Abstract:
In some embodiments, an electrical device can include a body having a shape that extends along a longitudinal direction, and a set of electrodes implemented on the body at different locations along the longitudinal direction and configured to allow the electrical device to be positioned and mounted to a surface. The set of electrodes can include first and second electrodes configured to provide first and second engagements with the surface, respectively, and to allow a settling motion when the electrical device is positioned on the surface. The set of electrodes can further include a selected electrode having a side configured to allow the settling motion and an engagement portion configured to stop the settling motion and thereby provide a third engagement with the surface.
Abstract:
In some embodiments, an electrical device can include a body having a shape that extends along a longitudinal direction, and a set of electrodes implemented on the body at different locations along the longitudinal direction and configured to allow the electrical device to be positioned and mounted to a surface. The set of electrodes can include first and second electrodes configured to provide first and second engagements with the surface, respectively, and to allow a settling motion when the electrical device is positioned on the surface. The set of electrodes can further include a selected electrode having a side configured to allow the settling motion and an engagement portion configured to stop the settling motion and thereby provide a third engagement with the surface.
Abstract:
One example solid state lighting type lamp for a three-way luminaire includes a power source, a controller, an output stage, switching logic circuitry and multiple sets of light emitters. The logic circuitry receives input signals from tip and ring power contacts on a lamp base. The controller provides power from the power source to the output stage which is controlled by the switch logic circuitry to selectively apply power to different ones of the sets of light emitters responsive to the input signals. Each set of light emitters emit light having different color temperatures. In another three-way luminaire example, the control circuitry is configured to control drive current in a sequence to toggle the lamp consecutively between an OFF state and ON state in response to inputs from a three-way socket. Another type of lamp includes circuitry to permanently disable the lamp on detection of an end-of-life condition.
Abstract:
A gas discharge lamp (1) with a discharge vessel (2), a first electrode (3) projecting into the discharge vessel (2), and a second electrode (4) projecting into the discharge vessel (2) is described. The first electrode (3) is connected to an electrically conductive first conductor surface (5) surrounding the discharge vessel (2). The second electrode (4) is connected to an electrically conductive second conductor surface (6) surrounding the discharge vessel (2) and arranged such that it overlaps the first conductor surface (5) so as to form a capacitance (C).
Abstract:
A vacuum electron device comprises an evacuated envelope containing a cathode for supplying electrons to form an electron beam, an anode spaced from the cathode for receiving the electron beam, and a sensor electrode located between the cathode and the anode.
Abstract:
A non-power generating current limiting device such as a field effect transistor is provided to output a regulated current in dependence upon a control voltage. An electron field emitter is connected to a drain or output of the non-power generating current limiting device to receive the regulated current. A tip of the electron field emitter emits electrons towards a collector anode. An extractor gate can be provided between the electron field emitter and the collector anode to control the rate of electron emission from the electron field emitter. Because the non-power generating current limiting device regulates the current to the electron field emitter, a maximum current output of the electron field emitter is limited to the regulated current from the voltage controlled current source. The electron field emitter is thus protected from destruction due to excess current. The non-power generating current limiting device can also be used to modulate electron emission from the field emitter.
Abstract:
A cold cathode field emission device that includes a ballast resistor (202, 303, 402) integrally formed therewith and coupled to the emitter (204, 302, 403) to allow appropriate compensation for manufacturing and performance variations in field emission from the attached emitter.
Abstract:
Disclosed is a light saver device to be used in combination with a bayonet-type lamp and socket, wherein the light saver device comprises a pair of circular plate contacts having a diode mounted therebetween, three plastic insulating sheets being bonded together with the elongated plate contacts positioned between the sheets, an adhesive tape base mounted to the outer side of one of the sheets, and one of the sheets having a pair of tabs for securing the light saver device to a pair of pins extending from the lamp.
Abstract:
The heater filaments of the cathode-ray guns of a color television picture tube are connected across the low-voltage secondary winding of a transformer, the primary of which is connected across the terminals of a conventional household alternating current supply through a thermistor to effect gradual increase of potential across the secondary winding. As the filament voltage increases to normal operating potential, the degree of intensity of the lamps indicates the relative electron emission of the cathodes. As the filament voltage increases above normal operating potential, the temperature of the filament and cathode are increased above normal to effect progressive removal of contaminating materials from the cathodes. The cathodes are connected to one terminal of the alternating current supply and the control grids are connected to the other terminal of the alternating current supply each through a dropping resistance, circuit breaker and indicator lamp, to produce a pulsating direct current which effects progressive drawing of fresh electron emissive material to the surface of the cathodes. This automatic progressive restoration of the cathode is evidenced by progressive brightening of the lamps and when restoration of each cathode is completed, the associated circuit breaker opens automatically to terminate the treatment.