Abstract: An electrical switching apparatus includes a transductor circuit that senses a direct current between at least one input terminal and at least one output terminal and outputs an alternating current proportional to the direct current between the input terminal and the output terminal. The electrical switching apparatus also includes an alternating current electronic trip circuit configured to control pairs of separable contacts to separate based on the alternating current output from the transductor circuit.

Abstract: A system for monitoring operation of an internal combustion engine having a rocker arm assembly for actuating an engine valve is disclosed. The rocker arm assembly includes a first arm with a first end, a second arm also having a first end pivotally connected near the first end of the first arm, a latch that when latched secures the first arm relative to the second arm in a latched mode, and when unlatched allows the first arm to move relative to the second arm in an unlatched mode. The system also employing a sensor attached to one of the first and second arms that can detect when the arms are moving relative to each other, and adapted to provide a signal indicating the sensed movement.

Abstract: The disclosed concept pertains generally to secondary terminal blocks and, more particularly, to apparatus and methods for isolating the secondary terminal blocks and associated wiring in electrical switching assembly enclosures. The apparatus includes a housing having an outer surface structured to form a cavity therein. The apparatus is positioned in an enclosure which includes an electrical switching apparatus and one or more secondary terminal blocks. The one or more secondary terminal blocks are positioned in the cavity such that the apparatus at least substantially isolates the one or more secondary terminal blocks from the electrical switching apparatus. Further, the apparatus is effective to substantially isolate the secondary terminal blocks from temperature and pressure effects resulting from an arcing fault occurring in the enclosure.

Abstract: A cylindrically curved rectangular face seal is provided for a cross-ported barrel type rotary valve member. The seal has a central flow orifice therethrough with an annular raised rib formed about the orifice and extending in a radial direction from the concave inner face of the seal. The opposite edges of the seal extending in an axial direction each have a notch or rib thereon for axial sliding engagement in grooves provided in the valve body. The annular rib about the orifice accommodates dimensional variation in the valve parts to ensure a rotary sliding seal on the rotary valve member.

Abstract: A remotely controllable circuit breaker has a set of secondary contacts in series with the main contacts and which can be opened and closed from a remote location by a magnetically latchable solenoid. A pivotally mounted operating member/indicator member coupled to the plunger of the solenoid by a non-magnetic pin has an extension which projects through an opening in the circuit breaker housing to provide an indication of the open/closed state of the set of secondary contacts and an operator for manually closing them.

Abstract: A controller having a housing with a cover plate attached and a user moveable control shaft extending from the housing. The cover plate has a spring member with tabs attached which permits the cover to be attached to the housing over the shaft and the assembly shaft inserted into a clearance hole in a panel to which it is to be attached and pivoted into locking tabs on the panel and the spring tabs cammed along the panel surface deflecting the spring until the spring tabs drop into an aperture provided in the panel, locking the cover plate and housing to the panel.

Abstract: A gaseous fuel burner with a base formed of cast aluminum and a wafer cooperating with the base for forming an annular of flame generating ports. A cap is received over the wafer and forms a dead air space for reducing the temperature rise of the cap. The wafer and base are formed of aluminum or brass and the cap is either formed of cast iron or cast aluminum with a porcelainized steel disc insert on the upper surface.