Abstract: A tradesman may identify which circuit is connected with any number of outlets or other terminations in an electrical wiring system, such as commonly found in buildings, through the use of a handheld, carry-about detector-indicator device. Operation relies upon having prearranged excitation of each of several circuits typical of the usual building power distribution through introducing unique tag signals into each of the various wiring circuits by connecting a tag signal exciter to the building's wiring, usually at the main power box. The tradesman then may merely walk about and "plug" the indicator into various outlets or, by a suitable adaptor or clip leads, connect with lamp receptacles and the like, whereupon the indicator will give display of a "number", for example between "1" and "8", or some other such display which will promptly tell the user which circuit his detection indicator is coupled with.

Abstract: The totalized count obtained from a seriate train of signal pulses is stored in a programmable memory means as a permanent state change in a separate memory cell for each count increment. Memory economy is had since each count increment preferably is stored in its respective memory cell as a singular bit change. Display of the totalized count is provided, usually as visual digital characters, through decoding and displaying of the memory address byte signal. When power has been interrupted, or the memory address has otherwise been upset, the totalizing counter is reset. It then quickly runs-up, under control of a CLOCK signal, through all the changed state memory cells until the lowest order yet unchanged cell is addressed, whereupon a state detector produces a signal that inhibits the clock and enables the display of the instant memory address thus obtained.

Abstract: Apparatus and method for producing color proofs electrophotographically. A platen carrying an electrophotographic member is translated sequentially past functional stations including a charging station, an exposure station, a toning station, a transfer station and a cleaning station. Once toning is completed, the platen carrying the toner image is translated to the transfer station. An intermediate transfer medium is disposed at the transfer station as the sole receptor of the toner image from the electrophotographic member. A roller effects transfer engagement between the intermediate transfer medium and the toner image carrier. Direct transfer mode or offset transfer mode electively is provided at the transfer station. For offset mode, the toner image on the photoconductive layer involves first transfer to the intermediate transfer medium and from the latter to the transfer medium.

Abstract: Electrophotographic imaging apparatus, particularly for color proofing, is provided for normal daylight operation including a light-tight housing having a framework mounting plural spaced functional processing stations for charging, imaging, toning, transfer and, optionally, cleaning, all interior of the housing. A platen assembly mounting an electrophotographic member is translated along a linear path, the assembly being guided by a rail and a track secured along the entire length of the framework. A copyboard is disposed below the carriage within the imaging station and carries a transparency. The electrophotographic member is translated past the charging station for charging same and brought to the imaging station where the copyboard is raised, to establish an intimate engagement with the member established and exposed to an interior disposed radiant energy source.

Abstract: Driving aid apparatus for determining the best, most economical operating conditions for a motor vehicle equipped with an automatic transmission. The input member rotational rate of a torque converter coupled with the automatic transmission is measured. The rotational rate of the output member of the torque converter is also measured. A distinct difference may normally exist between these two rates, when a load is applied to the torque converter output, due to "slip" through the torque converter. The extent of this slip is in part proportional to the torque transmitted through the torque converter and, therefore, by a determination made from the difference between the two rates in combination with other key parameters affecting torque converter performance, the relative engine output torque can be found.

Abstract: A method and apparatus for producing a uniform elongate corona is provided. The apparatus includes at least one stationary corona electrode coupled to a supply of corona voltage. A moving ground electrode having a series of equally-spaced grounding points is coupled to a bias circuit that returns to ground. The moving ground electrode may be arranged to form a helix on a motor-driven insulating rod, with the longitudinal axis of the rod parallel to the stationary elongate corona electrode at a predetermined distance therefrom. The supply of corona power provides a high negative D.C. voltage or a series of high frequency negative high voltage pulses. The preferred bias circuits include one of a self-bias provided by a high resistance; a high frequency pulsating D.C. power supply circuit; or a fixed value negative D.C. power supply circuit.

Abstract: A metal detector apparatus particularly adapted as a locator of small, usually obscure, isolated objects such as treasure items, antipersonnel mines, weapons, shrapnel, and other such items. The detector is of the portable transmitter-receiver type having a dual balanced receiving loop, together with a transmitter loop co-balanced relative with the receiving loop arrangement, whereby the unique loop sensing setup, together with a dual channel receiver, provides a separate "right" and "left" bearing indication to the operator of the obscure object's whereabouts. The imbalance between the normally balanced loop arrangement electromagnetic fields, brought about by the nearby presence of a metallic object acts to produce a relative indicative difference in each receiving channel which provides the bearing, while the relative combined indication magnitude gives an indication of proximate distance between the detector and the sought object.

Abstract: Portable concealed structure locating and surveying translator apparatus, useful for tracing the bearing and lay of cables, pipes, and other expansive structures. The translator responds to the electromagnetic field radiating from a buried structure which is excited by a constant amplitude, fixed frequency high frequency a.c. signal. The translator is directional, providing bearing indication in its preferred form. Two noncoincident receiving loops, or inducers, are closely oriented to receive the structure radiated field lines with differing positional related efficacity. The received signal levels produced in each of the receiving loops is coupled with a receiver which includes a provision for the automatic, digitally advanced, sequential step-by-step change in overall sensitivity through a range of discrete values of responsiveness.

Abstract: A method and apparatus is provided for toning a latent electrostatic image on an exposed photoconductive surface of an electrophotographic member, using liquid toner comprising toner particles suspended in an electrically insulating liquid dispersant. Plural, generally identical, toner modules are arranged side by side at a first level, each module comprising a toner tray having a development electrode mounted on the upper surface thereof. The development electrode has a planar upper surface. A motor operates an articulated linkage which causes the tray to be elevated to a second level for toning, one of the modules being selected from the others. Antifriction bearing surfaces are mounted on the upper surface of the tray at opposite ends of the development electrode. The antifriction surfaces extend upwardly of the development electrode a short distance slightly above the upper surface thereof to define a gap between the development electrode and the surface to be toned.

Abstract: Documents are encoded with at least one thin, transparent coating, normally invisible, but having a readily detectable physical characteristic such as, electrical conductivity, electrical impedance, electrical capacitance, electroluminescence. Each document consists of a substrate on which is applied (1) at least one of the thin coatings, and (2) conventional printing, preferably intaglio. The thin coating may be applied before or after the printing. The coating includes particles driven into the surface to a substantial depth. The uncoated substrate is free of the detectable physical characteristic. The coating is confined to a limited area of the substrate surface and itself constitutes a code or is laid down in a pattern for identification. A second coating can be applied so that all areas of the surface have the same appearance to mask visual detection of the first coating.

Abstract: Ignition foiling device which serves to interfere with the efficient operation of a vehicle ignition system after a brief, predetermined period of time has elapsed subsequent to the unauthorized start-up of the vehicle engine. The foiling device thereby serves to thwart the theft, or other confiscative act directed at a protected vehicle, through first allowing the vehicle engine to start-up in an apparently normal manner and operate for a brief period of time, thereby allowing the illicit operator to drive the vehicle into an attention getting location. The ignition system then becomes irregularly interrupted in such a way that the illusion of misfiring and performance malfunction of the engine is created which serves to discourage the illicit operator from continuing with the attempted theft.

Abstract: Driving aid apparatus for use with a motor vehicle having a manual gearshift transmission and clutch, and providing the driver with guidance for the correct upshift or downshift timing which can contribute to fuel savings and less mechanical abuse of the vehicle's drive train. The exact upshift or downshift indication is computed from engine speed, gear combination, engine loading, and other influential factors including engine temperature, vehicle speed, vehicle loading, and transmission temperature. The driver is provided with a manual adjustment, in the form of a dashboard mounted control, which enables the selection of driving conditions which best suit the driver's individual needs. Through this adjustable control, the driver can establish a shift timing sequence which leads to maximum fuel economy, or alternatively he can optimize the vehicle's performance in the sense of acceleration and speed.

Abstract: A frequency shift responsive metal detector having a sense oscillator coupled with an inducer loop. When the inducer nears a metal object, the effective inductance is changed which correspondingly shifts the natural frequency of the sense oscillator. The sense oscillator couples with a frequency shift detector. The detector produces a d.c. feedback signal which is proportional to the sense oscillator shift and acts therewith to re-establish the oscillator to it's original natural frequency by way of a voltage controlled reactance. The detector also produces a d.c. output that serves to drive an audio frequency rate voltage controlled oscillator wherein the pitch, or resultant frequency therefrom produced is proportional to the effect of the metal object on the inducer loop. A d.c. signal from the detector also serves to drive a visual indicator, such as a meter.

Abstract: An antilatchup pseudorandom binary sequence generator which is interruptable without loss of sequence integrity. Provides sequence detector responsive to correct any undesirable sequence of substantially constant disallowed binary states. Properly irregular sequence may be repeatedly stopped and restarted, with the restarted pattern commencing substantially in the irregular sequence as though no interrupt had taken place. Single stepping, time independent binary sequence generation including the antilatchup improvement is provided.

Abstract: My present invention relates to didactic apparatus as particularly adapted to the tutelage of mathematical fundamentals, multiple choice statements, and the like. A set of inexpensive instructional problem or "flash" cards is prepared for the student for use in conjunction with, and as an essential part of my invention. Each interrogative card in the set contains a problem statement in student readable form, together with a machine readable cryptogrammic answer for the problem. As each problem card is methodically inserted into my didactic machine, the machine elements interpret the answer cryptogram, while the instructional problem remains visable to the student. The student summarily provides a response by inserting his separately selected answer elements from another set of answer cards which, in a way similar to the problem cards, have the plainly visible response elements clearly inscribed on each card, together with a machine readable code or cryptogram for each response element.

Abstract: Apparatus is described for providing controlled corona charging of an electrophotographic member that moves past a corona charging electrode. A corona sensor probe near the charging electrode receives a sample of the corona current flow from the electrode that is proportional to the current flow as it may be modified by extraneous influence, including air pressure, humidity, and corona electrode potential. The probe produces a signal that is adapted to vary the movement rate of the member past the charging electrode, being faster for a sensed increase of corona current and slower for a sensed decrease of corona current. The effective result is an electric charge on the electrophotographic member surface that is uniformly about constant, independent of the variations wrought by most external influences.

Abstract: An electric light controller means particularly adapted for use with an array of lamps to produce a distinctive "fluttering" effect, which is the combined visual sense of movement wrought by a sequential chaser together with the substantially random flickering effect associated with a natural flame. The controller is particularly useful in decorative display arrangements, including advertising displays, theatre marquees, and the like for the purpose of attracting attention and notice.

Abstract: The exact shaft angle position synchronization of two or more ordinary synchronous induction motors is provided. One motor, serving as the master, is powered directly from a source of alternating current. Each additional motor, which may be of a different size or type, is slaved to the intrinsic rotational speed of the master through the inherent electrical speed synchronization wrought by being excited by a common alternating current power source. Each slave motor is further synchronized by this invention to attain, and subsequently hold, an exact angular shaft position relative to the master. The position of the master and each slave motor shaft position is constantly measured, thereby producing several trains of electrical pulses which are compared. When an error exists, an electrical signal is produced which acts with the a.c.

Abstract: A continuous, momently constant amplitude signal is received through a lossy transmission medium and adapted to produce a distinct step-like series of pulse repetition rates therefrom which are proportional to the received signal amplitude. The relatively constant received signal is modulated into a sequence of distinctly separate amplitude steps which are level detected and adapted to produce a cyclic pulse rate proportional to the average value of the received signal. The cyclic pulse rate is employed directly to give aural or visual indication. Alternatively the cyclic pulse rate is adapted to provide a binary format signal for cooperation with a computer data bus or the like.

Abstract: Compensation is provided in the illumination of a mechanically line scanned object plane scene, where the light source is moved across the object plane to provide the light necessary for optical projection of the scene onto an image plane. This compensation gives allowance for the difference in light ray coupling effectiveness of the usual projection optics arrangement for light rays which are on axis with the component lenses, relative to the light rays which are off axis. Predetermined compensation of the illumination which nearly matches the off-axis falloff optical characteristics of the projection optics system may provide a substantially flat, uniform field illumination of the projected scene at the image plane. The instantaneous position related illumination is controlled, from a function usually stored in an electronic memory, by changing the effective electric power applied to the illuminating lamp during any predetermined frame of time.