Drawer-type circuit breaker arrangement

Claim 2

A drawer-type circuit breaker arrangement characterized by a housing (14) having a pair of horizontally disposed guide slots (14a) and a pair of vertically, extending notches (14b), intersecting said slots (14a) respectively, circuit breaker means (12) having roller means (13a, 13b) thereon in engagement with edges of said slots (14a) for supporting said circuit breaker means (12) in said housing (14), an actuating lever (23), pivotally mounted at each side of said circuit breaker (12) for pivotal movement about a horizontal axis (24), a guide roller (25) provided at one end of each lever (23) for travel along a respective one of said slots (14a) and intersecting notches (14b), first stop means (27) on said breaker means engagable by the opposite ends-of said actuating levers for locating said guide rollers (25) in said slots (14a), for movement along said slots during withdrawal or insertion of said breaker means in said housing, second stop means (28) on said housing adapted to engage each actuating lever (23) during insertion of said breaker means (12) to align each guide roller (25) with each notch (14b) so that upon pivoting each lever (23) said guide roller (25) thereon will enter a respective notch (14b) to move said circuit breaker means (12) further into said housing (14) and third stop means (29) engagable by each lever (23) to limit pivotal movement thereof and maintain each guide roller (25) in a respective notch (14b) in the final inserted position.

Claim 3

A drawer-type circuit breaker arrangement characterized by a fixed housing (14) having a pair of side walls with a horizontally disposed slot (14a) in each wall, circuit breaker means (12) movably mounted within said housing (14) and having roller means (13a, 13b) extending into said slots (14a) in engagement with the edges thereof for movably supporting said circuit breaker means (12), support rail means (16) slidably mounted on said housing means (14) for horizontal sliding movement parallel to said slot (14a) with the upper edge thereof in engagement with said roller means (13a, 13b), said support rail means (16), having a notch (21) in the lower edge thereof adjacent the forward end thereof and chamfer means on the bottom edge of said support rail means (16) adjacent the rear end thereof, latch means (17) pivotally mounted on said housing (14), spring means (18) biasing said latch means (17) into engagement with said notch (21) to prevent withdrawal of said support rail means (12) is fully engaged within said housing (14), said latch means (17) having one end portion (19), protruding above the upper edge of said rail means (16)for engagement by said roller means (13a) upon disengagement of j said circuit breaker means (12) and flange means (20) extending laterally from the other end of said latch means (17) under said rail means (16) so that upon engagement of said one end of said latch means (17) by said roller means (13a) said latch means (17) will pivot out of said notches (21) to bring said flange (20) into engagement with the bottom edge of said rail means (16) to allow withdrawal of said rail means (16) while still preventing movement of said roller means (13a) past said latch means (17) until said support rail means (16) is fully extended to bring said chamfer means adjacent said flange means (20) to permit further pivotal movement of said latch means (17) to allow said circuit breaker means (12) to be drawn outwardly onto said support rail means (16).

Claim 4

A drawer-type circuit breaker arrangement characterized by a fixed housing (14) having a pair of side walls with a horizontally disposed slot (14a) in each wall, circuit breaker means (12) movably mounted within said housing (14) and having roller means (13a, 13b) extending into said slots (14a) in engagement with the edges thereof for movably supporting said circuit breaker means (12), support rail means (16) slidably mounted on said housing means (14) for horizontal sliding movement parallel to said slot (14a) with the upper edge thereof in engagement with said roller means (13a, 13b), said support rail means (16), having a notch (21) in the lower edge thereof adjacent the forward end thereof and chamfer means on the bottom edge of said support rail means (16) adjacent the rear end thereof, latch means (17) pivotally mounted on said housing (14), spring means (18) biasing said latch means (17) into engagement with said notch (21) to prevent withdrawal of said support rail means (12) is fully engaged within said housing (14), said latch means (17) having one end portion (19), protruding above the upper edge of said rail means (16)for engagement by said roller means (13a) upon disengagement of j said circuit breaker means (12) and flange means (20) extending laterally from the other end of said latch means (17) under said rail means (16) so that upon engagement of said one end of said latch means (17) by said roller means (13a) said latch means (17) will pivot out of said notches (21) to bring said flange (20) into engagement with the bottom edge of said rail means (16) to allow withdrawal of said rail means (16) while still preventing movement of said roller means (13a) past said latch means (17) until said support rail means (16) is fully extended to bring said chamfer means adjacent said flange means (20) to permit further pivotal movement of said latch means (17) to allow said circuit breaker means (12) to be drawn outwardly onto said support rail means (16).

Claim 5

A drawer-type circuit breaker arrangement characterized by housing means (14), circuit breaker means (12), having roller means (13a, 13b) thereon for movably supporting said circuit breaker means (12) within said housing means (14), extendable support rail means (16) on said housing means (14) for supporting said circuit breaker means (12) through said roller means (13a, 13b) outside of said housing means (14) and latch means (17) pivotally mounted on said housing means (14) for engagement with said roller means (13a) and said support rail means (16) to initially prevent extension of said support rail means (16) when said circuit breaker means (12) is in a first position within said housing (14) and operable by said roller means (13a) upon movement of said circuit breaker means (12) to a second position within said housing means (14) to prevent further outward movement of said circuit breaker means (12) until said support rail means (16) are fully extended.

Claim 6

A drawer-type circuit breaker arrangement characterized by housing means (14), circuit breaker means (12), having roller means (13a, 13b) thereon for movably supporting said circuit breaker means (12) within said housing means (14), extendable support rail means (16) on said housing means (14) for supporting said circuit breaker means (12) through said roller means (13a, 13b) outside of said housing means (14) and latch means (17) pivotally mounted on said housing means (14) for engagement with said roller means (13a) and said support rail means (16) to initially prevent extension of said support rail means (16) when said circuit breaker means (12) is in a first position within said housing (14) and operable by said roller means (13a) upon movement of said circuit breaker means (12) to a second position within said housing means (14) to prevent further outward movement of said circuit breaker means (12) until said support rail means (16) are fully extended.

Claim 7

A drawer-type circuit breaker arrangement according to claim 3, characterized in that said latch means (17) comprises a latch lever (17) having a first arm extending (19) into the path of said roller means (13a), and a second arm having a laterally extending flange (20) underlying said support rail means (16) and in that said support rail means (16) is provided with a notch (21) adjacent one end thereof for receiving said lateral flange (20) on said latch means (17) to prevent extension of said support rail means (16), and in that a chamfered bottom edge adjacent the other end of said support rail means (16) adapted to be positioned adjacent said latch means (17) when said support rail means (16) are in a fully extended position.