Abstract: A digital meter incorporates a circuit which senses the input voltage and automatically energizes a digital readout device only if the input voltage is greater than a predetermined absolute value.

Abstract: A programmable frequency detector is provided for determining if the frequency of an input signal is above, below, or within a programmable tolerance of a programmable frequency. A counter circuit is provided that is enabled by a timing stage during a predetermined calculation period to count the input frequency; the counter output is then compared to a programmed frequency code input by a comparator stage. A latch circuit and the timing circuits then utilize the comparator output to determine if the input frequency was high, low, or within the pass tolerance band.

Abstract: There is disclosed a multiple gaseous discharge display/memory panel having an electrical memory and capable of producing a visual display, the panel being characterized by an ionizable gaseous medium in a gas chamber formed by a pair of opposed dielectric material charge storage members which are respectively backed by a series of parallel-like conductor (electrode) members, the conductor members behind each dielectric material member being transversely oriented with respect to the conductor members behind the opposing dielectric material member so as to define a plurality of discrete discharge volumes constituting a discharge unit, the dielectric having at least one electron emissive substance applied to the surface thereof in an amount sufficient to decrease the operating voltages of the panel. Typical electron emissive substances contemplated include Group IA elements, Group IA oxides, barium, GaAs, GaP, InAs, InSb, InP, NiO, CsF, CsI, AgOCs, and AuOCs.

Abstract: An ampoule shaped electrodeless discharge tube, including a large-diameter portion and a small-diameter portion, is filled with luminous elements and inactive gas. The discharge tube is placed in a housing having a lighting window from which the light emitted by the elements is extracted. A high-frequency coil is wound around the large diameter portion at the middle portion of the discharge tube. A partition wall provided in the housing partitions the housing into a first and a second compartments. The middle portion of the discharge tube and the small diameter portion are placed in the first compartment, while the end portion of the discharge tube opposite to the small-diameter portion is placed in the second compartment, and is cooled with air-flow flowing from the inlet to the outlet, both of which are formed to the housing. When high-frequency power is supplied to the coil, the luminous elements in the discharge tube is excited to luminesce.

Abstract: One or more lasers direct one or more beams of radiant energy upon a nonlinear crystal having a sequence of rotational twin planes parallel to each other and perpendicular to the incident beams to produce an output beam at predetermined frequency at relatively high power level that may be detected or used in a suitable utilization device. Preferably the twin planes in the crystal are separated from each other by uniform spacing related to the coherence length for the nonlinear process being employed so that the power enhancement is proportional to the number of twin planes squared.

Abstract: A device for measuring the stopping time of working machines is provided with first and second switches for synchronically breaking the current to the working machine and starting a time meter, and a third switch for stopping the time meter when the working movement of the working machine has ceased. For the actuation of the first and second switches, the measuring device is provided with a first abutment entrained by the working machine and, in its turn, entraining a second abutment which is provided with its own power source for releasing the second abutment from the first abutment, thereby to actuate the third switch when the working movement of the working machine has ceased.There is a regulation, with particular regard to presses such as edging presses, eccentric presses and similar working machines, that the press should be provided with information concerning the braking time corresponding to the maximum stopping distance of the press.

Abstract: An automatic level controller comprising a switching transistor connected to the output stage of an audio amplifying circuit to be turned off when the output signal of the audio amplifying circuit attains a predetermined level, a control transistor connected to the input stage of the audio amplifying circuit for bypassing to the ground a portion of the audio signal applied to the audio amplifying circuit thereby controlling the audio level, a diode adapted to be turned on in response to the turn-off of the switching transistor for supplying current from a power source to the audio level control transistor as an audio level control signal, and a time constant circut for setting the attack period and release period of control by the audio level control signal.

Abstract: A system for detecting the occurrence of a fault in a solenoid utilization system when the fault is manifested by the solenoid armature or plunger being seated either too early or too late. A predetermined time interval is established such that the seating of the solenoid armature or plunger during this time interval is regarded as acceptable. A cusp detector circuit detects the point in time at which the solenoid plunger or armature seats and if it is within this predetermined time interval, it is recognized as acceptable, but if it is detected either too early or too late, an indication is generated that a fault exists and the occurrence and probable nature of the fault may be flagged. A test mode is provided whereby the predetermined established time interval can be considerably narrowed so that maintenance can be performed on the system so as to insure that the solenoid armature or plunger seats at exactly the proper time.

Abstract: A control circuit for triggering a stroboscope repetitively at successively longer intervals following successive input signals. It enables visual observation of a selected portion of the travel of a repetitively moving object with a cinematic slow motion effect. The circuit is relatively simple and includes a variable delay device, and means for varying the delay produced by it in accordance with a ramp voltage that has a period spanning several of the input signals, that is, several repetitions of the complete motion of the object to be observed.

Abstract: A mathematical expression is converted and approximations applied to remove complex processes, simplifying the circuitry of system which controls compressor speed in dependence on ambient temperature.

Abstract: A line voltage monitor for monitoring the voltage applied to electrical equipment and for providing an indication or protective disablement of the equipment in the event excessive variations occur in the line voltage. The line voltage monitor includes a steady state voltage sensing means and a transient voltage sensing means for detecting both types of voltage variations.

Abstract: A carbon arc lamp for use in a light fastness tester. The lamp has an arc glow section, a base located at the top of the arc glow section, a heat radiating means integral with the upper side of the base, a heat collecting means integral with the side of the base facing toward the glow section, and a glass bulb extending from the base around the glow section. The heat produced due to carbon arc discharge in the glow section is collected by the collecting means and radiated to the outside of the lamp by the radiating means aided by the convection of the outside atmosphere to hold the base at a temperature lower than that of the glass bulb so as to eliminate or reduce deposition of ash resulting from the combustion of carbon on the light transmitting glass bulb which is at a higher temperature than the base by virtue of the tendency of the ash to be deposited to different extents, depending upon temperature, to thereby ensure emission of light through the bulb at a substantially constant luminous intensity.

Abstract: A rotary-anode X-ray tube comprising means to adjust current density measured along a dimension x of the focal spot of the electron beam on the anode such as to decrease in the direction of rotation of the anode according to 1/.sqroot.x.

Abstract: An improved luminous radiation panel apparatus of the type in which no separator is used between two substrates and which is thus simple to manufacture, free from erroneous discharge, longer in life and capable of producing a stable discharge. Furthermore, the apparatus has high resolution and brightness and there is no possibility that the excitation of a selected phosphor simultaneously excites the adjacent phosphors. The apparatus is adapted to make a display in color and is suited as a display device, particularly as a television apparatus or character display device.

Abstract: A frequency detection device adapted to detect in which of a plurality of frequency bands an input signal occurs comprises band pass filter means for selecting from the input signal the output signals in each of the bands and detecting means responsive to said output signals to stop the scanning action of the scanning means wherein the band pass filter means comprises a band pass filter and means for scanning the filter through different bands in turn, and an indicator actuated by the stopping of the scanning action to indicate the frequency band in which the input signal has occurred.

Abstract: A "Gerdien Condenser" spectrometer for use in a moving air environment for measuring ion densities wherein a constant, electric field is provided in the direction opposite to prior art devices so that the outer cylindrical electrode of the condenser functions as the ion collector. This functional change for the outer electrode permits the use of a small-radius annular opening with a larger width as the entrance for the ions to be measured. This change in the shape of the entrance to the condenser chamber substantially reduces the gas turbulence within the chamber thus increasing the ion density measurement accuracy. The outer electrode may be segmented to further increase the ion measurment accuracy.

Abstract: A detector for locating the direction of propagation of transients on eleical power lines supplying critical loads having various types of random impulse voltage transients. The device detects the polarity of transient voltages and the direction of transient current. An integrated logic and control circuit compares the sampled voltage and current to indicate from which direction the transient came. The logic and control circuit activates indicator lights which show whether the transient occurred in the direction of the source or the load and whether the transient was positive or negative.

Abstract: A transient direction detector which indicates the occurrence of power line ransients and their direction of propagation. The system is comprised of current and voltage sensors, a logic and control circuit which receives the transient current and voltage sensed and provides an output to an indicator circuit to show the direction of any transients on a power line. The current sensing circuit receives an input from an induction coil on an iron clamp around a power line. The voltage sensing circuit receives its input from a voltage sampling transformer directly connected across a power line. The logic and control circuit determines where the transient occurred by comparing the polarity received from the transient current and voltage sensing circuits.

Abstract: Chromium plated corrosion oxidation resistant spark plug electrode.

Abstract: A circuit for generating a potential indicative of torque. The circuit responds to the phase angle between the AC signals generated by two generating coils or magnetoelectric pickups, each excited by a toothed wheel. The two toothed wheels are connected to different points along a shaft transmitting power between an engine and its load. The windup or torsion of the shaft is proportional to torque; therefore, the relative phase angle of the signals from the two pickups is also proportional to torque. Each generating coil is connected to a high-gain input amplifier which generates a square-wave signal in phase with the signal from the coil. Each input amplifier triggers a pulse generator which generates a pulse the leading edge of which is in fixed phase relation to the pickup signal. The two pulse generator outputs are connected to a flip-flop circuit to generate a zero output signal during the interval between the two inputs to the flip-flop. The duty cycle of this signal is indicative of torque.