摘要:
A highly selective frequency filter is created from lossy components such as found in standard integrated circuit technologies, including particularly CMOS technologies, without the use of active loss cancellation circuitry. The filter configuration is based on using inductively coupled planar inductors for introducing a mutual inductance factor that advantageously alters the frequency response of the filter.
摘要:
A skewer shield includes a shielding body adapted for placement on a cooking grill, and a skewer engaging portion extending upwardly from the shielding body. The skewer engaging portion has a top resting edge on which food-ladened skewers can be rested in such a manner that the shielding body of the skewer shield prevents the handle ends of the skewers from heating up.
摘要:
A debris shield for a rotary tool or machine for collecting debris generated while cutting or drilling holes in a work surface has a debris collection housing having a top structure, side walls depending from said top cover structure to form a debris collection chamber, an open bottom with a surface contact rim, and a compression axis extending through the housing's top structure and bottom opening. In one aspect of the invention, the debris collection housing is a bellows housing with a vacuum port, and has a shank-holding and vent assembly in top structure of the bellows housing for receiving and rotatably holding the shank of a rotary surface working implement such as a drill bit, spade bit or hole saw.
摘要:
A lamp heat extractor device for lowering the cold spot temperature of a fluorescent lamp includes a base portion adapted to be attached to a heat conductive portion of the fluorescent lighting fixture proximate the fixture's lamp socket or sockets, and an extended sleeve end portion thermally connected to the base portion by a conductive connector portion. The conductive connector portion positions the extended sleeve portion so that it contacts the cold spot end of the fluorescent lamp or lamps held by the lamp sockets of the fixture to allow heat transfer to the fixture housing to which the heat extractor device is attached. Suitably, the outer surface of the extended sleeve end portion of the heat extractor device can have a plurality of radially extending fins for increasing surface area for heat radiation from the extended sleeve portion, thereby increasing the overall heat extracting efficiency of the device. The device can have two or more sleeve ends thermally interconnected to the base portion for contacting the cold spot ends of two or more fluorescent lamps.
摘要:
Fluorescent lighting fixture modules for indirect lighting of interior spaces, each module including at least one, and preferably a pair of side-by-side parallel linear indirect fluorescent lighting fixture elements suspended at fixed grid pattern locations beneath the ceiling of the open interior space. Each of the linear indirect lighting fixture elements is preferably no greater than approximately six feet in length with a suitable length being somewhat greater than four feet where a four foot lamp is used. Where the fixture elements are provided in pairs, each is suspended below the ceiling at its fixed grid location by a suitable hanger structure with a preferred overall fixture module width of approximately four feet.
摘要:
An umbrella base is comprised of a body portion containing a power source for powering umbrella lights or electrical devices or appliances used around the umbrella or other furniture accessory held by the base. A power console is provided for use on or above the base to provide connectivity to the power supply.
摘要:
An improved contactor nest for receiving and holding IC devices against a pin board interposer during the test or burn-in of the devices includes a frame having an IC pocket with a top opening, which is oversized in relation to the footprint of the IC device for which the contactor is designed, and centering guide walls for guiding an IC device to be tested into the pocket from the oversized top opening to the IC device seating plane. The centering guide walls have a gradual angle relative to the insertion axis of the IC pocket, and extend down to a bottom perimeter portion of the IC pocket immediately adjacent the IC seating plane for gradually centering the IC device in the pocket as the IC device approaches the seating plane. Preferably, the angled guide walls extend far enough into the IC pocket to allow the spring pins of the pin board interposer to scrub the contact pads of the IC devices as the IC device is being centered.