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US 4,616,200 AGranted
Circuit breaker
AssigneeSquare D Company
InventorsJames V. Fixemer, Neil R. Palmer, Charles H. Wagner, John M. Winter
Life of this patent
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AssigneeSquare D Company
InventorsJames V. Fixemer, Neil R. Palmer, Charles H. Wagner, John M. Winter
Estimating the term…
An automatic electric side-by-side two-pole circuit breaker having an insulating casing formed from the complementary association of a base casing, an intermediate casing and a cover which provide a pair of mechanism receiving compartments in side-by-side association. Each compartment carries a pivotally supported operating handle which extends partially outward from the casing for external manual operation, a line terminal, a load terminal electrically connected to said line terminal, a stationary contact intermediate said line terminal and said load terminal and a movable blade which carries a movable contact on one end and has its opposite end connected to the handle. A releasably latched generally thin trip lever is pivotally mounted within the compartment and is releasable from its latched position to a tripped position to effect separation of the contacts. The trip lever includes an upstanding leg which is engaged by a protuberance on the handle for resetting the trip lever. The handle overlaps the trip lever as does the movable contact blade which has an extending top segment received in a recess of the handle for operation of the movable blade by the handle. A spring is connected between the generally J-shaped blade and the trip lever for snap action of the blade.
An automatic electric circuit breaker having a molded casing formed with barriers and recesses therein, a line terminal, a load terminal electrically connected to said line terminal, a stationary contact in said casing intermediate said line terminal and said load terminal, a movable blade within said casing having one end and an opposite end, a movable contact mounted on said one end of said blade and movable thereby into and out of engagement with said stationary contact, a releasably latchable generally flat, thin trip lever pivotally mounted in said casing and releasable from a latched position for movement to a tripped position to effect separation of said contacts, an armature releasably latching said trip lever in said latched position and movable to release said trip lever enabling said trip lever to move to said tripped position, a yoke carrying said armature and operably associated therewith to attract said armature to release said trip lever, said yoke connected to said load side terminal, a handle pivotally supported within and extending beyond said casing, said opposite end of said blade connected to said handle, a spring having a first end connected to said trip lever and a second end connected to said blade, said spring biasing said trip lever toward said tripped position, said trip lever including a shoulder portion adapted to be engaged by said handle to pivot said trip lever to said latched position, said handle including a protuberance extending from one end thereof in overlapping relationship with said trip lever and adapted to engage said shoulder portion of said trip lever to move said trip lever to said latched position.
An automatic electric circuit breaker having an insulating casing, a stationary contact within said casing, a movable blade carried within said casing, a movable contact mounted at a first end of said blade, an operating handle pivotally supported within said casing and extending outward therefrom, said handle manually movable from a first position corresponding to a closed circuit to a second position corresponding to an open circuit, an opposite end of said blade connected to said operating handle, a trip lever pivotally mounted within said casing and movable between a latched position and a tripped position, a current responsive mechanism operably associated with said trip lever comprising a bimetal, a yoke connected to said bimetal, and an armature pivotally associated with said yoke and attracted to said yoke in response to the passage of a predetermined level of electric current through said yoke, said armature operably associated with said trip lever to retain said trip lever in said latched position and release said trip lever in response to a predetermined overtemperature or overcurrent condition, a spring having one end connected to said trip lever and an opposite end connected to said blade, said trip lever comprising a relatively thin, flat main body portion positioned against said casing and having a shoulder portion extending upward from said main body portion, said handle including a protruding portion in overlapping relationship with said main body portion and operably associated with said shoulder portion to facilitate engagement of said shoulder portion by said protruding portion of said handle in response to movement of said handle from said second position to said first position to effect movement of said trip lever to said latched position.
An automatic electric circuit breaker having an open sided base casing formed of molded insulating material with recesses and barriers, said base casing including a main recess partially defined by a rear wall for support of a mechanism therein, a load terminal, a line terminal serially connected to said load terminal, a mechanism, a handle operably connected to said mechanism, said mechanism comprising:
An automatic electric circuit breaker comprising a molded case, a movable contact blade within said case, operating means for moving said blade between a first position corresponding to a closed circuit condition and a second position corresponding to an open circuit condition, overcurrent trip means for actuating said operating means to move said blade from said first position to said second position, said operating means including a pivotable trip lever retained in a first position in response to said blade being in said first position and movable to a second position in response to the release of said trip lever in response to a predetermined overcurrent condition to effect movement of said blade from said first position to said second position, said overcurrent trip means including a generally U-shaped yoke within said casing, and an operably associated armature for retaining said trip lever in said first position and for releasing said trip lever in response to a predetermined overcurrent condition, said yoke including a back wall, a first side wall and an opposite side wall, said opposite side wall including an extended portion at one end of said yoke, a tab extending at substantially a right angle from said extended portion in generally parallel planar relationship with said back wall, retaining means adjacent the opposite end of said yoke for retaining a flexible electrical connector, a flexible electrical connector connected to said extended portion of said yoke and extending along said back wall of said yoke and retained along said back wall by said retaining means, said flexible electrical connector connected at its opposite end to said contact blade.
An automatic electric two-pole circuit breaker comprising an insulating base casing having a central recess for receiving a circuit breaker mechanism, an intermediate insulating casing having a first side complementarily associated with said base casing and forming a first compartment between said base casing and said intermediate casing, said intermediate casing having a second side including a second central recess for receiving a circuit breaker mechanism, a cover having a first side complementarily associated with said second side of said intermediate casing and forming a second compartment between said intermediate casing and said cover, said first compartment and said second compartment each including the following:
An automatic electric circuit breaker comprising:
An automatic electric circuit breaker comprising:
An automatic electric circuit breaker comprising:
An automatic electric circuit breaker comprising:
An automatic circuit breaker comprising a casing having an integral recess formed therein;
An automatic electric circuit breaker comprising:
Dependencies are inferred from the claim text.