Abstract: The combination of a fluorescent lamp with a grid between its electrodes and control equipment for operating the lamp in an on condition and an off condition by the application of pulses to the grid.

Abstract: A circuit arrangement comprising a DC/AC converter for supplying power to a lamp upon receiving energy from a DC voltage source; the converter includes a branch A having at least one switching element and a control branch connected to the switching element; the control branch comprises a coil shunted by a capacitor; the circuit arrangement also includes a load branch with an inductor connected to a parallel arrangement of an inductance and capacitance.

Abstract: A transformer in which the tops and bottoms of both the primary and secondary coils are insulated from the magnetic circuit by substantially flat plate plastic insulators adjacent both the top and bottom of both coils.

Abstract: A starting and operating circuit for a discharge lamp in which the ballast reactance includes first, second and third coil segments with the third coil segment comprising part of the ignitor circuit and being electrically connected between the first and second coil segments.

Abstract: A fluorescent lighting arrangement including a lamp controller for controlling the light intensity of fluorescent lamps in response to a motion detecting arrangement which receives its operating voltage from the lamp controller.

Abstract: A method for controlling the luminescence of a fluorescent lamp in which a light sensor operates in response to light other than that from the fluorescent lamp striking it to increase the luminescence of the lamp.

Abstract: A multi-tap ballast including wires of two gauges connected to each other to provide a smaller package than previously could be obtained.

Abstract: A new single pole circuit breaker, intended for use in a multipole circuit breaker, is disclosed. Among other distinctions, upon being tripped, a relatively large torque is imparted to the trip lever of the single pole circuit breaker. This is achieved by interacting the contact bar stop pin on the contact bar of the single pole circuit breaker with a camming surface on the trip lever. In addition, when pivotal motion is imparted to the trip lever by an external agent, the trip lever directly engages the toggle mechanism of the circuit breaker, to collapse the toggle mechanism and produce tripping. Moreover, the trip lever has a configuration which permits convenient pivotal mounting to a frame.

Abstract: A controller operates in pre-ignition and ignition phases to obtain stable and reliable control of operation of a half-bridge DC-AC converter in a frequency range which is offset from a resonant frequency of an output circuit which includes a transformer and capacitors and which couples the converter to a fluorescent lamp load. The converter is supplied with a DC voltage from a switched-mode DC-DC supply of a pre-conditioner circuit which responds to a full-wave rectified AC voltage and which is supplied with pulse-width modulated gating pulses from the controller, preferably at a frequency which is the same as that of the converter. The controller monitors signals from the output circuit and pre-conditioner circuits and exercises control to reliable starting and highly efficient lamp operation and to obtain an in-phase proportional relationship of input voltage and current wave forms.

Abstract: Control equipment for motors having two windings and wherein both windings are temporarily connected in parallel to start the motor.

Abstract: A fluorescent lamp control system operable from either an AC power supply of a first frequency or a power supply of a second frequency and which operates the lamp in a dimmed condition when the power supply is that of the second frequency.

Abstract: An electronic ballast which will repeatedly try to ignite gas discharge lamps should they fail to ignite under conditions in which they should have ignited together with means rendering said electronic ballast incapable of trying to ignite said lamps after a predetermined period and said electronic ballast being rendered capable of again trying to ignite said lamps under prescribed conditions.

Abstract: This invention relates to fluorescent lamp controllers and dimming controls for use therewith and more particularly to the provision of a dimming control which provides protective isolation between input terminals and lamp energizing circuitry and which facilitates accurate and safe control of light intensity over a wide range. The invention provides dimming controls which are efficient and highly reliable and are readily and economically available.

Abstract: An arrangement for use with gaseous discharge lamp circuits having power factor capacitors in which the capacitor is disconnected from the circuit when the lamp is not drawing current.

Abstract: A power supply with energy storage means in the form of two capacitors with energy storage means provides improved voltage regulation for the power supply and also serves to store the energy contained in voltage spikes that could otherwise deleteriously effect the power supply.

Abstract: A circuit breaker is constructed to maximize the range of current over which it may operate, and to enhance its safety of operation in both single-pole and multipole embodiments. Improved operating devices are disclosed for both the manual and automatic modes of operation in single-pole or multipole embodiments.

Abstract: A starting and operating circuit for a discharge lamp in which the ballast reactance includes first, second and third coil segments with the third coil segment comprising part of the ignitor circuit and being electrically connected between the first and second coil segments.

Abstract: A control circuit for a dimmer which receives all of its operating power through the control terminals from the dimmer of the fluorescent lamp to which said dimmer is connected.

Abstract: A rapid start fluorescent system which has its starting capacitance connected to a tap on the secondary of the ballast transformer which tap is located at a predetermined number of turns of the secondary.

Abstract: A packing of small components, in which at least one small component (9) is packed by means of a packing body (1) having a multilayer construction and comprising a relatively non-deformable base plate (3) and a thermoplastically deformable elastic carrier layer (5) fixedly connected to the base plate, the small component (9) being depressed into the heated carrier layer (5) thereby forming a nest by thermoplastic deformation of the carrier layer.