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The rig consisted of two construction cranes and a hydraulically operated device to tilt and position a model, along with 200 ft (61 m) of cables. Parker's rig allowed actors to sit inside full-scale models suspended 50 ft (15 m) above the ground, yet provide safety and realism for staged flying sequences, with the sky realistically in the ...
In some devices, a mechanical absorber or reflector is added between the IDTs and the edges of the substrate to prevent interference patterns or reduce insertion losses, respectively. The acoustic wave travels across the surface of the device substrate to the other interdigitated transducer, converting the wave back into an electric signal by ...
A hand-held circular saw is the most conventional circular saw. This miter saw is a circular saw mounted to swing to crosscut wood at an angle. A table saw. Tractor-driven circular saw. A circular saw or a buzz saw, is a power-saw using a toothed or abrasive disc or blade to cut different materials using a rotary motion spinning around an arbor.
Interdigital transducer. Schematic picture of a typical SAW signal processing device containing two interdigital transducers. An interdigital transducer (IDT) is a device that consists of two interlocking comb-shaped arrays of metallic electrodes (in the fashion of a zipper). These metallic electrodes are deposited on the surface of a ...
A radial arm saw is a cutting machine consisting of a circular saw mounted on a sliding horizontal arm. Invented by Raymond DeWalt in 1922, the radial arm saw was the primary tool used for cutting long pieces of stock to length until the introduction of the power miter saw in the 1970s. In addition to making length cuts, a radial arm saw may be ...
Surface acoustic wave. A surface acoustic wave ( SAW) is an acoustic wave traveling along the surface of a material exhibiting elasticity, with an amplitude that typically decays exponentially with depth into the material, such that they are confined to a depth of about one wavelength. [2] [3]
Reciprocating saws have many uses; here, one is shown cutting through hard-to-remove nails in a staircase. A reciprocating saw is a type of handheld, small, machine-powered saw, in which the cutting action is achieved through a push-and-pull ("reciprocating") or back-and-forth motion of the blade. The original trade name, Sawzall, is often used ...
Sawfiler. A saw filer is a person who maintains and repairs saws in a saw mill. A saw filer's work area in the mill is called the filing room . Saws used in timber mills are very large. They need maintenance for safe operation. Repair of damaged saws requires a degree of skill. Automated equipment has continued to be developed and implemented ...