Abstract:
An electronic ballast for driving a gas discharge lamp includes a rectifier, a valley-fill circuit, an inverter having first and second series-connected controllably conductive switches having complementary duty cycles, a control circuit for controlling the controllably conductive switches, and an independent cat ear power supply to provide power to the ballast control circuits. The result is a ballast having substantially improved power factor, THD, and current crest factor. In a preferred embodiment, the valley-fill circuit includes an energy storage device that stores energy in response to a controllably conductive switch. In an especially preferred embodiment, the controllably conductive switch of the valley-fill circuit is also one of the switches of the inverter.
Abstract:
A compact antenna for use in a device for controlling the power delivered to an electric load and operable to transmit or receive radio frequency signals at a specified frequency is presented. The antenna comprises a first loop of conductive material having a capacitance and an inductance forming a circuit being resonant at the specified frequency, and a second loop of conductive material having two ends adapted to be electrically coupled to an electronic circuit. The second loop is substantially only magnetically coupled to the first loop and is electrically isolated from the first loop. In a first embodiment of the antenna, the first and second loops are formed on respective first and second printed circuit boards, which allow for a small, low-cost antenna that is easy to manufacture and maximizes efficiency. When the antenna is installed in a load control device, such as a dimmer, the first loop of the antenna is mounted on an outer surface of the device. The second loop of the antenna may be at a high-voltage potential such as line voltage.
Abstract:
An apparatus for controlling the speed of an AC motor comprising a switch adapted to be coupled in parallel with power terminals for the AC motor; a capacitor coupled in series with the parallel combination of the switch and the motor; the capacitor adapted to provide an AC supply voltage from an AC source to the parallel circuit comprising the motor and the switch; and a control circuit for controlling the conduction time of the switch in order to vary the speed of the motor. The switch is preferably pulse-width modulated at a frequency twice the line frequency of the AC supply voltage, and the switch is turned on when the voltage across the AC motor is zero volts. The apparatus is operable to provide for continuously variable control of the motor speed while minimizing acoustic noise in the motor.
Abstract:
The present invention is directed to a multiple chamber dispenser with a dual position dispensing cap. The dispenser container has a circular top, a bottom, an outer wall structure and a plurality of chambers within the outer wall structure, e.g. two chambers. The dispenser container circular top has threading and has an upper stop and a lower stop located on an outside surface of the circular top. The chambers are separated by at least one divider wall that extents to the circular top of the dispense container. A cap is connected to the dispensing container and has at least one dispensing orifice, centrally located in preferred embodiments. The cap has a side wall structure with threading on its inside, and has a fist position, being a lower position on the dispenser container, and also being a closed position, and has a second position, being a higher position on the dispenser container, and also being an open position for dispensing.
Abstract:
An actuation device capable of adapting a conventional pump dispenser into a lever or trigger sprayer, the actuation device having a housing comprised of a first part that is removably connected to a second part and when the two parts are connected, a pump dispenser is received within the housing. The first part of the housing has an opening adjacent the nozzle of the pump dispenser that allows the contents of the pump dispenser to be sprayed out through the opening. A lever is hingedly mounted to the housing via a plurality of trunnions and associated trunnion cradles and has a leg portion that makes holding and squeezing the lever easy and comfortable. The lever also has at least one arm disposed adjacent an annular rim of the skirt of the pump dispenser so that when the lever is moved, the arm of the lever presses against the annular rim and causes the pump dispenser to actuate and spray fluid from the pump dispenser to the target.
Abstract:
A vial access spike adapter for connecting a pump dispenser to a vial. The vial access spike adapter is capable of piercing a seal insert in the vial and guiding a dip tube of a pump dispenser into the vial so the contents of the vial can be dispensed directly from the vial. The vial access spike adapter has an upper tubular body with a threaded connection at one end, an annular snap ring connection at the opposite end and a hollow interior throughout. Within the hollow interior, is a central passage used to facilitate the placement of the dip tube into the interior of the vial. A central support is integral with and supports the central passage within the hollow body, and seals the vial access spike adapter to prevent leakage.
Abstract:
A push-pull dispensing cap is described for a container having an open-necked top. There is a first cap member, attachable to an open-necked container, which has an outside thread for engagement with threading of an overcap, and has an upwardly projecting hollow portion with at least one dispensing port. It also is slideably attached to a second cap member such that the second cap member may cyclically moved with a first, closed position being downward, and a second, open position being upward. The second cap member has a dispensing port thereon and has an outwardly projecting ridge thereon with a cut-out located on the ridge to permit passage therethrough of a protrusion located inside the overcap. The second cap member is attached to the first cap member so as to prevent any of substantial horizontal rotation of it relative to the first cap member. The overcap is adapted to fit over the second cap member, has a top and a sidewall, has internal threading adapted to thread with the outside of the first cap member.
Abstract:
The present invention is a container dispensing cap closure, which includes a container, a circular base and a pivot cap. The container has a neck, an open top and external threading for affixing a circular base thereto. The circular base has a circular inside wall with internal threading for attachment to the neck of the container. The circular base has an inwardly flexible leveraged sidewall trigger with a catch thereon which, when flexed inwardly, engages and pivots a pivot cap upwardly into an open position. The circular base has an upwardly extending guide-wall that regulates the pivotal rotation of the pivot cap, and an opening from which contents may be dispensed. The pivot cap is attached to the circular base by a clasp-element which is attached to two raised sidewall tracts located on the top of the circular base. The raised sidewall tracts comprise impressions which interact with snap-in-bead protrusions located on the clasp-element, thus allowing the pivot cap to pivot thereabout. The snap-in-bead protrusions and impressions are in frictional contact thus stabilizing the pivotal rotation of the pivot cap. The pivot cap also has a flat top and a lip which extends downwardly about the perimeter of the pivot cap. When the pivot cap is in a closed position the lip rests upon the top of the circular base. The pivot cap has a plug which, when the pivot cap is in a closed position, seals the opening on the circular base.
Abstract:
A dimmer circuit provides AC power to an inductive lighting load in series with the dimmer circuit. A bidirectional semiconductor switch has a control electrode with a control signal for determining the power provided to the load. The switch in normal operation is controlled to block voltage in first and second half-cycles of the AC voltage. In a failure mode it can block the AC voltage in only one half-cycle. A controller for the switch determines the failure mode of the switch occurs which can cause an asymmetry between the half-cycles and thus a DC voltage component. A power supply supplies power to the controller from across the dimmer circuit. The controller drives the switch into substantially full conduction during most of the half-cycle which the switch is able to control; and drive the switch into non-conduction for a period of time during that same half-cycle so as to reduce the DC voltage component to prevent excessive transformer heating. The power supply is provided with sufficient voltage from the AC voltage to enable the controller to continue to operate.
Abstract:
A two-wire dimmer for control of a lighting load from an alternating-current (AC) power source includes a semiconductor switch, a power supply, and a control circuit. The power supply includes an energy storage input capacitor that is able to charge only when the semiconductor switch is non-conductive. The control circuit continuously monitors the voltage on the input capacitor and automatically decreases the maximum allowable conduction time of the semiconductor switch when the voltage falls to a level that will not guarantee proper operation of the power supply. The dimmer of the present invention is able to provide the maximum possible conduction time of the semiconductor switch at high end (i.e., maximum light intensity) while simultaneously ensuring sufficient charging time for proper operation of the power supply, and hence, the dimmer.