Abstract: A pulse width digital to analog converter is constructed which provides an output clock rate that is a multiple of the input sampling rate. In one embodiment a latch is used to store N-bit digital word representing the analog signal value to be generated. (N-K) of the most significant bits are stored in a counter which decrements its count in response to a clock signal. A plurality of least significant bits of said digital word stored in said latch are applied to a logic circuit. A ring counter is utilized to indicate which section of the output signal is currently being generated.

Abstract: A phase locked loop circuit (16) includes means to eliminate harmonic frequency locking. The phase locked loop includes a voltage controlled oscillator (1) which provides an output signal (V.sub.out) which is compared with the input signal (V.sub.in) by a phase detector (4). The output signal from the phase detector is integrated and the output signal of the integrator (7) is placed on the control input lead of the voltage controlled oscillator. The output signal of the voltage controlled oscillator is provided to a frequency detector (14, 17) which determines if the output frequency is within a predefined range. If the output frequency is above the predetermined range, a limiter circuit (15) provides a low voltage output signal to the control input lead of the VCO in order to pull the input voltage of the VCO to a voltage which corresponds with the appropriate operating range of the phase locked loop.

Abstract: A flexibly suspended gyroscope apparatus comprises a fixed body (100), a rotary drive shaft (200) supported in said body, and a flywheel (220) mounted on said drive shaft by a rotary joint (222). The joint serves to retain the flywheel radially and to transmit rotary drive thereto, while leaving said flywheel free to oscillate with two degrees of freedom about a central position in which the axis of the flywheel is aligned with the axis of the drive shaft. The flywheel is also free for axial translation with one degree of freedom. Axial support means (101, 102, 103, 104) are provided for applying an axial force to the flywheel by electrostatic or electromagnetic induction, and axial position detector means are provided for detecting the axial position of the flywheel, said support means being servo controlled by said detector means to maintain the flywheel in a predetermined axial position.

Abstract: A second photoelectric element or cell (P2) is mounted in series with a first photoelectric element or cell (P1) of the prior art and in parallel with a portion of a voltage divider of which said first element is a part to shunt out a portion of the divider in response to light from a light load turned on by the operation of said first element incident to an increase in impedance thereof due to ambient darkness. Addition of the second photoelectric cell results in hysteresis of the turn-on/turn-off operating points of the first cell to prevent flicker to the light which is present at or near dusk in lights controlled by the prior art circuits. Mechanically, one cell (P1) is mounted on the side of a collar (21) surrounding the neck of a light bulb (13) outside direct light rays from the filament (23) while cell (P2) is mounted on the collar top in the direct path of light rays from the filament.

Abstract: A touch tablet (10) for determination of x-axis and y-axis coordinates of point touched includes a two-layer operating structure, each layer (11,21) containing a resistive bar (12,22) at an edge portion of an insulative substrate and a series of interdigitated conductive pathways (14,15) extending toward and away from the bar and an opposed conductive strip (13,33,43) on at least one of the layers. The bars and conductive pathways are orthogonally with respect to one another on each layer and further are orthogonal on one layer with respect to those bars and pathways on the other layer. A potential typically of 5 V is impressed on either one end of each of the resistive bars or on the interdigitated pathways.The two layers (11,21 or 31,41) are normally spaced from each other by insulative dots (6) on one facing surface or by an embossed peripheral ridge (56) on the top surface.

Abstract: A device for weight classification of crops comprising and endless conveying member, pick-up members for the products to be weight pivotally coupled with the conveying member and a mechanism for assessing the weight of the products located in and/or on the pick-up members, whereby a pick-up member is pivoted with the aid of a first pivotal shaft to a tie member, which is coupled with the aid of a second pivotal shaft extending at least substantially parallel to the first pivotal shaft with the endless conveying member in a manner such that the center of the pick-up member is located between the two pivotal shafts.

Abstract: A ball-circulated ball bearing assembly for infinite linear motion includes a track or guide rail extending straight and provided with a pair of guide grooves and a table sub-assembly which is provided with a pair of endless circulating paths, along each of which a plurality of balls are moved in circulation, thereby allowing the table sub-assembly to move along the guide rail however long it may be. In the preferred embodiment, the table sub-assembly includes a table, a three-part block member defining part of the endless circulating path, a retainer for retaining the block member to the table and a plurality of balls located in the endless circulating path. The retainer is preferably comprised of a shaped plate having a generally U-shaped cross section and having a pair of inwardly curved top edges which come into engagement with the table when assembled to keep the entire table sub-assembly resiliently integrated.

Abstract: A power supply uses first and second saturable reactor means connected to receive complementary first and second input voltages. The first saturable reactor means is disconnected from the first input voltage when the second saturable reactor means is connected to the second input voltage and vice versa. The power supply includes structure for sensing a variation in the power supply output voltage from a desired value and for producing a control signal in response thereto. A signal representative of volt-seconds, generated in a feedback path, is passed through both first and second saturable reactor means to adjust the flux in the particular saturable reactor means not connected to its input signal. This sets the initial flux in that saturable reactor means the next time it is connected to its input voltage. A change in the power to be supplied by the power supply causes a change in the time necessary to saturate each of the two saturable reactors.

Abstract: Interface circuitry is provided for interconnecting a source of positional data such as a touch tablet with a computer interface. The circuitry acquires voltages from the source of positional data which represent the data. An acquired voltage is compared with a ramped voltage. At the time of crossover the internal capacitor of the computer interface is rapidly charged above the threshold level to provide positional data from the external source to the computer interface.

Abstract: The present invention relates to new catalysts for the hydrotreatment of hydrocarbons, their preparation and their application.The catalyst for the hydrotreatment of hydrocarbons, according to the present invention, incorporates a refractory inorganic support combined with an active phase comprising a layer of uranium oxide and at least one oxide of a Group VIII metal. The active phase comprises a layer of uranium oxide fixed with a homogenous distribution on the said support through the intermediacy of direct --O-- bonds resulting from an impregnation of the support with the aid of an ethanolic solution of uranyl acetylacetonate.

Abstract: A single-shot circuit is fabricated as an integrated circuit except for a single capacitor requiring a single pin to connect to the on-chip circuitry. The single-shot is rendered independent of process variations and operating conditions by incorporating an analog feedback loop. The output of the single shot is detected by an analog circuit which includes a positive and negative voltage generator the ratio of whose voltages is a function of the desired duty cycle. The generators are actuated, respectively, when a pulse exists and when there is no pulse. The analog feedback circuit also includes an integrator for receiving and integrating the positive and negative voltages from the generators. The integrated and amplified voltages are fed back to the last stage of the single-shot circuit. When the duty cycle is high, the voltage that is fed back drives the single shot circuit to reduce the pulse width.

Abstract: A CMOS semiconductor structure having insulation sidewall spacers whose width is selected independently for NMOS and PMOS devices. The width of the spacer is selected to reduce hot electron injection in the N channel device and to insure that the gate and source regions are aligned with or underlap the gate in the P channel device. A narrower spacer is used for the P channel device than for the N channel device which permits the formation of a P channel device having a threshold voltage less than 1 volt.

Abstract: A sensor timer is provided for automatically turning on and off a lamp or alternatively for allowing the lamp to be manually turned on and off using the switch normally associated with the lamp. The sensor timer automatically senses the arrival of nighttime despite seasonal variations in the actual time of nightfall and automatically turns on the lamp a first selected time period after nightfall. The lamp is then automatically turned off a second selected time period after the lamp has been turned on or alternatively is turned on and off randomly during the second selected time period. The sensor timer can also dim the lamp. The sensor timer converts from automatic mode to manual mode in response to the turning on of the lamp through its manual switch thereby to allow the lamp to be controlled directly by the manually operated lamp switch. To convert the sensor timer from manual mode to automatic mode the lamp switch is turned on, off and on in rapid succession.

Abstract: A fall-through memory array comprising in a plurality of rows and columns a plurality of memory cells, each memory cell comprising a pair of cross-coupled transistors having three emitters, a collector and a base. Control potentials applied to a word line, coupled to each one of two of the emitters of each of the transistors, control the transfer of data bits from one row of such memory cells to another.

Abstract: A transducer actuator assembly (10) for a rotating disc memory apparatus has at least one pair of coils (40, 41) symmetrically spaced from a center plane of a linearly moving carriage (21) where the coils are stationary with respect to a fixed actuator base (11) and surrounding spaced center poles (34) of a magnetic pole piece flux return structure (31, 32, 33) having an E-Shaped configuration closed by pole plate (38). At least one pair of magnets (24a-d or 60, 61) are affixed to and extend horizontally from the sides (23) of the carriage and are spaced in longitudinally extending air gaps (45-48, 49) between the fixed coils and linearly extending pole piece portions (32, 33).Due to the low mass and small envelope size of the moving carriage-magnets subassembly and the removal of the heat generating coils from the carriage, very rapid access times with high location accuracies are possible along with minimization of magnet field effects on the memory discs being accessed.

Abstract: A touch tablet is provided containing two sheets of insulating material each of which contains a plurality of spaced apart conductive lines. A resistive strip on each sheet contacts and connects electrically one end of each of the plurality of conductive lines on that sheet. Each resistive strip functions as a potentiometer. Mounted between the two sheets and spaced apart therefrom is a conductive middle sheet. The first and second sheets are mounted such that the first and second sets of a plurality of conductive lines on these sheets are orthogonal to each other. A user presses on one of the two sheets to bring all three sheets into contact. The impedence of each potentiometer is a function of the contact point. The potentiometer is used as part of an RC circuit to provide a variable time constant representative of the coordinate of the contact point.

Abstract: A method and apparatus for measuring the inclination of the wheels of an automobile is provided. In accordance with one form of the present invention, there is provided a toe angle detecting device including a pair of detector plates which are normally spaced apart from each other to allow the corresponding wheel of the automobile to be located therebetween and which are pressed against the wheel from both sides when activated to determine the inclination of the wheel with respect to the longitudinal center line of the vehicle, i.e., toe angle of the wheel. In another aspect, a particular link mechanism is provided to interconnect four support members on which the four wheels of the automobile are placed, and the link mechanism is structured to determine the direction of the longitudinal center line of the automobile with respect to the reference line of the link mechanism.

Abstract: A method of assessing the body length by carrying out a length measurement, in which the length of the lower leg is measured and the measured leg is multiplied by a person-bound factor. A device for carrying out the measurement comprises a chair part a and a measuring part b, at least one of the parts a and b being adjustable in a direction of height and displaceable in a forward (backward) direction, said measuring part comprising one or two posts along which at least one measuring plate can be placed on the knee.