摘要:
A solid state, electronic, optical transition device includes a multiple-layer structure of semiconductor material which supports substantially ballistic electron/hole transport at energies above/below the conduction/valance band edge. The multiple layer structure of semiconductor material includes a Fabry-Perot filter element for admitting electrons/holes at a first quasibound energy level above/below the conduction/valance band edge, and for depleting electrons/holes at a second quasibound energy level which is lower/higher than the first energy level. Such an arrangement allows common semiconductor material to be used to produce emitters and detectors and other devices which can operate at any of selected frequencies over a wide range of frequencies.
摘要:
This invention comprises a process for molding a three dimensional decorative article where cored out or raised portions extend to a depth of at least 0.6 centimeter, said process comprising generating electronically a line drawing of said article and electronically displaying the drawing; photographing said drawing to form a photographic transparency; positioning said transparency over a layer of a liquid photopolymer having a depth greater than 0.6 centimeter; exposing said photopolymer through said transparency to actinic light to set the photopolymer; and removing the liquid from the set photopolymer to form a three dimensional article having the appearance of said drawing.
摘要:
A portable fluid collection and removal apparatus includes an elongated flexible conduit having a generally circular outer wall provided with a perforated flat bottom wall. The inner passageway of the conduit is filled with fluid absorbent material whereby fluid beneath the conduit is drawn upwardly through the perforated bottom wall, into the absorbent material. Wicks leading from the interior fluid absorbent material extend through the flat bottom wall perforations and project outward to expand the area of absorbency by capillary action. Passageways between plural exterior walls transmit auxiliary fluids to warm the conduit to prevent freezing while, a plurality of the conduits may be assembled in a laterally juxtaposed manner to form a blanket.
摘要:
A tread capable of being used in all seasons and weather conditions comprising of a substantially centrally located rib which extends circumferentially about the tire, a plurality of independent projections placed about the remaining portion of the tire. The independent projections are placed so as to provide for two circumferentially extending grooves, one on either side of the central rib and a plurality of laterally extending grooves which extend from each central groove to the tread edge of the tire. The tread has a low net to gross ratio.
摘要:
An air-coupled current transformer is provided with a primary current conductor and two secondary coils connected such that the emf induced in each coil by an external disturbing magnetic flux is subtractive, whereas the emf induced by the current in the primary is additive. Two ferromagnetic core pieces enhance the rejection of the emf induced by the disturbing flux. Ceramic spacers are inserted into air gaps between the core pieces for maintaining the gaps fixed to keep the scale factor of the transformer independent of temperature.
摘要:
A biomedical electrode (10) adapted to be applied to a body and adapted to be electrically and mechanically connected to an electrical lead wire (14). The electrode (10) contains a protective, electrically insulative web 12) and an adhesive (16) adjacent one side of the web (12) which is adapted to be oriented to the body. A release liner (18) is placed between the web (12) next to adhesive (16) to facilitate removal and placement of an electrical lead wire (14). An electrically conductive film (22) is positioned adjacent the adhesive (16) opposite the release liner (18). Finally, another layer of adhesive (24) which is electrically conductive is positioned adjacent the electrically conductive film (22) opposite the layer (16of adhesive, which electrically conductive adhesive (24) is adapted to be applied to a body. Alternatively, the electrode (10) has a metallic coating (34) applied to the bottom side of a protective, electrically insulative web (32). A release line (18) separates the metallic coating (34) of the protective web (32) from an electrically conductive adhesive (24) which is adapted to be applied to a body.
摘要:
A biomedical electrode (10) adapted to be applied to a body, the biomedical electrode (10) having a surface area divided into a first zone (38), a second zone (40), and a third zone (42). The biomedical electrode (10) has a first layer of adhesive (24) which is electrically conductive and which is adapted to be applied to the body, a conductive layer (22) positioned adjacent the first layer of adhesive (24), a second layer of adhesive (16), and a protective, electrically insulative web (12) positioned adjacent the second layer of adhesive (16). The second layer of adhesive (16) holds the protective, electrically insulative web (12) to the conductive layer (22) in the third zone (42) of the biomedical electrode (10). A removable release liner (18) is positioned in the first zone (38) between the second layer of adhesive (16) and the conductive layer (22) preventing the protective, electrically insulative web (12) from sticking to the conductive layer (22) in the first zone (38) of the biomedical electrode (10). An insertable electrical lead wire (14) is insertable in the first zone (38) between the second layer of adhesive (16) and the conductive layer (22) upon removal of the removable liner (18). The protective, electrically insulative web (12) has an edge (44) in the second zone (40) which is easily grasped so that the protective, electrically insulative web (12) may be pulled and removed from the biomedical electrode (10) allowing removal of the electrical lead wire (14).
摘要:
A tread for a pneumatic tire having a plurality of circumferentially spaced independent projections, each projection has an outer configuration which is basically triangular as viewed in a plane perpendicular to the tread. The projections in the central portion of the tread are oriented such that the leading edges form an angle from about 30.degree. to 60.degree. with respect to the mid-circumferential plane of the tire, and the projections in the shoulder portions are oriented such that the leading edges form an angle from about 30.degree. to 70.degree. with respect to the mid-circumferential plane of the tire.