A switch device includes an operation button operated by a push operation on an operating surface, light sources arranged on a lighting substrate to illuminate an illumination target of the operation button, and a plurality of switches that are arranged on a switch substrate different from the lighting substrate so as to be located on an end portion side of the operation button and are turned on due to displacement of the operation button caused by the push operation.

A safety circuit for an elevator system includes a first circuit having a plurality of switching contacts and a second circuit having a plurality of switching contacts. The switching contacts of the first circuit are connected in series, and the switching contacts of the second circuit are connected in parallel. Each switching contact of the first circuit is associated with a different switching contact of the second circuit. The switching contacts that are associated with each other are in opposite switching states.

Multiple position switches and specifically in-line multiple position switches where a user has definitive points of on and off switching which are used to turn multiple redundant internal circuit switches on and off. This can provide for increased reliability of switch operation. The multi-position switch is typically a five-position switch with all five positions in-line and with double or triple redundancy at each position. The switches can also provide for the feel of a snap action mechanism between positions.

A multi-relay including a first relay switch operable over a first current range; a second relay switch operable over a second current range; and a current sensor configured to: detect an input current; in response to the input current being within the first current range, activate the first relay switch; and in response to the input current being within the second current range, activate the second relay switch.

A relay is disclosed. In an embodiment a relay includes a first switching contact having a first main contact, a second main contact and a first movable contact; a second switching contact having a third main contact, a fourth main contact and a second movable contact, wherein the second switching contact is electrically isolated from the first switching contact; and an actuator configured to move both the first and second movable contacts from a first switching state into a second switching state by moving a drive element of the actuator from a first position into a second position.

A diagnosis device diagnoses current cutoff devices connected in parallel and disposed on an energization path to an energy storage device mounted on a vehicle. The diagnosis device performs switch processing of switching one of the current cutoff devices to be diagnosed from an opened state to a closed state or from the closed state to the opened state and closing the other current cutoff device while an engine of the vehicle is stopped. The diagnosis device detects end-to-end voltage of the current cutoff device when current larger than a threshold flows through the current cutoff device after the switch processing, and diagnoses the current cutoff device based on the detected end-to-end voltage.

A key switch includes a movable part configured to be moved by a pressing operation, a support mechanism that movably supports the movable part, an electrical connector including multiple pairs of contacts of upper electrodes and lower electrodes, and a disc spring that is disposed between the movable part and the electrical connector and configured to be elastically deformed by movement of the movable part and to press the electrical connector. The multiple pairs of contacts are provided for one movable part. When the disc spring is deformed by the movement of the movable part, the disc spring is configured to simultaneously press the multiple pairs of contacts provided for the corresponding movable part.

A method for charging an auxiliary voltage source that provides power for at least one additional component, the additional component being in addition to an electric drive that is powered by a main voltage, is described. The method includes electrically connecting a protection and/or control circuit to the main voltage source via a DC-to-DC converter configured for power supply, and to the auxiliary voltage source via a reverse blocking valve. The method further includes electrically connecting the main voltage source to the auxiliary voltage source via a charging device. The method still further includes charging the auxiliary voltage source via the main voltage source.

A connector includes two connection terminals to be electrically connected to terminals of another connector, and a switch connected to the connection terminals. The switch includes a first switch connected to one of the connection terminals, the first switch including a first fixed part including a fixed contact, and a first movable part including a movable contact that is contactable by the fixed contact, and a second switch connected to another of the connection terminals, the second switch including a second fixed part including a fixed contact, and a second movable part including a movable contact that is contactable by the fixed contact. The first fixed part and the second fixed part, or the first movable part and the second movable part include multiple contacts.

A method for charging an auxiliary voltage source of a boat having an electric drive that is powered by a main voltage source of the boat, the auxiliary voltage source providing power for at least one additional component, is described. A protection and/or control circuit is electrically connected to the main voltage source via a DC-to-DC converter configured for power supply, and to the auxiliary voltage source via a switch or a reverse blocking valve. The auxiliary voltage source is charged via the main voltage source.