Land plane to Latent het
con light, other than an airport beacon or an airway beacon, that serves to indicate a definite geographical location.
Landplane. (Aero.) An airplane which can rise from or alight on land only.
Landscape panel. (Furn.) A panel with a horizontal grain.
Language. A set of signs and symbol. With rules for using them, that can be used to communicate with other
people, animals, or machines like. computers.
Lap. (Mach.) An accurately finished tool having its surface charged with an abrasive substance.
Lap dovetail. (Woodwk.) A dovetail joint in which the dovetail tenons are shorter than the thickness of the piece containing the mortises; used in drawer construction to avoid having the joint show on the face of the drawer.
Lap joint. (Woodwk.) A joint produced by the overlapping of contiguous faces of wood or metal, etc.
Lapping. (Mach.) The finishing or external or internal surfaces either by hand or by machine. (Wood. Fin.) The blemishes in a painted or varnished surface caused by an overlapping of brush strokes.
Lap-riveted joint. A joint formed when the two edges of plates to be joined are overlapped and fastened by one or more rows of rivets.
Lap-seam welding. A seam-welding process in which the parts to be welded are overlapped.
Lap weld. A weld made on the thinned down, ovrelapped edges of plates, maintaining an fwen thickness of material.
Larch. (Wood) A medium-size, conebearing, deciduous tree. Wood is heavy, hard, and strong, white to red. Used for telephone poles,
fence posts, and in shipbuilding.
Lard oil. (Mach.) An oil produced from animal fats. This oil is an efficient lubricant for use on metalcutting tools.
Large knot. (Wood) A sound knot
more than 1 Y2 inches in diameter.
Larry. (Plaster.) A tool with a curved steel blade provided with a handle about 7 or 8 ft. long. It is used for mixing in the hair with the coarse stuff. .
Larynx-tone. Basic speech or singing tone generated by vocal folds in larynx.
Laser vision or laser disc. A videodisc system developed by Philops: a reflective disc is read by a laser, as with Compact Disc but the signals on a videodisc are analogue, not digital, as on a
Last. A foot-shaped wooden form on which shoes are made. .
LaStic. (Chern. Plast.) A substance which at a certain temperature exhibits . the physical properties of rubber.
Latching. Condition when clipping invokes a sit-point voltage prolonged by various time constants, thus introducing distortion.
Latent het. That heat which changes the physical state of a substance
without changing its temperature, . e.g., heat required to melt ice at 32
Laleral to Laundry chute
deg. F to steam at 2] 2 deg. F.
Lateral. Relating to the side, or cross
wise of the length.
Lateral motion. Motion in a sidewise direction.
Laterals. (Engin.) Diagonal braces between two members to. increase rigidity.
Lateral stability. (Aero.) Stability with reference to disturbances involving rolling, yawing, or side slipping, i. e., disturbances in which the position of the plane of symmetry of the aircraft is affected.
Lateral strain. (Engin.) A strain which bears against the side of a structure; a transverse strain.
Lateral ~rust. (Masonry) The pressure of a load which extends to the sides.
Latex. (Papermkg.) A liquid rubber substance employed for strengthening paper.
Lath. (Arch. and Masonry) A strip of wood, usually about I Y2 in. wide, 3/ 8 in. thick. and 4 ft. long, used as a foundation for plaster.
Lathe. (Mach.) A machine used for the production of circular work.
Lathe bed. (Mach.) The longitudinal supports for the headstock, tailstock,and the slide rest of a lathe.
Lathe center grinder. (Mach.) Grinding device which can be attached to a lathe and used for grinding centers.
Lathe chuck. (Mach.) Form of holding device, attached to spindles of lathes, which grips the work while it is being operated on.
Lathe dog; (Mach.) A carrier; i.e., an attachment which may be fastened to lathe work, and has a projecting tail to engage in a slot or hole in the faceplate.
Lathe, engine. (Mach.) The ordinary form of lathe with lead screw, power feed, etc.
Lathe, gap. (Mach.) A lathe with a gap or cutout in front of the headstock to increase the swing for faceplate work
Lathe shears. (Mach.) The machine top of the lathe bed. Lathe tool. (Mach.) Also called "cut ting tool." Used for removing ex
cess stock from metal worked in a lathe. The commonly used lathe tools are: side tool, "diamond point, bullnose, inside boring, threading,
cutting off. Usually:made of high:. speed or carbon steel, and ground with wet emery grinder. .
Lathe work. (Wood and Metalwork) The work commonly done in the lathe which practically includes almost all branches of turning and boring.
Lahteing. (Arch.) The nailing of laths in position. The material. itself.
Latitude. Distance north or south from the equator measured on the earth's surface.
Lattice. (Arch.) Operi work formed by crossing or interlacing laths or other thin strips. .
Lattice girder. (Arch.) A truss madeup of parallel top and bottom chords with lattice bracing.
Lattice-work. Work of wood or metal made of lattices.
Laundry chute. (Arch.) An enclosed chute or drop from upper floor to
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