Abstract:
In a picture telephone system means are included at both ends of a telephone connection between two subscribers for adjusting the frame rate of pictures so that with a limited channel band width good resolution is obtained both for stationary detailed pictures such as documents and for moving pictures requiring less resolution such as conversing subscribers.
Abstract:
In an arrangement for assembling printed circuit cards with electronic components in mutually parallel positions each card is provided with two elements fixed along an edge of the cards. One of the elements is clamp formed and the other one consists of a spring clip, the central part of the clamp formed element is arranged to engage the spring clip element, whereby each card in a stack of cards can be displaced relatively to the other cards in the stack.
Abstract:
A phase locking arrangement in which a free-running oscillator running with a frequency fo is injection phase locked by a synchronizing oscillator with a free-running frequency fs and a multiplier giving a multiplied frequency n . fs. A modulating frequency fm modulates both the free-running oscillator and the synchronizing oscillator through two direct coupled FMmodulators, so that the free-running oscillator will be continuously tuned to a frequency f1 which is chosen so that the synchronizing band Delta f f1 - fo of the free-running oscillator is narrow, so that the synchronizing power from the synchronizing oscillator can be kept low.
Abstract translation:一种锁相装置,其中以频率fo运行的自由振荡的振荡器通过具有自由运行频率fs的同步振荡器和产生倍频n的乘法器被注入锁相。 fs。 调制频率fm通过两个直接耦合的FM调制器对自由振荡器和同步振荡器进行调制,使得自由振荡器将被连续调谐到频率f1,频率f1被选择为使得同步带DELTA f = f1 自由振荡器的fo较窄,使得来自同步振荡器的同步功率可以保持较低。
Abstract:
Apparatus for metallizing parts of a body by dipping into molten metal includes a plurality of part vessels or dip tanks with different heights and widths so chosen in accordance with the parts of the body to be metallized.
Abstract:
A process control computer scans test points arranged in groups to perform operations in accordance with changes in the states of the test points. The data store of the computer stores the states of the test points as words wherein each work represents a group of test points and the bits of the words represent the test points of the group. A flag resister of the data store comprises a group of bit cells with each bit cell being associated with one of the words. During the scan if the change of state of a test point changes, the associated bit in the data store is changed and the flange bit of the associated word is marked. Thereafter, the computer need only scan those words whose flag bits have been marked.
Abstract:
A radar unit arrangement for determining the position of the pulse center and the pulse duration of the received echo pulses. The echo pulses gate a number of subpulses to a first binary updown counter which counts the subpulses. A second binary up-down counter receives a pulse from the first each time a certain value is exceeded. A third binary counter indicates the time elapsed from the moment of the emitting a radar pulse. The contents of the second and the third binary counter are continuously compared in a comparator which each time equality is obtained activates a bistable circuit. The first and the second binary counters are controlled by the bistable circuit so as to switch the counting direction of the counter in such a way that the number of subpulses before and after the change of state of the bistable circuit will be the same.
Abstract:
Phase detection circuit, which in the state of a voltage value indicates the difference between the phase of an incoming signal and the phase of a reference signal. The circuit is built up by an operational amplifier with two inputs, one of them inverting the phase of the incoming signal. The incoming signal is fed to both inputs of the amplifier, whereby the signal is fed to the not inverting input via a switch which is controlled by the reference signal in such a manner that it alternatively lets through and blocks up the incoming signal during every other half period of the reference signal. The amplifier is so dimensioned that the amplification of signals fed to the inverting input is as high or lower than the amplification of signals fed to the other input.
Abstract:
Combined loud- and low-speaking telephone instrument in one unit comprising no more than two electro-acoustic converters, one of which is used as a microphone when the telephone instrument is in its loud-speaking function position and as a telephone receiver when the instrument is in its low-speaking function position, while the other electro-acoustic converter is used as a loudspeaker when the telephone instrument is in its loud-speaking function position and as a microphone when the instrument is in its low-speaking function position. When resting on a table or a similar support a switch button which protrudes through the bottom of the telephone instrument is pressed in so as to keep this in its loud-speaking function position, and when the instrument is lifted from its support the switch button is pressed out switching the instrument to its low-speaking function position.
Abstract:
Apparatus for identifying those means of a plurality of means which have changed their binary state. A reference is sequentially obtained to only those means which have changed their state without spending unnecessary work sifting off the remaining means. The arrangement is particularly applicable in telecommunication systems, more especially such systems which have a central control, e.g., program store controlled systems in which the arrangement makes it possible to reduce considerably the idle load of a controlling computer.
Abstract:
Rack for holding a plurality of counters in rows and columns. The rack comprises a number of casings, each with a rectangular bottom part divided into compartments the construction of which is made in such a way that it facilitates an easy pushing-in of a counter into a compartment. A single lid provided with windowopenings for reading of the counters protects all the counters in one casing. The casings are provided with hinges so that they can be swung out for connection or inspection.