Abstract: A system and method for reducing kerf loss and controlling the tension and lateral vibration of an internal diameter saw blade by controlling the temperature of the blade while it is still rotating. The blade temperature is controlled by regulating the temperature of the cutting fluid flow associated therewith. In one embodiment blade tension is periodically measured and, when the tension falls below a predetermined limit, the temperature of the cutting fluid stream is decreased for a period of time until the tension increases to a preselected value.

Abstract: A heater for diesel fuel filter system has a thermally and electrically conductive heating plate mounted in a housing chamber so that diesel fuel flowing between the chamber inlet and outlet toward a filter normally passes over both sides of the heating plate in heat-transfer relation to the plate. Self-regulating electrical resistance heater discs of a ceramic material of positive temperature coefficient of resistivity are mounted on the plate in thermally and electrically conductive relation to the plate for heating the plate. The heater discs are arranged so that fuel passing through the chamber also flows directly over the heater discs.

Abstract: The disclosure relates to a method for making extrinsically doped HgCdTe alloys containing Cu, Ag, or Au or other dopant impurity whereby the excess tellurium in the core is annihilated (stoichiometrically compensated by excess in-diffusing Hg) and the dopant impurities are then permitted to randomly move through the slab to provide for homogeneity thereof. A post-annealing step of much greater than normal temperature-time length than was provided in the prior art is used. A standard post-annealing step in a saturated mercury vapor atomosphere leaves second phase tellurium (and gettered impurities) at the center of the slab, and longer term post-annealing negates this situation by annihilating the second phase tellurium in the slab and thus permitting the impurities to randomly travel by solid state diffusion throughout the slab to ultimately be distributed therein in a homogeneous manner.

Abstract: An electronic printer mechanism having a movable printhead assembly , wherein the printhead is a matrix of selectively heatable semiconductor mesas for producing dot matrix characters one line at a time on a paper medium. The electronic printer mechanism is constructed with a sectional housing including upper and lower housing sections which are releasably secured together to define an interior chamber for receiving components of the electronic printer. The lower housing section is provided with complementary sets of shaft-receiving recesses such that drop-in assembly of components with respect to the lower housing section as received in respective sets of the recesses prior to securement of the upper and lower housing sections together is accomplished. One component assembly comprises an operating shaft on which the printhead assembly including a carrier member fixedly supporting a printhead is mounted for transversing movement therealong.

Abstract: A cannon launched guided projectile having a gyro based electro-optical target finding and guidance system which includes an optical system carried by a gyro to provide target location information for an electronic system to produce gyro rotor torquing signals and for producing projectile guidance signals from gyro pickoff outputs is disclosed. The electronics system includes two difference channels for processing pitch and yaw signals responsive to the electrical output of a light detector and a sum channel for controlling the two difference channels responsive to target acquisition and master trigger signals.

Abstract: An integratable programmable attenuator includes in one embodiment a plurality of field-effect transistors coupled to a semiconductor resistor at spaced apart locations thereon, the semiconductor resistor forming one of the source/drain regions of each of the transistors. The other source/drain region of each field-effect transistor is selectively coupled to an input of a differential amplifier, the output of which is coupled to one end region of the semiconductor resistor. The gain of the differential amplifier is variable in predetermined steps according to which of the transistors is selected.

Abstract: The access hole for filling the liquid crystal cavity in an LCD having plastic front and rear members is sealed by welding the two members together. Pressure is applied during the weld to insure a good joint. The welding process avoids problems of non-adhesion or poor adhesion associated with the use of epoxy, especially the type of epoxy used for sealing glass LCDs.

Abstract: The invention relates to an apparatus with the aid of which tubular transport containers (10) having a substantially U-shaped hollow cross-section for DIL housings can be aligned prior to their filling or emptying. The apparatus comprises a first storage space (22) for the transport containers to be filled or emptied and a second storage space (65) for filled or emptied transport containers. A transport means (32, 33) is provided with the aid of which the transport containers can be conveyed out of the first storage space into the second storage space. At least one alignment means (50, 51) is provided which is equipped with at least one compressed air nozzle and produces an air flow which is directed from below against a transport container on its way from the first storage space to the second storage space. Under the influence of this air flow the transport container assumes a defined position in which the DIL housings disposed therein can be removed or introduced into said container.

Abstract: A system for measuring the flexure of a saw blade in situ includes in one embodiment a non-contact displacement sensor and means for directing a fluid flow at the blade adjacent the sensor. The deflection of the blade by the fluid flow is detected by the sensor which generates a signal related to blade flexure. The system indicates when a saw blade is correctly tensioned or when retensioning is required.

Abstract: A motor protector of the type having a snap acting thermostatic element is shown particularly adapted for use with compressor motors in which a conventional three pin header is mounted on the compressor casing to allow electrical energization of the motor. An improved heat transfer path is formed between the windings of the motor and the thermostatic element of the protector by suspending the protector from one of the motor pins in optimum heat conductive relation therewith and thermally separated from the compressor casing and any component mounted on the other two pins.

Abstract: A multicopy impact printer has a wire matrix stored energy printhead having circuitry for reducing the power requirement of the printhead. A permanent magnet is incorporated in the printhead to flex leaf springs each of which is attached to the corresponding activation end of a respective one of a plurality of print members. A coil is provided for each print member, being activated when selected, to provide a magnetic field in opposition to the magnetic field of the permanent magnet and of an amplitude sufficient to release the flexed leaf spring. The opposing field diverts the field of the magnetic coil into paths away from the activated coil, thereby increasing its intensity and requiring more current in other selected coils to release the corresponding flexed leaf springs. A common coil is connected at one end to one end of each of the printer element coils and wound and positioned to provide a field in opposition to that of the permanent magnet.

Abstract: An electric switch or commutator actuated by bimetals for one or several temperatures of response comprises a cap support for one or several bimetallic disks of a well known type which cooperates with a base made of one piece, the base comprising a substantially cylindrical part disposed to join with the cap support for mounting the bimetallic disks and having rivets extending through the cylindrical base part into an integral part of the base which mounts fixed and movable contacts of the switch and which is disposed to support also the connecting terminals and a covering and protecting element with snap-action insertion.

Abstract: A current to frequency converter having an operational amplifier with two inputs, an output, and a feedback capacitor connected between one input and the output to produce an output voltage waveform having a rate of change proportional to the input current between a first and second predetermined voltages. A level detector and active switching devices to detect the second predetermined voltage level and reset the voltage level of the waveform to the first predetermined voltage level. The level detector produces an output signal when the second voltage level is reached. The output signals form a digital pulse stream having a frequency proportional to the input current.

Abstract: A digital system is disclosed for programming a non-volatile memory, such as a programmable read only memory (PROM), while it is in situ in the operating system of which it forms a part. The digital system includes a read/write (R/W) memory and a non-volatile memory which communicate with one another through a two-way data communication bus. Data, address, and circuit select signals are provided to the R/W memory to enter information therein. Upon completion of entry of the data (e.g., a control program) into R/W memory, timing circuitry provides selective signals, such as circuit select, program pulse and program voltage signals to the non-volatile PROM memory and the data or control program is transferred to the PROM memory without removing the PROM from the system. Additional circuitry allows this data or control program stored in the PROM memory to be transferred back to R/W memory, modified and then transferred back to PROM memory.

Abstract: A system for real-time digital signal processing employs a single-chip microcomputer device having separate on-chip program ROM and data RAM, with separate address and data paths for program and data; however, the accumulator in the data path may be used as a program address source for table look-up, for example. An external program address bus allows off-chip program fetch in an expansion mode, with the opcode returned by an external data bus. A bus interchange module allows transfer between the separate internal program and data busses in special circumstances, such as accumulator addressing. The internal busses are 16-bit, while the ALU and accumulator are 32-bit. A multiplier circuit produces a single state 16.times.16 multiply function separate from the ALU, with 32-bit output to the ALU. One input to the ALU passes through a 0-to-15 bit shifter with sign extension.

Abstract: A semiconductor memory device of the single-chip MOS/LSI integrated circuit type has both serial access and random access means on the same chip. When the device is addressed for random access then data input or output is the same as in dynamic RAM operation, but if the address is for serial operation then access is different. For a serial read operation a row containing the addressed data is transferred to a shift register coupled to the random access array, and the shift register is clocked out. For serial write, data is clocked into the shift register then this row of data is transferred into the columns of the array.

Abstract: An integrated circuit package having a large number of external connections is assembled using two lead frames stacked one atop the other. The lead frames have complementary lead patterns which interdigitate to provide a very close lead spacing at the periphery of a semiconductor chip on which a complex integrated circuit is fabricated.

Abstract: A circuit is disclosed for driving a piezo ceramic device as used in smoke alarms or other audio warning devices. The circuit detects the resonant frequency of the piezo horn and provides an alternating current at the resonant frequency of the horn for maximum sound output. The circuit has a self starting resonant oscillation characteristic. Two pairs of switches act in concert to alternatingly connect each side of the piezo horn to the supply voltage and ground, causing the maximum voltage swing across the piezo horn to be effectively twice the available power supply voltage.

Abstract: A dynamic metal oxide field effect transistor clocking circuit provides at least one output at a fixed time interval after receiving an input. This clocking circuit includes a first stage which further includes a node connected to the first stage output and circuit capability to charge the node and conditionally discharge the node upon receiving an input. A second stage is connected to the first stage so that the output of the first stage provides the second stage input. The second stage also consists of a node that is charged by circuitry in the second stage and is conditionally discharged upon the occurrence of the input received from the first stage. The second stage includes the capability to block the discharge of the second stage when the first stage discharges without the requirement of a second discharge clock.

Abstract: A fuel supply system for an automotive engine has a heater which is energized, deenergized and then reenergized in sequence to heat a thermostat metal coil spring over a selected temperature range to regulate opening of a carburetor choke during engine warm up. The heater operation causes the choke to start to open quickly to enhance fuel economy, then to open more slowly to enhance engine driveability as engine warm up occurs, and finally to complete opening in a rapid fashion to enhance fuel economy when engine driveability is assured after engine warm up has taken place. Contacts are connected between a power source and the heater and a pair of dished bimetal elements having central apertures therein are arranged in facing relation to each other between the contacts, the bimetal elements being adapted to move to inverted dished configuration as they are heated to respective different temperatures within the noted temperature range.