Fusible switch
AssigneeSquare D Company
InventorsRussell Cox, Joseph C. Drilling, Ronald H. Reed
Life of this patent
Estimating the term…
Abstract
The following specification describes a fusible switch assembly having a thermoplastic base supporting a plurality of pivotal knife blades. A one piece thermoplastic arc suppressor housing common to a plurality of phases is also described together with arc suppressor plates snap fit in the housing and a common one piece thermoplastic rotor for moving the blades. The rotor is retained by engagement with the knife blades and walls of the base.
Claims23
A fusible switch assembly for use in a multiphase circuit comprising:
- an insulating base formed of an electrically insulating thermoplastic material including a platform wall having integrally formed spaced apart compartment walls to define adjacent compartments with each compartment corresponding to a respective phase,
- a line terminal in each compartment with each terminal secured to said platform wall adjacent one end of said platform wall,
- a respective switch contact in each compartment connected to each terminal and to said platform wall,
- a respective blade terminal in each compartment secured to said platform wall,
- a respective knife blade in each compartment pivotally carried by a respective blade terminal for pivoting movement about a common axis to engage and disengage each blade with a respective contact in response to pivoting movement of each blade in a respective direction,
- and a fuse clip in each compartment secured to said platform wall adjacent the end of said platform wall opposite said one end of said platform wall and connected to a respective knife blade terminal for extending an electrical connection from a respective line terminal to a respective fuse.
A fusible switch assembly for use in a multiphase circuit comprising:
- an insulating base formed of a thermoplastic material including a platform wall having integrally formed spaced apart longitudinally extending compartment walls to define adjacent compartments on one side of said platform wall each corresponding to a respective phase,
- a line terminal in each compartment with each terminal secured to said platform wall adjacent the opposite end of said platform wall,
- a respective switch contact in each compartment connected to each terminal and secured to said platform wall,
- a respective blade terminal in each compartment secured to said platform wall,
- a respective knife blade in each compartment carried by a respective blade terminal for pivoting movement about a common axis to engage each blade with a respective contact in response to pivoting movement of the blades in one direction and disengaging each blade from the respective contact in response to pivoting movement of the blades in the opposite direction,
- a rotor formed of thermoplastic material supported on said blades for pivoting said blades about said common axis in said one and opposite directions,
- a fuse clip in each compartment secured to said platform wall adjacent said one end of said platform wall and connected to a respective knife blade terminal for extending an electrical connection from a respective terminal to a respective fuse,
- a common arc suppressor housing having spaced apart side walls to define a respective arc suppressor chamber for each compartment,
- a plurality of spaced apart arc suppressor members,
- means snap fittingly retaining each member in a respective chamber,
- and means on said housing and base positioning each chamber and plates in overlapping relationship to a respective switch contact.
A switch assembly for use in a multiphase circuit comprising:
- an insulating base having a platform wall supporting a respective line terminal for each phase connected to a respective switch contact,
- a respective knife blade for each contact,
- integrally formed spaced apart compartment walls on said platform wall extending transverse to said platform wall to define adjacent compartments for a respective line terminal, switch contact and knife blade,
- a rotor overlapping said platform wall and formed of thermoplastic material having a plurality of passages each passing a respective knife blade to support said rotor on blades and for rotating the blades,
- a passage in each compartment wall enabling receipt of said rotor between said compartment walls,
- integrally formed means on said base journalling said rotor and restraining said rotor against longitudinal movement relative the said blades,
- and means securing each knife blade to said platform wall in a respective compartment for rotation by said rotor about a common axis to engage each blade with a respective contact.
A switch assembly for use with a multiphase circuit including an insulating base having a platform wall supporting a respective line terminal for each phase connected to a respective switch contact with each contact adapted to be engaged by a respective knife blade pivotally supported on said wall for rotation about a common axis with integrally formed spaced apart compartment walls projecting from said platform wall to define adjacent compartments for a respective line terminal, switch contact and knife blade, the improvement comprising:
- a one piece arc suppressor housing having a plurality of pairs of spaced apart integrally formed side walls to define a respective arc suppression chamber between the side walls of each pair for each compartment,
- an arc suppression member in each chamber with each member having a slot aligned with a respective switch contact and enabling a respective knife blade to pass through the respective slot for engagement with a respective switch contact,
- means on each side wall for supporting a respective member therebetween,
- and respective means integrally formed on each member and at respective positions on said housing for snap fittingly securing each member between a respective pair of side walls in response to movement of the respective member past a predetermined position relative a respective pair of side walls.
Dependencies are inferred from the claim text.