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US 4,727,229 AGranted
Interrupter isolator
OwnerGeorge A. Hodkininventor
Life of this patent
Estimating the term…
Abstract
An interrupter/isolator assembly having a conducting member connected to one contact of a vacuum switch and movable to engage either an earth contact or an isolator contact incorporates a cam member for operating the conducting member and actuating the switch contacts, there being a degree of lost motion between the cam member and conducting member such that making or breaking of a current path between the second contact and either the isolator or earth contact occurs within the vacuum switch and not at the isolator or earth contact.
Claims4
An interrupter/isolator assembly comprising:
- a vacuum switch having a pair of actuatable switch contacts, a support for the vacuum switch, a conducting member connected electrically in use to one of the switch contacts and movable to engage one of an isolator contact and an earth contact, a cam member operable to effect the movement of the conducting member and to actuate the switch contacts, there being a degree of lost motion between the cam member and the conducting member such that, in use, the making or breaking of an electrical current path between another of the vacuum switch contacts and one of said isolator contact and said earth contact occurs within the vacuum switch and not at either the isolator or earth contacts.
An interrupter/isolator assembly, comprising:
- (A) a support;
- (B) an isolator contact and an earth contact mounted on the support in spaced-apart relation;
- (C) a vacuum switch mounted on the support and having a pair of switch contacts within the switch, one of the switch contacts being movable into engagement with another of the switch contacts to define a closed state, and being movable out of engagement with the other of the switch contacts to define an open state;
- (D) a movable electrically conducting member electrically connected to said one movable switch contact, and being mounted on the support for movement into engagement with the isolator contact to define an isolated state, and into engagement with the earth contact to define an earthed state;
- and
- (E) lost motion means operatively connected between the conducting member and said movable switch contact,
- (i) said lost motion means being operative for initially moving the conducting member to one of the isolated and earthed states, and for subsequently moving said movable switch contact to the closed state, and
- (ii) said lost motion means being further operative for initially moving the conducting member away from said one of the isolated and earthed states, and for subsequently moving said movable switch contact to the open state.
5 more elements
Dependencies are inferred from the claim text.