Illumination – Self powered lamp – With movable focusing element
Reexamination Certificate
1999-04-28
2001-01-16
O'Shea, Sandra (Department: 2875)
Illumination
Self powered lamp
With movable focusing element
C362S280000, C362S188000, C362S293000, C362S319000, C362S322000, C362S202000, C362S208000, C362S174000, C362S167000
Reexamination Certificate
active
06174071
ABSTRACT:
BACKGROUND OF THE INVENTION
It is known for a flashlight to have a reflector for light focus and a filter for changing the color of light. It is necessary for the reflector and filter to be movable for operation. As separate means are invariably required to move the reflector and filter, use is inconvenient.
The invention seeks to mitigate or to at least alleviate such a problem by providing an improved flashlight.
SUMMARY OF THE INVENTION
According to the invention, there is provided a flashlight comprising a elongate body having a longitudinal axis and a front end and providing a compartment for containing a battery cell; a head assembly connected to the body front end and comprising a light bulb, a reflector movable between an inner position behind the light bulb and an outer position surrounding the light bulb for light focusing, and a colored filter movable between an inner position behind the light bulb and an outer position surrounding the light bulb for light color changing; and a unitary manual operating mechanism for initially moving the filter from the inner to the outer position and subsequently moving the reflector from the inner to the outer position.
Preferably, the operating mechanism comprises a manual operating member on the head assembly, which is angularly movable about the axis of the body for operation.
More preferably, the operating member is in the form of a ring disposed around the head assembly.
In a preferred embodiment, the operating mechanism includes a cam provided between the operating member and the filter and reflector to enable the operating member to move the filter and reflector
More preferably, the cam comprises a first cam track co-acting with the filter and a second cam track co-acting with the reflector.
Further more preferably, each of the first and second cam tracks has a transverse section and an inclined section towards the transverse section of the other cam track.
It is further preferred that the two transverse sections overlap with each other over a certain length, with their adjoining inclined sections extending apart in opposite directions.
In a preferred arrangement, the head assembly has an internal slot extending parallel to the axis of the body, and the filter and reflector have individual parts in sliding engagement with the respective cam tracks through the slot.
Preferably, the operating mechanism includes a pair of said cams provided on diametrically opposite sides of the axis of the body, with their respective cam tracks together extending substantially around the axis of the body.
It is preferred that the or each cam is substantially semi-cylindrical.
In a preferred embodiment, the head assembly includes a protruding cap lens, in which the light bulb, the reflector and the filter are provided.
REFERENCES:
patent: 5749645 (1998-05-01), Maglica
patent: 5765937 (1998-06-01), Shiau
patent: 5816688 (1998-10-01), Shui-Shang
patent: 5826971 (1998-10-01), Kibler
patent: 5848835 (1998-12-01), Cook
patent: 5865525 (1999-02-01), Kibler et al.
patent: 6004008 (1999-12-01), Lai
patent: 6082876 (2000-07-01), Hanson et al.
patent: 6086218 (2000-07-01), Robertson
Leydig , Voit & Mayer, Ltd.
O'Shea Sandra
Ton Anabel M.
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