Multiple slide projector control system

Claim 2

Apparatus for providing a composite signal for recording on a single track of a recording medium, said composite signal being comprised of slide change and lamp intensity control signals for a first and a second slide projector comprising; first, second, third and fourth oscillator means for producing first, second, third and fourth frequency signals, respectively, each of said first second, third and fourth frequency signals being at a different frequency, said first and second oscillator means being provided with switching means for enabling an output from said first and second oscillator means to provide slide change signals for said first and second slide projectors, respectively, said third and fourth oscillator means being provided with means for varying their respective outputs to provide lamp intensity control signals for said first and second slide projectors, respectively, mixer means for receiving the outputs of said first, second, third and fourth oscillator means and for providing a composite signal to be recorded on a single track and first and second level detector and switch means for receiving the output of said first and second oscillator means to provide a slide change signal to said first and second slide projectors during recording of the output of said first and second oscillator means.

Claim 3

Apparatus as recited in claim 1 including third and fourth level detector means for receiving the outputs of said third and fourth oscillator means, respectively, first and second lamp intensity control circuit means for receiving the outputs of said third and fourth level detector means, respectively, and for providing lamp intensity control signals to said first and second slide projectors, respectively.

Claim 4

Apparatus for providing a composite signal for recording on a single track of a recording medium, said composite signal being comprised of slide change and lamp intensity control signals for a first and a second slide projector comprising; first, second, third and fourth oscillator means for producing first, second, third and fourth frequency signals, respectively, each of said first second, third and fourth frequency signals being at a different frequency, said first and second oscillator means being provided with switching means for enabling an output from said first and second oscillator means to provide slide change signals for said first and second slide projectors, respectively, said third and fourth oscillator means being provided with means for varying their respective outputs to provide lamp intensity control signals for said first and second slide projectors, respectively, mixer means for receiving the outputs of said first, second, third and fourth oscillator means and for providing a composite signal to be recorded on a single track and first and second level detector means for receiving the outputs of said third and fourth oscillator means, respectively, first and second lamp intensity control circuit means for receiving the outputs of said first and second level detector means, respectively, and for providing lamp intensity control signals to said first and second slide projectors, respectively.

Claim 5

Apparatus for providing a composite signal for recording on a single track of a recording medium, said composite signal being comprised of slide change and lamp intensity control signals for a first and a second slide projector comprising; first, second, third and fourth oscillator means for producing first, second, third and fourth frequency signals, respectively, each of said first second, third and fourth frequency signals being at a different frequency, said first and second oscillator means being provided with switching means for enabling an output from said first and second oscillator means to provide slide change signals for said first and second slide projectors, respectively, said third and fourth oscillator means being provided with means for varying their respective outputs to provide lamp intensity control signals for said first and second slide projectors, respectively, mixer means for receiving the outputs of said first, second, third and fourth oscillator means and for providing a composite signal to be recorded on a single track and first and second level detector means for receiving the outputs of said third and fourth oscillator means, respectively, first and second lamp intensity control circuit means for receiving the outputs of said first and second level detector means, respectively, and for providing lamp intensity control signals to said first and second slide projectors, respectively.

Claim 6

Apparatus for producing slide change and lamp intensity control signals for a first and second slide projector from a composite signal composed of first, second, third and fourth frequency signals recorded on a single track of a recording medium comprising: first, second, third and fourth tuned amplifier means for receiving the composite signal, said first, second, third and fourth tuned amplifier means producing an output signal responsive to the magnitude of first, second, thiRd and fourth frequency signals of the composite signal, respectively; first and second level detector and switch means for receiving the output of said first and second tuned amplifiers, respectively, and for providing a slide change signal to said first and second projectors, respectively; first and second level detector means for receiving the outputs of said third and fourth tuned amplifier means, respectively; first and second lamp intensity control circuit means for receiving the outputs of said first and second level detector means, respectively, and for providing a lamp intensity control signal to said first and second slide projectors, respectively.

Claim 7

Apparatus for producing slide change and lamp intensity control signals for a first and second slide projector from a composite signal composed of first, second, third and fourth frequency signals recorded on a single track of a recording medium comprising: first, second, third and fourth tuned amplifier means for receiving the composite signal, said first, second, third and fourth tuned amplifier means producing an output signal responsive to the magnitude of first, second, thiRd and fourth frequency signals of the composite signal, respectively; first and second level detector and switch means for receiving the output of said first and second tuned amplifiers, respectively, and for providing a slide change signal to said first and second projectors, respectively; first and second level detector means for receiving the outputs of said third and fourth tuned amplifier means, respectively; first and second lamp intensity control circuit means for receiving the outputs of said first and second level detector means, respectively, and for providing a lamp intensity control signal to said first and second slide projectors, respectively.

Claim 8

Apparatus for providing a composite signal for recording on a single track of a recording medium and for producing slide change and lamp intensity control signals from the composite signal when retrieved from the single track of the recording medium, the composite signal being comprised of slide change and lamp intensity control signals for a first and a second slide projector comprising: first, second, third and fourth oscillator-tuned amplifier means, each of said oscillator-tuned amplifier means being provided with switch means enabling operation as an oscillator or as a tuned amplifier, each of said oscillator-tuned amplifier means being tuned to different frequencies, each of said first, second, third and fourth oscillator-tuned amplifier means providing an output frequency signal to a mixer means and to a first, second, third and fourth level detector means, respectively; switch means for disabling the output of said mixer means when said oscillator-tuned amplifier means are operating as tuned amplifiers; first and second switch means for receiving the outputs of said first and second level detectors, respectively, to produce slide change signals for said first and second slide projectors, respectively, first and second lamp intensity control circuit means for receiving the outputs of said third and fourth level detectors, respectively, and for providing lamp intensity control signals to said first and second slide projectors, respectively.

Claim 9

Apparatus for providing a composite signal for recording on a single track of a recording medium and for producing slide change and lamp intensity control signals from the composite signal when retrieved from the single track of the recording medium, the composite signal being comprised of slide change and lamp intensity control signals for a first and a second slide projector comprising: first, second, third and fourth oscillator-tuned amplifier means, each of said oscillator-tuned amplifier means being provided with switch means enabling operation as an oscillator or as a tuned amplifier, each of said oscillator-tuned amplifier means being tuned to different frequencies, each of said first, second, third and fourth oscillator-tuned amplifier means providing an output frequency signal to a mixer means and to a first, second, third and fourth level detector means, respectively; switch means for disabling the output of said mixer means when said oscillator-tuned amplifier means are operating as tuned amplifiers; first and second switch means for receiving the outputs of said first and second level detectors, respectively, to produce slide change signals for said first and second slide projectors, respectively, first and second lamp intensity control circuit means for receiving the outputs of said third and fourth level detectors, respectively, and for providing lamp intensity control signals to said first and second slide projectors, respectively.