Apparatuses and methods for activating a switch are provided. The switch is supported by one of a bracket and a panel and includes a switch body and a switch plunger that is moveably coupled to the switch body to activate and deactivate the switch. In one example, the apparatus includes a clamp body that is configured to be removably coupled to the one of the bracket and the panel and that has an opening formed therethrough. The apparatus further includes a rod portion having a first end portion that has a surface that includes a first concave surface. The rod portion is configured to be advanced through the opening. The surface interfaces with the switch plunger and moves the switch plunger to activate the switch when the clamp body is coupled to the one of the bracket and the panel and when the rod portion is advanced through the opening.

A household appliance includes a compartment, a door for closing the compartment, a non-movable part, and a door monitoring apparatus including a contact pair which has two contact parts. One of the two contact parts is arranged on the door and the other one of the two contact parts is arranged on the non-movable part of the household appliance.

A circuit arrangement for switching an electrical load comprising an electrical switching element with a control input and an output; a control unit connected to the control input to drive the electrical switching element, in a first switching state, to generate a first output signal forming a switch-on signal for the load and, in a second switching state, to generate a second output signal, smaller than the first output signal, forming a switch-off signal for the electrical load; a safety output connected electrically to the electrical switching element output and to which the electrical load is connected; a decoupling apparatus arranged between the electrical switching element output and the safety output; a first output signal detecting apparatus connected to the electrical switching element output; and a second output signal detecting apparatus arranged in a circuit path between the decoupling apparatus and the safety output.

A circuit arrangement for switching an electrical load comprising an electrical switching element with a control input and an output; a control unit connected to the control input to drive the electrical switching element, in a first switching state, to generate a first output signal forming a switch-on signal for the load and, in a second switching state, to generate a second output signal, smaller than the first output signal, forming a switch-off signal for the electrical load; a safety output connected electrically to the electrical switching element output and to which the electrical load is connected; a decoupling apparatus arranged between the electrical switching element output and the safety output; a first output signal detecting apparatus connected to the electrical switching element output; and a second output signal detecting apparatus arranged in a circuit path between the decoupling apparatus and the safety output.

An entry sensor, which supports either wireless or wired operation, facilitates installation and is adjustable for gaps between a building entry barrier such as a door or window and the surrounding frame. The sensor, which may be implemented as a single piece design, includes an adjustment mechanism that enables an installer to vary the extension of the sensor to match the actual gap so that the sensor properly secures the building entry when closed. The sensor includes a detector that determines the state of a switch that is responsive to the movement of a plunger mechanism, where the state is indicative whether the building entry barrier is opened or closed, and that may determine whether the sensor is tampered with. The sensor also may facilitate battery replacement that protects the associated circuitry during the replacement.

A contact mechanism includes an opening/closing fixed contact, an opening/closing movable contact opposed to the opening/closing fixed contact, and a permanent magnet configured to extend an arc that occurs between the opening/closing fixed contact and the opening/closing movable contact in a predetermined direction. In particular, an arc that occurs from contact surface regions where the opening/closing fixed contact and the opening/closing movable contact make contact with each other is extended by a magnetic force of the permanent magnet and moved to non-contact surface regions where the opening/closing fixed contact and the opening/closing movable contact make no contact with each other.

A control device with limit switches is provided. The device has a container housing an electric circuit provided with one or more limit switches, and a driving assembly configured to control operation of a valve or an actuator through the limit switches of the electric circuit. The driving assembly has a shaft configured to be rotatably coupled to a valve or an actuator and one or more cams keyed on the shaft and is configured for driving the limit switches of the electric circuit. The shaft has a gripping surface and each cam has a radial clamping mechanism whose gripping members are arranged in correspondence of a through hole configured to allow to fit the cam onto the shaft.

A push button switch includes a housing made up of a base and a cover, a first plunger mounted on the cover so as to be pushed down, a movable contacting piece configured to be driven by a push-down operation on the first plunger, a movable contact provided in the movable contacting piece, and a fixed contact disposed so as to come into and out of contact with the movable contact. Specifically, the movable contacting piece includes a movable contact piece provided with the movable contact, and an operation tongue piece disposed on at least one side of the movable contact piece and coupled with the movable contact piece so as to rotate integrally. The operation tongue piece is operated by the operation body of the first plunger to bring the movable contact into and out of contact with the fixed contact.

A fuel cell-type industrial vehicle according to the present disclosure includes a vehicle main body in which a fuel cell unit is installed, and controller configured to control operations of the vehicle main body. The fuel cell unit includes a charging plug which is connectable to a charging socket for supplying fuel gas, and a detection mechanism configured to detect the connection state between the charging plug and the charging socket. The detection mechanism includes a sensor having an output signal that shifts in accordance with the connection state of the charging socket relative to the charging plug. The controller prohibits operation of the vehicle main body after determining, on the basis of the output signal of the sensor, that the charging socket is connected to the charging plug.

A fuel cell-type industrial vehicle according to the present disclosure includes a vehicle main body in which a fuel cell unit is installed, and controller configured to control operations of the vehicle main body. The fuel cell unit includes a charging plug which is connectable to a charging socket for supplying fuel gas, and a detection mechanism configured to detect the connection state between the charging plug and the charging socket. The detection mechanism includes a sensor having an output signal that shifts in accordance with the connection state of the charging socket relative to the charging plug. The controller prohibits operation of the vehicle main body after determining, on the basis of the output signal of the sensor, that the charging socket is connected to the charging plug.