Abstract: The picture hanger is adjustable in three dimensions to thereby adjust the suspension position up and down, side to side and inwardly and outwardly with respect to a mounting point. The hanger includes a body plate having an elongated slotted opening to receive a mounting screw at a mounting point upon a wall. A stud protrudes from the front surface of the body plate to provide the suspension support. The body plate is rotatable about the mounting point and translatable through movement over a screw at the mounting point at the slotted opening to thereby adjust the position of the stud at different suspension support positions.

Abstract: A method and apparatus for utilizing the cool outdoor air or other cooling sources for cooling a volume are disclosed. The system comprises at least two coils suitable fluid pipe line, fluid and a circulator pump. In the preferred embodiment, indoor and outdoor coils and the circulator are connected by circulation piping containing a heat transfer fluid, the fluid being isolated from ambient air. In winter the circulator pump is activated and warm fluid flows through the outdoor coil, causing the fluid in the coil to release heat, the coil fluid flows through the indoor coil, causing the fluid in the indoor coil to absorb heat. Such a system can be used to cool a volume when the ambient, outdoor air is cooler than the air within the volume.

Abstract: A passive transponder for use in an interrogation/transponder system comprises a substrate having a substrate surface defining a path of travel for surface acoustic waves; at least one transducer element arranged on the surface for converting between electrical energy and surface acoustic wave energy which propagates along the path of travel; and a circuit, connected to the transducer element(s), for supplying interrogating signals to the transducer element(s) and for receiving reply signals therefrom. In order to minimize insertion losses in the substrate, acoustic wave reflectors are provided to reflect the surface acoustic waves back towards the transducer element(s).

Abstract: A passive transponder for use in an interrogation/transponder system comprises a substrate having a substrate surface defining a path of travel for surface acoustic waves; a launch transducer element arranged on the surface for converting interrogating signals into surface acoustic waves which propagate along the path of travel; a plurality of tap transducer elements arranged on the surface at spaced intervals along the path of travel for converting surface acoustic waves into respective output signals; and a circuit, connected to the tap transducer elements, for combining the output signals of these transducer elements to form reply signals. In order to control the delay time from transducer element to transducer element, one or more "delay pads" are provided on the substrate surface between these transducer elements.

Abstract: A "passive interrogator label system" (PILS) comprises an interrogator for transmitting an interrogation signal, one or more "labels" or passive transponders which produce a reply signal containing coded information in response to the interrogation signal, and a receiver and decoder for receiving the reply signal and decoding the information contained in it. The frequency of the interrogation signal assumes a plurality of frequency values within a prescribed frequency range. The decoder includes a mixer (four quadrant multiplier) for mixing together the interrogation and reply signals (or signals derived therefrom) to produce a mixed signal containing frequencies which are the sum and difference of the frequencies of the interrogation and reply signals. A signal processor, responsive to this mixed signal, detects the amplitude and phase of at least some of the frequencies contained in the mixed signal and thereby determines the informational code associated with the transponder.

Abstract: A passive transponder for use in an interrogation/transponder system comprises a substrate having a substrate surface defining a path of travel for surface acoustic waves; a launch transducer element arranged on the surface for converting interrogating signals into surface acoustic waves which propagate along the path of travel; a plurality of tap transducer elements arranged on the surface at spaced intervals along the path of travel for converting surface acoustic waves into respective output signals; and a circuit, connected to the tap transducer elements, for combining the output signals of these transducer elements to form reply signals. In order to maximize energy conversion from the interrogation signals to the reply signals, the launch transducer is made larger than the tap transducers.

Abstract: A passive transponder for use in an interrogation/transponder system comprises a substrate having a substrate surface defining a path of travel for surface acoustic waves; a launch transducer element arranged on the surface for converting interrogating signals into surface acoustic waves which propagate along the path of travel; a plurality of tap transducer elements arranged on the surface at spaced intervals along the path of travel for converting surface acoustic waves into respective output signals; and a circuit, connected to the tap transducer elements, for combining the output signals of these transducer elements to form reply signals. In order to minimize reflections from the edges of the transducer elements, these elements are configured with serrated edges facing the path of travel.

Abstract: Circuit arrangement for fault locating in conjunction with equipment for the trunk feeding of electrical loads by means of dc series feeding in which the trunk supply circuit is equipped with cross branches conducting only for currents in the direction of a test current. In such a circuit arrangement it is possible to indicate the results of the fault locating in a simple manner. Towards this end, one window discriminator for each load is provided in the supply point. This circuit arrangement can be used advantageously in communications equipment having trunk fed waystations.

Abstract: The invention relates to a paper transportation device for printers, which use reel paper, having a motor-driven platen and one paper pressure roller which contacts the platen approximately at the center thereof so that it can be swung away in an elastic manner. The paper pressure roller is motor-driven such that the peripheral speed of the paper pressure roller leads the peripheral speed of the platen and by virtue of the arrangement of the paper pressure roller, the maximum possible angle of loop (.beta.) of the paper and the platen is achieved. This angle is delimited by the paper pressure roller and by a paper guidance channel which is aligned to lead tangentially away from the platen. The paper guidance channel is preceded by a device which produces a bias between the paper and the platen.

Abstract: A method of creating text using a computer having a display screen and a pointing mechanism for identifying locations on the display screen. The method involves displaying a list of commonly used words on the screen so that the user may select the words to be used in the text by successively pointing to them. The computer responds to the pointing mechanism and displays on the screen a line of text comprising the identified words in their successive order of selection.

Abstract: AgCdO based contact elements are replaced in contactors and small circuit breakers with CdO-less type elements which exhibit little burn-off in the arc, a low welding force and minimal heating when carrying continuous current. However, known AgSnO.sub.2 contact materials do not have optimum values in all operationally important properties. In these contact materials a more firmly adhering oxide layer occurs as compared with AgCdO. The invention relates to a sintered compound material for electrical contacts, consisting of AgSnO.sub.2 Bi.sub.2 O.sub.3 CuO and containing at least one other metal oxide additive which sublimes below the melting temperature of silver. The SnO.sub.2, Bi.sub.2 O.sub.3 and CuO are globularly precipitated in silver material structure zones having a maximum diameter of 200 .mu.m, and the metal oxide additive is distributed on the surfaces of the boundary regions of these microscopic silver zones.

Abstract: The device using high-gradient magnetic separation techniques to extract magnetizable particles from a flowing medium contains a filter structure which has several wire nets made of non-corroding, ferromagnetic material with a predetermined mesh width and wire gauge. These nets are arranged, one behind the other, perpendicular to the direction of flow of the medium. The wire nets are subjected to a magnetic field that is either parallel or antiparallel to the direction of flow of the medium. In order to increase the rate of separation, particularly for particles of varying size and magnetizability, and the maintenance interval for this separation device, the filter structure is divided into at least two parts (10, 11) arranged one after the other along the direction of flow of the medium (M), with the magnetic flux density (B.sub.1) present in the region of the first part (10) of the filter structure that is smaller than the magnetic flux denisty (B.sub.

Abstract: A writing pen, particularly a retractable ball point pen, is formed with two random number selectors to provide a multiple game play. The game and pen construction is integrally cooperatively formed for ready manufacture and use.

Abstract: A difference pulse code modulation ("DPCM") encoder for encoding and compressing digital data. This encoder includes a quantizer formed by a read-only memory (ROM). DPCM signal values to be quantized are supplied without a sign bit as addresses to the ROM; the code words read-out as data from the ROM in response to addresses represent the quantized DPCM signal values. The size of the ROM required for this purpose is reduced by limiting the DPCM signal values which are supplied as addresses to the ROM. The sign bit contained in the DPCM signal values is not supplied to the ROM but is added to the code words read-out of the ROM as quantized DPCM signal values. In addition, the DPCM signal values and also the code words read out of the ROM are rounded off by omission of the least significant bit.

Abstract: A method of producing copper-chromium fusion alloys having a chromium content of at least 25% by mass and at most 60% by mass with a homogeneous macrostructure without lattice defects and without shrink holes or pipes, which can be used as contact material for vacuum power switches with breaking currents exceeding 10kA. According to the invention, during fusing of the starting material to the fusion alloy a superheating to at least 2000.degree. C. is obtained at least in a partial zone of the instantaneous melt volume. Thereafter the melt is cooled at a cooling rate such that no primary Cr precipitation or segregation occurs.

Abstract: The paper transport shaft of a paper feed mechanism is movably mounted on an arm of a frame-supported spring wire lever. Another arm of the spring wire lever is pivotably mounted and may be set to flex the body of the spring wire lever through a pivot lever. Depending on the pivoting of the pivot lever the contact pressure between a paper pressure roller mounted on the paper transport shaft and a platen is varied. Selectively, the paper transport shaft can be pivoted away from the platen to allow adjustment of the paper inserted in the paper feed mechanism.

Abstract: To make it possible to suppress spurious signals of any type without having a negative effect on the stimulation or detection characteristics of a cardiac pacemaker, a signal processing unit is provided which prevents control signals from being applied to the device for controlling the heart stimulation pulses when signals from the two unipolar pacemaker electrodes are received at substantially the same time.

Abstract: A method is disclosed for testing a complex digital circuit that is designed as a serial access scan path. The circuit incorporates a number of flip-flops, at least some of which are selectively connectable into a scan path shift register. The circuit also has a number of primary inputs, primary outputs, a scan path input and a scan path output. In the testing method, a first digital test pattern is applied to the primary inputs and a second digital test pattern is shifted into the scan path shift register. The digits appearing at the primary outputs are repeatedly compared with those of a first digital number indicative of the proper operation of the circuit as each digit of the second digital test pattern is shifted into the scan path shift register. If the digits appearing at the primary outputs are not equal to those of the digital numbers to which they are compared, a signal indicative of faulty circuit operation is produced.

Abstract: An insulator arrangement which may be employed, for example, on a capacitive protective fence comprises three principal elements:(1) an insulator, made of ceramic or plastic, having at least one ring-shaped recess arranged on its bottom to form a long path for leakage current;(2) a mounting bracket extending axially downward from the bottom of the insulator which has fastening means on its free end for securing an electric wire; and(3) a metal cup mounted over the insulator to protect it from the environment. A mounting element consisting of two arms forming a U-shaped configuration is arranged on the metal cup to facilitate mounting on a fence post.

Abstract: The invention relates to a dentist chair with a chair top carrying at least a chair seat. A chair bottom contains a height-adjusting system for the chair top, and at least one apparatus adaptable at the chair bottom which requires various supplies, such as air, water, electric current, which by means of supply lines are brought into the apparatus through the chair bottom from a connection box at the floor. For hookup of the apparatus the chair bottom contains a hookup portion which contains coupling means both for mechanical coupling and for coupling of the various other supply lines. The apparatus is connectible to the supply lines through a counter-piece which matches the hookup portion of the chair bottom and which, for mechanical coupling of the apparatus contains counter-coupling means which can be brought into engagement with the coupling means and which then establishes the proper required connection.