A terminal includes a first connection section having a first connection central axis extending centrally though the first connection section along a longitudinal direction and a shoulder having a first surface extending normal to the longitudinal direction at an end of the first connection section. The shoulder has a width greater than the first connection section in a width direction perpendicular to the longitudinal direction and has a shoulder central axis extending centrally though the shoulder along the longitudinal direction. The shoulder central axis is offset from the first connection central axis in the width direction.

An electrical connector apparatus for use in a downhole tool comprising a housing, a contact screw within outer threads and inner threads, a contact plunger within the inner bore of the housing and a second cylinder protruding from the first cylinder. The contact spring is located between the contact plunger and the contact screw and pre-loads the contact plunger within the housing.

An electrical connector apparatus for use in a downhole tool comprising a housing, a contact screw within outer threads and inner threads, a contact plunger within the inner bore of the housing and a second cylinder protruding from the first cylinder. The contact spring is located between the contact plunger and the contact screw and pre-loads the contact plunger within the housing.

A method for controlling a target switch assembly in a chain of switch assemblies includes distributing the chain of switch assemblies in a wellbore; placing a controller at a head of the wellbore; making a first decision, at the controller, to actuate a corresponding detonator of the target switch assembly; transmitting, from the controller to the target switch assembly, a fire command to activate the corresponding detonator; and making a second decision, locally, at the target switch assembly, to activate the detonator, after the fire command from the controller is received.

Provided is a floating structure of a coaxial connector having a floating function and ensuring a reliable connection and water cutoff property are ensured. The floating structure of the coaxial connector includes: a plug introduction hole having an inner diameter larger than an outer diameter of the plug; an enlarged diameter hole communicating with the tip side of the plug introduction hole; a locking ring fixed in the enlarged diameter hole; a slider having a slide ring disposed movably in the axial direction and the axial radial direction; and an energizing elastic member that energizes the slide ring toward the locking ring. The plug body is coupled to the slider, and the plug body is held in the plug insertion part movably in the axial direction and the axial radial direction.

An electrical connector includes a plug that mates with a receptacle. In a medical application, the plug is connected to electrical leads that pass through a patient's skin to an implanted medical device in the patient's body, while the receptacle is connected to external medical equipment. All electrical contacts in the plug are on internal portions. The receptacle includes annular contacts that contact the internal electrical contacts on the plug when the plug and receptacle are properly mated. The receptacle includes a plurality of annular electrical contacts that have a first diameter and are separated by a plurality of annular insulators having a second diameter smaller than the first diameter.

An electrical connector includes a plug that mates with a receptacle. In a medical application, the plug is connected to electrical leads that pass through a patient's skin to an implanted medical device in the patient's body, while the receptacle is connected to external medical equipment. All electrical contacts in the plug are on internal portions. The receptacle includes annular contacts that contact the internal electrical contacts on the plug when the plug and receptacle are properly mated. The receptacle includes a plurality of annular electrical contacts that have a first diameter and are separated by a plurality of annular insulators having a second diameter smaller than the first diameter.

An electrical assembly may include a bus bar assembly, a sensor assembly, including a circuit board connected to the bus bar assembly, and a sensor, a bracket connected to the bus bar assembly, and a cooling member connected to the bracket. A method of assembling an electrical assembly may include connecting a shunt resistor with a bus bar assembly, connecting a circuit board with the bus bar assembly, connecting the bus bar assembly with the bracket, disposing the cooling member on or about the bracket, and/or connecting the cooling member with the bracket.

An electrical assembly may include a bus bar assembly, a sensor assembly, including a circuit board connected to the bus bar assembly, and a sensor, a bracket connected to the bus bar assembly, and a cooling member connected to the bracket. A method of assembling an electrical assembly may include connecting a shunt resistor with a bus bar assembly, connecting a circuit board with the bus bar assembly, connecting the bus bar assembly with the bracket, disposing the cooling member on or about the bracket, and/or connecting the cooling member with the bracket.

A connection unit includes an insulating mounting frame and multiple resilient press-on contacts situated on the mounting frame. Each press-on contact includes a helical pressure spring that can exert an elastic force on a metal contact body. The contact body is connected in one piece to a connection plug or a connection socket. For each press-on contact, the mounting frame includes a hollow cylinder that forms a cavity within a circumferential wall, the cavity being closed off by a cover that is situated so as to be axially displaceable at the wall of the hollow cylinder. The pressure spring is situated inside the cavity, and with its elastic force acts on the cover. The contact body, in one piece, forms a contact disk that is situated on the outer side of the cover.