| Patent Number |
Title Of Patent |
Date Issued |
| D400997 |
Light fixture |
November 10, 1998 |
|
| D395408 |
Post light sensor housing |
June 23, 1998 |
|
| D246780 |
Microphone/encoder module |
December 27, 1977 |
|
| D244962 |
Tuner |
July 5, 1977 |
|
| D244616 |
Power amplifier |
June 7, 1977 |
|
| 5894262 |
Electronic doorbell with reversible diode |
April 13, 1999 |
| A doorbell circuit detects when one of a plurality of doorbell switches is depressed and provides an audible indication of the particular doorbell switch depressed. The doorbell circuit includes a detector circuit which will function properly with the diode, normally connected in paralle |
| 5818128 |
Wireless multiple position switching system |
October 6, 1998 |
| A wireless multiple position switching system is disclosed for controlling the application of power to a load device from a plurality of remote locations. The switching system includes a power source, a load device, a master toggle switch and one or more slave toggle switches. A slave to |
| 5626417 |
Motion detector assembly for use with a decorative coach lamp |
May 6, 1997 |
| A motion detector housing assembly is adapted to be integrated into a decorative coach lamp. The motion detector housing assembly includes a motion detector housing and a carrier assembly which may be configured in a manner to be similar to a decorative housing normally disposed on the |
| 5600552 |
Direct current power supply for use in series with a load in an alternating current circuit |
February 4, 1997 |
| A DC power supply for an electronic switching element connected in series with a load in an AC main has a rectifying element and a capacitor parallel to the electronic switching element. Charging of the capacitor is provided by opening the switching element and diverting current from the |
| 5598066 |
Two-level security lighting system |
January 28, 1997 |
| A security light has a quartz-halogen lamp, a photocell, a passive infrared sensor for detecting motion external to the security light, and a circuit which causes the quartz-halogen lamp to operate at about 50% of full brightness in the absence of detection of motion at night, to operate |
| 5340954 |
Wireless multiple position switching system |
August 23, 1994 |
| A wireless multiple position switching system is disclosed for controlling the application of power to a load device from a plurality of remote locations. The switching system includes a power source, a load device, a master toggle switch and one or more slave toggle switches. A slave to |
| 5239205 |
Wireless multiple position switching system |
August 24, 1993 |
| A wireless multiple position switching system is disclosed for controlling the application of power to a load device from a plurality of remote locations. The switching system includes a power source, a load device, a master toggle switch and one or more slave toggle switches. A slave to |
| 5132492 |
Limited travel universally adjustable electrical fixture |
July 21, 1992 |
| A universally movable electrical fixture having a ball carrying base and cooperating electrical fitting carried socket with a unique tab projection that rides in a circumferential slot in the ball shaped to permit free swinging movement of the electrical fixture while limiting the rotati |
| 4679152 |
Navigation system and method for a mobile robot |
July 7, 1987 |
| An opto/acoustic navigation system allows a mobile robot to detect and mate with a floating plug-equipped charging unit upon detection of the need for recharging of the robot's storage battery. A plurality of infrared (IR) emitters and sensors located on the robot and adjacent to the cha |
| 4631749 |
ROM compensated microphone |
December 23, 1986 |
| A microphone is provided with a read only memory (ROM) which is programmed to compensate for the microphone's nonlinear frequency response characteristic during their integration into a single unit. The ROM is thus programmed to provide a frequency response complementary to that exhi |
| 4620285 |
Sonar ranging/light detection system for use in a robot |
October 28, 1986 |
| A sonar ranging/light detection system provides information regarding the surrounding environment to a robot. The sonar portion of the system includes an upper rotating detector which provides 360.degree. coverage as well as a lower, fixed detector located on the front of the robot which |
| 4611343 |
Audio spectrum analyzer operable in a difference mode |
September 9, 1986 |
| A real-time, microprocessor-controlled, 1/2-octave audio spectrum analyzer is capable of operating in a difference mode wherein a current input may be compared with a previously stored input and the difference therebetween directly displayed in real time. A reference response may be disp |
| 4600357 |
Gripper force sensor/controller for robotic arm |
July 15, 1986 |
| A gripper assembly for a robotic arm includes two opposing elements displaced by means of a worm gear arrangement for grasping an object positioned therebetween. The worm gear is driven by a rotary drive motor with a torsion spring coupling the drive motor shaft to the worm. First an |
| 4582434 |
Time corrected, continuously updated clock |
April 15, 1986 |
| Time referenced RF signals are periodically received and processed for updating a microprocessor-controlled clock. The clock automatically scans several frequencies at which the coded RF timing signals are transmitted, selecting the strongest received signal for synchronization therewith |
| 4546348 |
Dual channel curve tracer |
October 8, 1985 |
| A system and method for displaying graphic information and comparing this information with reference data on the faceplate of a cathode ray tube (CRT) is disclosed. The graphic information is provided via a first channel and the reference data is provided via a second channel to a mu |
| 4542326 |
Automatic antenna positioning system |
September 17, 1985 |
| A microprocessor-controlled antenna positioning system for automatically steering a rotatable antenna in the direction of a source of radiated signals is disclosed. The present invention, which is particularly adapted for use in a television receiver or a subscription television receiver |
| 4538875 |
Strain relief clip for electrical cable |
September 3, 1985 |
| A metal clip is capable of securely engaging an electrical cable along the length thereof and is adapter for insertion and stable positioning within an elongated ventilation slot in the cabinet or chassis of an electronic apparatus to provide strain relief for the electrical cable. The s |
| 4527766 |
Video display tilt apparatus |
July 9, 1985 |
| Apparatus for selectively controlling the viewing angle of a video display unit by adjusting the tilt of the unit by means of a single, readily accessible manual control is disclosed. A viewer-operated control knob is used to rotate a shaft located within a linear recessed portion on an |
| 4501458 |
Locking hinge for a printed circuit board |
February 26, 1985 |
| A locking hinge for a printed circuit board includes a pair of molded end pieces defining guide tracks cooperating with tabs on one edge of the printed circuit board for permitting confined pivotal movement thereof between two positions. Slots are formed in the guide tracks for engagemen |
| 4490741 |
Synchronization signal stabilization for video image overlay |
December 25, 1984 |
| A system for stabilizing the synchronization (sync) signal provided to a second video display generating a second video signal for the precise overlay thereon of a first video signal from a first video display having a relatively unstable sync signal is disclosed. The stable sync signal |
| 4423975 |
Form trimming apparatus and method for line printer |
January 3, 1984 |
| In a line printer, form trimming apparatus for automatically separating paper-drive edge perforated tear strips from a continuous paper form comprises a trimmer having hold-down sections which include slots for receiving the sprocket of a paper driver to permit those sections to hold |
| 4422700 |
Grounded multi-pin connector for shielded flat cable |
December 27, 1983 |
| Disclosed is a multi-pin connector for grounding a shielded flat cable enclosed in an insulator. A first conducting element is positioned between and in contact with the receptacle portion of the connector and a grounded portion of the panel through which the connector passes via an aper |
| 4414298 |
Printed circuit board mount for batteries and the like |
November 8, 1983 |
| This disclosure depicts a low-cost assembly for mounting a battery, fuse, or other terminal-bearing electrical device on a printed circuit board supporting an electrically conductive pattern. The assembly comprises a one-piece molded receptacle sized and internally configured to receive |
| 4408172 |
Variable speed tuning selector |
October 4, 1983 |
| A touch sensitive variable speed tuning selector is disclosed. A rotary tuning selector knob includes a finger contact coupled to touch sensitive circuitry. Tuning selector rotation causes a shaft encoder to provide a first pulsed output to tuning circuitry for normal frequency change |
| 4177426 |
Radio control system with pluggable modules for changing system operating frequency |
December 4, 1979 |
| A radio control system for controlling model airplanes, model boats and the like. The system includes a multi-channel transmitter and a multi-channel receiver each operative on the same assigned radio control frequency. The system operating frequency is changeable by exchanging both a sm |
| 4110750 |
Programmable electronic door chime |
August 29, 1978 |
| A programmable electronic door chime is disclosed. The door chime includes programming means to select any desired sequence of notes up to a given maximum which are sounded after momentarily closing a normally open push-button switch. The note sequence is truncated when a different n |
| 4081797 |
On-screen channel display |
March 28, 1978 |
| An on-screen television display including means internally of the receiver for generating characters to indicate the channel number, time of day or other data. The system includes circuit means responsive to the horizontal and vertical sync signals of a television receiver for positionin |
| 4066311 |
Multiple gun cathode ray tube testing, cleaning, and rejuvenating apparatus |
January 3, 1978 |
| Apparatus for testing, cleaning, and rejuvenating three gun, color television, cathode ray picture tubes is disclosed. The apparatus shown permits the cleaning and rejuvenating procedures to be performed separately and on selected, individual ones of the cathode ray tube guns so that |
| 4053790 |
Power line switch with time delay turn off |
October 11, 1977 |
| A time delay switch is disclosed for permitting a load to be powered over a preselected period of time. The switch automatically cuts off power to the load when the period expires. The disclosed switch draws no power in its "Power Cut-Off" state thereby conserving the life of the power s |
| 4034268 |
Speaker protection circuit |
July 5, 1977 |
| A circuit for protecting speakers connected to the output of an audio amplifier. The output of the amplifier is connected to a filter which blocks normal audio frequency signals but passes both high and low frequency signals outside the normal audio range. The positive and negative f |
| 4027146 |
High speed accurate low frequency counter |
May 31, 1977 |
| A frequency counter is disclosed which determines the frequency of an input signal in a high speed and accurate manner. High speed is achieved by utilizing electronic digital processing circuitry. The high degree of accuracy is achieved by a combination of elements which perform period |
| 4011491 |
Motor speed control circuit |
March 8, 1977 |
| A speed-controlling circuit for controlling the rotational speed of a D.C. electric motor in which the electric current is supplied to the D.C. motor through a switching circuit which is periodically open for a predetermined fixed time interval. The switching circuit is controlled by ele |
| 3994237 |
Power supply for realistic control of model railroad engines |
November 30, 1976 |
| A power supply for realistically controlling a model railroad engine. For engine acceleration, the power supply provides an output signal having a linear ramp with pulses superimposed thereon. For constant speed operation, the supply produces a constant output voltage. For decelerati |
| 3938048 |
Frequency measuring apparatus |
February 10, 1976 |
| A multiband radio transceiver capable of operating in the CW, USB, and LSB modes is disclosed including a dual conversion receiver having digital apparatus for displaying the carrier frequency of the signal to which the transceiver is tuned. A mixer is included for deriving a premix sign |
