Abstract: A memory network for a time division system. In memory for each time slot are stored the addresses of the telephone lines using that time slot. A call is processed by transferring addresses and control between time slots associated with various call functions such as registering dial pulses (register), supervising local calls (link) or supervising trunk calls (trunk). The addresses are sequentially brought from memory in the respective intervals representing the time slots in which the addresses are stored and retained in those time slots or transferred. For each time slot in which an address transfer occurs, a record of a transfer having been made is retained temporarily for that time slot. Reference is made to that record before a new address is stored in memory to prevent inadvertant errors causing address changes in memory.

Abstract: A transmitter receiver which can be used for a cordless telephone using radio communication. The receiver produces direct conversion from the radio frequency. Local oscillator frequency is modulated by an audio signal to be sent, the modulated signals being passed through a dual splitting and combining network. The splitting network has directional properties for duplex operation. The receiver processes the signals through a differential amplifier to cancel unwanted signals.

Abstract: A luminaire for roadway lighting using a one-piece reflector developing at least two collimated beams in each longitudinal direction. The collimated beams impinge on sloping faces of a refractor to diverge the beams into a regular pattern covering the street with a sharp cutoff at predetermined longitudinal distances from the luminaire. The refractor employs a compressed parabola comprised of radial sections of comparatively large focal length with steps and risers. The complex shape of the one-piece reflector may readily be produced by a reflector finish applied to a molded plastic matrix. In the luminaire, the prismatic surfaces of the inclined walls of the refractor diverge the formerly collimated beams in a carefully controlled manner to produce very uniform distribution of light.

Abstract: A luminaire for illuminating a surface area spaced from the luminaire nadir to a distance from its elevated mounting. The luminaire has an elongated light source with its axis substantially parallel to the surface being illuminated. A specular reflector disperses the light over a range from substantially the light nadir to a line about 73.degree. from the nadir. With the present construction, a series of beams, each of about 1.degree. in angular extent, is approximated to provide uniform light distribution over a designated angular spread with sharp cutoffs beyond the spread with a high utilization factor for the light generated. The reflector is configured to prevent reflected light from passing through the light source although beams of at least one section are directed in paths closely adjacent to the light source.

Abstract: A lamp socket adapted to receive a bayonet base lamp bulb for illumination uses on an automotive vehicle. The socket is essentially cup-shaped and of one-piece plastic construction. The bulb contacting terminal members and grounding ring are all adapted to be inserted from the bulb end of the socket. The terminal members snap into designated slots in the bulb receiving wall of the socket. The grounding ring is a unitary, formed member with terminals at both opposed ends. The grounding ring forms the wall into which the bulb base is inserted. With the terminal members and grounding ring in place, terminals are provided for the engagement with conductors of a printed circuit board. The terminals have spring contactors spaced in an annulus insulated and spaced from the bulb. The bulb imposes a locking pressure on the bulb terminals by pushing the terminals further into the assembly.

Abstract: A control apparatus for providing added service telephone features for stations of a multiple party line. Features provided are automatic number identification, party line privacy, fully selective ringing, remote station verification and disconnect and revertive calling. Apparatus to provide these features includes as the control logic, a conventional microprocessor acting on external logic and buffer memory interfacing with the line conductors. The external logic and buffer memory sense the input condition changes and provide signals indicative of these changes to the processor. The external logic and memory maintain a condition and monitor the line for condition change.

Abstract: A multi-link intercom with a sequencing logic circuit for controlling a solid state switching matrix to connect station through an available link. Control information from the stations is decoded and stored in a register under sequence control for completion of a connection from a calling station to a called available station over an idle link.

Abstract: For sending mail automatically, letters put in a sending station uncovered are scanned with a television camera tube, and the information is transmitted to storages in a telephone exchange. In the exchange, a numerical destination address written at a specified point is evaluated. With the aid of this destination address a path to the destination is set up automatically, preferably at night when there is little traffic, and the letter information is then transmitted. At the receiving station the information is reproduced and the letter is sealed before being delivered to the addressee.

Abstract: Each memory individually associated with a respective one of two processors of a centrally controlled switching system incorporates status buffers. Information relating to each call is stored in a pair of status buffers in each memory, the status buffers of each pair being interlinked by linkage information. In case of a partial or a total breakdown of the system without the memory of at least one processor being affected, a special recovery program is executed by the latter processor to clear not only all the calls which are not in conversation, or not in a supervision phase, but also all the calls in a conversation phase for which pairs of associated status buffers contain erroneous linkage information.

Abstract: A hinge mechanism for a luminaire for outdoor lighting which allows the lower housing including the lamp refractor to be pivoted to a position enabling access to the luminaire interior. When it is desired that the lower housing be detached, the hinge retainer is released to permit detachment of the lower housing. The hinge mechanism includes a transverse rod resting in a trough formed by one or more channel supports. To prevent the rod from being removed from the channel, a U-shaped spring holder is held in a position where each U leg normally extends over the opening of the hinge channel support. These spring holders retain the channel in the trough. To detach the hinge, the base of the U is manually grasped and retracted to withdraw the spring legs from its extending position. The rod in channel engagement may be detached to remove the refractor housing from the luminaire.

Abstract: A circuit for apparatus to be used with a key system line card for providing electrical isolation between the line circuit and the central office. The adapter responds to ring current from the central office to close a path to the line circuit to cause the line circuit to respond. The circuit provides two-way supervision responding to change of conditions either at the station or at the central office, and also provides a time delay to prevent the circuit from entering the hold condition improperly.

Abstract: A telecommunications exchange having a multiple stage switching network. Calls initiated within the exchange may be local calls to be completed internally, may be trunk calls to a central office or may be enquiry calls completed locally. For calls of the last type, a tone stage in parallel with the first switching stage of the network is used. Resistors each having one half the resistance of the subscriber line input resistance are connected to each inlet wire from the subscriber to the tone stage. The tone stage is used in local calls for providing tone signals and also used for enquiry calls. For providing d.c. bias to the speech wires, a pad stage is provided in parallel with the second switching stage. Resistances in the leads to this stage provide attenuation.

Abstract: A fault-tolerant clock signal distribution system for a plurality of equipment units is disclosed. Fault tolerance is achieved by independent bussing of clock signals from each of a pair of duplicated clock sources to a plurality of clock receiver units, each receiver unit associated with one of the plurality of equipment units and including sequential logic apparatus operative to examine the two clock signal trains bussed to the clock receiver unit and to ignore that signal train that phase lags the other. In case the phase leading clock source or its transmission bus fails, the remaining clock signal takes over. Because the outputs of the duplicated clock sources are distributed over separate busses, either source may comprise the phase-leading clock at any particular clock receiver unit.

Abstract: A system for preventing the free fall of the platen of a vertical molding machine in the event of failure of the connection between the drive rod and the platen. A hydraulic network is employed to enable the movement of the platen. The network employs a counterbalancing circuit to permit raising the rod and platen and for preventing the gravitational fall of the rod and platen. The operation of this hydraulic circuit is controlled by valves which transfer the hydraulic fluid between the two ends of the respective cylinders, and a storage tank (to store the difference in volume between the rod end and cap end of the respective cylinders). With fluid flowing from the cap end of cylinders to the rod end of said cylinders, the platen may descend. With fluid remaining in the cylinders, the piston and platen cannot descend without the fluid being transferred back to the other end of said cylinder by operation of an electrically controlled valving arrangement.

Abstract: Disclosed is a regulator mechanism for two window panels mounted in the door of an automotive vehicle. The panels are slidable independently of one another in a common plane between raised and lowered positions under the control of the regulator mechanism. Both window panels are operated by independently operable lever arms, both lever arms being mounted for rotation on a common pivot shaft. The lever arms are secured to respective sector gears, both sector gears also being mounted for rotation on the common pivot shaft. Each sector gear is driven independently of the other by a driving gear, the driving gears being angularly spaced from the pivot shaft to prevent operative interference between the operative end of each lever arm. The mechanism is mounted as a unitary assembly on a unitary mounting plate, the plate providing a support structure for the common pivot shaft and the respective pinion shafts.

Abstract: A time division network using time slot interchangers for interfacing between groups of terminal circuits and a time division highway and for interfacing between different time division highways. All interchangers are of uniform construction and each performs a conversion from one number of channels at one end to a greater number of channels at the other end. When highways of the same number of channels are to be interconnected, two interchangers are arrayed between the highways in series with the one end of the respective interchangers coupled together.

Abstract: A line current detector for use in telecommunications systems to monitor line condition. The detector uses an optical or photo electric device whose input is modulated by line current. A photo transistor, electrically isolated from the line, senses the modulated output of the detector to produce a condition responsive output. The optical device is preferably a liquid crystal device. The output sensor is isolated from the line.

Abstract: A time slot interchanging network for use in digital switching. Two shift registers are used, one coupled to receive information from the incoming highway, the other coupled to feed information to the outgoing highway. The shift registers are identical in bit capacity and coupled in parallel. A circulating memory operative at the clock rate of the registers is synchronized with the incoming register to control transfer gates feeding the outgoing register.

Abstract: A weatherproof terminal or junction box structure for a luminaire adapted for connection by a mast to a building or pole. The structure enables access to the terminal or junction box area for wiring and inspection without disassembly of the mounting of the luminaire to the mast and without the necessity of disassembling the luminaire itself. The mast telescopes within a channel receiver of the luminaire housing for mounting purposes. The mast is slotted at its entry end, the slot being encompassed within an access opening which may be covered by a wire way cover. Removal of the cover exposes the wiring for connection and inspection. With the cover in place, recessed within the receiver, the connection of mast to luminaire produces a weatherproof mounting. A second embodiment omits the need for the cover by normally setting the entry end slot rotated out of registration with the channel opening. Access to the slot may be had by rotating the luminaire about the axis of the channel receiver.

Abstract: A hookswitch mechanism adapted to be operated responsive to movement of the cradle of a telephone instrument. The hookswitch mechanism has a plunger, axially operable to open and close contacts. The movable contacts are rectangular strips mounted on the movable plunger body. A housing encloses the plunger body and mounts the stationary contacts adjacent the ends of the contact strips. The mechanism is mounted on a bracket which also supports the cradle for pivotal movement thereby ensuring the relative positioning and alignment of cradle and hookswitch mechanism.