Chemistry: electrical current producing apparatus – product – and – Cell support for removable cell – Having switch or interlock means
Patent
1995-01-03
1997-05-13
Kalafut, Stephen
Chemistry: electrical current producing apparatus, product, and
Cell support for removable cell
Having switch or interlock means
200 60, 200 5004, 362183, 362184, 362194, 362205, 362206, H01M 210, F21L 700, H01R 1900
Patent
active
056291051
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The subject inventions relate to flashlights and other battery-powered apparatus for holding and energizing electric transducers.
BACKGROUND
Battery-Powered apparatus for holding and energizing one or more electric transducers are well known and include flashlights, laser pointers, and electrically powered tools, to name a few examples.
Prior-art apparatus with rechargeable batteries for powering one or more electric light sources or other transducers either exposed transducers to battery charging currents, especially if the user accidentally turned on a transducer energizing switch, or imposed charging current limitations by charging the batteries through a flashlight filament or other active electric transducer part, or required the provision of special isolated electrodes, wires and the like for feeding battery charging currents through apparatus parts, or exposed battery chargers to shorting through faulty positioning of switches on the apparatus, or had two or more of such drawbacks.
There also is a need for improved switching equipment that can handle selective switching of transducer energizing circuits and of battery charging circuits in battery powered apparatus, and that can perform other switching functions.
There similarly is a need for improved switching equipment that can handle selective energization of at least two electric transducers or other loads.
Especially hand-held light sources with two filaments or lamps typically will produce a well-focused narrow beam from one filament and a very poorly focused irregular beam with dark rings and spots from the other filament, whereas the need is to produce not only a well-focused narrow beam from the higher power lamp, but also a well-focused broad beam 15 from the lower powered lamp.
There also is a need for improved transducer mounts or housings in battery-powered apparatus.
With prior-art flashlights, it is often difficult to retain a well-focused light output when a light source is replaced. Also prior-art flashlights often are impaired by a deteriorating performance because of progressively corroding switch contacts and battery terminal contacts.
DISCLOSURE OF INVENTIONS
It is an object of one of the inventions herein disclosed and claimed to provide improved rechargeable battery-powered apparatus for holding and energizing at least one electric transducer, wherein any transducer is isolated from battery chargers and charging currents, whereby transducers are protected and charging current limitations imposed by transducers are avoided, and wherein battery charging currents are led through parts of the apparatus without the need of any electrodes, wires and the like that would have to be electrically insulated from the apparatus part through which the particular electrode or wire proceeds.
According to one of the inventions herein disclosed, that object is met by 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 external 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 that switch including one of (a) the transducer mount and (b) the above-mentioned 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
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Kalafut Stephen
Laser Products Corporation
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