Movable contact-stem operator for a vacuum-type circuit-interrupter

Claim 2

A circuit-interrupting structure including a vacuum-type interrupting unit having a relatively-stationary contact and a cooperable movable contact, metallic bellows means for hermetically sealing the movable contact to the envelope of said unit, a movable-contact stem for supporting and for moving the movable contact, a movable-contact operator having a relativelyloose fit upon the exterior end of the movable-contact stem, said movable-contact operator having at least one supporting pivot aperture provided therein, a rotatable contactoperating lever having a fixed pivot adjacent one end thereof and a contact-actuating pin extending therethrough which, additionally, extends through said one pivot aperture provided in the movable-contact operator, a bolt for captively securing said movable-contact operator to the external end of the movablecontact stem, and clamping means for clamping the movable-contact operator to the external end of the movable-contact stem after insertion of the contact-actuating pin through the contactoperating lever and also through the movable-contact operator.

Claim 3

The combination according to claim 1, wherein the bolt is a shoulder-bolt having an enlarged diameter portion and an end relatively-small-diameter portion, the relatively-small-diameter portion being threadedly secured into a tapped bore provided in the external extremity of the movable-contact stem.

Claim 4

The combination according to claim 1, wherein the movable-contact operator has two-pivot-pin supporting apertures, and the rotatable contact lever comprises a pair of coacting rotatable lever-arms movable together and located externally of the movable-contact operator.

Claim 5

The combination according to claim 1, wherein the rotatable-contact lever has at least one contact-compression spring associated with one external end thereof.

Claim 6

The combination according to claim 2, wherein one or more washers are provided at the shoulder-portion of the shoulder-bolt for accommodating manufacturing tolerances associated with the vacuum-interrupting unit.

Claim 7

The combination according to claim 1, wherein the movable-contact operator generally comprises a cylindrically shaped metallic member having one end bore loosely surrounding the extremity of the movable-contact stem, an intermediate relatively reduced portion for accommodating a shank portion of the bolt, and an enlarged end portion for accommodating the head of the bolt.

Claim 8

The combination according to claim 6, wherein the movable-contact operAtor has a pair of pin-supporting apertures disposed adjacent the head-portion of the bolt.

Claim 9

The combination according to claim 1, wherein a U-shaped flange-support plate member is affixed to the movable-contact end of the vacuum-type interrupting unit, and has fixed pivot-pin supporting apertures provided through the leg portions thereof.

Claim 10

The combination according to claim 8, wherein the legs of the U-shaped flange support member have notches provided therein for accommodating tolerances of the vacuum-type interrupting units.

Claim 11

In combination, a vacuum-type circuit interrupting unit including a relatively stationary contact and a cooperable movable contact, a movable-contact stem supporting said movable contact and effecting the opening and closing motions thereof, a metallic sylphon bellows having one end hermetically sealed to the movable-contact stem and the other end hermetically sealed adjacent one end of the circuit-interrupting unit, one end of the movable-contact stem protruding externally of the evacuated envelope of the circuit-interrupting unit, a movable-contact operator having a loose removable yet available manual clamping engagement with the external protruding extremity of the movable-contact operator and additionally having a pivot-supporting aperture provided therein, a rotatable contact-operating lever, means pivotally supporting said contact-operating lever adjacent one end thereof on a fixed pivot, said contact-operating lever having a movable pivot-aperture located intermediate the ends thereof, a movable pivot-pin inserted through the movable pivot-aperture of the contact-operating lever and also through the pivot-aperture of the movable contact-operator, and manual clamping means for selectively clamping at times the movable contact-operator to said movable-contact stem.

Claim 12

In combination, a vacuum-type circuit interrupting unit including a relatively stationary contact and a cooperable movable contact, a movable-contact stem supporting said movable contact and effecting the opening and closing motions thereof, a metallic sylphon bellows having one end hermetically sealed to the movable-contact stem and the other end hermetically sealed adjacent one end of the circuit-interrupting unit, one end of the movable-contact stem protruding externally of the evacuated envelope of the circuit-interrupting unit, a movable-contact operator having a loose removable yet available manual clamping engagement with the external protruding extremity of the movable-contact operator and additionally having a pivot-supporting aperture provided therein, a rotatable contact-operating lever, means pivotally supporting said contact-operating lever adjacent one end thereof on a fixed pivot, said contact-operating lever having a movable pivot-aperture located intermediate the ends thereof, a movable pivot-pin inserted through the movable pivot-aperture of the contact-operating lever and also through the pivot-aperture of the movable contact-operator, and manual clamping means for selectively clamping at times the movable contact-operator to said movable-contact stem.

Claim 13

The combination of claim 10, wherein a bolt removably secures the movable-contact operator to the end-protruding extremity of the movable-contact stem.

Claim 14

The combination according to claim 11, wherein the bolt is a shoulder-bolt having an enlarged-diameter portion and an end relatively-small-diameter portion, the relatively-small-diameter portion being threadedly secured into a tapped bore provided in the external extremity of the movable-contact stem.

Claim 15

The combination according to claim 10, wherein the movable-contact operator has two pivot-pin supporting apertures located therein, and the rotatable contact lever comprises a pair of coacting rotatable lever-arms movable conjointly together and disposed externally of the movable-contact operator.

Claim 16

The combination according to claim 10, wherein the rotatable contact-operating lever has a contact-compression spring associated with the other end thereof.

Claim 17

The combination according to claim 14, wherein operating-lever means carries said contact-compression spring and has additionally a stud passing through the contact-compression spring and also passing through an aperture provided at the said other end of the rotatable contact-operating lever for providing contact compression in the closed-circuit position of the interrupter.

Claim 18

The combination according to claim 11, wherein the movable-contact operator generally comprises a cylindrically shaped metallic member having one end bore loosely surrounding the extremity of the movable-contact stem, an intermediate relatively reduced portion for accommodating a shank portion of the bolt, and an enlarged end portion for accommodating the head of said bolt.

Claim 19

The combination according to claim 16, wherein said bolt is a shoulder bolt having an enlarged-diameter portion and an end relatively-small-diameter portion, the relatively-small-diameter portion being threadedly secured into a tapped bore provided in the external extremity of the movable-contact stem.