A seal assembly for a shaft supporting a rotary element comprises a sealing ring having an inner radial surface in contact with a seal surface of the shaft. The sealing ring comprising a disc shaped integral radial lip normal to the inner radial surface. A disc shaped seal shield is assembled in sealing contact with a first surface of the integral disc shaped radial lip and also in sealing contact with a first radial surface of an annular seal groove. An energizer positioned in the annular seal ...

A transparent heat-resistant resin optical materials having excellent heat resistance and dynamic characteristics, having negative birefringence and exhibiting a high refractive index and a high Abbe number, especially optical compensating members such as films, sheets and retardation films for LCD display element. The transparent heat-resistant resin optical material is made of a copolymer containing a specific olefin residue unit and a specific N-phenyl-substituted maleimide residue unit and h...

The present invention obtains an automatic mode switching of DC plasma torches through, which easily switches DC plasma torches to be run between a transmitting mode and a non-transmitting mode and put the switching device under the monitor and the control of a current sensor and a current level controller; the heat generated by the current passing through can be transferred by a non-combustible liquid driven by a pump and be cooled down through a heat exchanger; and, electric arcs is prevented ...

A control drive according to the related art does not have a potentiometer that allows a position of the motor or the driven wheel to be registered.The control drive (1) according to the invention allows a position of the motor or the driven wheel to be registered using a potentiometer (25) and a defined home position to be adjusted.

A method and system are provided for operating a transmission system having connected nodes. Channels are assigned for carrying traffic along the connections according to a multiple protection classes. Traffic may then be propagated over the connections in accordance with the assigned protection classes.

Disclosed is a node structure of an upgradeable wavelength division multiplexing system that can minimize the expense in implementing, maintaining, and upgrading the system. The node structure includes an interleaver for interleaving a plurality of optical signals received therein into a predetermined number of channels; at least one demultiplexer coupled to one of the output channels for demultiplexing the optical signals received thereto into a prescribed number of channels; at least one multi...

An optical transceiver providing a carrier; a cover couplable to a portion of the carrier to define a transceiver enclosure; and, an electro-optical assembly supported in the enclosure is provided. A coupling mechanism and cooperating structure are particularly adapted to define pivoting motion of the cover relative to the carrier, whereby interference of the cover and the electro-optical assembly is avoided. Methods of assembling the transceiver components are present.

The boiler nose or arch of a furnace projects into the upwardly flowing flue gas to form a restricted passage. Overfire air is introduced into the cavity or plenum of the boiler nose and flows to injection ports along the inclined surface of the boiler nose to provide overfire air for penetration into and mixing with the flue gases in the restricted flue gas passage.

A drill bit for use in earth-boring operations includes a threaded upper section removably connectable to a power source, and a shank section connected thereto and having a centrally disposed longitudinal axis. The shank section further has a lower portion extending substantially vertically and parallel to the axis and a plurality of notches spaced along a perimeter thereof. The present invention further includes a plurality of carbide buttons affixed to the plurality of notches respectively for...

A mechanism to alter the flight path of a projectile after launch. A plurality of fins are disposed around the projectile and are held in place by one or more caging wires, depending on fin design. In one embodiment, auxiliary fins are connected to adjacent main fins which are held in a stowed position. When released, the fins deploy and present a continuous surface to the airstream for maximum braking action. In another embodiment, each fin is divided into fin segments which are individually de...