A crusher with one fixed jaw plate and one pivoted at the top so as to give the greatest movement on the smallest lump.



Related Terms

FRANKLIN CONTINUOUS RADAR PLOT TECHNIQUE

A method of providing continuous correlation of a small fixed radar-conspicuous object with own ship's position and movement relative to a planned track.

ABRID

A plate reinforcing the top of a drilled hole that accepts a pintle.

VANE

A fixed or adjustable plate inserted in a gas or air stream used to change the direction of flow.

FLOOD CURRENT

The movement of a tidal current toward the shore or up a tidal river or estuary. In the mixed type of reversing current, the terms greater flood and lesser flood are applied respectively to the flood currents of greater and lesser speed of each day. The terms maximum flood and minimum flood are applied to the maximum and minimum speeds of a flood current, the speed of which alternately increases and decreases without coming to a slack or reversing. The expression maximum flood is also applicable to any flood current at the time of greatest velocity. The opposite is EBB CURRENT.

BILGE BRACKET

A vertical transverse flat plate welded to the tank top or margin plate and to the frame in the area of the bilge.

TRUE MOTION DISPLAY

A type of radarscope display in which own ship and other moving targets move on the plan position indicator in accordance with their true courses and speeds. All fixed targets appear as stationary echoes. However, uncompensated set and drift of own ship may result in some movement of the echoes of stationary targets. This display is similar to a navigational (geographical) plot.

BOILER HEADER (BOX)

A pressure part of the boiler consisting of a flat tube sheet into which the ends of the water tubes are rolled. In a parallel plane is a tube cap or handhole sheet. The two sheets are spaced about 4 to 8 in. or more apart. The top and bottom and both ends are flanged together and riveted or may be closed by a narrow flanged strip of plate riveted to each sheet. Circulating nipples connect the top of the header and drum, or the header may be flanged and riveted directly to the drum. Welding would be used today instead of rivets.

ORIFICE DISCHARGE COEFFICIENT (Cd)

The ratio of the actual flow through an orifice to that of the theoretical or isentropic flow through an orifice. Basically this parameter is a measure of the orifice efficiency. Valves are dimensionless and range from 0.61 for a thin-plate orifice to 0.85 for thick plate square-edged orifices, and up top 0.90

EBB CURRENT

The movement of a tidal current away from shore or down a tidal river or estuary. In the mixed type of reversing tidal current, the terms greater ebb and lesser ebb are applied respectively to the ebb tidal currents of greater and lesser speed of each day. The terms maximum ebb and minimum ebb are applied to the maximum and minimum speeds of a current running continuously. The expression maximum ebb is also applicable to any ebb current at the time of greatest speed

FREEBOARD DEPTH

(D): The moulded depth measured amidships, from the top of the keel to the top of the freeboard deck beams at side, plus the thickness of the stringer plate if no wooden deck is fitted. If a wooden deck is fitte

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