Optics: image projectors – Pointer
Patent
1997-01-13
1998-07-28
Dowling, William
Optics: image projectors
Pointer
353 15, G03B 2114
Patent
active
057854033
ABSTRACT:
A portable audio-visual apparatus includes: a casing having a tilting surface formed on an upper portion of the casing adjacent to a jack for inserting a right-angle plug of a microphone having a cable connectable between the microphone and the plug for outwardly transmitting radio-frequency sound waves to be received by a receiver and amplifier, with at least a volume switch provided on the casing for a direct convenient volume adjustment on the casing of the wireless microphone; and a laser point indicator secured in the casing opposite to the jack of the casing for emitting a laser light point for an optical point indication on a screen as displayed by a projector, whereby upon winding the cable of the microphone when not in use, the cable adjacent to the microphone will be smoothly rested on the tilting surface of the casing without bending, twisting, breaking and damaging the cable and the microphone.
REFERENCES:
patent: 4291954 (1981-09-01), Wilson
patent: 4306782 (1981-12-01), Sobotta
patent: 5408284 (1995-04-01), Berger et al.
patent: 5718496 (1998-02-01), Feldman et al.
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