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1. WO1996005605 - IMPROVEMENTS TO SWITCHING SYSTEMS

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS
1. A switching system including first signal emitting means for emitting a first signal, second signal emitting means for selectively emitting a second signal, and signal detecting means for detecting signals emitted by said first and second signal emitting means, said signal detecting means providing variations in output and thereby a switching function in accordance with said signals selectively emitted by said second signal emitting means .

2. A switching system according to Claim 1 wherein said second signal emitting means is adapted to selectively emit a signal which cancels the signal emitted by said first signal emitting means as received or detected by said detecting means.

3. A switching system according to Claim 2 wherein said signal emitted by said second signal emitter is at the same or substantially the same frequency or range of frequencies as the signal emitted by said first signal emitting means but 180 degrees out of phase with that signal.

4. A switching system according to Claim 1 wherein said signal emitted by the second signal emitting means adds to said signal emitted by said first signal emitting means as received or detected by said detecting means whereby the detecting means detects variations in amplitude of signal received in accordance with said signal emitted by the second signal emitting means.

5. A switching system according to Claim 4 wherein said variation in detected amplitude is used to provide a switching function.

6. A switching system according to Claim 1 wherein said first signal emitting means comprises one or more signal emitting devices adapted to emit signals at discrete frequencies in the electromagnetic spectrum.

7. A switching system according to Claim 6 wherein said second signal emitting means comprises one or more signal emitting devices adapted to emit signals at discrete frequencies in the electromagnetic spectrum.

8. A switching system according to claim 7 wherein said signal detecting means may comprise one or more signal detecting means for detecting the signal or signals emitted by the first and second signal emitting device or devices .

9. A switching system according to claim 1 wherein one or more of said signals emitted is employed as a functional clock for the control of the operating sequence of the equipment allowing the use of a clock speed equal to or a multiple or division of the frequency of that signal or signals.

10. A method of switching, said method including the steps of emitting a first signal, emitting a second signal, detecting said first and second signals to provide a switching output in accordance with the frequency and phase of said first and second signals.

11. A method according to Claim 10 wherein said second signal may be selectively emitted whereby to provide selective variation in the switching output.

12. A method according to Claim 11 wherein said second signal is emitted so as to be 180 degrees out of phase with said first signal whereby when emitted, it effectively cancels said first signal.

13. A method according to Claim 12 wherein said first and second signals are at substantially the same frequency or range of frequencies.

14. A method according to Claim 11 wherein said second signal is in phase with said first signal to add to the amplitude of the signal detected.