Indicator lamp system
DCFirst Claim
1. For use with means for controlling power provided by a source to an electrical load, a circuit that senses whether power to the load is on and that includes a switching power supply, driven by said source, to provide power for an indicator lamp that emits a low light intensity when the power to the load is off and higher light intensity when power to the load is on, said switching power supply comprising a solid state switch means.
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Abstract
An indicator lamp indicates the status of an electrically-powered load control system by providing dim light when the load power is off and a brighter light when the load power is on. In another embodiment, the lamp not only provides two levels of light to indicate whether or not power is on, but also provides a repetitive flash when power to the system is being controlled by remote control. The indicator lamp can also indicate a break in the load circuit. Depending on the embodiment, the break can cause the lamp to be either off or flashing, regardless of the position of the load power switch. Alternatively, a break in the load circuit can cause the lamp to provide substantially no light if the load power switch is in the "off" position, with full light in the "on" position.
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Citations
26 Claims
- 1. For use with means for controlling power provided by a source to an electrical load, a circuit that senses whether power to the load is on and that includes a switching power supply, driven by said source, to provide power for an indicator lamp that emits a low light intensity when the power to the load is off and higher light intensity when power to the load is on, said switching power supply comprising a solid state switch means.
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12. A lighting control system comprising
(a) means for controlling power provided by a source to a lighting load and (b) a circuit means that senses whether said power to the load is on and that includes a switching power supply driven by said source to provide current for an indicator lamp that emits a low light intensity when said power to the load is off and a higher light intensity when said power to the load is on, said switching power supply comprising a solid state first switch means.
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17. A system for controlling power provided by an a.c. source to an electrical load comprising, in combination,
(a) an electrically-controlled switch having an "on" position for connecting power from said a.c. source to said load and an "off" position for disconnecting power from said load and (b) an indicator lamp means to emit (i) when said electrically-controlled switch is in said "on" position, a high light intensity; -
(ii) when said electrically-controlled switch is in said "off" position, a lower light intensity if there is no break in said electrical load and substantially no light if there is a break in said electrical load; (c) drive means comprising, in combination, (i) a switching power supply, driven by said source, for providing a high current to said indicator lamp to emit said high light intensity and (ii) a resistor in series with said source and said indicator lamp for providing, alternatively, a low current signal to said indicator lamp to emit said lower light intensity; and (d) control means connected to said electrically-controlled switch and to said switching power supply to turn them on and off in unison. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification