"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
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| Number | Title | Issue Date |
| 6018701 | False null prevention in optical delay line calibration A method and apparatus for preventing false nulls in an optical delay line by causing the input optical beam to be frequency modulated or variably time delayed so that the components of the optical signal in the output cannot be of equal magnitude and of ... | 01/25/2000 |
| 5971026 | Internal geometry shape design for venturi tube-like gas-air mixing valve A gas-air mixing valve using a tube. The valve has an internal geometry shape for directing the flow of air and gas, including an air inlet, an inlet part from the inlet to a throttle, a gas inlet slot proximate the throttle, and an outlet. The inlet part... | 10/26/1999 |
| 5947240 | Load vibration isolation apparatus A damping mounting structure for use between two members for isolating motion changes which incorporates a plurality of dampers connected between the two members in a closed geometric shape and which uses cross connections between the dampers located on o... | 09/07/1999 |
| 5910788 | Predictive approach integrity A method and apparatus are provided for predicting the position error bound in a satellite positioning system at a future time. The future position of each satellite at the future time is calculated from the trajectory data obtained from each satellite. T... | 06/08/1999 |
| 5893298 | Precision snap-on knob mechanism A knob securing mechanism secures a knob to a shaft. A uniquely shaped retaining clip attaches in a channel of the knob. The channel intersects a bore in the knob which receives the shaft. The shaft has a groove corresponding to the retaining clip such th... | 04/13/1999 |
| 5864687 | Arinc 629 data receiver system having an interface for providing identification to each of the received data word types A memory interface system is operable with a ARINC 629 terminal controller for directing storage of data message received by the terminal controller into a memory device, and associating with each of the words stored in the memory device a tag word which ... | 01/26/1999 |
| 5852412 | Differential ground station repeater A differential global position system wherein a DGPS ground station encodes signals from a plurality of satellites and transmits the encoded signal with satellite-specific pseudo range error signals and a ground station repeaters located remote from the D... | 12/22/1998 |
| 5844503 | Method and apparatus for avionics management A method and apparatus using a simplified language consistent with air traffic control syntax for inputting, displaying and controlling the operation of a flight management system of an aircraft to comply with the instructions received by the pilot from t... | 12/01/1998 |
| 5841969 | Single bus architecture supporting subsystems of various criticality levels Communications systems architecture using a single shared resource bus to interconnect a plurality of subsystems each handling information having a first predetermined importance level and an error detect wrapper for encoding information to and from each ... | 11/24/1998 |
| 5808418 | Control mechanism for regulating the temperature and output of a fluorescent lamp Disclosed is a control mechanism for regulating the temperature of a fluorescent lamp tube located within a housing. The control mechanism includes a cold spot mechanism defining the cold spot of the lamp tube, a heating mechanism, a power supply and a te... | 09/15/1998 |
| 5805100 | Method and apparatus for universal display of alphanumeric data on radar displays A radar system embeds information into the radar picture data for display on any display device. The radar receiver communicates weather data to a signal processor which generates a weather array. An I/O processor transmits data in the weather array to a ... | 09/08/1998 |
| 5801377 | Reducing dither induced errors from path length control resets in a ring laser gyro An integrator in a ring laser gyro that produces an output for changing the path length is reset synchronously with a gyro dither signal to reduce gyro errors from the dithering operation during the reset.... | 09/01/1998 |
| 5786922 | Dual signal subharmonic carrier for systems with unknown delay A system used with a system having a carrier delay to determine the phase of a signal before the delay and to recover the signal after the delay. Two signals at different frequencies are sent through the system having a carrier delay. One signal will be t... | 07/28/1998 |
| 5775472 | Multi-axis tuned mass damper A tuned mass damper using a single predetermined mass connected to springs of predetermined stiffness along each of at least two directions to absorb energy from a vibrating structure to which it is attached and damp the vibrations in a rapid and efficien... | 07/07/1998 |
| 5760737 | Navigation system with solution separation apparatus for detecting accuracy failures A navigation system, incorporating a unique method for detecting failures and determining an accuracy or error bound, has a receiver for receiving signals from several remote transmitters and a processor for determining a position solution from the signal... | 06/02/1998 |
| 5209072 | Refrigeration temperature control system Apparatus for and method of long-term control of the temperature within a refrigerated space, such as the cargo compartment of a refrigeration truck. The technique employs sensors which monitor both discharge and return air. A control algorithm uses the m... | 05/11/1993 |
| 5192874 | Interface circuit for low power drain microprocessor-based thermostat A microprocessor-based power switching circuit responds to a common form of noise by disconnecting power from the controlled apparatus. The microprocessor provides an alternating voltage when power is to be provided, and the alternating voltage is convert... | 03/09/1993 |
| 4521727 | Hall effect circuit with temperature compensation A temperature compensation method and circuit for a Hall element or other element with similar characteristics comprising a pair of current carrying branches, one of which includes a resistor. A pair of transistors in the branches are controlled in unison... | 06/04/1985 |
| 4308142 | Back-flush filtering apparatus, particularly for a house water supply system A backwashable filtering device comprising a housing, a main filter in the housing, an inlet for receiving liquid into the housing and an outlet for discharging liquid from the housing. A rotatably mounted spraying member is disposed in the main filter wh... | 12/29/1981 |