Abstract: Method and apparatus for reducing phaselock loop FM'ing without disturbing the loop filter. After the loop is locked, the loop filter input signal is changed so that high frequency components therein are increased in intensity and yet the average value of this signal is substantially unchanged.

Abstract: A pseudo-random counter, comprising any conventional shift register having a plurality of flip-flop stages, affords counting capability in two directions, either left or right, by providing logic circuit means for generating from the flip-flop outputs a first repetitive logic bit stream which is shifted to the right in response to one gating signal and a second repetitive logic bit stream which is shifted to the left in response to another gating signal, with the two bit streams being mirror images of each other and applied to the register such that the binary output of the register after advancing the count by any number of clock pulses in the presence of one of the gating signals is the same as the binary output which would have been obtained by regressing the count by the same number of clock pulses in the presence of the other gating signal.

Abstract: An analog signal to duty cycle converter and/or multiplier utilizing an integrator which integrates a composite of an input voltage and a feedback signal to produce a triangular waveform. The triangular waveform, depending upon the polarity of the input signal and the resultant voltage magnitude of the triangular waveform activates one of two sets of voltage sensitive switches for periodically applying feedback voltages to the integrator. If the feedback voltage sources are allowed to vary in amplitude, this variation affects the current or charge passed in the duty cycle obtained and effectively results in multiplication of the input signal times the feedback voltage source amplitude.

Abstract: A plurality of log periodic antennas are arranged in a commutated antenna array to amplitude modulate an RF signal for providing bearing information with respect to the signal direction in an automatic direction finding system.

Abstract: A voltage squaring circuit utilizing an analog signal to pulse rate converter wherein the signals used to control the pulse rate switches are additionally used to control another set of switches fed by the input signal. Thus, the output signal is a pulse rate signal whose amplitude is directly representative of the input signal and these output signals are controlled in pulse rate in accordance with the amplitude of the input signal thereby producing an output representative of the square of the input signal.

Abstract: A torque motor incorporating a permanent magnet rotor and winding therewith for providing the indicating mechanism of a servoed indicating unit. The circuitry for use with the indicating mechanism first applies a reference feedback-producing pulse, then provides the signal for application of torque to the indicator to move it toward the desired position, and then has a quiescent period to clear the stator windings of the mechanism of currents before recommencing the voltage reference and torquing cycle.

Abstract: A flexible self-locking handle for mounting modules or the like to a rack or card cage assembly. The handle end portions including means for lockably engaging said rack and including a deformable detent for restraining movement of said handle to that locked position. By flexing said handle, the end portions are translated inwardly to a second detent position thereby releasing the locking condition relevant to the rack assembly and providing a convenient handle for removal of said module from the rack assembly.

Abstract: A digital oscillator with output frequency accurately changeable from one period to the next. A plurality of retriggerable monostable multivibrators having discretely different design pulse widths are OR'd to an output monostable multivibrator having the narrowest design pulse width. The plurality of monostable multivibrators are triggered in common by the OR'd outputs thereof such that the longest pulse width one thereof defines the period of the output monostable multivibrator. Logic enabling means permit selection of multivibrator outputs to be OR'd.

Abstract: A sensor for remotely monitoring a physical stimulus is rendered completely self-contained by utilizing the equivalent electrical signal transduced from the stimulus to power an A. C. signal source as well as to modulate the A. C. signal generated therefrom before transmitting the modulated A. C. signal to the remote monitoring location.

Abstract: A mounting cover for enclosing electronic components or the like utilizes the side walls as compression members for receiving the compressive forces produced by the screw fasteners used to mount the cover to a surface.

Abstract: A continuously rotatable electrical switch having an odd number of detent positions is used to increase the number of possible electrical circuit combinations with a given maximum number of electrical contact paths. This is accomplished by placing all the brushes on the diameter of a central rotor or rotating wafer having electrical contacts thereon wherein the contacts for both radii of the diameter for a given switch position are interleaved contacts of other switch positions. The design of the switch allows a plurality of output terminals to be continuously electrically connected to the rotor for an increased number of switching functions while maintaining the simplicity of placing all the brushes on one side of a commutating rotor.

Abstract: A solid-state sensor for use in the front end of a DX (Duplex) signaling unit to monitor signals on A and M leads and output signals on an E lead for transmission to a single frequency signaling unit (SFSU) or other E&M signal devices. This circuit replaces a polarized, bridge configured relay normally used for this application in communication circuits.

Abstract: A device for receiving data on a plurality of parallel lines wherein the data on specific ones of said parallel lines occur at different rates. The apparatus utilizes clock information obtained with said data. The apparatus further samples each line at a rate at least as fast as the data on any line can be presented but only places the sampled data in scratch pad memory once for each clock occurrence. Upon completion of assembly of each data word, it is transferred to buffer storage memory. The apparatus as described will eliminate or dump data from prescribed sources by placing all undesired data words in an unaccessed or write only place in buffer storage memory while forwarding the desired data words to their appropriate retrievable places in buffer storage memory.

Abstract: A transition for coupling coplanar transmission means to slotline transmission means wherein the balanced slotline can efficiently be coupled to unbalanced signal supplying means such as coax cable. The transition comprises a terminating means for reacting or interacting with the end of a slotline. This interaction between the end of a coplanar signal transmission means and the slotline means allows transmission of signals in either direction between the slotline and the coplanar sections.

Abstract: Disclosed in an electrical interconnect system for electrically interconnecting printed circuit component boards. Each component board has mounted thereon an elongated dielectric housing which contains within housing cavities two rows of electrical sockets, the sockets of one row having integral tabs extending over the sockets of the inner row to make electrical connection with circuitry on the board. A resilient seal is provided between the tabs and the inner row sockets to assure moisture isolation and electrical isolation therebetween.

Abstract: Phaselock circuitry including means for providing a frequency variable feedback signal and a phase detector receiving the input signal and the feedback signal. The phase detector provides pulses whose width and average value are dependent on the phase relationship between the input and feedback signals.

Abstract: Digital indicating means for displaying two series of numbers, one of which commences repeating. The repeating series of numbers is limited in rotation in the embodiment shown between 360.degree. and 720.degree. by a bi-positional pawl cam-follower which interacts with two stops on a cam. The pawl displays one series of digits while the cam displays a second series of digits.

Abstract: A wide range digital phase detector employs a pulse count generator which provides mutually exclusive counting pulses corresponding to the pulses in the two pulse trains to be compared, thereby ensuring that all pulses including those which are coincident are properly registered and accounted for.

Abstract: The modulation factor for an AM signal wherein the modulation signal is an A. C. wave is determined by demodulating the AM signal, obtaining the average D. C. level and peak deviation therefrom for the demodulated signal and then dividing the latter by the former.

Abstract: An electronic device is protected from excessive A. C. voltages by a diode in series with the A. C. signal path which is forward biased from a shunt D. C. power supply for passing desired A. C. signals without distortion and which is reverse biased by a series capacitor which is charged through a shunt threshold device whenever the A. C. voltage exceeds a predetermined level and is discharged through a shunt path thereafter.