Abstract: Methods and devices for using less-than-perfect memory chips and packages in the manufacture of memory modules. In the preferred method the failed I/O lines in primary memory packages are disconnected and replaced by selected I/O lines from flawless or partially defective backup parts all mounted on the same module. The various processes comprise sorting of partially defective parts according to the results of wafer or packages test, judicious distribution of backup parts on a PC board module and routing of their I/O lines, optimized patching techniques and multi-level tests and repatching routines. The methods and processes are equally applicable to Chip On Board assemblies as well as package assemblies.

Abstract: In vertical boat growth of GaAs single crystal ingots, graphite powder, in selected amounts, is included in the charge to establish directly related planned target electrical characteristics in the as grown ingots. The electrical characteristics correspond to concentrations of carbon in the as grown ingots.

Abstract: A hand operated garment folding table for processing knit upper garments comprises an adjustable width bed and a pair of fixed arms. Offset hinges couple the arms to the bed.

Abstract: Improved commercial single crystal wafers (250), as shipped to end users form a full circle, and comprise a "stress concentration notch" (172) which accurately defines a desired cleavage plane. The stress concentration notch is introduced into the wafers in bulk by means of a properly oriented cut along the length of a single crystal ingot, after machining the ingot to the desired end product diameter, and prior to sawing the ingot into slices. The stress concentration notch uniquely defines the first and second faces of the wafer.

Abstract: Improved commercial single crystal wafers (250), as shipped to end users form a full circle, and comprise a "stress concentration notch" (172) which accurately defines a desired cleavage plane. The stress concentration notch is introduced into the wafers in bulk by means of a properly oriented cut along the length of a single crystal ingot, after machining the ingot to the desired end product diameter, and prior to sawing the ingot into slices. The stress concentration notch uniquely defines the first and second faces of the wafer.

Abstract: A fluorescent light fixture 203 replaces a PAR lamp in an existing installation without the need to rewire the installation. The replacement fixture includes a screw-in plug corresponding to the standard base of a PAR lamp and wiring between the plug and the new fixture. A tubular member receives and attaches to a PAR fixture at one end thereof; and attaches to a replacement fixture at the other end. The tubular member has stepped inside diameters to accept a variety of fixtures; and a set screw and locking nut lock the adapter to the PAR fixture.

Abstract: A fluid transfer assembly comprises two parallel fluid transfer paths and a shared, linear path actuator for providing positive sequencing of input and output valves of both paths. Corresponding valves of the two paths share a lever assembly which is rotated between first and second positions by reciprocal movement of the liner path actuator.

Abstract: A cellular telephone call administration system processes detailed call records from a cellular switch as the calls are processed. This arrangement expedites automatic, electronic distribution of detailed call records to resellers and service provider billing facilities and to the roam billing clearing house. The call administration system, without operator intervention, provides a metered billing class of service to customers as an aid to controlling their cellular communication expenses; and provides for registration of roam sets for service on a cellular switch without need for a billing agreement with the set's home carrier.

Abstract: A cellular telephone call administration system processes detailed call records from a cellular switch as the calls are processed. This arrangement expedites automatic, electronic distribution of detailed call records to resellers and service provider billing facilities and to the roam billing clearing house. The call administration system, without operator intervention, provides a metered billing class of service to customers as an aid to controlling their cellular communication expenses; and provides for registration of roam sets for service on a cellular switch without need for a billing agreement with the set's home carrier.

Abstract: A gas driven pump (102) is controlled by an asynchronous controller (101). The controller (101) has two control conduits (105,103) respectively in communication with the bottom and top regions of the chamber of the pump (102). Low pressure air is bubbled through the control conduit (105) in communication with the bottom region of the pump chamber; therefore, the pressure in that conduit, which is applied to the face top of the diaphragm (111), in a direct function of the depth of the liquid in the pump chamber. The other control conduit (103) is in communication with the bottom face of the diaphragm (111). When the difference of the pressures in the control conduits (105,103) exceeds the bias of the spring (114), the diaphragm (111) and the attached spool (128) move downward to activate a mechanically operated pilot valve (144). The pilot valve, in turn, releases supply air under pressure to switch the main valve (145) from the rest state to the operated state to initiate discharge of liquid by the pump.

Abstract: A printer ribbon cartridge arranged to house an endless band of ribbon formed in a mobius loop which enables different halves of the width of the ribbon to be presented for printing during successive cycles of the ribbon past a printing position.The ends of the ribbon are joined in a lap splice so that the cut end of the half of the ribbon presented for printing trails as it passes the printing position.

Abstract: An integrated transistor circuit arrangement provides a multicollector transistor with Schottky diodes and ohmic connections selectively formed at the collector terminals. In the illustrative example, a vertical transistor is formed in an N-type epitaxial layer overlying an N+ substrate. A through-extending region of P+ material encircles the region of the epitaxial layer in which the vertical transistor is formed. The base of the vertical transistor is formed by the implanting of P-type impurity in a location spaced apart from the surfaces of the epitaxial layer. The resulting base has a symmetrical profile relative to the faces of the epitaxial layer. Therefore, the transistor may be operated with the collector at the surface without penalty of electrical operation. In the illustrative example, a PNP lateral transistor is utilized as a current source for the vertical transistor.

Abstract: Symmetrical integrated transistors and drive circuitry provide low loss bilateral analog crosspoints for a switching matrix. Each crosspoint comprises a high performance PNP lateral transmission switching transistor and an associated NPN vertical drive transistor formed over a common n-type buried tub in a p-type substrate. Individual crosspoints, including the transmission transistor and the drive circuitry, are isolated by means of frame shaped p-type isolation regions lying outside the buried tub. The collector of the NPN drive transistor and the base of the PNP transmission transistor are ohmically connected by means of the buried tub. Accordingly, although the transmission transistor and the drive transistor are merged in a single isolation region, current drive to the PNP transistor is by means of the NPN transistor as a functionally independent device.

Abstract: Several embodiments of isolated lateral transistors are shown. The emitter and collector electrodes of each embodiment are formed in the same processing step as the region which isolates the transistor from other structures. Consequently, the emitter and collector electrodes are each relatively heavily doped and extend to an underlying buried layer over which the transistor is formed. The heavy doping and the deep penetration of the collector and emitter diffusions tend to increase transistor efficiency; and since the emitter and collector electrodes are formed in the same processing step as the isolation diffusion, there is a reduction in processing complexity.

Abstract: A semiconductor transmission circuit arrangement which utilizes symmetrical transmission transistors and bias circuitry which exhibits a high output impedance and is arranged to maintain equal d.c. bias currents in the base and the emitter/collectors of the transmission transistor. A multiple collector transistor is utilized as a primary current source and a current mirror circuit is used as a control arrangement.

Abstract: An integrated transistor circuit arrangement provides a multicollector transistor with Schottky diodes and ohmic connections selectively formed at the collector terminals. In the illustrative example, a vertical transistor is formed in an N-type epitaxial layer overlying an N+ substrate. A through-extending region of P+ material encircles the region of the epitaxial layer in which the vertical transistor is formed. The base of the vertical transistor is formed by the implanting of P-type impurity in a location spaced apart from the surfaces of the epitaxial layer. The resulting base has a symmetrical profile relative to the faces of the epitaxial layer. Therefore, the transistor may be operated with the collector at the surface without penalty of electrical operation. In the illustrative example, a PNP lateral transistor is utilized as a current source for the vertical transistor.

Abstract: A test set is disclosed for measuring read/write head skew in a magnetic tape recording system. Read head skew is measured by reading a reference tape having substantially identical alternating signals recorded in all tracks thereof and measuring the time between the receipt of signal peaks of corresponding portions of the signals read from any two tracks of the reference tape. Pulses from a high frequency oscillator are counted during the time between the signal peaks to obtain counts which are representative of the read head skew. These counts are averaged over a number of cycles of the alternating signals and displayed on a digital display. Write head skew is measured by writing an alternating signal onto two tracks of a magnetic tape and reading the two tracks with a properly aligned read head.

Abstract: A matcher circuit for comparing two binary signals which are presented to two separate units is disclosed. The matcher circuit comprises two half matchers, one in each unit. Each half matcher circuit detects one of the two possible mismatch conditions. The two half matcher circuits are connected by a single wire which is connected to the output of a gate in each half matcher such that the wire is a tied collector AND gate thereby allowing bidirectional information flow on the wire.

Abstract: A system is disclosed for serving special service calls such as collect, person-to-person and charge-to-third number on a wholly automatic basis without any operator intervention normally being required. The system requests specific information from the calling party such as, his or her name for collect calls, and utilizes the received answers in the formulation of additional announcements to the "called" subscriber. The system is responsive to information received from the called station or third party station for instituting billing for the requested call after a connection is established between the calling and called stations.

Abstract: An adaptable exerciser for a memory system utilizes the error rates of independent memory segments to selectively exercise the segments at different frequencies. Each memory segment has an associated counter which is incremented with errors and decremented at a predetermined rate with time. If the count accumulated in a counter reaches a specified level, the associated memory segment will be exercised at a higher frequency. If the count in any counter should reach a second higher specified level, the associated memory segment is removed from service.