Gab Lever to Heater

The arm attached to the rock-shaft across the front of a beam engine, and to the pin of which the eccentric rod hook is connected.

The frame which supports the beam of a beam engine.

Material placed between flanges to make the joint tight.

A valve used in a line of pipe. It has two faces and seats slightly wedge-shaped, the plane of one face being perpendicular to the axis of the pipe.

An instrument for registering pressures.

(See Cock.)

An apparatus consisting of a small glass tube, the ends of which are held water-tight in metal connections, which, in turn, are secured to the boiler-shell, one above and the other below the water-line. A hole through all allows the water to stand at the same height in the boiler and tube. Literally the gauge glass is the glass tube only.

A term applied to boilers consisting of coils of pipe in which steam is generated.

A tapering piece of metal with a projection at each end to prevent the strap of a stub end connecting rod from spreading.

A form of brace used for supporting the top of the combustion chamber of a fire tube boiler.

The ring in a stuffing box by which the packing is compressed and held in place.

A valve, the chamber of which is globular, the valve proper being a disc whose plane is parallel with the line of pipe operated by a wheel and threaded stem, the valve seat being an opening in a web inside the chamber.

Mechanism for controlling automatically the speed of an engine.

Iron bars on which the fuel is supported while being burned in a furnace.

A ring formed of cotton-wicking, or similar material, put under the head of a bolt to prevent leakage when the bolt is in place.

A metal piece over a disc or flap valve to prevent it from leaving the seat too far.

A bar or plate on which the cross-head travels.

An alloy of about 85 parts of copper, 10 parts of tin, and 5 parts of zinc.

A plate sometimes used in the construction of a boiler. It stands edgeways between two flat or curved surfaces, is secured to both, and acts as a brace.

A bar bent to a V shape, with both ends flattened and turned up for feet, through which it is riveted to the interior of boiler-shell. It is used in connection with a fork-end brace. Also called crow-foot.

A small opening provided in a boiler-shell for cleaning and examining the interior. It is closed with a plate covering the hole from the inside.

(See Fires.)

An apparatus for heating the feed water for a boiler with the exhaust steam or other waste heat.