 07/06/1976 |
| 3967180 | Power supply system for extraction machine, especially a drum-cutting machine Low voltage direct current power is provided on a mining machine that is supplied with high voltage alternating current by an external power cable. An intrinsically-safe battery is charged by a battery charger that is powered through a stepdown transforme... | 06/29/1976 |
| 3963972 | Portable power package A portable power package has a supporting box provided with a cavity arranged for receiving an electrical battery such as a conventional storage battery. Pairs of jacks and switches are mounted on the box in series with the battery and in parallel with on... | 06/15/1976 |
| 3947744 | Electric truck having elevated load potential energy recovery with means to adjust rate of carriage descent A lift truck energized from a battery to supply pressurized fluid to elevate a load-supporting carriage has an energy recovery system for converting kinetic energy of the elevated carriage into battery charging current including a fluid motor through whic... | 03/30/1976 |
| 3947743 | Electric charger There is described a charger and related devices, the charger being capable of charging batteries uniformly to a predetermined level by adjusting the residual electric amounts in the respective batteries to a uniform level prior to the charging operation,... | 03/30/1976 |
