Metal clad isolator switches for high tension and double interruption

Claim 2

A metal clad isolator switch for high voltage and double interruption, comprising a metal envelope intended to be connected with earth, at least three spaced apart fixed electrical contacts, two permanently electrically interconnected, mechanically coupled, axially movable switching rods provided in the space left between said fixed contacts, driving means associated with said movable switching rods and an electrically conductive support, said support carrying said switching rods and said driving means, at least two of said fixed contacts, said switching rods, said support and said driving means being insulatedly mounted in said envelope, said switching rods being directed in respect of each other at an angle which is smaller than 180*, at least the path of the first one of said switching rods extending on both sides of the line coinciding with the longitudinal axis of the second one of said switching rods, each switching rod cooperating with an individual one of said insulatedly mounted fixed contacts and said first switching contact cooperating also with said third contact and contacting in its one end position the respective insulatedly mounted fixed contact with its one end portion and in its other end position said third fixed contact with its other end portion.

Claim 3

A metal clad isolator switch as claimed in claim 1, in which the switching rods are directed in respect of each other at right angles.

Claim 4

A metal clad isolator switch as claimed in claim 1, in which the longitudinal axes of the switching rods lie in one and the same plane.

Claim 5

A metal clad isolator switch as claimed in claim 1, in which the paths of the switching rods intercross, a fourth fixed contact is provided and the second switching rod cooperates also with said fourth fixed contact and contacts in its one end position the respective insulatedly mounted fixed contact with its one end portion and in its other end position said fourth fixed contact with its other end portion.

Claim 6

A metal clad switch for double interruption of high voltage electrical systems, comprising in combination; an electrically conductive metal envelope having a first tubular branch and a second tubular branch extending at an angle to said first branch; means electrically grounding said envelope; a fixed ground contact mounted within said envelope between said branches aligned with said first branch; a fixed electrical circuit second contact substantially centered within said first branch so as to be isolated from said envelope, said second contact being aligned with said ground contact and disposed in selected spaced relation thereto; a fixed electrical circuit third contact substantially centered within said second branch and substantially spaced from the alignment axis between said second contact and said ground contact; an electrically conductive support disposed within said envelope between said branches and spaced from said ground contact as well as both said second and said third contacts, said support having a first bore extending therethrough aligned with said first branch along the axis of alignment between said second contact and said ground contact and having a second bore aligned with said second branch and said third contact; a first switching rod slidably received in said first bore and having a length less than said selected spacing but sufficient to bridge between said support and either said second contact or said ground contact; a second switching rod slidably received in said second bore and having a length sufficient to bridge between said support and said third contact; and means for simultaneously actuaTing said first and second switching rods axially between first positions connecting said second and third contacts through said switching rods and said support and second positions in which said first switching rod electrically connects said support to said ground contact and both switching rods are separated from the respective second and third contacts.

Claim 7

A metal clad switch for double interruption of high voltage electrical systems, comprising in combination; an electrically conductive metal envelope having a first tubular branch and a second tubular branch extending at an angle to said first branch; means electrically grounding said envelope; a fixed ground contact mounted within said envelope between said branches aligned with said first branch; a fixed electrical circuit second contact substantially centered within said first branch so as to be isolated from said envelope, said second contact being aligned with said ground contact and disposed in selected spaced relation thereto; a fixed electrical circuit third contact substantially centered within said second branch and substantially spaced from the alignment axis between said second contact and said ground contact; an electrically conductive support disposed within said envelope between said branches and spaced from said ground contact as well as both said second and said third contacts, said support having a first bore extending therethrough aligned with said first branch along the axis of alignment between said second contact and said ground contact and having a second bore aligned with said second branch and said third contact; a first switching rod slidably received in said first bore and having a length less than said selected spacing but sufficient to bridge between said support and either said second contact or said ground contact; a second switching rod slidably received in said second bore and having a length sufficient to bridge between said support and said third contact; and means for simultaneously actuaTing said first and second switching rods axially between first positions connecting said second and third contacts through said switching rods and said support and second positions in which said first switching rod electrically connects said support to said ground contact and both switching rods are separated from the respective second and third contacts.

Claim 8

A metal clad switch as defined in claim 5 wherein said first and second bores extend at right angles to each other within a common plane.

Claim 9

A metal clad switch as defined in claim 5 wherein said second bore also extends through said support; a fourth contact within said envelope in alignment with said second bore and spaced beyond said support on the other side thereof from said third contact; said second switching rod in said second position thereof bridging between said support and said fourth contact.

Claim 10

The metal clad switch as defined in claim 7 wherein said fourth contact is electrically grounded.

Claim 11

The metal clad switch as defined in claim 7 wherein said second switching rod in its second position bridges between said support and said fourth contact and said means selectively actuates said switching rods such that (1) said first and second switching rods simultaneously are in their first positions, (2) said first switching rod is in its second position while said second switching rod is in an intermediate position out of contact with both said third and said fourth contacts, (3) said first switching rod is in its second position while said second switching rod is in its first position, and (4) said first switching rod is in its first position while said second switching rod is in its second position.

Claim 12

The metal clad switch as defined in claim 9 wherein said fourth contact is electrically grounded.

Claim 13

The metal clad switch as defined in claim 9 wherein said means comprises a first rotatable drive element connected to said first switching rod and a second rotatable drive element coupled to said first rotatable drive element and connected to said second switching rod, said second drive element rotating at one-half the rate of said first drive element.

Claim 14

The metal clad switch as defined in claim 11 wherein said switching rods are disposed in orthogonal planes.