Interlock system for metal enclosed switchgear having a fuse drawer and sliding panels

Claim 2

An interlocking fuse and switch system comprising: a support structure, a fuse drawer slidable horizontally on said support structure, a fuse carried by said fuse drawer, a switch having a switch blade pivoted on said support structure to one side of said drawer, contact means interconnecting said fuse and said switch blade, a panel vertically slidable on said support structure alongside of said fuse drawer, overlying said switch and permitting access thereto when removed, manual means for operating said switch blade between closed and open positions including a pivoted member having closed and open positions corresponding to closed and open positions of said switch blade, fuse drawer locking means connected to said pivoted member for unlocking said fuse drawer when said pivoted member is in said open position and locking it when said pivoted member is in said closed position, panel locking means preventing removal of said panel, and means for unlocking said panel locking means when said fuse drawer has been opened to a predetermined position.

Claim 3

The interlocking fuse and switch system according to claim 1 wherein means prevent movement of said pivoted member to closed position while said fuse drawer is open.

Claim 4

The interlocking fuse and switch system according to claim 1 wherein means operable in response to closing movement of said fuse drawer lock said panel in place.

Claim 5

The interlocking fuse and switch system according to claim 1 wherein said fuse drawer locking means includes: a notched latch plate secured to said fuse drawer, a drawer latch pivoted on said support structure for entering the notch of said latch plate to lock said fuse drawer closed, and a connecting member between said pivoted member and said drawer latch.

Claim 6

The interlocking fuse and switch system according to claim 1 wherein said panel locking means includes: a lockpin endwise movable into and out of locking engagement with said panel, a lockpin lever connected to said lockpin, a shaft pivoted on said support structure having said lockpin lever secured thereto, an arm secured to said shaft, and detent means on said fuse drawer for engaging said shaft for moving said lockpin between locked and unlocked positions with respect to said panel.

Claim 7

The interlocking fuse and switch system according to claim 5 wherein means on said panel engage said lockpin when said fuse drawer is closed with said panel removed and prevent movement of said panel to fully-closed position.

Claim 8

The interlocking fuse and switch system according to claim 1 wherein said fuse drawer locking means includes: a notched latch plate secured to said fuse drawer, a drawer latch pivoted on said support structure for entering the notch in said latch plate to lock said fuse drawer closed, and a connecting member between said pivoted members and said drawer latch, and said panel locking means includes: a lockpin endwise movable into and out of overlying relation to a part of said panel, a lockpin lever connected to said lockpin, a shaft pivoted on said support structures having said lockpin lever secured thereto, and detent means on said fuse drawer for engaging said arm to pivot said shaft.

Claim 9

The interlocking fuse and switch system according to claim 7 wherein said fuse drawer locking means includes: a second notched plate secured to said fuse drawer, a second drawer latch pivoted on said support structure for entering the notch in said second latch plate also to lock said fuse drawer closed, and a link interconnects said pivoted latches, and a detent on said shaft is arranged to engage said second drawer latch while said fuse drawer is open to prevent movement of said pivoted member to closed position while said fuse drawer is open.

Claim 10

An interlocking fuse and switch system comprising: a support structure, a drawer slidable horizontally on said support structure intermediate its ends, a fuse carried by said drawer, a switch on each side of said drawer each having a switch blade pivoted on said support structure, contact means interconnecting said fuse and said switch blades, a panel vertically slidable on said support structure along each side of said drawer, overlying the respective switch and permitting access thereto when removed, manual means for operating each switch blade between closed and open positions each including a pivoted member having closed and open positions corresponding to closed and open positions of the respective switch blade, fuse drawer locking means connected to each pivoted member for unlocking said fuse drawer when each pivoted member is in the respective open position and locking it when each pivoted member is in its closed position, panel locking means individual to each of said panels preventing removal thereof, and means for unlocking each panel locking means when said fuse drawer has been opened to a predetermined position.

Claim 11

An interlocking fuse and switch system comprising: a support structure, a drawer slidable horizontally on said support structure intermediate its ends, a fuse carried by said drawer, a switch on each side of said drawer each having a switch blade pivoted on said support structure, contact means interconnecting said fuse and said switch blades, a panel vertically slidable on said support structure along each side of said drawer, overlying the respective switch and permitting access thereto when removed, manual means for operating each switch blade between closed and open positions each including a pivoted member having closed and open positions corresponding to closed and open positions of the respective switch blade, fuse drawer locking means connected to each pivoted member for unlocking said fuse drawer when each pivoted member is in the respective open position and locking it when each pivoted member is in its closed position, panel locking means individual to each of said panels preventing removal thereof, and means for unlocking each panel locking means when said fuse drawer has been opened to a predetermined position.

Claim 12

The interlocking fuse and switch system according to claim 9 wherein means prevent movement of each of said pivoted members to its closed position while said fuse drawer is open.

Claim 13

The interlocking fuse and switch system according to claim 9 wherein means operable in response to closing movement of said fuse drawer lock each of said panels in place.

Claim 14

The interlocking fuse and switch system according to claim 9 wherein each fuse drawer locking means includes: a notched latch plate secured to said fuse drawer, a drawer latch pivoted on said support structure for entering the notch of said latch plate to lock said fuse drawer closed, and a connecting member between each pivoted member and the respective drawer latch.

Claim 15

The interlocking fuse and switch system according to claim 9 wherein said panel locking means includes: a lockpin endwise movable into and out of locking engagement with the respective panel, a lockpin lever connected to each lockpin, a shaft pivoted on said support structure having each lockpin lever secured thereto, an arm secured to said shaft, and detent means on said fuse drawer for engaging said arm to pivot said shaft for moving said lockpin between locked and unlocked positions with respect to said panels.

Claim 16

The interlocking fuse and switch system according to claim 13 wherein means on each panel engage the respective lockpin when said fuse drawer is closed with either of said panels removed and prevent movement of the respective panel to fully-closed position.

Claim 17

The interlocking fuse and switch system according to claim 9 wherein each fuse drawer locking means includes: a notched latch plate secured to said fuse drawer, a drawer latch pivoted on said support structure for entering the notch of said latch plate to lock said fuse drawer closed, and a connecting member between each pivoted member and the respective drawer latcH, and said panel locking means includes: a lockpin endwise movable into and out of locking engagement with the respective panel, a lockpin lever connected to each lockpin, a shaft pivoted on said support structure having each lockpin lever secured thereto, an arm secured to said shaft, and detent means on said fuse drawer for engaging said arm to pivot said shaft for moving said lockpins between locked and unlocked positions with respect to said panels.

Claim 18

The interlocking fuse and switch system according to claim 15 wherein each fuse drawer locking means includes: a second notched plate secured to said fuse drawer, a second drawer latch pivoted on said support structure for entering the notch in said second latch plate also to lock said fuse drawer closed, and a link interconnects said pivoted latches, and a detent on said shaft is arranged to engage said second drawer latch while said fuse drawer is open to prevent movement of either of said pivoted members to closed position while said fuse drawer is open.