Abstract: A lens mount in a camera assembly for use with a cathode-ray tube is provided. In particular there is provided a single body section spacer for insertion from one end of the lens assembly to the other end for changing the optical characteristics.

Abstract: A system for inputting data into a display device by touch-sensitive contact areas disposed adjacent the display device and including state of the art electronic recognition circuitry associated with the contact areas for synchronously converting the data to discrete elements of information. Specifically, the transparent contact pads are overlayed over a display with each pad coupled with a multiplexer followed by a synchronous quadrature filter function performed by yet another multiplexer in such a manner that data displayed may be altered.

Abstract: A broadband electron beam deflection apparatus particularly for a tube in which its electron beam can be focused, varied in position and varied in intensity, consisting in the form of a pair of helices each having a flat surface adjacent to the optical axis of the electron beam and also being precisely maintained in a diverging direction to such axis over the length thereof is provided. The apparatus consists of two individual helix assemblies each composed of separate components combined into a single unit in a manner whereby symmetry and desired characteristic impedance is controlled by the dimensions of the helix and having an end-to-end propagation time equal to the electron beam velocity due to the pitch and circumference of the helix.

Abstract: This invention relates to the display, in monochrome, of color television component decoded signals red, green and especially blue, and particularly to a method of displaying transmission and recording system produced defects of color television signals which gives improved visual perception of the defects in the chrominance signal thereof in National Television System Committee and Phase Alternation Line color television systems.

Abstract: A television transmitter video stabilization system having zero carrier reference drive pulse synchronized and referenced to demodulated video having zero carrier reference pulse and vertical interval reference signal for automatically maintaining uniform transmitted signal by maintaining a percentage ratio between the zero carrier reference pulse and the vertical interval reference signal.

Abstract: A circuit for accurately extracting the synchronization information contained within a composite video waveform includes a means for establishing the back porch level of the waveform to a first voltage through a first feedback loop, a means for establishing the sync tip level of the waveform to a second voltage through a second feedback loop, a means for providing the extracted synchronization information at a time determined midway between the first and second voltages, and a system which achieves these ends. An automatic gain control amplifier is included as a portion of the circuit within the system and whose gain is linearly proportional to the logarithm of the AGC voltage and wherein changes in AGC voltage do not interrupt the DC potentials within the amplifier nor do DC changes change the gain of the amplifier.

Abstract: A system for automatic detection of the presence of intrusion by an intruder and/or the phenomenon of combustion manifested in light, flame, and heat, and having delay before activating alarm means for preventing non-genuine detection is provided using digital, solid-state circuitry modules thereby facilitating installation, maintenance, and expansion of the system. An electronic combination lock coupled to the system controls the system to enable the detection of intrusion to be amended by the proprietor of an enclosure protected by the system. Separate alarm means having unique alarm sounds for intrusion and the phenomenon as well as optional telephone dialing of appropriate responding agencies is provided.

Abstract: A phase detector provides a voltage output which depends upon the phase difference between a limited input signal and a reference signal. The phase detector increases the dynamic range of the resultant phase locked loop. An embodiment which illustrates the capability of the design is a SECAM color difference signal demodulator.

Abstract: A sideband detector capable of detecting one of two mixing products and disregarding the other is provided. The characteristic of the invention is provided by feeding a sequential logic mixer in each of two channels by the output of a reference source which feeds one channel in phase and delayed to the second. An input signal is also simultaneously applied to both of the mixers. The mixer outputs then feed a sequential logic circuit for detecting the desired sideband.

Abstract: A special effects generator for use in video switching whereby a three dimensional shadow effect is produced by utilizing luminance information separately derived from RGB color inputs and providing a separate multiplier to control the shadow density. The generator functions by controllably blanking a portion of one video signal and then replacing such portion by another video signal and switching the displayed video linearly, said switching being controlled by color differences in one of the video signals, and providing luminance information derived from one video signal as a control signal for application to the other video signal so as to reduce the level thereof.

Abstract: An apparatus for facilitating the measurement of light parameters such as intensity of light when using a digital photometer or similar device whose readout incorporates a hold or memory function. The apparatus includes a photoelectric sensor receiving light to be measured, in conjunction with an optical view system, in a small acceptance angle and a light source providing an indication, in conjunction with the same optical view system, of the hold mode and means for visually connecting the measurement hold mode and the sensed light parameters together. Means are also provided for initiating the measurement.

Abstract: A precision ramp voltage generator is provided which exhibits exceptionally small start-up aberrations and simultaneously maintains baseline stability. The perturbations in the output are corrected by an increase or decrease in an error current developed via feedback means to charge or discharge a timing capacitor in the direction necessary to maintain the desired baseline, whereas start-up aberrations are minimized by effecting a very fast current switch to a timing element from a current source to a current sink of greater magnitude.

Abstract: A system employing electrical storage tube device and more particularly to scan conversion systems in which stored electrical data is erased and replaced with new electrical data wherein the improvement comprises means for controlling the fading or rate of erasure of the stored electrical data when the storage tube device employs a single electron gun for purposes of reading, erasing, and writing.

Abstract: A high efficiency switching drive for a resonate power transformer having the ability to maintain a constant output voltage over a wide range of source voltage variation while maintaining good power conversion efficiency is provided. A transistorized class-C oscillator has means to saturate the transistors during conduction time to allow the transistor voltage to remain small as opposed to a current source as in the conventional class-C oscillator.

Abstract: A continuously variable resistance attenuator is described in which the signal conductor of a distortionless lossy transmission line is employed as an attenuation resistance uniformly distributed along such line, and the connection of an output contact is moved along such signal conductor to change the attenuator setting. The transmission line has a plurality of separate shunt resistors of equal value extending between the signal conductor and the ground conductor of the line and uniformly distributed along the line to provide a lossy line of uniform characteristic impedance. The input end of such lossy line is connected to a non-lossy line of the same characteristic impedance, and its other end is terminated in a termination resistor equal to such characteristic impedance.

Abstract: A high efficiency switching drive for a resonate power transformer having the ability to maintain a constant output voltage over a wide range of source voltage variation while maintaining good power conversion efficiency is provided. A transistorized class-C oscillator has means to saturate the transistors during conduction time to allow the transistor voltage to remain small as opposed to a current source as in the conventional class-C oscillator.