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1. CA2372487 - COMMUTATEUR ELECTRIQUE COMPACT SANS CONTACT

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]
What is claimed is:
1. A compact non-contact electrical switch for use in an electrical box mountable in a wall and having an electrical circuit comprising:
means for detecting a presence of an object adjacent to the switch and for generating an output signal;
a central processing unit connected to the presence detecting means and having means for receiving the output signal therefrom, and having signal processing means for calculating a power output in response to the output signal for generating a control signal for controlling power supplied to the electrical circuit, the central processing unit being provided with a differentiator for receiving the output signal and for transmitting the output signal only on a change in a presence before the switch.
2. The switch according to claim 1, wherein the detecting means is a capacitive sensor.
3. The switch according to claim 1 or 2, further comprising an AC period zero cross detector and a triac in the electrical circuit and wherein the control signal is a delayed triac trigger pulse for controlling power supplied to the electrical circuit.
4. The switch according to claim 1 or 2, further comprising a relay in the electrical circuit, wherein the control signal activates the relay for controlling power in the electrical circuit.
5. The switch according to any one of claims 1 to 4, further comprising an A/D converter to convert the output signal from the detecting means to a digital value.
6. The switch according to any one of claims 1 to 5, further comprising a comparator to compare the output signal to a threshold level for transmitting
first data bit only when the output signal exceeds the threshold level.
7. The switch according to any one of claims 1 to 6, wherein the signal processing means is a control logic converter, where the amount of power to be
supplied is determined as a function of the output signal.
8. The switch according to any one of claims 3 to 7, further comprising a delay counter synchronized with an AC period via the AC period zero cross detector, to generate a time delay after AC period zero crossing proportional to the output signal.
9. The switch according to any one of claims 1 to 8, wherein the control signal varies the power in the electrical circuit to provide a dimmer function.
10. The switch according to any one of claims 1 to 9, further comprising a power supply for the switch.
11. The switch according to claim 10, wherein the power supply comprises a semiconductor element coupling a capacitor directly to a line voltage, such
that when the line voltage is below a certain level, the capacitor is charged.
12. The switch according to claim 11, further comprising a regulator connected to the capacitor to regulate the line voltage.
13. The switch according to any one of claims 1 to 12, further comprising an air gap switch engaged with the non-contact electrical switch, a movable cover
plate engaged to the air gap switch for activating the air gap switch to halt power supply to the electrical circuit.
14. The switch according to claim 13, wherein the cover plate has means to engage the air gap switch.
15. The switch according to claim 13 or 14, wherein the cover plate is movable to toggle a lever disconnect switch, the cover plate having an arm for
activating the lever.
16. The switch according to claim 13, wherein the cover plate is movable for being pulled in or out to toggle a push button disconnect switch.
17. The switch according to any one of claims 1 to 16, further comprising means for lighting integrated with the switch.
18. The switch according to any one of claims 1 to 17, further comprising a remotely located controller in communication with the switch for remotely activating or operating the switch.
19. The switch according to any one of claims 1 to 18, further comprising a separate input for control by a slave non-contact sensor unit.
20. The switch according to any one of claims 1 to 19, further comprising an interference detector to improve noise immunity.
21. The switch according to any one of claims 1 to 20, wherein the processing unit has a software algorithm to improve noise immunity.
22. The switch according to any one of claims 1 to 21, wherein an integration in a lighting system comprising at least one light source, means to connect the light source, and means to connect the light source with a power supply, whereby the light source is turned on and off, or a sequence of lighting, or a single light source or multiple light sources is initiated, or an intensity of the light source is varied.
23. The switch according to claim 22, wherein an intensity of the light source
is varied in response to power flow through the electrical circuit.
24. The switch according to claim 22 or 23, wherein the central processing unit is programmed to generate a lighting sequence or an intensity to attract attention.