Expansion of the spot produced by a beam of electrons striking the face of a cathode-ray indicator, caused by maladjustment



Related Terms

TRIGGER

In a radar set, a sharp voltage pulse which is applied to the modulator tubes to fire the transmitter, applied simultaneously to the sweep generator to start the electron beam moving radially from the sweep origin to the edge of the face of the cathode-ray tube.

BRAGGSPECTROMETER

An instrument for x-ray analysis of crystal structure and measuring wavelengths of x-rays and gamma rays, in which a homogeneous beam of x-rays is directed on the known face of a crystal and the reflected beam is detected in a suitably placed ionization chamber. Also known as crystal spectrometer; crystal-diffraction spectrometer; ionization spectrometer.

DECK BEAM

An athwartship horizontal structural member supporting a flat or deck

BLOCK COEFFICIENT

The ratio of the underwater volume of a ship to the volume of a rectangular block with the same effective lengths, draft and beam

BREADTH

The width of a ship.

MOLDED_DEPTH

The vertical distance from the molded baseline to the top of the freeboard deck beam at side, measured at midlength of the ship

TRANSOM BEAM

The aftermost transverse deck beam

HATCH BEAM

Portable beam across a hatch to support hatch covers

TRIPPING BRACKET

Flat bars or plates fitted at various points on deck girders, stiffeners, or beams as reinforcements to prevent their free flanges from tripping

MOLDED BEAM

The maximum breadth of a hull measured between the inboard surfaces of the side shell plating of flush-plated ships

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