| 摘要 |
A state and operation indicator for a snap switch is provided. Presently, instrumentation is often needed in order to determine if a snap switch is malfunctioning. Information may be provided on a control panel inconveniently positioned remotely as compared with the location of the snap switch itself. This disclosure provides for an indicator of the state and operation of a snap switch, which does not require the use of instrumentation, and which is proximate the snap switch. This indicator can be used in both alternating and direct current circuits. When the common terminal of the switch is energized an associated light can provide a cue that the power is on. The state and operation indicator can also have either a light associated with the normally open terminal, a light associated with the normally closed terminal, or both. These lights can respond to indicate the state and operation of the switch. |
| 主权项 |
1. A state and operation indicator for a snap switch having a common, a normally closed and/or a normally open terminal, comprising:
a common connector providing electric communication between the common terminal at one end of the common connector and a printed circuit board at the opposing end of the common connector, wherein the printed circuit board is configured to be positioned proximate the snap switch; and a first light emitting device and a first light emitting device driver attached to the printed circuit board, wherein the first light emitting device is powered through the first light emitting device driver; wherein when the common terminal is energized, current is transmitted through the common connector, printed circuit board, and first light emitting device driver to the first light emitting device, which in response emits light; and a normally open connector providing electric communication between the normally open terminal at one end of the normally open connector and a printed circuit board at the opposing end of the normally open connector; and a second light emitting device and a second light emitting device driver attached to the printed circuit board, wherein the second light emitting device is powered through the second light emitting device driver; wherein when the switch is activated, the normally open terminal closes causing current to pass through the normally open terminal, the current is transmitted through the normally open connector, printed circuit board, and second light emitting device driver to the second light emitting device, which in response emits light; and a wire terminal connected to the printed circuit board and a power supply for sinking currents which pass through the light emitting devices. |
