| Patent Number |
Title Of Patent |
Date Issued |
| D320283 |
Fluorescent lighting fixture grill |
September 24, 1991 |
|
| D308259 |
Fluorescent lighting fixture |
May 29, 1990 |
|
| 5623184 |
Lamp circuit with filament current fault monitoring means |
April 22, 1997 |
| A ballast arrangement is disclosed for use in powering fluorescent and other gas discharge lamps. The ballast arrangement controls the arc voltage provide by an arc voltage oscillator independent of the filament voltage provided by a filament voltage oscillator. In this manner, safe |
| 5595432 |
Lighting fixture |
January 21, 1997 |
| A fighting fixture disclosed is designed for installation in a cove of a public transit vehicle providing ready access to a space behind it, without requiring a variety of specially designed fixtures for special access requirements. The fixture comprises a pair of battens extending g |
| 5581246 |
Multiple device control system |
December 3, 1996 |
| A train communication and control system is described having the cars of the train connected by a two-wire train line running continuously from car to car. Each car has a transmitting circuit and a receiving circuit connected across the line. Any car may be selected to be a master unit. |
| 5420763 |
Lighting fixture |
May 30, 1995 |
| A lighting fixture disclosed is designed for installation in a cove of a public transit vehicle providing ready access to a space behind it, without requiring a variety of specially designed fixtures for special access requirements. The fixture comprises a pair of battens extending g |
| 5377087 |
Passenger reading light |
December 27, 1994 |
| An orientable passenger reading light is provided for vehicles having a two-part removable bezel arrangement. The lower part of the bezel is freely rotatable to disguise the method of relamping by requiring correct manipulation of the upper bezel part to allow release and removal of the |
| 5349272 |
Multiple output ballast circuit |
September 20, 1994 |
| A ballast arrangement is disclosed for use in powering fluorescent and other gas discharge lamps. The ballast arrangement provides both full current and low current outputs for multiple sets of lamps so that dual lamps can be powered simultaneously, at the same or different output le |
| 5311454 |
Digital multiplier-accumulator |
May 10, 1994 |
| A digital multiplier accumulator for performing the sum of products operation on two or more signal groups is described. The signal groups may be digitally coded and weighted. The multiplier accumulator will multiply selected signals from each signal group. Additionally, the multiplier |
| 5304007 |
Thermal printhead balanced spring mount |
April 19, 1994 |
| A thermal printhead spring mount is provided, wherein a spring engages a printhead carrier at two points along the width of the carrier, the points being equidistant from the center of the carrier. A cam engages the center of the spring and selectively biases the spring against the carri |
| 5272627 |
Data converter for CT data acquisition system |
December 21, 1993 |
| A data acquisition system employs data conversion circuitry well suited to large multisensor systems such as computerized tomography systems utilizing X-ray detectors. The data conversion system consists of a number of detectors or similar signal sources and a corresponding number of dat |
| 5261831 |
Fluorescent lamp socket |
November 16, 1993 |
| A fluorescent lamp socket disclosed is designed for use in environments subject to substantial vibration or shock. A fluorescent lamp is supported by its ferrule or end cap to firmly couple the lamp to the socket. The socket is provided with a retainer element for ready insertion or remo |
| 5219217 |
Illuminating system |
June 15, 1993 |
| An arrangement and method for providing an elongated light source, such as for illuminating a sign or the interior of a mass transit vehicle or other display, which includes emitting light from a light source into an elongated tubular member having a portion lined with a high reflectance |
| 5171084 |
Apparatus for diffusing light and directing air circulation |
December 15, 1992 |
| An apparatus for diffusing light and for directing circulation of air. A support (3), a grill panel (2) and a socket (12) are mounted together to form the apparatus. The support (30) is mounted to a base (64, 68). A nozzle (94) within the base (64, 68) creates a venturi effect by providi |
| 5170179 |
Thermal printhead with improved resolution and inter-dot isolation |
December 8, 1992 |
| Pulse fingers are disposed on a heat-generating material which fingers are pulsed to change the resistance of portions of the heat-generating material. By such change in the resistance of the heat-generating material, electrical current diffusion is prevented and heat diffusion is pe |
| 5142277 |
Multiple device control system |
August 25, 1992 |
| A train communication and control system is described having the cars of the train connected by a two-wire train line running continuously from car to car. Any car may be selected to be a master unit. The selection of one car as a master unit disconnects the power sources of all other ca |
| 5136486 |
Lighting fixture with diffuser for light and air |
August 4, 1992 |
| A fixture for a fluorescent lamp includes a diffuser panel. The diffuser panel has a frame and longitudinal elements supported by the frame and spaced apart from one another. At least some of the elements are constructed of a material to allow diffusion of impinging light. Preferred |
| 5038256 |
Lighting fixture with diffuser for light and air |
August 6, 1991 |
| A fixture for a fluorescent lamp includes a diffuser panel. The diffuser panel has a frame and longitudinal elements supported by the frame and spaced apart from one another. At least some of the elements are constructed of a material to allow diffusion of impinging light. Preferred |
| 5031080 |
Portable cockpit light assembly |
July 9, 1991 |
| A portable incandescent light assembly having a selectably interposable filter is disclosed. The light assembly is particularly applicable to night vision situations for airplane pilots. The light assembly comprises a housing in which a light source and a filter for filtering out infra-r |
| 5016143 |
Illuminating system |
May 14, 1991 |
| An arrangement and method for providing an elongated light source, such as for illuminating a sign or the like or, for other display, which includes emitting light from an exterior light source into an inner tube having a portion lined with a high reflectance film of prismatic lenses, th |
| 5005305 |
Magnetically operated display device |
April 9, 1991 |
| A magnetically operated display element having contrasting opposite sides, is symmetrically mounted in a surrounding frame for pivoting about an axis. A permanent magnet within the display element has poles on opposite sides of the pivoting axis. A U-shaped electromagnet has its pole pie |
| 4996632 |
Multi-color illuminating system |
February 26, 1991 |
| An arrangement and method for providing an elongated light source, such as for illuminating a sign or the like or for other display, which includes emitting light from an exterior light source into an inner tube having a portion lined with a high reflectance film of prismatic lenses, the |
| 4934886 |
Fastening assembly and method of fastening |
June 19, 1990 |
| A method of fastening and a fastening assembly are disclosed, where a nut may be retained in a grooved channel by a resilient retainer. The retainer has a central portion with an opening in registry with the threaded opening of the nut and also has two wings extending in opposite directi |
| 4907142 |
Lighting fixture with diffuser for light and air |
March 6, 1990 |
| A fixture for a fluorescent lamp includes a diffuser panel. The diffuser panel has a frame and longitudinal elements supported by the frame and spaced apart from one another. At least some of the elements are constructed of a material to allow diffusion of impinging light. Preferred |
| 4774843 |
Strain gage |
October 4, 1988 |
| In an improved strain gage for measuring pressure differentials within areas of varying pressure there is provided a flexible sapphire diaphragm having disposed thereon a Wheatstone bridge. The diaphragm being attached to a base portion by way of a glass bonding material. The base portio |
| 4764858 |
Energy controller |
August 16, 1988 |
| A circuit for delivering a predetermined amount of energy to a load without regulating the voltage across the load is described. An a.c. or rectified sine wave is controlled. There is no capacitive smoothing of the applied voltage. A time counter is activated at the beginning of each hal |
| 4713145 |
Method of etching etch-resistant materials |
December 15, 1987 |
| A method for etching sapphire and other etch-resistant materials is disclosed. The method consists of preparing a hot, precipitated-gel form of phosphoric acid solution and immersing the item to be etched in the hot, precipitated-gel. The gel is prepared by heating a liquid phosphoric |
| 4707673 |
Directional coupling transformer for bi-directional full duplex data bus |
November 17, 1987 |
| A directional coupler transformer insensitive to data bus termination failures, includes a ferrite toroid core about which first through fourth windings are wound, the first and second windings being for connection in series with each conductor, respectively, of a data bus for sensing or |
| 4663734 |
Print pulse controller for a termal printhead |
May 5, 1987 |
| A thermal print pulse controller and data shifter accomplishes control of a thermal print pulse by altering the pulse width of the print pulse according to the printing history. Data is obtained from the printhead and recirculated for logical operation with previous records back to the |
| 4661808 |
Variable font display |
April 28, 1987 |
| In a display where all characters are displayed in equal sized spaces, such as a bus or vehicle sign, for example, the problem of characters appearing to merge from a distance is remedied. The spacing between characters is automatically adjusted in accordance with both the characteristic |
| 4626871 |
Thermal print head wear bar |
December 2, 1986 |
| A thermal print head for use in thermal printing apparatus has a pattern of conductive lines for energizing a resistive member overlying a portion of the lines to generate discrete heated spots on the resistive member. A screen-printed protective coating over a portion of the pattern is |
| 4604298 |
Finger line screen printing method and apparatus |
August 5, 1986 |
| A method of screen printing a conductive ink onto a substrate to form a pattern of narrow, closely spaced conductive lines. Before screening, the conductive ink is exposed to ambient air until its viscosity is in the range 700,000 to 900,000 centipoise at 70.degree. Fahrenheit. |
| 4586157 |
Memory transfer unit |
April 29, 1986 |
| A memory transfer unit is provided which permits replacing messages stored in a message display system with a different set of messages stored in the memory transfer unit. A circuit is provided for supplying power from the message display system to the memory transfer unit and for inhibi |
| 4499815 |
Air diffuser |
February 19, 1985 |
| A linear air diffuser is disclosed for the delivery of conditioned air to the interior of a passenger vehicle such as a bus, railcar or the like. The diffuser consists of a frame structure characterized by a pair of open ended longitudinally extending delivery channels situated in a gene |
| 4462018 |
Semiconductor strain gauge with integral compensation resistors |
July 24, 1984 |
| A transducer operating on the strain gauge principle having integral temperature compensation and calibration resistors is disclosed. In the presently preferred embodiment, a silicon dioxide layer is disposed on a silicon substrate. Platinum alloy strain gauge resistors are disposed on |
| 4405893 |
Pulse width regulator |
September 20, 1983 |
| A high voltage, pulse width regulator circuit wherein the input voltage may be up to twice the voltage rating of pass or switching transistors used in the circuit is disclosed. This is accomplished by dividing the input unregulated DC voltage or full wave rectified AC voltage in half. Th |
| 4352323 |
Air diffuser |
October 5, 1982 |
| A linear air diffuser is disclosed for the delivery of conditioned air to the interior of a passenger vehicle such as a bus, railcar or the like. The diffuser consists of a frame structure characterized by a pair of open ended longitudinally extending delivery channels situated in a gene |
| 4287772 |
Strain gage transducer and process for fabricating same |
September 8, 1981 |
| A transducer which includes a metal strain gage material formed on a flexible monocrystalline silicon diaphragm is disclosed. The transducer is fabricated to a large extent with semiconductor processing steps. Gold is diffused into a platinum-tungsten gage material. This allows the gage |
| 4188258 |
Process for fabricating strain gage transducer |
February 12, 1980 |
| A transducer which includes a metal strain gage material formed on a flexible monocrystalline silicon diaphragm is disclosed. The transducer is fabricated to a large extent with semiconductor processing steps. Gold is diffused into a platinum-tungsten gage material. This allows the gage |
| 4161771 |
Inverter ripple regulator |
July 17, 1979 |
| A sinusoidal-like output is obtained from a source of DC by adding the outputs of two or more DC to AC inverters, producing flat-topped pules combining to provide a normally near ideal stepped sinusoidal-like waveform, with the output of a buck-boost circuit which produces bucking or |
| 4142227 |
Combination passenger reading light and air ventilator |
February 27, 1979 |
| A combination orientable light and ventilating fixture includes a support and a ball housing adjustably mounted therein, the ball housing including front and rear openings and an inner chamber. A socket assembly for an electric lamp is mounted on the housing behind the rear opening and h |
| 4076361 |
Electrical connector assembly for use with remote manipulator |
February 28, 1978 |
| The remote, manipulator, attachable, connector apparatus includes telescoping outer and inner connector units, one of which preferably the outer one, has on the end thereof remote from the other connector unit an elbow portion laterally extending therefrom which preferably can be swi |
| 4052628 |
Dynamic, shear-mode piezoelectric pressure sensor |
October 4, 1977 |
| A dynamic pressure sensor employing piezoelectric ceramic elements in a shear mode. The ceramic elements are bolted in a sandwich-like assembly which includes collector plates to a support member; a piezoelectric compensating assembly is also bolted to this support member. The sensor |
| 4043197 |
Flow rate transducer |
August 23, 1977 |
| A rate of fluid flow measuring device utilizing a pair of helical Bourdon tubes to generate output signals, from two linear variable differential transformers, which are functions of fluid pressure and flow velocity. A thermocouple generates an output signal which is a function of the |
| 4040738 |
Railroad track profile spacing and alignment apparatus |
August 9, 1977 |
| Apparatus for sensing the profile, spacing and/or alignment of railroad tracks comprising one or more assemblies or pairs of range sensor units, preferably at least one directing a light image upon the top surface of a track rail and at least one directing a similar light image on the la |
| 3961155 |
Thermal printing element arrays |
June 1, 1976 |
| An array of elongated thermal printing elements which may be selectively energized through suitable electrodes connected to the long dimension of the thermal printing elements to thermally print numeric characters or other information. |
