摘要:
A liquid-crystalline polymer composition comprising a ferroelectric liquid-crystalline polymer and a low molecular weight liquid-crystalline compound which exhibits smectic C phase or chiral smectic C phase. Such liquid-crystalline polymer compositions have not only excellent moldabilities such as ease of orientation, but also exhibit chiral smectic C phase at wide temperature range within room temperatures and exhibit high speed response to changes of external fields and high contrast ratios when they are used for optical display elements.
摘要:
A uniform orientation can be brought about to the liquid crystal material enclosed in a liquid crystal device by applying a shearing force to the liquid crystal material while an electric field is being applied to the liquid crystal material, without requiring disposition of orientation layers nor accurate control of temperature. The orientation method can be efficiently conducted by an apparatus comprising a supply roll for supplying and conveying the liquid crystal device, a roller having conductive orientation rolls for bending the conveyed liquid crystal device and for applying an electric field to the liquid crystal material, a power source for applying a voltage to the conductive orientation roll, and a receiving means for receiving the liquid crystal device which has gone through the bending.
摘要:
A wireless detonator is disclosed that includes an antenna for receiving microwaves, a detonator provided with a heating element, and a transmission circuit. The heating element in the detonator is heated by the energy of the microwaves. The transmission circuit transmits the microwave energy from the antenna directly to the heating element. The antenna has a relative gain of 0 to 20 dB in the frequency band of the microwaves. The absolute value of the reactance component in the radiation impedance of the antenna is at most 50% of the pure resistance component of that impedance. The absolute value of the reactance component in the impedance of the heating element is at most 50% of the pure resistance component of that impedance. The pure resistance components of the radiation impedance of the antenna and of the impedance of the heating element are in a range of 70 to 130% of the characteristic impedance of the transmission circuit.
摘要:
Disclosed herein is an improved method for measurement of serotonin uptake sites in a sample, in which a radioligand is incubated with a sample and then the radioactivity of the radioligand bound to the sample is determined, wherein the improvement comprises using tritium-labeled 6-nitro-2-N-piperazinylquinoline or an acid addition salt thereof as the radioligand.
摘要:
A ferroelectric liquid crystal polymer comprising the recurring units represented by the following general formula: ##STR1## in which k is an integer of from 1 to 30,R.sub.1 is ##STR2## R.sub.2 is --COOR.sub.3, --OCOR.sub.3, --OR.sub.3, or --R.sub.3, in whichR.sub.3 is ##STR3## R.sub.4 is --CH.sub.3 or Cl, m is 0 or an integar of from 1 to 10,n is 0 or an integar of from 1 to 10, providing that n is not 0, when R.sub.4 is --CH.sub.3.The ferroelectric liquid crystal polymer of the present invention not only exhibits a ferroelectricity even at temperatures in the vicinity of a room temperature, but also has so fast response speed to the external factors as to be able to display motion pictures, and may be advantageously used as display elements for large size screens and a curved screens.
摘要:
A solenoid actuated valve device for controlling the flow of fluid comprising a body having an inlet port, a first outlet port, a second outlet port, and a bore for fluid communication with the inlet and first outlet ports at one end thereof and for fluid communication with the second outlet port at the other end thereof. A magnetic hollow tubular core is axially mounted within the bore for dividing the bore into an annular outer chamber, a first inner chamber and a second inner chamber communicating among the inlet port, first outlet port and second outlet port, respectively, and the core has first and second apertures for fluid communication between the outer chamber and first and second inner chambers, respectively. A non-magnetic bobbin, having a valve and at least two radially outwardly extending and circumferentially spacing projections, is slidably mounted on an outer periphery of the core to control the effective open areas of the first and second apertures, the projections defining a first series of fluid passages therebetween for decreasing the dynamic fluid pressure axially acting thereon. Springs are seated at one end thereof against the projections of the bobbin for biasing the bobbin to a position wherein the valve closes the first aperture and opens the second aperture. A solenoid coil is wound on said bobbin, and permanent magnets are secured in the body so that the magnetic flux thereof intersects the winding of the solenoid coil at right angles thereto. An electromagnet defines a magnetic circuit with the core and the permanent magnets to provide a magnetic force causing the bobbin to move axially against the springs when electric current passes through the solenoid coil.
摘要:
A fiber-reinforced resin coil spring impregnated with thermosetting resin which comprises a resin-impregnated and twisted rod-shaped fiber bundle formed by bundling a plurality of fiber wire blanks made of glass or carbon, immersing the fiber bundle and twisting the rod-shaped fiber bundle in a thermosetting resin, and forming coiled twisted rod-shaped fiber bundle from the resin-immersed and twisted rod-shaped fiber bundle. Thus, the resin coil spring incorporates large elastic energy and high load withstanding capability due to the twisting of the fiber bundle.
摘要:
An improved cork-extracting device having a gas bomb filled with carbonic acid gas, inert gas or the like. The gas in the bomb is fed into the air-space present below the cork of the container, such as a bottle containing beverages such as wine, through a insertion needle whereby the pressure in the container raises to remove the cork automatically. The cork-extracting device is characterized in that a valve seat of a needle valve, which opens and closes the gas supply port, is made of a resilient valve seat plate, the lower surface of the resilient valve seat plate being used as a packing for supporting the cap of the gas bomb, accommodated in a cylindrical container, and the needle valve being able to protrude the resilient valve seat plate to open the cap of the gas bomb.
摘要:
The solenoid actuated valve device is comprised of a substantially cylindrical housing of magnetic material having a hollow tubular core of magnetic material disposed coaxially therein. The ends of the housing are sealingly closed by end walls of magnetic material and the housing is provided with a radially disposed inlet port and an axially disposed outlet port in communication with the central chamber of the tubular core. An annular bobbin having a solenoid coil thereon is slidably mounted on the tubular core for opening and closing the radially disposed openings through the core. A pair of springs extending between the end of the housing and the bobbin normally bias the bobbin into closing position relative to said openings with each spring being connected to one end of the coil and an electric terminal, respectively. At least two permanent magnets are mounted in the housing radially outwardly of the solenoid coils so that the lines of flux of the permanent magnets intersect the coil at right angles thereto. Axially extending passages are provided adjacent the permanent magnets to prevent the buildup of air pressure at opposite ends of the permanent magnets which might adversely affect the accurate control of the movements of the bobbin. The hollow core is divided into two chambers by a partition with one of the chambers being in communication with the outlet port and the other chamber being in communication with the air space in which the two springs are located.
摘要:
A pressure control valve assembly comprising a rubber diaphragm to which is applied the negative pressure of the engine intake manifold and the exhaust gas pressure of the engine exhaust manifold. The diaphragm of the present invention is formed with a gradual descent sloping down from a valve-actuating central portion to an outer periphery. Adjacent to one portion of the outer periphery of the diaphragm a port opening to the outside of the valve assembly is provided. Thus, any gas ingredients such as condensed water can be expelled along the descent of the diaphragm via the port without gathering on the diaphragm surface which will therefore be free from objectionable oxidation or corrosion.