A copying apparatus capable of imaging copying both sides of a transfer material copy sheet. The apparatus includes a pair of cassettes commonly usable as a feeding tray and a discharging tray, and a mechanism for detaching said cassettes. A transfer material fed from a cassette loaded in a feeding station is image transferred and fixed while passing through a conventional copy processing route, and said material is reversed onto an intermediate plate in a cassette loaded in the discharging tray...

A fiber-reinforced metallic tape, and composites including a plurality of stacked and bonded tapes, characterized by inclusion of a layer which prevents contact of liquid metal with the reinforcing fibers during low pressure brazing.

A bridge type duplex signaling circuit having a transmitter for sending signals over a transmission line and a signaling receiver for receiving signals from the transmission line. The receiver includes two parallel connected comparator circuits each comprising NPN and PNP transistors wired in a configuration such that at least one of the two comparators responds to received signaling when the signaling voltage has been summed with a spurious voltage present on the line that shifts the signaling ...

An air core duplex reactor consisting of one, two or more sets of two rigid cylindrical coil assemblies disposed in concentric, radially spaced relation. All of the coils are electrically connected in parallel at one end and have individual connections for the respective sets of coils at the opposite end, one set of coils being interleaved with the other and each coil consisting of a rigid, longitudinally extending sleeve member having a coil wound on a portion of the length thereof extending fr...

Electrical resistor inks comprising a mixture of carbon black and a semi-conducting pyropolymeric inorganic material along with a vehicle consisting of a binder such as a synthetic resin or a varnish and a suitable solvent or oil, etc. are useful in forming resistors in electrical circuits, the resistor ink possessing a temperature coefficient of resistance of less than 500 ppm/.degree. C.

Electrical resistor inks comprising a mixture of a semi-conducting pyropolymeric inorganic material and a transition metal oxide along with a vehicle consisting of a binder such as a synthetic resin or a varnish and a suitable solvent or oil, etc. are useful in forming resistors in electrical circuits, the resistor ink possessing a temperature coefficient of resistance of less than about 500 ppm/.degree. C.

This invention relates to a duplex surge arrestor comprising two gas-filled surge arrestors showing commoned electrodes through which commoned electrodes extends a passage for conveying ionised gas from one arrestor to the other, and in which duplex surge arrestor the electrodes are of such shape, disposition and material that when an excessive dissipation of energy occurs on any two electrodes therein, the discharging electrodes melt and fuse together.

A duplex trailer hitch which provides a hook and a pivotable closure to receive a lunette, and a ball on the end of the end of the hook to receive a coupler.

The surface of a metallic base system is initially coated with a metallic alloy layer that is ductile and oxidation resistant. An aluminide coating is then applied to the metallic alloy layer. The chemistry of the metallic alloy layer is such that the oxidation resistance of the subsequently aluminized outermost layer is not seriously degraded.

Duplex copying by imaging one side of the original at a first exposure station onto a photoreceptor through a single first mirror path, then turning the original over around a document drum and exposing it on this drum to provide a second exposure station. The image from the second exposure station is imaged onto the same photoreceptor through a two mirror path for relative reversion of the image. This two mirror path is provided by fixing a second mirror adjacent the document drum and by tiltin...