In one embodiment, there is provided a method for storing program information in a memory associated with an electronic program guide system. The method comprises partitioning the memory into two areas, wherein a first of said areas is structured to hold records of a first type, each comprising a first subset of information about a program including a partial title therefor, and wherein a second of said areas is structured to hold records of a second type, each comprising a second subset of info...

A system is disclosed for transporting solid particles having a size range from 1/10 micron to 22 mm. in diameter, including a feed hopper formed of an inverted cone frustum, a cylindrical tube, and an inverted cone, a source of solid particles contained in the feed hopper, a transparent pipe inserted into the feed hopper coaxially with the axis of the feed hopper, fluid introducing pipes for introducing fluid such as gas or liquid into the bottom of the feed hopper including a spout inlet feed ...

The present disclosure is directed to a machine for making green sand molds by an impact mechanism which imparts an impact from an impact head driven by the explosive force of suddenly released compressed air in such a way that the molding head strikes the sand and imparts its kinetic energy by way of an impulse to the sand, thereby packing the sand around the patterns. It has been discovered that by using the impulse principle in molding, the sand is uniformly packed and uniform mold hardness r...

A self-propelled pavement cutting machine comprising a drive truck having a front end having an upright sliding coupling with the rear of a vehicle having an elongated cutter for cutting bumps or grooves, the vehicle having front wheels and rear wheels. When the cutter is active, the vehicle is supported by its two sets of wheels, depth control means being provided for the cutter. The truck has a pump supplying hydraulic fluid to raise and support the rear end of the vehicle with its cutter and ...

An hydraulic system is provided to perform the functions of vehicle propulsion and steering and of cutter rotation and height control in multiple grooving of pavement. Multiple cutter heads are controllable individually for use individually or in gangs. The load is distributed over a plurality of engines, each of which drives pumps for hydraulic motors adapted to rotate individual cutter heads separately or in unison.

A crane has a hoist rope which passes over a boom to a drum driven by a hudraulic motor and including a brake. The crane includes means for releasing the brake when the free end of the rope is a given distance below the crane, and has means for relieving hydraulic pressure from the motor in response to the horizontal radius of the free end of the rope so that at a given radius the motor can lift only a given maximum load.

The invention pertains to optical fiber transmission systems, and is particularly relevant to optical transport systems employing optical amplifiers. In particular the invention teaches an apparatus and method that allows cost effective co-directional operation of an optical amplifier to support full duplex traffic on a single fiber, and the design of an optical fiber transmission system based on this optical amplifier technology.

A safety control mechanism for a load line forming part of an extensible boom crane which has a plurality of sections moved relative to each other by power means. The cable supports a load supporting member on one of the crane sections and is reeled or unreeled from a driven drum supported adjacent another of the sections. The safety control means incorporates mechanism which will render the power means inoperative when the tension on the cable reaches a certain level. The safety control means c...

An apparatus for irrigating a local irrigation site includes a suction/irrigation tip that is removably connected to a suction/irrigation handpiece. The tip includes a connector to detachably connect the tip to the handpiece, a suction tube detachably connected to the connector, and an irrigation tube permanently fastened to the connector. The tip may also have a securing clip to prevent the irrigation tube from bending during use, and a retaining finger to partially connect the tip to the handp...

The invention provides a method for preparing amorphous semiconductors by (a) activating a semiconductane gas using a activator to produce mononuclear, reactive fragments or gaseous condensation products which serve as precursors for the deposition of an amorphous semiconductor; and (b) controlling the temperature of the activator and the flow rate and temperature of the semiconductane gas so that it does not completely decompose upon the activator.