Olive to Order
Olive Open mold
device that depends on the flow of oil through an orifice for its shockabsorbing effect in a landing gear.
Olive. (Wood) A slowgrowing, closegrained, heavy wood, light yellowish brown with dark brown spots 3:nd streaks. Much used for novelties.
Omega. The last letter of the Greek
alphabet. Omnigraph. An automatic acetylene cutter. A mechanical pointer traces the pattern which is attached to. the machine thus controlling the motion of the cutter tip. By this method several duplicate plates can be cut simultaneously.
One-side coated. (Paperrnkg.) A litho paper or a blank which has a coating only on one side.
Onion Coot. (Furn.) A bulbous foot of oval shape.
Onion-skin. (Paper) A very thin pa per used for duplicating on a type ,. write.
Onlay. (Furn.) Ornament laid on surface woods.
Onyx. (Chern.) A form of chalcedony; a variety of quartz consisting of layers of different colours, usually in even planes.
Ooze. (Verb.) To discharge or leak out gradually. (Noun) Mud, miry earth.
Ooze leather. Denotes a kind of finish or finishing process. The soft velvety finish given to the flesh side of calfskin, sheepskin, or goatskin.
Opacimeter. An instrument for mea suring the opacity of paper.
Opacity. (Papermkg. and Print.) The degree of nontransparency of a paper.
Opaque. Imprevious to light; not translucent. Opaquing. Making something opaque. (Photog.) The application of any opaque substance over parts of a negative to eliminate those parts from the finished print. SEE BLOCKING OUT.
Open bubble. (Plast.) Bubble which has partly broken through the surface of a plastic.
Open circuit. (Elec.) A circuit which is not electrically complete and in which there is no current.
Open-circuit cell. (Elec.) Cells normally kept on open circuit for intermittent work. They exhaust quickly on closed circuit, but recover when the circuit is opened.
Open cycle engine. (Aero.) Ordinary gas-turbine engine in which air is drawn in, heated by the combustion of fuel, and discharged together with the combustion products.
Open hearth. Refers to steelmaking furnaces built on the reverberatory type, being termed open hearth furnaces, and their method of manufacture open-hearth processes.
Open matter. (Print.) Widely spaced lines of type.
Open mold. (Fdry.) Used in casting bars, plates, and larged flat work without the use of a flask. An absolutely level bed of sand is built Opell punetuot;oll to Order up and the pattern placed on it and rammed up. When the pattern is removed the mold is ready to pour.
Open punctuation. (Print.) Refers to the sparing use of punctuation marks.
Open shop. An establishment in which both union and nonunion workmen may be employed, as opposed to the closed shop which employs only members of tradeunions.
Open-sidfe planer. (Mach.) Not in common use. It has only one upright housing to carry the arm. With this type of machine it is possible to machine work which is wider than the bed of the planer.
Open string stairs. (Arch. and Bldg.) A stair having a wall on one side and a balustrade or handrail on the other. The stair is so constructed that the treads and risers are visible from the side.
Open washer. (Mach.) Also called "slip washer." A washer partly cut away so that it may be slipped around a bolt without entirely removing the nut.
Open wiring. (Elec.) Exposed electrical conductors mounted on porcelain knobs or cleats.
Open-work. (Furn.) Any form of decoration that ,pierces or cuts through the surface leaving open spaces.
Operating speed. (Aero.) The speed in level flight corresponding to 87.5 per cent of the rated speed of the engine.
Operator. (Mach.) One who manipulates a machine or controls the working thereof.
Opposite. Facing; set over against; contrary; diametrically different.
Optical centre. (Print.) That point on a page of printed matter or drawing which the eyes seem to seek as the centre; it is about one eighth of the total height above the actual center.
Optical distortion. (Plast.) An apparent distortion of anything viewed through a transparent plastic, caused by the nonuniform optical character of the plastic and not by its shape.
Optical pyrometer. A device used for measuring high temperature by the comparison of the colour brought about by intense heat, with the colour of a wire heated to a known temperature by means of an electric current.
Orange peel. (Paint and Lacquer) A pebble effect in spray coats of paint or Illcquer, similar to the peel of an orange, caused by too much air pressure, holding the gun too close to the surface, spraying lacquer that is cooler than the room temperature, or using a too-quickdrying thinner, which prevents the proper flow of the solids.
Optical pyrometer. A device used for measuring high temperature by the comparison of the colour brought about by intense heat, with the colour of a wire heated to a known temperature by means of an electric current.
Order. (Arch.) The general style of a
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