Abstract: A method for detecting the coincidence between the phase position of a code of an SSMA signal which has been received with a heterodyne receiver and the code which is produced in the receiver through means for evaluating the signal power increase in an intermediate frequency position when the correct phase position occurs.

Abstract: Improved method adapted for the continuous precipitation of metal cement (especially copper cement) from an aqueous solution of a first metal (such as copper) mixed with pieces of second metal (such as iron) which is less noble than such first metal. The first metal cement depositing on the second metal pieces is loosened therefrom by means of constant but regulated movement of such pieces, and is separated and collected from the mixture.

Abstract: A safety plug socket has two independently actuated circuit breakers. The two circuit breakers are in the form of a common C-shaped leaf spring and two conducting actuating pins which are movable to close the circuit breakers when a plug on a line cord from a consumer appliance is inserted into the socket of the circuit outlet to move the actuating pins of the two circuit breakers into contact with the conductive leaf spring. In one form of the invention, the biasing springs of the circuit breakers are current carrying and form a part of the supply circuit. In another form of the invention, each circuit element comprises leaf spring contact arms which are bridged by a conductive bridging member carried by respectively actuating pins of the circuit breakers. Power can only be obtained from the outlet socket when both circuit breakers are closed and when the plug from the consumer appliance has been moved into the outlet socket, which action closes off access to the tubular contacts to the circuit breakers.

Abstract: An attachment for laboratory fume hood structures and the like for opening and closing the movable sash member thereof to vary or close the effective size of such access opening, and in particular to move the sash into closed position when the hood is unattended and to open the hood in the presence of operating personnel. The construction is such that the device may be readily attached to most existing fume hood structures and the like with substantially no modification or change in the latter and providing automatic operation when desired as well as manually controlled operation. At the same time the construction is such that the sash member may be manually actuated if necessary. A further improvement provides for the control of the hood exhaust blower, for example to provide high speed operation when the sash is in open position and low speed operation when the sash is in a lowered or closed operation and, if desired, simultaneously therewith the control of an auxiliary air blower.

Abstract: A receiving system for digital communication signals modulated on a carrier in the form of binary frequency modulation in a propagation medium which is affected by reflections in which the information losses occurring as a result of phase and amplitude distortions are automatically determined by two mutually supplemental arrangements. One of these arrangements includes in a first branch a frequency discriminator after which is connected a device for recognizing interference peaks caused by reflection distortions and further including a circuit which compensates for these interference peaks. The other arrangement contains an amplitude demodulator which is connected in parallel to the frequency demodulator in a second branch.

Abstract: An arrangement for the recording of rastered half tone pictures, in which each covering dot is formed in a raster field, with the size of the dot being dependent upon the light directed on different portions of the raster field, by a plurality of individual light beams coordinated in a line and focused on the recording medium by objective lens means, in which an optical element is disposed in the beam path to such objective lens means to refract light in the direction of said line, with such optical element occupying approximately half of the total projection cross section of all of the component light beams, and with the boundary of the projection cross section extending transversely to said line direction of the light beams.

Abstract: A circuit arrangement offsets the data heads of a data cylinder memory by a determinate amount from the mid-position of the data cylinder and uses a fine regulating circuit and a coarse regulating circuit. The circuit arrangement includes a track difference register, a digital/analog converter connected to the track difference register, and arrangement for forming the sign and a function generator, in which the amount of the desired track offset is input, in digital form, into the track difference register, and which is converted into an analog value by the subsequently connected digital/analog converter. The sign of the offset is produced in the coarse regulating circuit which has an arrangement provided for normal positioning. An analog switch is connected between the input and output of the function generator and linearizes the function generator when the same is closed when the regulating circuit is transferred to fine regulation.

Abstract: A water purification system having a pre-filter, a series of germicidal radiation chamber filter units alternating with a series of mechanical filter units and having a flow measuring device affixed to the output part of a final mechanical filtering unit. The rate of flow through the series of alternating germicidal and mechanical filtering units being measured by the flow measuring device and in turn controlled by an electrically operated valve so as to keep the rate of flow, of water being purified, through the series of alternating germicidal and mechanical filters at some predetermined and optimal setting with respect to the efficaciousness of the germicidal filters.

Abstract: A circuit arrangement provides a slow, constant forward or reverse movement of the write/read heads in a cylinder memory and includes a regulating circuit which comprises a track difference register, a digital/analog converter connected to the track difference register, an arrangement for providing a sign for the analog signal, and a function generator for receiving the analog signal. In the digital portion of the regulating circuit one or more of the low-value bits is activated in order to produce a slow, constant speed of the write/read heads.

Abstract: A liquid crystal display device having two carrier plates each having a first surface supporting electrically conducting electrode layers, the plates being hermetically sealed together with the first surfaces in facing relationship to form a chamber receiving a liquid crystal layer characterized by a covering layer disposed on each of the first surfaces. In the preferred embodiment, each of the first surfaces is provided with an obliquely vapor deposited aligning layer inbetween the conducting layer and the covering layer which covering layer has a thickness no greater than 0.05 microns and preferably less than 0.02 microns. The covering layer may be a silane derivative bonded by chemosorption on the aligning layer, a nitride such as silicon nitride, or an oxide.

Abstract: An erasible programmable read-only memory employing an n-chanel memory FET. A MOSFET is used having a floating memory gate which includes erasing projections ("tongues") on the floating memory gate. One tongue covers the drain and the other tongue covers the source. Erasing occurs bit-wise via the drain-side tongue; erasing word-wise or matrix-wise via the source-side tongue. Bit-wise, word-wise and matrix-wise erasing is obtained as desired. It is applicable for REPROM chips, and in particular, for programmable memories of miniature calculators.

Abstract: A method of depositing a plurality of epitaxial monocrystalline layers of semiconductive materials onto an individual substrate of a plurality of substrates via the sliding liquid phase epitaxy technique whereby the spacing between respective melt-containing chambers and respective substrate-receiving recesses are substantially equal to one another and, during the deposition stage, the temperature of all melts located on respective substrates is lowered a substantially identical amount so that a corresponding epitaxial layer grows on each such substrate.

Abstract: A tunable microwave oscillator including a transistor with a tuning diode which form an oscillating circuit particularly for use in television tuners and which does not require an inductor. A novel combination of an oscillator and mixer is also provided and the oscillator and mixer are designed to cover broad tuning ranges.

Abstract: A toner feeding assembly for feeding a developer mixture of a toner and carrier particles to an intermediate carrier which has been electrostatically charged, the feeder mechanism employing magnetic brushes of the rotating cylinder type, at least one of the brushes being adjacent the intermediate carrier. An excess toner deflecting guide member is positioned adjacent the magnetic brush-intermediate carrier nip having one long side edge projecting towards the nip and an opposite long side edge positioned away from the nip and below the one edge. The guide is effective to direct a film of developer mixture away from the nip area and back to a developer mixture reservoir.

Abstract: An adjustable gear train is disclosed wherein play in a train of intermeshing bevel gears is accommodated by forming one of the gears of two radially separated coaxial parts which are axially movable with respect to one another, one of the parts being gear toothed and the other of the parts forming a shaft for the toothed part.

Abstract: A machine tool data system for receiving and storing abbreviated instructions representing blocks of machine tool control data and including pattern type instructions such as copy, mirror image and tool change each involving a series of such blocks, the computer responding to editing instructions such as insert or delete as to specified lines of stored instructions or computing the blocks represented by the stored instructions for transmission to an output device such as a tape punch, the computer generating the blocks of a pattern type series at the rate of utilization of said blocks by the output device. A machine tool may be connected on line and controlled by the computer simultaneously with the editing or tape preparation operations thereof, and the machine tool may be controlled manually from a data terminal on line with the computer when the terminal is not in use for tape preparation.

Abstract: A step-on actuated foot switch is disclosed preferably for use in connection with X-ray examination devices to automatically turn off motor servo drives when an operator's feet are positioned adjacent moving portions of the X-ray examination device. The switch device includes a support plate having a step-on plate suspended above the floor plate and parallel thereto with interposed switching elements which are actuated by relative movement of the two plates. The switch elements are bent spring contact devices which have fulcrum points positioned thereunder about which portions of the spring bend during relative movement of the two plates to break a contact.

Abstract: An endocardial electrode for intracardial stimulation of a heart is comprised of an elongated electrical conductor encased within an electrical insulator with a two-component head member positioned on the insulator at the distal end of the electrode for contact with heart tissue when the electrode is operationally positioned relative to the heart. One of the head member components is in electrical contact with the elongated conductor while the other component is spaced therefrom. The component in contact with the conductor is composed of a heart-tissue compatible conductive material which exhibits a minimum heart stimulation threshold, such as carbon or the like, and the component spaced from the conductor is composed of a heart-tissue compatible material which exhibits a receptiveness for growth of heart tissue thereabout, such as platinum or the like.

Abstract: A blocking converter is provided having a switching transistor controlled via a triggered monoflop with a defined on-time RC circuit which insures that the same electric energy quantity is always stored in a transformer driven by the switching transistor. The electrical energy is reversed to charge the charge capacitor during a blocking phase of the switching transistor. As soon as the reverse charge process is completed, the monoflop is retriggered. The blocking converter is preferably used in battery-operated electronic flash equipment for photography.

Abstract: A method and apparatus for calibrating a gamma ray inspection system for measuring the wall thickness of a tubular product such as a pipe or the like, the system including a gamma ray beam generating station, means for conveying a tubular product axially past the gamma ray beam, the gamma ray generator being rotated during the axial movement of the tubular product, means for detecting the amount of attenuation of the gamma rays passing through the tubular product, and a calibration block having a first portion with a thickness corresponding to twice the nominal wall thickness of the tubular product to be inspected, and a second portion having a thickness corresponding to a predetermined amount less than the nominal wall thickness. Means are provided for selectively introducing the first portion and the second portion of the calibration block into the gamma ray beam to enable the operator to calibrate the equipment and to be able to detect tubular products which are defective in terms of thickness.