摘要:
An adaptor for controlling electrical stress in an electrical power cable having reduced insulation thickness. The adaptor includes an insulative member and a semi-conductive member. The insulative member is configured to overlay an exposed portion of electrical insulation of the power cable to provide, in combination with the insulation of the cable, a total effective insulation thickness that that reduces electrical stress to a level the cable and cable accessory can withstand.
摘要:
Stretcher supporting and lifting apparatus normally stowed beneath the body of an ambulance has a frame in the form of a plurality of telescoping members fastened to and extendable lengthwise relative to the chassis of the vehicle and carries a lifting device on which a platform is mounted. The frame may be extended and tilted downwardly from a stowed position to the ground with the platform in its lowest position. The platform has guide tracks for the wheels of a transportable stretcher and the stretcher may be rolled onto the tracks and a patient supporting litter lowered onto the platform. The lifting device is then actuated to lift the platform and the stretcher to the desired height so that the wheels may roll onto the floor of the ambulance. After the stretcher has been moved thereon, the lifting device is lowered to lower the platform, and the frame may be tilted back to the horizontal position and retracted to its stowed position beneath the ambulance.
摘要:
The disclosure relates to an ejector pin retracting means for plastic molding dies and die cast molds; the retracting means being commonly known as an early return system for retracting ejector pins into a mold cavity into flush relationship with a surface thereof before a conventional laterally moving slide mechanism is actuated, and thereby preventing the slide mechanism from hitting the extended ejector pins and causing damage thereto. The invention comprises resilient means operable by a return rod, the resilient means being engageable by the rod and resiliently expandable to permit the rod to pass therethrough after the rod has applied sufficient force to the resiliently expandable means so as to retract the ejector pins into one of the mold cavities and into flush relationship with an inner surface thereof.
摘要:
Provided is a dead front cable terminal comprising a cable assembly and connector device in which the cable insulation shield and cable metallic ground of the cable assembly are electrically isolated from the portion of the outer semi-conductive layer of the connecting device that forms part of a chamber in which at least a portion of the cable assembly is located. The terminal is suitable for cross bonding.
摘要:
An article of manufacture includes a protective core having at least two end portions, a plurality of support cores, and at least one cold shrinkable material held in an expanded state over at least a portion of the protective core and at least a portion of each support core. One end of each support core interconnected with a corresponding end portion of the protective core. The support cores, the protective core, and the cold shrinkable material are collectively configured to circumferentially surround an apparatus such that the cold shrinkable material compresses over a portion of the apparatus in response to removal of one of the plurality of support cores from the corresponding end portion of the protective core.
摘要:
An assembly is provided that includes a tubular support core, a splice body configured to circumferentially surround the support core, a conductive shield sock comprising at least two overlapping layers and configured to circumferentially surround the splice body and a cold shrink jacket circumferentially surrounding the shield sock. The ends of the shield sock are located beneath the cold shrink jacket and the shield sock extends beyond both ends of the splice body. In some embodiments the shield sock includes folded portions that extend beyond the ends of the splice body.
摘要:
A fiber optic, Faraday-effect sensing coil has very low linear and circular birefringence, which remains stable over a wide range of temperatures. The coil is fabricated from a spun fiber having an effective linear beat length of 100 meters or more, and is annealed after being formed into the coil. The coil has improved discrimination for magnetic fields associated with electric current-carrying cables, and may be incorporated into an optical current transducer (OCT), either interferometric or polarimetric.
摘要:
Towing apparatus mounted on the rear of a towing vehicle for lifting and towing disabled vehicles includes an extendible boom assembly positionable beneath the undercarriage of the vehicle to be towed. The boom assembly is carried by a vertically and pivotably movable housing assembly mounted on the towing vehicle and is pivotable relative to the housing assembly. The boom assembly includes a number of extendible boom stages telescopically mounted within first and second stage boom members, the first stage boom member being pivotably mounted on the housing assembly. Second stage boom member is mounted within and pivotable relative to the first stage boom member about a vertical axis so as to move from side-to-side, the extendible boom stages moving with the second stage boom member. The first stage boom member has an enlarged mouth through which the second stage boom member extends, the large mouth permitting the second stage to have substantial sideways movement. The extendible boom members may be moved vertically, tilted relative to the vertical, moved side-to-side and extend and retract so as to provide a towing vehicle operator with a multitude of positioning capabilities.
摘要:
A control mechanism for a boat having a seat assembly to support a pilot provides an outboard motor which is directionally controlled by extension and retraction of a control cable with the control mechanism having a pedal which is generally planar on its upper surface receptive of the pilot's foot. A bracket mounts the pedal at a location below the seat assembly so that the user occupying the seat can position one of his feet on the pedal. A pair of switch surfaces are disposed on opposite sides of the pedal, each surface extending above the pedal surface so that lateral movement of the user's foot when positioned on the pedal can contact one of the switch surfaces. A switch associated with each switch surface can then be activated for directionally moving the outboard motor into different positions responsive to pressure applied to one or other of the switch surfaces applied by the edge of the user's foot. In one embodiment, the pedal and motor are remotely placed with respect to one another, and the pedal "communicates" with the trolling motor using radio waves. In that embodiment, a transmitter is carried by the foot pedal or similar pilot-operated control, and a receiver positioned near the motor activates a reversible motor to steer the trolling motor, preferably by cable extension/retraction.
摘要:
An improved mounting of the ceramic arc tube on a support rod attached to one lead-in within an outer vitreous envelope allows for thermal expansion. The inlead at one end of the arc tube is fastened to the support rod which serves also as conductor, while that at the other end extends through an insulating bushing supported from the rod and is connected by a curved flexible conductor to the other lead-in of the outer envelope. Differential thermal expansion is accommodated by sliding of the inlead through the bushing and flexing of the curved conductor.