Circuit Protection Device Having Warning Function
OwnerTsung Mou Yuinventor
Life of this patent
Estimating the term…
Abstract
A circuit protection device having a warning function includes a casing with a button, a first terminal and a second terminal connected thereto. A resilient bimetallic plate is connected between the two terminals and bends to be separated from the second terminal when overheat or overflow. A warning light is located within the button and connected to the first terminal. When the main circuit is connected, no current flows through the warning light which is not activated. When overheat or overflow, the bimetallic plate bends to cut off the main circuit and a connection member on the warning light is in contact with the second terminal to form a weak current circuit to light up the warning light.
Claims14
A circuit protection device having a warning function, comprising:
- a casing;
- a button connected to the casing and capable of moving up and down;
- a first terminal and a second terminal connected to the casing;
- a resilient bi-metallic plate capable of bending toward two opposite directions due to temperature change;
- and
- a warning light located within the button and having a first leg and a second leg, a resistor and a resilient member connected to the first leg, a connection member electrically connected to the second leg, the resilient member electrically connected with the first terminal, the resilient member capable of providing an upward elastic force to the button and the warning light;
- wherein the button and the warning light are moved downward to make a main circuit in a connected state, the resilient member is compressed, the bi-metallic plate electrically connects the first terminal with the second terminal, a current of the main circuit flows through the first terminal, the bi-metallic plate and the second terminal, in the meanwhile, the connection member of the warning light is separated from the second terminal and therefore a circuit of the warning light is disconnected;
- when overheat or overflow, the bi-metallic plate bends to separate from the second terminal, the main circuit is cut off, and the button and the warning light are pushed upward by the resilient member so that the connection member is in contact with the second terminal to form a weak current circuit via the first terminal, the resilient member, the resistor, the warning light, the connection member and the second terminal, the warning light lights up.
A circuit protection device having a warning function, comprising:
- a casing;
- a button connected to the casing and capable of moving up and down;
- a first terminal and a second terminal connected to the casing;
- a resilient bi-metallic plate capable of bending toward two opposite directions due to temperature change;
- and
- a warning light located within the button and having a first leg and a second leg, a resistor and a resilient member connected to the first leg, a connection member electrically connected to the second leg, the resilient member electrically connected with the first terminal, the resilient member capable of providing an upward elastic force to the button and the warning light;
- wherein the button and the warning light are moved downward to make a main circuit in a connected state, the resilient member is compressed, the bi-metallic plate electrically connects the first terminal with the second terminal, a current of the main circuit flows through the first terminal, the bi-metallic plate and the second terminal, in the meanwhile, the connection member of the warning light is contacted with the second terminal and therefore a circuit of the warning light is connected;
- all of the current flows through the main circuit and a current flows through the circuit of the warning light approached zero, the warning light is not activated;
- when overheat or overflow, the bi-metallic plate bends to separate from the second terminal, the main circuit is cut off, and the button and the warning light are pushed upward by the resilient member so that the connection member is in contact with the second terminal to form a weak current circuit via the first terminal, the resilient member, the resistor, the warning light, the connection member and the second terminal, the warning light lights up.
Dependencies are inferred from the claim text.