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Motor - A hoist is a device used for lifting or lowering a load by means of a drum or barrel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use ch. Used . ain, fiber or wire rope as its lifting medium.

A hoist normally is used for lifting (near vertical) and a winch is normally used for pulling (near horizontal). . Used .

Memory Consoles - Memory-based consoles have become very popular in almost all larger installations, particularly theatres. These new types of controls have completely replaced preset consoles as controllers of choice. Used . . Memory consoles are preferable in productions where scenes do not change from show to show, such as a theatre production, because scenes are designed and digitally recorded, so there is les. Used . s room for human error, and less manpower is required to produce the same result.

Memory consoles have a bank of faders called 'submasters.' These submasters can be programmed to control a single

Conventional - Conventional lighting is made up of stationary lights that can be moved, but only via manual means of adjusting, or focusing the fixture with a yoke. However, some aspects of the lights, like brightne. Used . ss and color may be controlled remotely
by consoles or analog audio inputs. There are many different conventional lights used in stage lighting design including floodlights, pars, foll. Used . owspots, ellipsoidals, fresnels, strips and cycs. ...

Subs - A sub or subwoofer is a speaker dedicated to the reproduction of bass frequencies, usually from about 20 Hz to about 200 Hz. . Used . . Used . ...

Lens - A lens is a device for either concentrating or diverging light, usually formed from a piece of shaped glass. Analogous devices used with other types of electromagnetic radiation are also called lense. Used . s: for instance, a microwave lens can be made from paraffin wax.

The earliest records of lenses date to Ancient Greece, with Aristophanes' play The Clouds (424 BC) mentioning a b. Used . urning-glass (a convex lens used to focus the sun's rays to produce fire). The writings of Pliny the Elder (23-79) also show that burning-glasses were known to the Roman Empire, and mentions what is possibly t