Abstract: A moving map display is provided to represent the location of a vehicle such as an aircraft on a video display of a map. Map images are scanned by a remote pickup unit (40) using flying spot scanning techniques to scan transparencies (51) of sections of the map. In order to increase the resolution of map images, each transparency (51) is divided into a plurality of sections and an image of the flying spot from a CRT (45) is superimposed simultaneously onto the nine sections, using an optical tunnel. In order to scan only the desired portions of these images and in order to produce a coherent display, the images are selectively gated "on", electronically or by using light shuttering techniques. In the preferred embodiment, four of a group of nine images are used to create a given display, although other combinations are possible.The resultant display is a composite video modulated raster derived from the scanned images on the slide (51).

Abstract: A motor for an inertial sensing instrument includes a permanent magnet rotor and a stator having a driving winding inductively coupled to a sensing winding, with both windings connected to a common impedance. A feedback arrangement is provided which compensates for noise inducted by the common impedance in a sensing signal provided by the sensing winding.

Abstract: A Raster and Stroke Writing Deflection Amplifier Arrangement for a cathode ray tube (CRT) is disclosed which uses a conventional vertical oscillator and vertical deflection amplifier and a conventional horizontal oscillator and synchronous horizontal deflection amplifier, both driving deflection coils for providing vertical and low power horizontal scan operation for raster scan writing of data, and a flyback transformer and rectifier for providing the high D.C. voltage required by the CRT anode by rectification of high surge voltages created during horizontal retrace periods.

Abstract: Disclosed is a moving map display having a mass memory storing a complete map of the terrain to be traversed by a vehicle, a scan memory storing a portion of the complete map corresponding to the area immediately surrounding the vehicle, a computer for controlling the updating of the portion of map stored in the scan memory and for controlling the refreshing of the map data displayed on a cathode ray tube display, a scan memory address generator receiving parameters computed by the computer for generating addresses sequential outputting the digital map data stored in the scan memory in a predetermined sequence, a video display generator for converting the map data output from the scan memory for utilization by the cathode ray tube display, and a timing generator for synchronizing the generation of the addresses by the scan memory address generator with the scan field of the cathode ray tube display.

Abstract: A raised toilet seal is superimposed upon the bowl of a conventional toilet. A clamp has a section which fits into a space provided when the lid and the seat of the conventional toilet are lifted and has another section which engages the back of the raised superimposed toilet seat, whereby the raised superimposed toilet seat is secured to the conventional toilet.

Abstract: An address generator responsible to input parameters for generating addresses to read out the content of a memory along parallel lines disposed at an angle to the orthogonal rows and columns of storage elements. The address generator has a first pair of registers coupled by an adder to generate line corrected X addresses, a second pair of registers coupled by an adder for generating first address corrections, an adder summing said line corrected X addresses with said first address corrections to generate X addresses, a third pair of registers coupled by an adder to generate line corrected Y addresses, a fourth pair of registers coupled by an adder to generate second address corrections, and an adder summing said line corrected Y addresses with said second address corrections to generate Y addresses.

Abstract: A microstrip antenna with a linearly polarized radiating patch is varied in resonant frequency by an electronic tuning technique. A dc bias voltage is combined with the excitation signal to regulate the capacitance of a varactor diode mounted in the antenna structure. In one embodiment the varactor is in shunt with a half wave open circuited radiator and adds electrical length to the antenna, while in another embodiment the varactor is in series with a shorted quarter wave radiator and subtracts electrical length therefrom.

Abstract: A Digital Automatic Gain Control for a display system having a video display driven by a remote display generator including a display processor which generates binary words that are converted by multiplying digital-to-analog converters to analog deflection voltages that are applied to the video display. The deflection voltages applied to the display are sensed and a digital feedback signal is derived therefrom that is returned to the display generator. The digital feedback signal has a word size larger than the word size of the binary words generated by the display processor. The feedback signal is processed and applied to multiplying digital-to-analog converters and output amplifiers to modify the conversion from binary words to analog deflection voltages to thereby accomplish higher display resolution and accuracy than can be achieved by the display processor alone due to limited binary word size.

Abstract: An interface (10) between a first (MC, 30) and second (SC) computer employs a multiplexer (46) and a coupler (48, 50). The first (MC, 30) and second (SC) computers have a first (LA/B, LEX0-15) and second (CX1-21, CA1-15) plurality of information lines, respectively. These computers also each have a group of control lines (36, 42). The multiplexer (46) is connected to the first and second plurality of information lines (LA/B, LEX0-15, CX1-21, CA1-15). The multiplexer (46) is operable to separately switch each of a predetermined group (LEX12-15) within the first plurality (LA/B, LEX0-15) between either member of a different corresponding pair within the second plurality (CX1-21, CA1-15). The multiplexer (46) is also connected to at least one (ESELCX) of the control lines (36) of the first computer (MC, 30). The multiplexer (46) can switch the predetermined group (LEX12-15) in response to a signal on the control lines (ESELCX) of the first computer (MC, 30).

Abstract: A frequency translator receives an input frequency signal and an offset frequency signal, and processes the signals digitally in order to obtain an output from a multiplexer. Pulse trains derived from the input frequency are provided to an N-bit shift register. The outputs from the shift register are provided to a multiplexer which is controlled by count signals from the offset frequency. The multiplexer provides, as its output, a single sideband output at a frequency equal to (f.sub.c -f.sub.os)/N, or (f.sub.c +f.sub.os)/N.

Abstract: A manually operated tool for simultaneously preparing a seed bed, feeding seed and dispersing the seed uniformly in the bed consists of a rake-like structure, the head of which is integrated with an appendage bearing enclosure for containing a supply of seed and for cooperating with the rake-like structure when manipulated to cause controlled scarifying of the ground and efficient and controlled feeding and dispersing of the seed.

Abstract: An adjustably positioned handgrip for ambulatory aids and the like is disclosed which is contoured for maintaining the hand of the user relatively open and comfortably positioned thereon, and for reducing the tendency of the hand to slide away from and off the grip. The handgrip is adjustably mounted on the ambulatory aid to permit its displacement relative thereto to accommodate the particular needs of the user.

Abstract: A video test pattern generator is able to be incrementally adjusted in its number of lines and in its line resolution, and at the same time is able to produce a reference frequency. The reference frequency is established at a selected value and offset from the selected value by an amount necessary to coincide with a multiple of a scan line frequency. This can be accomplished despite changes in scan rate and raster pattern. A stroke generation capability is provided and the system can be utilized with programmable character generation and can produce a high-resolution image with a minimum of hardware. Further advantages include the ability of the system to adapt to new or changed equipment to be tested.

Abstract: The apparatus disclosed includes a punching bag member having a body portion and a neck portion. A supporting member engages the neck portion and is retained by a bracket mounted on a longitudinally extending member. The longitudinally extending member is secured to a vertical supporting structure. The arrangement is such that the bracket is mounted in cantilever-like fashion so that the punching bag member is supported away from the vertical supporting structure and offers resistance to the user when the body portion is struck, and automatically returns to its normal position.

Abstract: Printed Circuit Board Testing Apparatus is disclosed which utilizes a "bed of nails" of contacts with conductive probes mounted in an insulating plate on a grid of 0.050 inch spacing to make a plurality of electrical contacts with a printed circuit board under test. This large number of contacts are all connected to the edge of a plurality of printed circuit boards mounted perpendicular to the back of the plate. Paths on each of these printed circuit boards electrically connect the probes of the contacts to a large scale integrated circuit chip on which are a plurality of analog switches each controlled by one bit of a binary word stored in a multi-stage shift register also on the chip. One side of each switch is connected to a probe while the other side of the switches are tied together in busses to create a multiplexing arrangement to thereby connect ones of the large number of probes to a relatively small number of input/output leads also connected to the printed circuit boards.

Abstract: A raised toilet seat is superimposed upon the bowl of a conventional toilet. A clamp has a section which fits into a space provided when the lid and the seat of the conventional toilet are lifted, and has another section which fits around the back end of the raised superimposed toilet seat and engages the underside thereof, whereby the raised superimposed toilet seat is secured to the conventional toilet.

Abstract: A discharge valve for granular materials is disclosed which includes a valve body and a disc pivotally supported within the body. The arrangement is such that the disc rests against the body when the valve is closed to provide a seal therewith, and is pivoted by a resiliently biased handle to a plurality of open positions for controlling the flow of material through the valve.

Abstract: A gyrocompass has a gimbal (18;218) rotatable about an upright axis (22;222) and a gyro (10;210) rotatably mounted in this gimbal (18;218) about an inner axis (16;216) transverse to the upright axis (22;222). The gyrocompass also includes a level sensor (30,32;230,232) supported by the gimbal (18;218) for providing a level signal signifying the tilt of the upright axis (22;222) from vertical. Also included is a controller (50) connected to the level sensor (30,32;230,232). The controller includes equipment (50) responsive to the level signal for rotating the gimbal (18;218) into an initial position (SP(1)) at which the level signal has a predetermined value. A method employing the foregoing apparatus includes the steps of rotating the gimbal (18;218) until the level sensor (30,32;230,232) indicates the inner axis (16;216) is horizontal.

Abstract: A resonant flyback boost circuit (21) is used to enchance flyback performance by decreasing the time required for completing flyback on systems using a cathode ray tube and a magnetic deflection coil (11). The boost circuit (21) is parallelly connected across the yoke (11) in order to sense a voltage peak which occurs at the initiation of flyback. The voltage peak is used to initiate a control signal for allowing current to pass from a high voltage source (23) to a supplemental boost capacitor (33). When the potential across the supplemental boost capacitor (33) exceeds the potential across the yoke (11), current flows from the supplemental boost capacitor (33), to an isolating diode (40) to the yoke (11), thereby increasing the current flow through the yoke (11) during the allocated flyback period.The boost circuit (21) reduces flyback time while maintaining a high input impendance when boost is not being applied.