A trigger assembly, for use with a power tool having an electric motor, includes a trigger, a conductor coupled for movement with the trigger, and a printed circuit board. The printed circuit board has an inductive sensor thereon responsive to relative movement between the conductor and the inductive sensor caused by movement of the trigger. An output of the inductive sensor is used to activate the electric motor.

A touch sensing device includes: a first touch sensing unit including a first sensing electrode and a first sensing inductor electrically connected to each other, wherein capacitance of the first touch sensing unit varies depending on parasitic capacitance formed between the first sensing electrode and a human body according to a contact of the human body; a first force sensing unit including a first sensing coil spaced apart from an internal side surface of a frame, wherein inductance of the first force sensing unit varies depending on a change in distance between the first sensing coil and the frame according to a pressing touch; and a circuit unit configured to detect whether a touch of the human body is input, based on variations in the capacitance of the first touch sensing unit and variations in the inductance with the force sensing unit.

A system for sensing a position of a locking bolt of an industrial locking switch includes an inductive circuit, a converter, and a master controller. The inductive circuit includes an inductive coil and a capacitor electrically connected in parallel. The inductive coil is positioned to receive a locking bolt of an industrial locking switch when the locking bolt is transitioned to a lock position. The converter is configured to convert a frequency of a current signal on the inductive circuit to a digital frequency value. The master controller is configured to generate a bolt detection signal in response to determining that the digital frequency value changes by an amount equal to or substantially equal to a defined frequency shift corresponding to a frequency shift induced by the inductive coil in response to presence of the locking bolt within the inductive coil's magnetic field.

A surgical instrument is disclosed. The surgical instrument includes a shaft, a sensing array and a fluid detection circuit. The sensing array is positioned within the shaft. The fluid detection circuit is electrically coupled to the sensing array, and is configured to determine when a fluid originating from an environment external to the shaft is present within the shaft.

A touch sensing device includes: at least one sensing coil disposed on a substrate; a sensing circuit unit configured to detect applied external pressure, based on a change in inductance of the at least one sensing coil; and a deformation inducing shaft configured to block one side of the at least one sensing coil in one direction and open another side of the at least one sensing coil in another direction.

A touch sensing module includes: a first sensing coil and a second sensing coil, each having inductance varying in response to an applied force touch; a first pad having capacitance varying in response to an applied contact touch, disposed closer to the second sensing coil than to the first sensing coil, and electrically connected to the first sensing coil to constitute a first resonance circuit; and a second pad having capacitance varying in response to the applied contact touch, disposed closer to the first sensing coil than to the second sensing coil, and electrically connected to the second sensing coil to constitute a second resonance circuit.

The invention relates to an apparatus for detecting a key press comprising a circuit substrate, a key module with a key cap and a movement mechanism, and a device for detecting the movement of the key cap, wherein the movement mechanism has at least one movement element wherein this device comprises an electrical resonance circuit with at least one capacitor and with a primary coil and comprises a secondary coil wherein the device for detecting the movement of the key cap comprises a measuring device for detecting and/or processing at least one physical variable of the electrical resonance circuit, which variable changes during the movement of the key cap, and outputs at least one electrical signal that is dependent on the change in the physical variable.

The invention relates to a device for detecting a key press of a keyboard, comprising a key module, a circuit substrate, a planar coil arranged on or in the circuit substrate, and at least one damping element, wherein the at least one damping element for damping the planar coil is movably arranged in the key module between a rest position and an actuation position, wherein the damping element executes a first actuating movement during the movement in the direction of the actuation position and executes a second actuating movement) during the movement towards the rest position, and wherein the device (10) outputs at least one electrical signal when carrying out the first actuating movement and/or the second actuating movement.

The invention also relates to a keyboard comprising one or more such devices and to a method for detecting a key press of a key module with such a device.

A converter includes a coil of axis XX′, a multi-pole magnet, arranged in such a way that the magnetic polarities of two adjacent magnetised zones are oriented so that they are anti-parallel, a ferromagnetic field frame comprising a frame and a main section, the field frame further comprising a main air gap located on the main section, and a first lateral air gap and a second lateral air gap which are located on the frame, the main air gap, the first lateral air gap and the second lateral air gap being arranged in such a way as to form a guide member in which the multi-pole magnet is inserted by sliding, and in such a way as to allow a magnetic coupling of three successive magnetised zones with, respectively, the first lateral air gap, the main air gap, and the second lateral air gap.

A surgical instrument is disclosed comprising a housing and a control circuit mounted to and/or embedded in the housing.