摘要:
A clutch for a motor driven antenna according to the present invention includes a driving member rotated by a driving motor, a driven member for transmitting a rotating force of the driving member to an antenna element, and a clutch element for frictionally transmitting the rotating force of the driving member to the driven member. The clutch element includes recesses formed on a rotating track of one of opposing sides of the driving member and driven member, projections formed on a rotating track of the other side so as to be fitted into the recesses when the driving member and the driven member are rotated relative to each other, and anti-slip members protruded near the recesses such that a sliding frictional force caused at the tip end contact portions of the projections exceeds a maximum load of the antenna element including the driven member when the antenna element is extended or retracted.
摘要:
A first embodiment of a floating mount apparatus for a coaxial connector includes a coaxial connector with a central axis having a first external diameter region, a second external diameter region adjacent to the first external diameter and a third external diameter region adjacent to the second external diameter. The second external diameter region is smaller than the first external diameter region. A mount member, i.e., a receiving aperture, includes a first internal diameter region, a second internal diameter region and a third internal diameter region adapted to receive the coaxial connector, a clearance existing between the region of the first external diameter and the first internal diameter. The second internal diameter region is less than the first internal diameter region of the mount member and the third external diameter region of the coaxial connector. A spring having a near cylindrical-shape is inserted between the second internal diameter region of the mount member and the second external diameter region of the coaxial connector to bias the coaxial connector.
摘要:
A rod-shaped vehicle antenna according to the present invention, includes a rod-shaped antenna element having small- and large-diameter portions arranged alternately at regular pitches along the longitudinal direction of a rod-shaped conductor. When the outside diameter of each of the small-diameter portions is D1, that of each of the large-diameter portions is D2, and the pitch (length of each of the small- and large-diameter portions) is P, P is set within the following range:(D2.times.6).ltoreq.P.ltoreq.(D2.times.7). The ratioof D1 to D2, that is, D1/D2 is set within the following range:0.7.ltoreq.(D1/D2).ltoreq.0.85.
摘要:
An optically active compound derived from a novel trifluorolactic acid, useful as a component of a ferroelectric liquid crystal composition, and a liquid crystal composition. A compound represented by general formula (I), wherein R.sup.1 represents C.sub.1 to C.sub.18 alkyl, alkoxy, C.sub.2 to C.sub.18 alkanoyl, alkanoyloxy or alkoxycarbonyl; R.sup.2 represents optionally alkoxy-substituted alkyl (where the total number of the carbon atoms is 1 to 15); A, B and C represent each independently the group (a) or (b); v and w represent each independently --COO--, --OCO--, --CH.sub.2 O--, --OCH.sub.2 --, --CH.sub.2 --CH.sub.2 --, --CH.dbd.CH--, --C.dbd.C-- or a single bond; and x and y together represent any of the following combinations: --COO-- and --COO--; --COO-- and --CO--; --COO-- and --CH.sub.2 O--; --COO-- and --CH.sub.2 OCO--; --COO-- and --CH.sub.2 OCOO--; --O-- and --CH.sub.2 O--; --O-- and --CH.sub.2 OCO--; and --O-- and --CH.sub.2 OCOO--.
摘要:
A cassette type magnetic recording and reproducing device comprises a housing, a cassette receiving portion provided therein, at least one magnetic head and pinch roller provided at least at the same position in the cassette receiving portion, a first pair of drive shafts for a small tape cassette provided in the cassette receiving portion, and a second pair of drive shafts for a large tape cassette provided in the same cassette receiving portion.
摘要:
Provided is an element structure whereby it is possible to produce a silicon-germanium light-emitting element enclosing an injected carrier within a light-emitting region. Also provided is a method of manufacturing the structure. Between the light-emitting region and an electrode there is produced a narrow passage for the carrier, specifically, a one-dimensional or two-dimensional quantum confinement region. A band gap opens up in this section due to the quantum confinement, thereby forming an energy barrier for both electrons and positive holes, and affording an effect analogous to a double hetero structure in an ordinary Group III-V semiconductor laser. Because no chemical elements other than those used in ordinary silicon processes are employed, the element can be manufactured inexpensively, simply by controlling the shape of the element.
摘要:
Provided is a semiconductor element having, while maintaining the same integratability as a conventional MOSFET, excellent switch characteristics compared with the MOSFET, that is, having the S-value less than 60 mV/order at room temperature. Combining the MOSFET and a tunnel bipolar transistor having a tunnel junction configures a semiconductor element that shows an abrupt change in the drain current with respect to a change in the gate voltage (an S-value of less than 60 mV/order) even at a low voltage.
摘要:
To provide a light-emitting element where electrons are efficiently injected into a Ge light emission layer and light can be efficiently emitted, the light-emitting element has a barrier layer 3 which is formed on an insulating film 2, worked in a size in which quantum confinement effect manifests and made of monocrystalline Si, a p-type diffused layer electrode 5 and an n-type diffused layer electrode 6 respectively provided at both ends of the barrier layer 3, and a monocrystalline Ge light emission part 13 provided on the barrier layer 3 between the electrodes 5, 6. At least a part of current that flows between the electrodes 5, 6 flows in the barrier layer 3 in a horizontal direction with respect to a substrate 1.
摘要:
Disclosed is an exhaust purification device for an internal combustion engine provided with a venturi-shaped mixing chamber (13) upstream of a NOx catalyst (16), said mixing chamber (13) formed continuously from a tapering part (13a) along which the radius decreases in the downstream direction, a waist part (13b) at which the radius is at smallest, and a widening part (13c) along which the radius increases in the downstream direction. A vane plate (18) and an aqueous urea solution spray nozzle (19) are arranged inside the tapering part (13a). The ratio (a/b) of the distance (a) between the vane plate (18) and the center of the waist part (13b) and the distance (b) between the center of the waist part (13b) and the mouth of the NOx catalyst (16) is set between 0.5 and 1.0.
摘要:
An object of the present invention is to provide a germanium laser diode that can be easily formed on a substrate such as silicon by using a normal silicon process and can emit light efficiently. A germanium light-emitting device according to the present invention is a germanium laser diode characterized in that tensile strain is applied to single-crystal germanium serving as a light-emitting layer to be of a direct transition type, a thin semiconductor layer made of silicon, germanium or silicon-germanium is connected adjacently to both ends of the germanium light-emitting layer, the thin semiconductor layer has a certain degree of thickness capable of preventing the occurrence of quantum confinement effect, another end of the thin semiconductor layer is connected to a thick electrode doped with impurities at a high concentration, the electrode is doped to a p type and an n type, a waveguide is formed so as not to be in direct contact with the electrode, and a mirror is formed at an end of the waveguide.