Portable battery charging and audio unit
1 Assignment
0 Petitions
Accused Products
Abstract
An audio power unit is disclosed which provides an audio output and charges removable battery packs as well as providing a number of AC receptacles for powering other tools and the like when the unit is connected to a source of AC power. The unit can optionally also provide DC power. When the unit is connected to a source of AC power, the AC power drives the audio unit which may be a radio or a combination radio and CD player and the AC source also powers a charger which recharges a battery pack if a battery pack is inserted into the charger receptacle. If the unit is not connected to a source of AC power, the radio may be powered by a battery pack when it is placed in the charger receptacle. When the unit is connected to a source of AC power, a relay is opened to isolate the radio unit from the charger and battery pack. The unit has a unique protective frame structure that is connected to the housing of the unit.
144 Citations
41 Claims
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1-21. -21. (canceled)
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22. An apparatus comprising:
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a housing having a number of walls, a top and a bottom;
a charger located in said housing for charging a removable battery pack of the type which is used to power rechargeable hand tools and other tools;
a receptacle operatively connected to said charger and being capable of receiving a removable battery pack to be charged by said charger;
a signal receiving unit including an amplifier for producing audio and/or video signals located in said housing;
a cord and plug for connecting said apparatus to a source of AC power;
a first circuit for connecting said cord to said charger and said audio unit, whereby AC power is applied to said audio unit to power the same and AC power is also applied to said charger;
a relay connected in circuit between a battery pack located in said receptacle and said audio unit;
a relay coil connected in circuit between said cord and said audio unit, said coil monitoring the presence of AC power being applied to said audio unit and causing said relay to open circuit and isolate said audio unit from said battery when AC power is applied to said audio unit and close circuit when AC power is not applied to said audio unit, thereby enabling said battery pack to power said audio unit when AC power is not applied thereto. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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Specification