Light-beam-projecting apparatus

Claim 2

Electro-mechanical apparatus for changeably directing the projection axis of a reflected light beam to create thereby, on a remote surface, infinitely varying light-impingement patterns which are related to a variable-frequency electrical signal, said apparatus comprising a light-beam producer, a reflector positioned to reflect a beam produced by said producer, an oscillatable element, means for producing oscillation of said element at frequencies related to those of said signal, a first leg having one resonant frequency, interconnecting said element and said reflector, for producing in the latter, in response to movements occurring in the former, oscillatory rocking motion which occurs about a first axis, a second leg having a resonant frequency, different from that of said first leg, also interconnecting said element and said reflector, for producing in the latter, in response to movements occurring in the former, oscillatory rocking motion which occurs about a second axis angularly offset from said first axis, and a third leg angularly offset from said first and second legs, interconnecting said element and said reflector for supporting the latter in cooperation with said first and second legs.

Claim 3

Electro-mechanical apparatus for changeably directing the projection axis of a reflected light beam to create thereby, on a remote surface, infinitely varying light-impingement patterns which are related to a variable-frequency electrical signal, said apparatus comprising a light-beam producer, a reflector positioned to reflect a beam produced by said producer, an oscillatable element, means for producing oscillation of said element at frequencies related to those of said signal, a first pair of opposed, outwardly curved legs, each leg having a length operatively interconnecting said element and said reflector, for producing in the latter, in response to movements occurring in the former, oscillatory rocking motion which occurs about a pair of spaced, substantially parallel axes, and a second pair of opposed, outwardly curved legs, each having a length which is different from said lengths of said first pair of legs, also operatively interconnecting said element and said reflector, for producing in the latter, in response to movements occurring in the former, oscillatory rocking motion which occurs about a pair of spared, substantially parallel axis which are angularly offset from the first-mentioned pair of axes.

Claim 4

Electro-mechanical apparatus for changeably directing the projection axis of a reflected light beam to create thereby, on a remote surface, infinitely varying light-impingement patterns which are related to a variable-frequency electrical signal, said apparatus comprising a light-beam producer, a reflector positioned to reflect a beam produced by said producer, an oscillatable element, means for producing oscillation of said element at frequencies related to those of said signal, a first pair of opposed, outwardly curved legs, each leg having a length operatively interconnecting said element and said reflector, for producing in the latter, in response to movements occurring in the former, oscillatory rocking motion which occurs about a pair of spaced, substantially parallel axes, and a second pair of opposed, outwardly curved legs, each having a length which is different from said lengths of said first pair of legs, also operatively interconnecting said element and said reflector, for producing in the latter, in response to movements occurring in the former, oscillatory rocking motion which occurs about a pair of spared, substantially parallel axis which are angularly offset from the first-mentioned pair of axes.