Abstract: An automatic lap counting device for use by swimmers and runners, for example, which depends upon the change in the magnetic line of force of the North/South magnetic field for determining the laps.

Abstract: In the disclosed device, a counter digitally counts the used or unused length of a tape, a display using a liquid crystal or the like displays the count, and a switch optionally shifts the count up or down.

Abstract: Microwave radiation source operating in two different frequency bands comprising two open cavities energized by two orthogonal dipoles, situated one within the other, the two cavities being wholly reflective for the waves transmitted by their corresponding energizing dipoles, and the interior cavity being transparent for the wave transmitted by the dipole energizing the exterior cavity.

Abstract: A counter for the non-volatile storage of an n-bit word includes a storage matrix having 2.sup.m non-volatile electrically programmable storage elements which may be bitwise selected by means of a word shift register and a bit shift register, a binary counter having m+n bistable flip-flops, with each one of the n Most Significant Bit flip-flops being coupled to a storage cell of a non-volatile storage device, and a clock sequence control for providing reset, erase and write pulses.

Abstract: A circuit for storing a multi-digit decimal numerical value of the distance traversed by a vehicle having a signal transmitter which gives off electric counting pulses, and particularly an electronic tachometer. The improvement consists of the numerical value being able to be stored by means for coding the numerical value in a one-step code for a non-volatile storage formed of floating-gate storage cells.

Abstract: The invention is particularly useful for counting the passengers moving into and out of a common carrier vehicle such as a motor bus. Three ultrasonic ranging stations are provided to determine the presence and absence of passengers at three successive positions at the bus entrance. The three positions may correspond respectively to three steps through the entrance. Sequence logic circuitry is included for analyzing the sequence of detection of passengers at the three different ranging stations to establish a count of the number of passengers entering or leaving.

Abstract: A target processor utilizing a feedback loop to maintain a constant false alarm rate for variable level video input signals with noise or noise plus clutter on the input signal. The processor includes three serially connected stages of binary coincidence detectors which comprise a threshold detector for processing video signals which exceed a threshold level, an M of N detector for providing an alarm for each range gate having a count of M or greater pulses, and a P of Q detector for generating a target alarm after at least P or greater frequencies have been transmitted.

Abstract: An improved ground-plane antenna with a quarterwave resonant radiating rod (1) made of a hollow tube in which a central earthing rod (7) is arranged to form with the internal cylindrical wall of the radiating rod a line section short-circuited at the upper end, and a further line section (16) open at the lower end is arranged in the extension of the short-circuited line section to form a combined tapped line section therewith having an electrical length substantially equal to the quarterwavelength, in which the combined line section is coupled with its tapping points in parallel to the input terminals of the antenna, whereby the susceptance represented by the combined line section is capable of compensating the changes of the antenna reactance within a fairly wide band.

Abstract: An antenna matching apparatus tunable to different frequencies is disclosed for use with a high frequency transmitter that is rapidly switchable between different transmitting frequencies by a control unit according to a predetermined frequency scheme. This apparatus which is tunable as quickly as the transmitter, includes two or more antenna tuning means tuned to different frequencies which are tuned to different frequencies and switched rapidly by the control unit.

Abstract: A system for detecting a neutral state of a transmission for an engine mounted on a vehicle comprises an engine speed detecting device for producing an engine speed output signal in proportion to the engine speed; and a vehicle speed detecting device for producing a vehicle speed output signal in proportion to the vehicle speed. An operation circuit is provided for judging whether the ratio of the engine speed output to the vehicle speed output is in a transmission ratio range dependent on the transmission. The operation circuit is so arranged as to produce at least one neutral state output when the ratio of the engine speed output to the vehicle speed output is not in the transmission ratio range.

Abstract: Multiband dipole antennas connected to a coaxial feeder are usually not balanced and are not operated at maximum efficiency. In the present invention pairs of capacitors are connected at the feed point of respective half-wave dipoles, associated with different frequency bands to reduce these deficiencies. A similar technique is useful for single band half-wave dipoles and allows unbalanced multiband ground plane antennas to be constructed.

Abstract: The directivity as well as the gain of an antenna element associated with a finite length reflector, which includes a feed antenna such as a dipole antenna and a reflector having a finite length of several wavelengths or less, are improved by disposing a non-feed loop element having a peripheral length of about 2 wavelengths along a common imaginary plane with the feed antenna so as to surround the feed antenna. Preferably, the non-feed loop element is disposed in parallel to the reflector, and more preferably it is disposed nearly symmetrically with respect to the center of the feed antenna.

Abstract: The antenna feed includes a waveguide radiator with a conductive flange positioned about the waveguide near its radiating end. A dielectric element is positioned about the waveguide between the flange and the radiating end and establishes the dielectric surface impedance seen by the waveguide. The dielectric element may consist of one or more layers of dielectric material to form a composite dielectric. One of the layers may be an air gap adjacent to the flange. The size and position of the flange and dielectric element will control the radiation pattern of the beam from the feed.

Abstract: An apparatus for counting the number of paper sheets is described in which a target number entered by an entry unit is stored in a target number memory and displayed in a target number display section, the count number supplied from a sensor and counter section since the time of start of counting is displayed in a count number display section and compared to said target number, and the counting number is discontinued in case of coincidence between said count number and the target number. According to the invention, the entry section has a batch key, a plus key and a minus key. A gross or an approximate number is entered by the batch key and incremented or decremented by the plus or minus key for adjustment of the gross number to the desired number. When the gross number is the infinite number, a continuous counting operation is performed until depletion of the paper sheets.

Abstract: An imbalance equilibrating system for an airborne radar system in which the rotation about its axis, in a clockwise or counterclockwise direction, of a pivoting element placed in cantilever relationship with respect to its axis of rotation, causes cables to wind about a pulley which is integral with and has the same axis of rotation as the pivoting element, whereby the cables transfer the rotational movement of the pivoting element to an antagonistic movement of a remotely located equilibrating mass.

Abstract: Apparatus for sensing a missing or broken wafer in an automated wafer transfer system. The apparatus includes means for moving a wafer transfer mechanism from a first position along a prescribed path. A counter coupled to an oscillator is enabled when the wafer transfer mechanism and a wafer are moved away from the first position. A photosensor senses the presence of the wafer at a second position along the prescribed path and inhibits the counter. The count stored in the counter is compared with a predetermined count corresponding to the time required for movement of an unbroken wafer to the second position. If the counts do not agree, a missing or broken wafer is indicated and corrective action is taken.

Abstract: This invention relates to an improvement in a collapsible antenna reflector with rigid, collapsible elements for high accuracy of contour, composed of a central panel and collapsible segments mounted thereto by means of joints, the improvement comprising means mounting the individual collapsible segments (5) so that in their collapsed state their contour curvature is equidirectional, with the individual collapsible segments being mounted perpendicularly to the central panel and being arranged from its periphery obliquely to the antenna axis.

Abstract: An antenna array comprises a dielectric image waveguide (3) acting as a feeder, which may be of the insular or inverted-strip type, in contact with a dielectric sheet (1). On the sheet (1) is located a plurality of strips (4) of metallizing extending outwards from the feeder-guide (3). The inner ends of the strips are located to couple with the feeder-guide and their outer ends act to radiate or receive most of the power. Preferably the mode propagated in the feeder-guide is an E.sub.mn.sup.y mode higher than the fundamental, suitably the E.sub.21.sup.y mode.

Abstract: A primary source for a space communications antenna requiring a mode extractor means comprises more especially a horn with two types of evenly spaced alternate corrugations whose depth decreases, for each of the types, from the neck to the opening, followed by a band separator of the quasi-optical filter type, followed by a mode extractor means placed in series in the reception channel of the primary source.

Abstract: A portable antenna is disclosed herein having a pedestal supporting on octagon frame via a universal mounting mechanism. A parabolic reflecting antenna is fixed onto a plurality of mounting sockets on the frame and includes a plurality of individual and separate wedge-shaped panels adapted to be assembled in a side-by-side relationship to provide a unitary construction. Each panel includes outwardly projecting flanges on its oppsite edge marginal regions cooperating with similar flanges on adjacent panels to define a combined mounting flange to be insertably aligned with and received into the mounting sockets carried on the frame. Fasteners secure the flanges and sockets together in a fixed relationship.