A method and apparatus for ranging finding of signal transmitting devices is provided. The method of signal reception is digitally based only and does not require receivers that are analog measurement devices. Ranging can be achieved using a single pulse emitting device operating in range spaced relation with a minimum of a single signal transmitter and a single digital receiver and processing circuitry. In general a plurality of transmitting pulsed emitters may be ranged and positioned virtually simultaneously in 3-dimensions (XYZ coordinates) using a configuration of a plurality of digital receivers arranged in any fixed 3-dimensional configuration. Applications may involve at least one single transmitter to receiver design to determine range, or at least one transmitted reflecting signal off from an object to determine range.

The present utility model discloses a combined mute switch comprising a base and an upper cover arranged above the base, an accommodating cavity being formed in the combination of the upper cover and the base, a guide core being arranged in the accommodating cavity; at least one upper elastically deformable silencing member is arranged on the upper cover and on the top wall of the accommodating cavity; at least one lower elastically deformable silencing member is arranged on a lower end of the guide core; an impact force of the guide core moving downwards is damped and silenced by the lower elastically deformable silencing member; and an impact force of the guide core moving upwards to be reset is damped and silenced by the upper elastically deformable silencing member. The combined mute switch provided by the present utility model achieves a mute effect when being pressed and popped to reset.

A waterproof switch assembly having a rigid casing with a first opening, a compressible elastomeric body attached to said casing around the first opening and defining a push button covering said first opening or attached to a push button covering said first opening, defining a hermetically sealed closed compartment within said casing; a Printed Circuit Board (PCB) housed inside the closed compartment and bearing a protruding electric switch component pushable by the push button; a protective frame, housed inside the closed compartment, surrounding the perimeter of the protruding electric switch component, and attached to the PCB through several connection legs distributed around the protruding electric switch component. The compressible elastomeric body includes protruding elements surrounding the protective frame to transmit shear forces, parallel to the PCB, from the push button to the PCB through the protective frame and connection legs without affecting the protruding electric switch component.

An electronic device according to the present invention comprises a main body including a pair of body chassis, a pair of cover panels disposed to cover the front face and the back face of the main body, a switch unit disposed on the side part of the main body, an operation button which is held between the pair of cover panels and has a pusher projecting therefrom, a housing recess which is formed on at least one of the body chassis and recessed on a joint surface with the other body chassis to form a housing chamber for the switch unit, a through hole penetrating the one body chassis from the side face toward the housing recess, and a bag-like waterproof packing member which is attached to the through hole and recessed toward the switch unit to house the pusher of the operation button. The pusher of the operation button passes through the through hole toward the switch unit, and the end of the waterproof packing member is pressed against the switch unit to fixedly hold the switch unit inside the housing recess.

An electronic device according to the present invention comprises a main body including a pair of body chassis, a pair of cover panels disposed to cover the front face and the back face of the main body, a switch unit disposed on the side part of the main body, an operation button which is held between the pair of cover panels and has a pusher projecting therefrom, a housing recess which is formed on at least one of the body chassis and recessed on a joint surface with the other body chassis to form a housing chamber for the switch unit, a through hole penetrating the one body chassis from the side face toward the housing recess, and a bag-like waterproof packing member which is attached to the through hole and recessed toward the switch unit to house the pusher of the operation button. The pusher of the operation button passes through the through hole toward the switch unit, and the end of the waterproof packing member is pressed against the switch unit to fixedly hold the switch unit inside the housing recess.

An engageable lockout and tagout device for aircraft pushbutton switches prevents attempts to electrically engage a corresponding control panel circuit of a system under service. The lockout and tagout device is configured to lock different pushbutton switch types present in a flight deck, including Korry switches, thereby preventing operators from actuating switches and alerting them that the switches have been disengaged.

An engageable lockout and tagout device for aircraft pushbutton switches prevents attempts to electrically engage a corresponding control panel circuit of a system under service. The lockout and tagout device is configured to lock different pushbutton switch types present in a flight deck, including Korry switches, thereby preventing operators from actuating switches and alerting them that the switches have been disengaged.

A keyboard switch, including a base; a static contact; a moving contact; an upper cover; a button configured to control the contact of the static contact and the moving contact; and a reset spring configured to control the reset of the button.

A keyboard switch, including a base; a static contact; a moving contact; an upper cover; a button configured to control the contact of the static contact and the moving contact; and a reset spring configured to control the reset of the button.

A key structure includes an upper cover, a movable element, an elastic element, a pressure sensing module, a base, and a circuit board. The pressure sensing module is arranged on the base, and the pressure sensing module is electrically connected with the circuit board. The pressure sensing module includes a pressure sensing element and a conducting element, and the pressure sensing element is configured for contacting with the movable element after being pressed, monitoring a pressure on the movable element, and converting the pressure into a pressure signal; the conducting element is configured for conducting the pressure signal to the circuit board.