Puffer type current interrupter

Claim 2

A puffer type current interrupter comprising: a pair of electrodes (36, 37) with their confronting surfaces formed in a substantially symmetric shape and with their confronting portions provided with contact bosses (36a, 37a); gas compressing means (33, 34, 35) which compress arc blasting gas in response to the contacts opening operation of said electrodes; an insulator nozzle (35) provided to cover one of said electrodes and having a throat which is positioned in the periphery of said bosses when said electrodes are in a closed-contacts state, said nozzle conducting the blasting gas supplied from said gas compressing means to an arc produced between said electrodes; and spring means (44) provided for at least one of said electrodes for providing a contact pressure between said electrodes.

Claim 3

A puffer type current interrupter according to claim 1, wherein said insulator nozzle has a throat which is positioned in the periphery of said boss of the other electrode than said electrode covered by said insulator nozzle.

Claim 4

A puffer type current interrupter according to claim 1 further comprising resistor means (39) conencted electrically in series to one of said electrodes.

Claim 5

A puffer type current interrupter comprising: a first and second electrodes (36, 37) with their confronting surfaces formed in a substantially symmetric shape, at least one of said electrodes having a contact boss which comes to contact with another electrode; gas compressing means (33, 34, 35) which compress arc blasting gas in response to the contacts opening operation of said first electrode; an insulator nozzle (35) provided to cover said first electrode and having a throat which is positioned in the periphery of said boss when said electrodes are in a closed-contacts state, said nozzle conducting the blasting gas supplied from said gas compressing means to an arc produced between said electrodes; means (47) for movably supporting said insulator nozzle so that said nozzle moves for a certain distance toward said second electrode by the action of the arc blasting gas supplied from said gas compressing means; and spring means (44) provided for at least one of said electrodes for providing a contact pressure between said electrodes.

Claim 6

A puffer type current interrupter comprising: a first and second electrodes (36, 37) with their confronting surfaces formed in a substantially symmetric shape, at least one of said electrodes having a contact boss which comes to contact with another electrode; gas compressing means (33, 34, 35) which compress arc blasting gas in response to the contacts opening operation of said first electrode; an insulator nozzle (35) provided to cover said first electrode and having a throat which is positioned in the periphery of said boss when said electrodes are in a closed-contacts state, said nozzle conducting the blasting gas supplied from said gas compressing means to an arc produced between said electrodes; means (47) for movably supporting said insulator nozzle so that said nozzle moves for a certain distance toward said second electrode by the action of the arc blasting gas supplied from said gas compressing means; and spring means (44) provided for at least one of said electrodes for providing a contact pressure between said electrodes.

Claim 7

A puffer type current interrupter according to claim 4, wherein said boss is formed on each of said electrodes, and said insulator nozzle has a throat which is positioned in the periphery of the contact position of said bosses when said electrodes are in a closed-contacts state.

Claim 8

A puffer type current interrupter according to claim 4, wherein said insulator nozzle gains a gas flow path from said gas compressing means by moving itself for a certain distance toward said second electrode.