Patent ID: RE40027

Claim:
Battery-powered apparatus for holding and energizing an electric transducer producing an output from a battery current, comprising in combination: a transducer mount; a hand-held battery housing carrying the transducer mount; a first internal battery terminal contact at the transducer mount; a second internal battery terminal contact remote from the transducer mount; a first eternal battery charge terminal on the transducer mount; a second external battery charge terminal on a part of the battery housing; a double-throw switch having a common element electrically connected to one of the first and second internal battery terminal contacts, having a first switched contact leading to a first terminal of the electric transducer, and having an opposite second switched contact electrically connected to one of the first and second external battery charge terminals; an actuator for said switch including one of said transducer mount and said part of the battery housing movable relatively to each other; and current-conducting paths between the other of the first and second internal battery terminal contacts and the other of the first and second external battery charge terminals and a second terminal of the electric transducer.