Abstract: A fiber-reinforced composite structure has two molded outer polymeric layers spaced apart from each other and defining a cavity therebetween. Each molded outer polymeric layer defines a sealing surface extending about a periphery of the respective layer, and the opposing sealing surfaces cooperate to define a hermetic seal extending about a periphery of the cavity. One or more multi-directional fiber reinforcement layers are adhesively attached in a discontinuous manner to each outer polymeric layer, and define a first region of the cavity extending between each respective outer polymeric layer and adjacent fiber reinforcement layer, and a second region of the cavity extending between the fiber reinforcement layers. A core is located between the two outer polymeric layers, and is made of a resinous core material capable of exhibiting a foamed character and a resinous character.

Abstract: An electronic programmable read-only-memory (EPROM) is provided having a field effect transistor with the gate electrode thereof coupled to a capacitor adapted to store charge produced in a channel region of the transistor in response to a logic state programming voltage applied between one of the source and drain regions and the gate electrode. The field effect transistor and the capacitor are formed in a common semiconductor body along with CMOS transistors. The field effect transistor has relatively heavy doped source and drain regions separated by an oppositely doped channel region. A gate electrode is disposed over the channel region. Lightly doped regions, having the same conductivity type as the source and drain regions, extend laterally from the source and drain regions to peripheral regions of the channel region to suppress generation of “hot” electrons in the transistor and the CMOS transistors.

Abstract: A shower drain assembly (10) is provided for use with a shower having a base drain opening. The drain assembly includes a drain fitting (12), an annular pressure plate (26), and an annular collar (28). The drain fitting has an upper lateral flange (14) and an upright cylindrical portion (16) extending downward from the underside of the flange. The cylindrical portion includes a number of shelves (18) extending laterally. Spaces (19) are available between shelves. The annular collar (28) includes an inner diameter with a number of ribs (30) extending laterally inward from the collar inner diameter surface. The collar also includes a number of holes (34), each hole being adapted to engage a corresponding fastener (32).

Abstract: A measurement system (1) has robotic system (3) mounted over a base plate (2) which provides a vertical height reference. In the optical head (8), a CCD camera (17) is adjustable to be pre-set in height. The optical head (8) also has an upper light source (18) comprising LEDs and a lower light source (25) comprising a white fluorescent lamp (26) for lateral component illumination. An air flow system (45) directs cooling air in a swirling motion around the tube. An image analysis computer (10) automatically performs various tests to co-ordinate optical and mechanical operation.

Abstract: A pack (10) of bottles (14) comprises a plurality of layers (12). Each layer (12) has its bottles (14) packed in a close packed side-by-side array, the array being hexagonal. The layers (12) are packed in a sleeve (18) of a plastics material. The sleeve (18) is selected to have a perimetral dimension slightly less than a peripheral dimension of each layer (12) such that the layers (12), once packed in the sleeve, are constrained against movement.

Abstract: A pack 10 of bottles 14 comprises a plurality of layers 12. Each layer 12 has its bottles 14 packed in a close packed side-by-side array, the array being hexagonal. The layers 12 are packed in a sleeve 18 of a plastics material. The sleeve 18 is selected to have a perimetral dimension slightly less than a peripheral dimension of each layer 12 such that the layers 12, once packed in the sleeve, are constrained against movement.

Abstract: A power door operator for multi-passenger mass transit vehicles, typically buses, features electric actuation of dual swinging doors. A manual activator having an ergonometrically correct actuating plunger, for emergency door opening, operates a sleeved clutch. Fixed to the sleeve clutch is a drive bar with arms having individually adjustable lengths. The drive arms actuate outboard door shaft levers on individual door leaf through door drive rods intermediate the door arms and drive arms. Each rod incorporates spherical rod ends. The drive arms also actuate limit switches establishing door opened and door closed circuitry for energizing the electric drive system. The adjustable length clutch door drive arms provide a convenient device for controlling door leaf closing sequence and residual or door holding force when the doors are in a closed position.

Abstract: A structural composite material is provided. The material comprises a thermoplastic layer, a layer of fibrous material spaced from the thermoplastic layer and a foam core disposed in the space between the layers. A resin impregnates and holds the layer of fibrous material together to form a fiber-reinforced resin structure. The foam core and the fiber-reinforced resin structure are integrally formed from a core material capable of having both a foamed character and a resinous character. A process for manufacturing the composite and a boat structure formed from the material are also provided.

Abstract: The microbalance includes a mounting having two vertically aligned elongated flexible metal tension members, the upper and lower ends of the tension members being attached to a fixed support. The attachment of one end of each of the tension members to the fixed support is carried out by a resilient tension means. A pivot crossbeam is fixedly attached to the balance beam, and the ends of the pivot beam are fixedly attached respectively to the tension members at points intermediate to the ends. Deflection of the microbalance beam is accommodated by flexure of the metal tension members.

Abstract: Apparatus for eliminating feedback in stage monitors for selected musical instruments includes filter networks for attenuation of a broad frequency range including the entire range of frequencies contributing to the feedback. A combination of high order low-pass and high-pass filters is used to pass fundamental and second order components of a selected instrument, while attenuating the undesired feedback frequencies as well as extremely low range frequencies capable of damaging a speaker. A pair of passbands is provided, and a pair of frequency bands is suppressed, the two pairs providing alternate attenuation and pass-bands. Active filters having operational amplifiers and frequency selective circuits are used, along with buffering and summing circuits, to attain the desired frequency characteristic.