Abstract: A luminaire comprises a reflector having a concave interior surface formed with bands of reflective facets. The bands are organized in groups to provide the desired illumination pattern and enable the reflector to be formed in a simple fashion. The groups of facets are organized in bands which extend arcuately around the interior of the reflector, each facet being oriented to reflect light to a desired luminance center on a roadway surface.

Abstract: An apparatus for detecting optical marks on a film support moved relative to the apparatus includes a light source and light detector for detecting optical marks on the film support, the light detector having at least one photoresponsive sensor arranged in fixed manner over the film track, the sensor having a number of photoresponsive elements arranged at right angles with respect to the direction of motion of the film track and which, without intermediate optics, are in the immediate vicinity of the film support. Part of the photoresponsive elements can be used for scanning the image marks or blips and another part for scanning the document parts or other black/white values in the document area of the film.

Abstract: A metal flat key with depressions arranged in the key shank for receiving radially displaceably tumbler pins located in the lock rotor for use as a mechanical key outside and as a mechanical/electronic key inside a closing means with additional electronic means arranged in the lock cylinder includes a casing (2B, 2A, 20, 21) for receiving an electronic assembly (5) and which is fixed to the key shank (1), the casing simultaneously being used as the key grip (2). The casing (2A, 2B, 20, 12) on the casing side to the key shank (1) has a connecting part (12) for receiving electric contacts (4) between grip (2) and key shank (1).

Abstract: An emergency lighting circuit includes a lamp which can be energized by a battery-inverter circuit upon power failure. The battery is connected to the inverter circuit and the lamp by operation of a relay which is connected to the rectifier supplying charging current to the battery. The rectifier is connected across the line in series with a ballast reactor. The circuit can be used as emergency lighting only or the lamp can be employed for normal lighting purposes and switched to the inverter power when line voltage is interrupted.

Abstract: An overhead wiring system for use in the suspended ceiling of a clean room includes a generally rectangular housing with closed top, side and end walls and a substantially open bottom. A plurality of movable panels are provided in the bottom to close the bottom wall, one or more of the panels having openings through which a power cord can pass. A barrier within the housing divides its interior into a wiring chamber and a power cord chamber, the wiring chamber having a terminal strip connectable with wires from an external conduit. A power cord is connected to the terminal strip, through the barrier and through one of the panels with a stress-relieving cord grip in each of the pass-through locations. The housing is supporting so as to be substantially coplanar with a suspended ceiling and without exerting stress on the ceiling.

Abstract: A residential HVAC system includes a heat pump having a compressor arranged to heat a domestic hot water vessel and to heat or cool a storage vessel which is connected to a heat exchanger within the residence. Temperature sensors are provided at critical locations throughout the system and current and voltage sensors are coupled to the power lines feeding the residence. A microprocessor controls the operation of the compressor and other components of the heat pump system in response to measured temperatures, in response to the level of energy supplied to the residence and in response to the existence of on- or off-peak time intervals to operate the compressor and/or resistive heating elements to condition the hot water and storage vessels for subsequent use and to control an interior fan to condition the space. Operation of the compressor is controlled during on-peak intervals as a function of the resident's life style as reflected in power usage and requested comfort level.

Abstract: A plurality of plates are placed in overlapping relationship in an elongated array extending along the spinal column or other body area to be protected. The plates are pivotally interconnected by joints which allow relative rotation to a limited extent between the plates and limited longitudinal movement between the plates so that the armor structure conforms to body changes during normal movements. Overextension is prevented by abutment of the plates against each other, limiting harmful movement of the protected body portions. An arrangement particularly adapted for protecting the spinal column is disclosed.

Abstract: A diode assembly includes a base plate in which a plurality of diodes are mounted in a circle, uniformly spaced. A heat pipe within the diode circle extends perpendicular to the plate and is surrounded by radiating, heat-dissipating fins extending radially outwardly to support rings. Insulators mounted on these support rings support conductive straps which are connected through fuses to the other sides of the diodes. The assembly provides complete electrical and thermal symmetry for the diodes. Three such assemblies can be mounted on a single, triangular base plate.

Abstract: An electrical connector has an electrically non-conductive outer housing and connector members recessed in one end of the housing. Electromagnetic interference shielding is provided by members surrounding the components within the housing including an electrically conductive grommet circularly contacting conductive braid on the cable to which the connector is attached and a sleeve which surrounds the wires within the housing and extends axially to the connector end. One of the connector prongs is designated as the ground prong and is electrically attached to the sleeve. Embodiments accommodating three and four wires are disclosed.

Abstract: An antenna arrangement for use in a bore hole to receive radar signals and produce electrical signals from which the incidence direction of the radar signals can be determined includes a cross coil arrangement with two coils having elongated sides mounted adjacent the outer surface of a cylindrical insulative probe body. In one embodiment, one cross coil assembly is used in conjunction with an omnidirectional antenna and an evaluation circuit. In another embodiment two axially aligned cross coil assemblies are connected to also be usable as an omnidirectional antenna.

Abstract: An armored cable dispenser includes a base, a drag plate fixedly attached to the base, a shaft extending upwardly from the base and a tray rotatably resting on the drag plate and surrounding the shaft. An annular rail is supported above the tray on vertical supports which contain a coil of cable on the tray. A central tube around the shaft supports a lid the edge of which defines an annular gap with the rail through which cable can be pulled. A removable lock holds the lid in place.

Abstract: The gasket for forming a weather resistant seal between a lamp and a lampholder having a socket therein, said gasket comprising a circular ring of flexible water resistant material and having a preformed section therein for mounting the gasket around the exterior of a lampholder and connecting said preformed section to a lip in the lampholder, said gasket also including a reduced cross-sectional area in the portion adjacent the lamp such that the reduced cross-sectional area readily provides a flexible member adjacent the lamp for forming a weather resistant seal.

Abstract: A trolley wire suspension hanger includes a rod bent to form two loops at opposite ends with a substantially straight portion in between, one loop being to go over the messenger wire and the other for holding a clip. The clip includes a V-shaped member bent from sheet bronze with a C-shaped latch member passing through a T-shaped opening in each leg of the clip. The ends of the clip are bent inwardly toward each other to engage grooves in the trolley wire, whereupon the latch member is rotated to clamp the ends of the clip member in place.

Abstract: A locking cylinder has contact means with a contact support, including one or more contact elements. Each contact element partially surrounds the circumference and is fixed and secured against axial displacement, but while allowing partial radial movement. A concentric contact guidance member with contact guides for the contact elements is rotatable with respect to a common centre but is fixed with respect to the contact support in the axial direction. The contact elements can be brought into operative connection with these contact guides.

Abstract: A self-threading polymeric fastener and blank therefor which can be used, for example, to support a wall plate over an electrical outlet or switch. The fastener blank comprises three portions, all integrally molded together, including a slotted head, a substantially cylindrical shank and a tapered tip. A helical thread is formed on the shank and tip by deforming the outer surfaces thereof without removing any significant amount of polymeric material therefrom. This is accomplished by rotating the tip and shank in a helically threaded bore, such as that provided in an outlet or switch. The polymeric fastener blank can be integrally molded with a polymeric wall plate to make their colors identical.

Abstract: A heat exchange system includes a compressor, heat exchangers, an expansion valve, a receiver and a reversing valve connected so that refrigerant can flow in either direction through the receiver, depending upon the direction of heat exchange. One embodiment of a receiver for the system includes a chamber with a first conduit connected to the top thereof and a second conduit connected to the bottom. The inner ends of the two conduits are substantially flush with the inner surfaces of the respective walls. The receiver is connected into the system so that the upper conduit acts as an inlet during cooling and an outlet during heating, the lower conduit performing the reverse functions. A second embodiment has both inlet-outlet conduits in the upper wall portion.

Abstract: A plurality of rod elements, an inflatable mattress and a cover are configured so that they can be assembled to form a stable raft having good flotation characteristics for supporting an adult individual while traversing a body of water. The components used to form the raft can be reassembled to form a tent. The components can also be disassembled and packaged into a compact, lightweight parcel for easy backpacking.

Abstract: A bed includes a support structure having longitudinally extending bearing beams on which a spring member rests. The spring member includes a plurality of side-by-side modules, each having upper and lower resilient, flexible strips held apart by a plurality of spacers. The spacers are offset from the bearing members so that the upper strip of each module hold the modules together to allow limited independent movement. A pad and a removable fabric cover is provided.

Abstract: A residential HVAC system includes a heat pump having a compressor arranged to heat a domestic hot water vessel and to heat or cool a storage vessel which is connected to a heat exchanger within the residence. Temperature sensors are provided at critical locations throughout the system and current and voltage sensors are coupled to the power lines feeding the residence. A microprocessor controls the operation of the compressor and other components of the heat pump system in response to measured temperatures, in response to the level of energy supplied to the residence and in response to the existence of on- or off-peak time intervals to operate the compressor and/or resistive heating elements to condition the hot water and storage vessels for subsequent use and to control an interior fan to condition the space. Operation of the compressor is controlled during on-peak intervals as a function of the resident's life style as reflected in power usage and requested comfort level.