Configuration for identifying a switch position of a power switch
First Claim
1. In combination with a microprocessor-controlled appliance operating with a switch-off delay, a configuration for identifying a switch position, comprising:
- a power switch having given switch positions and including a first switch and a second switch, said first switch being connected in series with said second switch;
said first switch and said second switch selectively opening and closing only jointly;
a sensor having a first input, a second input, and an output;
said second input of said sensor to be connected to a first conductor selected from the group consisting of a first live conductor, a second live conductor, and a neutral conductor;
said second switch having a first contact and a second contact, said first contact to be connected to a second conductor selected from the group consisting of the first live conductor, the second live conductor, and the neutral conductor;
said second contact of said second switch being connected to said first input of said sensor for passing a measurement current to said first input of said sensor when a voltage is applied and said power switch is switched on; and
a microprocessor operatively connected to said sensor, said output of said sensor transmitting an output signal corresponding to one of the given switch positions of said power switch to said microprocessor.
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Accused Products
Abstract
A configuration for identifying a switch position of a power switch for microprocessor-controlled appliances is provided. A switch connected in parallel with the power switch is to produce a switch-off delay which has no adverse effect on the interrogation of the switch position. The power switch contains two series-connected switches which can be opened or closed only jointly, with one contact of one switch being connected to one of the two live or neutral conductors, and its other contact being connected to a first input of a sensor which, when voltage is applied and the power switch is switched on, passes a measurement current to the second input of the sensor, which is connected to another one of the two live or neutral conductors. On the output side, the sensor transmits an output signal, corresponding to the switch position of the power switch to a microprocessor for the appliance.
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Citations
12 Claims
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1. In combination with a microprocessor-controlled appliance operating with a switch-off delay, a configuration for identifying a switch position, comprising:
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a power switch having given switch positions and including a first switch and a second switch, said first switch being connected in series with said second switch;
said first switch and said second switch selectively opening and closing only jointly;
a sensor having a first input, a second input, and an output;
said second input of said sensor to be connected to a first conductor selected from the group consisting of a first live conductor, a second live conductor, and a neutral conductor;
said second switch having a first contact and a second contact, said first contact to be connected to a second conductor selected from the group consisting of the first live conductor, the second live conductor, and the neutral conductor;
said second contact of said second switch being connected to said first input of said sensor for passing a measurement current to said first input of said sensor when a voltage is applied and said power switch is switched on; and
a microprocessor operatively connected to said sensor, said output of said sensor transmitting an output signal corresponding to one of the given switch positions of said power switch to said microprocessor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A microprocessor-controlled appliance, comprising:
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a power switch having given switch positions and including a first switch and a second switch, said first switch being connected in series to said second switch;
said first switch and said second switch selectively opening and closing only jointly;
a sensor operatively connected to said microprocessor and having a first input, a second input, and an output;
said second input of said sensor to be connected to a first conductor selected from the group consisting of a first live conductor, a second live conductor, and a neutral conductor;
said second switch having a first contact and a second contact, said first contact to be connected to a second conductor selected from the group consisting of the first live conductor, the second live conductor, and the neutral conductor;
said second contact of said second switch being connected to said first input of said sensor for passing a measurement current to said first input of said sensor when a voltage is applied and said power switch is switched on; and
a microprocessor operatively connected to said sensor, said output of said sensor transmitting an output signal corresponding to one of the switch positions of said power switch to said microprocessor.
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12. A microprocessor-controlled franking machine, comprising:
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a power switch having given switch positions and including a first switch and a second switch, said first switch being connected in series to said second switch;
said first switch and said second switch selectively opening and closing only jointly;
a sensor operatively connected to said microprocessor and having a first input, a second input, and an output;
said second input of said sensor to be connected to a first conductor selected from the group consisting of a first live conductor, a second live conductor, and a neutral conductor;
said second switch having a first contact and a second contact, said first contact to be connected to a second conductor selected from the group consisting of the first live conductor, the second live conductor, and the neutral conductor;
said second contact of said second switch being connected to said first input of said sensor for passing a measurement current to said first input of said sensor when a voltage is applied and said power switch is switched on;
a microprocessor operatively connected to said sensor, said output of said sensor transmitting an output signal corresponding to one of the switch positions of said power switch to said microprocessor; and
a franking machine meter operatively connected to said microprocessor.
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Specification