Abstract: A portable power tool for forming wire wrap type connections includes an electric motor, a torque transmitter and a casing for enclosing the electric motor and the torque transmitter. Removably mounted to the casing is a battery pack. The battery pack mounts both rechargeable and non-rechargeable batteries so that the battery charger may not be recharged in a physically compatible battery pack when non-rechargeable batteries are contained within the battery pack.
Abstract: A support system useful to interconnect interstage components in a centrifugal compressor. The system allows controlled balancing of pressure induced forces while accommodating thermal expansion and contraction. In one preferred form a support ring is mounted about a scroll volute but supported through tie rods from a conduit concentrically aligned with the volute. A second support ring is mounted about the conduit, facing but spaced from the first ring, and supported from the volute. The support rings are respectively sealed to the volute and conduit through O-rings which allow sliding axial motion. A grooved peripheral pipe coupling seals the space between the support rings. The surface area of the support rings can be selectively chosen to direct and control pressure forces within the compressor system.
Abstract: A process for manufacturing an incandescent lamp includes evacuating the lamp through a hollow space formed in the lower portion of the lamp to be sealed by press jaws and sealing the lamp with press jaws whose surface is substantially flat.
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 recessed remodeling light fixture adapted for mounting in an opening within a ceiling includes a cylindrical housing having a wall and an open end. The wall has a pair of opposed and aligned elongated slots disposed above the open end. A pair of spring clips is disposed in the slots and inside the housing during shipping and prior to installation. The clips are adapted to rotate outwardly for securing the housing above the ceiling in an installed position. Each of the clips has a wide body portion, a narrow leg member, and a foot portion. The leg member has a first bend adjacent the body portion and a second bend adjacent the foot portion so as to form a partial loop.
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 clip for retaining a light canister in a ceiling includes a bendable leg member which is positionable between a first position and a second position. In the first position, the canister is insertable into a hole in a ceiling and in the second position, the bendable leg member is moved away from the canister so as to retain the canister within the ceiling. A brace member extends between the bendable leg member and the canister to retain the bendable leg member in its second position.
Abstract: A luminaire includes a housing defining a cavity with an open end. A double acting reflector system is mounted in the cavity that includes a first reflector of a generally concave configuration. A light source is positioned in the upper portion of the cavity. The first reflector is configured to capture a substantial portion of the light emanating from the light source and reflect it downward. The reflector system also includes a second reflector extending down from a lower rear edge of the first reflector. The second reflector is configured to capture a portion of the light projected from the first reflector and reflect it outwardly and downwardly to help form a rectangular lighting pattern on a planar surface. A transparent, nonprismatic lens is included which is secured to the housing to cover the open end. The housing may include an aperture with a removable plug to provide access to the light source for connection of wires and the like.
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 manually actuated electrical conductor wire insulation cutting and stripping apparatus has an elongated housing adapted to be mounted on a conductor wrapping tool or connected to a pistol grip type handle. The housing supports a wire cut off blade assembly and an insulation cutting and stripping blade assembly which are actuated simultaneously by an elongated shaft extending in and supported by the housing and connected to a manual actuating lever. The insulation cutting and stripping blades are retained on the housing at one end thereof by a removable cover member which permits interchanging insulation cutting and stripping blades without major disassembly of the apparatus. The wire cut off blades are mounted on a movable support member and one of the wire cut off blades retains the other blade in a recess formed in the support member and connected to the shaft for rotation therewith.
Abstract: A sealed beam lamp having an outer envelope defining a gas-tight enclosure filled with an inert nonreactive gas at a pressure in the range of 5 to 50 Torrs, and an illuminating burner capsule mounted within the enclosure. The integrity of the gas-tight enclosure as well as the pressure of the gas is verified by creating a predetermined electrical potential within the enclosure to form a glow discharge in the gas if the gas pressure is within a predetermined range indicating the lamp is serviceable and an arc discharge if the gas pressure is in excess of the range indicating the lamp is defective.
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.
December 15, 1986
Date of Patent:
November 24, 1987
Melvin J. Helmich, William P. Ryan, David H. Marvin
Abstract: A lifting hook assembly has a hook member with a tapered shank portion. Surrounding the tapered shank portion is a plurality of wedge members which are retained orthogonally in position by a toroidal member and axially in position by a cap. A housing surrounds the toroidal member and provides for attachment of the lifting hook assembly to a chain, rope or the like.
Abstract: A plate lifting clamp has an eccentric cam with spaced apart rounded teeth having sharp crested edges which are provided with gauge marks extending into each tooth. Excessive wear on the teeth may be visually observed by comparing the worn portion of each tooth to the location of the gauge marks.