Abstract: A rotary joint for a decoking tool. The rotary joint includes a seal assembly that has one or more primary seals and one or more secondary seals. The secondary seals become operative upon the presence of a leak in the primary seals such that the rotary joint can continue to be used until a scheduled maintenance outage. A selective vent is used to route leaking fluid so that one or the other of the primary and secondary seals can be activated.

Abstract: A rotary joint for a decoking tool. The rotary joint includes a seal assembly that has one or more primary seals and one or more secondary seals. The secondary seals become operative upon the presence of a leak in the primary seals such that the rotary joint can continue to be used until a scheduled maintenance outage. A selective vent is used to route leaking fluid so that one or the other of the primary and secondary seals can be activated.

Abstract: A lubricant flinger, for providing lubricant fluid to bearings on a horizontal shaft within a wet-sump bearing housing, has a rotationally balanced body with portions extending radially sufficiently to reach below a lubricant level in the wet-sump. The body has provisions for fixing it on the horizontal shaft and is capable of insertion, while mounted on the horizontal shaft, into the housing through a bearing bore of radius smaller than that of the body. Outer portions of the body may have features which enhance lubricant pick-up.

Abstract: A system for lubricating bearings on a vertical rotatable shaft within a bearing housing, is comprised of an annular lower lubricant sump at a lower portion of the bearing housing; an annular upper lubricant reservoir at an upper portion of the bearing housing; and a conduit providing fluid communication between the lower lubricant sump and the upper lubricant reservoir. Provision is made for metering a flow of lubricant from the upper lubricant reservoir into upper bearings. The lubricant is pumped from the lower lubricant sump, through the conduit, to the upper lubricant reservoir at a rate exceeding the rate of metered flow into the upper bearings. A constant head of lubricant above the metering orifice is provided in the upper lubricant reservoir, as well as an outlet for shunting excess lubricant back to the lower lubricant sump.

Abstract: A rotary connector for selectively coupling a rotating pipe to a stationary pipe includes a housing for interconnection to the stationary pipe. A rotary stem is disposed within the housing for providing a fluid communication path between the rotating pipe and the stationary pipe. The rotary stem is selectively removable from the housing without removal of the housing from the stationary pipe. A seal is provided and is interconnected to the rotary stem and disposed between the rotary stem and the housing for sealing the rotary stem within the housing. The housing seal is selectively removable from the housing with the rotary stem. The rotary connector further includes a rotary flange for interconnection to the rotating pipe for selectively mounting the rotary stem to the rotating pipe for the transfer of torque to the rotary stem. The rotary stem can be selectively removed from the rotary flange without removal of the rotary flange from the rotating pipe.

Abstract: An efficient power supply employs a high current switching transistor to pulse a flashlamp for optical pumping in lasers, such as an Nd:YAG laser at high pulse repetition frequencies. The pulsing circuit offers a simple, flexible, and precise means of pump pulse control. Flashlamp simmer current is provided from the constant dc voltage source with a resistor in parallel with the switching transistor.

Abstract: Diffraction-limited output beam quality is achieved with a laser having an elongated homogeneous active medium pumped through two optically plane, parallel faces and situated within a resonant cavity defined by a plane reflector at one end and a concave spherical reflector at the opposite end. For a ray of optical energy passing through the active medium, there is a plane containing the ray in which the effective optical length in the medium is greater than the effective optical length in the orthogonal plane containing the ray. The separation between the cavity reflectors is selected to form a stable resonator in one of these planes and an unstable resonator in the orthogonal plane.