Hollow metal

Lever and Shaft Mechanisms In pressurized vessels, float-actuated lever and shaft mechanisms are frequently used for level measurement. This type of mechanism consists of a hollow metal float and lever attached to a rotaiy shaft, which transmits the float motion to the outside of the vessel through a rotary seal. 

In many materials, the inherent flaws are easily recognized. Brittle polycrystalline materials, for example, contain microcracks, voids, and other imperfections that can be identified in micrographs, and are expected to provide sites for internal fracture activation. Artificial flaws introduced into a hollow metal shell by uniform scoring can be expected, under rapid expansion, to fracture the shell along the paths of scoring. 

Ogive, Rifle Grenade. A hollow metallic item designed for attachment to the forward end of a practice rifle grenade. It cushions the impact and permits reuse of the grenade Ref OrdTechTerm (1962), 208-R... 

Liu, J., Maaroof, A.I., Wieczorek, L. and Cortie, M.B. (2005) Fabrication of hollow metal nanocaps and their red-shifted optical absorption spectra. Advanced Matenals, 17, 1276-1281. 

A solid or hollow metal pole used in the assembly or vulcanising of rubber products, e.g., the assembly of hand-built hose. 

The blast resistance of conventional doors is generally limited by the rebound capacity in the unseating direction. A conventional unreinforced hollow metal door with a cylindrical latch may be adequate to withstand a rebound force of 50 psf (2.4 kPa). Door with a mortised latch may be adequate for a rebound force of 100 psf (4.8 kPa). If the blast pressure exceeds this, other alternatives may be considered. These include placing interior or externa barrier walls, or installation of blast resistant doors and frames. Unlike conventional doors, blast doors are typically provided as a complete assembly including the door, frame, hardware and accessories. This is because all the components are dependent on each other to provide the overall blast resistance. Refer to Chapter 9 for performance requirements and design details for blast resistant doors. 

The primary attribute for the security of a door is its strength. Many security doors are 4-20 gauge hollow metal doors consisting of steel plates over a hollow cavity reinforced with steel stiffeners to give the door extra stiffness and rigidity. This increases resistance to blunt force used to try to penetrate through the door. The space between the stiffeners may be filled with specialized materials to provide fire, blast, or bullet resistance to the door. 

Shell. 1) A hollow metal projectile designed to be projected from a gun. It can contain an explosive, chemical, atomic or other charge. The term projectile is preferred for that kind of shell 2) A cartridge for artillery or small aims or a shotgun shell. The term cartridge is preferred for this kind of shell (Ref 40a,... 

Sudden and explosive expansion of air occluded in blow-holes of castings and that trapped in tubes, closed piping, or hollow metal work when immersed in molten baths without pre-warming... 

Gun-pl ow. French Fancher of NY State Patented in 1862 (Ref 1), a plow, the hollow metal beam of which could alternate as a tongue to which was hitched a team or a gun to fire a ball or grape ammo at marauders (Ref 2)... 

Gravure printing separates printing from nonprinting areas by an engraved pattern that is chemically etched or mechanically cut into a surface of a hollow metal... 

Bulk density. Fill with dry DADNPh a special, accurately tared (W ), hollow metallic cylinder of 1-cc capacity. To achieve this, hold the cylinder in a vertical position with open end up and pour the material f rom a folded piece of glazed paper held at the mouth of the cylinder. Remove the surplus of material from the top and after leveling... 

A typical flaker , such as used in manuf of TNT and some other HE s consists of a horizontal, hollow, metallic (usually cast-iron), water-c ooled, drum, with hollow truoions mounted in bearings. It is given in Perry, pll64-L as Fig 68 and reproduced here as Fig 6. The lower part of drum dips into molten material located in a hollow, steam-... 

The setup for ESR spectroscopy is a cross between NMR and micro-wave techniques (Section 5.8). The source is a frequency-stabilized klystron, whose frequency is measured as in microwave spectroscopy. The microwave radiation is transmitted down a waveguide to a resonant cavity (a hollow metal enclosure), which contains the sample. The cavity is between the poles of an electromagnet, whose field is varied until resonance is achieved. Absorption of microwave power at resonance is observed using the same kind of crystal detector as in microwave spectroscopy. Sensitivity is enhanced, as in microwave spectroscopy, by the use of modulation The magnetic field applied to the sample is modulated at, say, 100 kHz, thus producing a 100-kHz signal at the crystal when an absorption is reached. The spectrum is recorded on chart paper. 

Kim, K., et al. 2004. A tapered hollow metallic microneedle array using backside exposure of SU-8. J Micromech Microeng 14 597. 

Their poison stayed shut in. traffic had been playing something German from Mr Hyde. Hollow, metallic, funky. Billy wanted to put on Sasha and Digweed. An argument reignited by the time she was... 

The vacuum-tube diode, invented by Fleming24 in 1904 [2,3], works because of the relative geometrical shapes of the two concentric electrodes, the cathode and the anode. It consists of a cylindrical glass enclosure that is partially evacuated, bonded, and sealed to a metal base. It contains an inner metallic thin-wire "cathode" (negative electrode, consisting of W, oxide-covered W, or a Th-W alloy), placed along the cylinder axis. This cathode is electrically heated to 900 K or above, using an auxiliary filament circuit, typically driven by a 6.3-V power supply, to foster thermoionic emission of electrons from the cathode. This cathode is cylindrically surrounded by a metallic outer electrode, the anode or "positive electrode" or "plate," which is a hollow metallic cylinder, whose axis coincides with that of the cathode. The... 

A spherical capacitor consists of an inner metal sphere of radius ra supported on an insulating stand at the center of a hollow metal sphere of inner radius rb. There is a charge +Q on the inner sphere and a charge -Q on the outer. 

In the case of a hollow metallic resonator as an example for a so-called closed cavity, a discrete set of eigenmodes exists related to a discrete spectrum of eigenmode energies.This is due to the boimdary conditions for the electric and magnetic field that lead to a complete suppression of wave propagation outside the resonator. Hence, no energy is radiated from the hollow resonator the whole radiation field is restricted inside the metallic cavity. 

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