Abstract: In a rapid restrike starter embodying the invention, a starting circuit applies a series of high voltage pulses, each of approximately the same magnitude through a transformer in series with the ballast and the high intensity discharge lamp to be started, a voltage triggered switch such as a sidac is used to turn the starting circuit on at a predetermined voltage, a second voltage triggered switch connected in series with the first acts in conjunction with a circuit comprised of capacitors and resistors to cause a series of resonant symmetric pulses each approximately the same magnitude as the initial pulse, the use of this oscillating pulse provides restrike performance at approximately two-thirds the pulse voltage otherwise required which improves long term reliability by decreasing the likelihood of socket arcing and insulation breakdown.

Abstract: An electric circuit breaker or switch is disclosed having a plug-in connection means with an auxiliary bolt-operated means for enhancing the electrical and mechanical connection between the circuit breaker and a panelboard terminal. A U-shaped terminal clip is mounted in an opening in the circuit breaker case. The terminal clip engages over and frictionally grips a stab terminal on a panelboard to provide an electrical connection. A C-shaped clamp fits over and partially encircles the terminal clip in such a manner that the free ends of the clamp arms project inwardly toward and contact the legs of the terminal clip. A screw, which may be non-conductive, is retained in a bore in the molded case of the circuit breaker, extends into the terminal clip opening and engages a threaded hole in the C-shaped clamp.

Abstract: A grounding mechanism for an electrical connector having a metal generally U-shaped spring contact mounted on a cylindrical rubber or neoprene connector body which is connected directly to the internal ground contact within the connector body. Resilient tips on the body act to bias the free ends of the spring contact outwardly. The free ends of the spring contact stay in contact with a rotatable collar mounted over the body due to the compressed nature of the pre-formed metal spring contact, as well as the radially outward force of the resilient connector body tips acting on the free ends of the spring contact.

Abstract: A hanger assembly 10 for suspending an inner pipe string 32 within an outer casing 16 from a particular location therein. The hanger assembly includes a hanger body 30 and an expandable locking assembly 46 comprised of a plurality of latching fingers 77 secured at their lower ends about the hanger body by a split retainer ring 48 which permits limited pivotal movement of the latching fingers about their lower ends. Each latching finger 47 is provided with a hook surface 71 adjacent its upper end adapted to engage an upward facing abutment 20 on the inner profile of the outer casing. The free ends of the latching fingers are urged outwardly by a circular spring 58.

Abstract: A lockdown loading ring mechanism for a dual crossover seal in a pressurized wellhead which comprises a segmented loading ring assembly 60 of a plurality of arcuate segments 60a arranged in circular fashion within the wellhead annulus between the dual sealing devices of a dual crossover seal assembly 40. The ends of adjacent segments are spaced to allow for contraction and expansion of the assembly. Each segment is actuated by at least one holddown screw 66 of a plurality of holddown screws disposed in radial array about the wellhead axis in equiangular spacing and an equal number of holddown screws are employed to actuate each segment.

Abstract: Disclosed herein is an apparatus which is adapted for controlling fuel flows for dual fuel compression ignition engines. The disclosed system includes a lag fuel governing system in conjunction with a lead fuel governing system which includes spontaneous motion metering means.

Abstract: An integrally formed fuse puller assembled to the insulating base of a fusible switch assembly with portions of said puller movable for disengaging a fuse from a fuse clip on said base.

Abstract: A lighting apparatus which provides high voltage pulses for starting a high pressure sodium lamp. The apparatus includes two capacitors, two blocking diodes, a voltage sensitive symmetrical switch, and multiple resistances across which pulses are distributed. The aforementioned elements are electrically connected together and with a tapped ballast reactor so that one of the capacitors charges through an impedance in the negative half-cycle, and thereafter, when line voltage goes positive, the other capacitor charges through an impedance equal to the sum of the multiple resistances. When the voltage of the capacitors reaches a predetermined voltage exceeding the breakdown voltage of the voltage sensitive symmetrical switch, the capacitors discharge. This discharge, because of an autotransformer relationship within the reactor, produces a high voltage pulse of predetermined height and width once per each cycle of the source voltage.

Abstract: A swivel fitting for electrical conduit and the like comprising a first fitting part having an axially extending tubular section and a second fitting part having a generally cylindrical axially extending section disposed in sleeved relationship within the tubular section of the first fitting part and having a distal end surface engageable with a transverse shoulder formed within the interior of the tubular section of the first fitting part. The second fitting part has a head portion with a generally annular channel for receiving the distal end of the tubular section of the first fitting part. The channel is delimited by a transverse surface which is axially spaced from the transverse end face of the cylindrical section so that in any position of the fitting, rainwater and other liquid spray will be prevented from intrusion into the interior wireway formed by the fitting.