S to Salon

S to Safe carrying capacity

S. Symbol for distance, special entropy
S. Symbols for siemens, area, entropy, pointing vector
Saddle. (Ceram.) Rod made of fire clay, used for supporting glazed ware during firing. (Mach.) The base of a slide rest which lies on the lathe bed; also the sliding plate which carries the drill spindle and gear wheels of a radial drill; or, the crossbar which carries the tool head on a planer or boring mill.
Saddle stitch. (Print) A method of fastening the'sheets of a pamphlet together by stitching through the middle fold, either with thread of wire, to allow the pamphfet to be opened flat. Sad-iron. Solid flat iron.
S.A.E. (Auto.) The Society of Auto­ motive Engineers' standard for­mula for computing horsepower of gasoline engines may be stated as follows based on 1.000 feet per minute piston speed. D is the cylinder bore in inches, N the number of cylin­ders, and 2.5 a constant. S.A.E. or Society of Automotive Engineers. These initials, pre­ h.p.fixed to the name of any mechani­cal part, indicate that the article is built in accordance with the standards laid down by this society.
S.A.E. steels. A numerical system has been adopted by the Society of Automotive Engineers to designate the steels included in S.A.E. speci­fications. The first figure of the number indicates the general class to which the steel belongs; e.g., (1) indicates carbon steel; (2) nickel steel; (3) nickel chromium. etc. The second figure usually in­dicates (in cases of alloys) the percentages of the main alloying element. The last two or three fig­ures indicate the carbon content in hundredths of I per cent. Thus, specification 2345 calls for a nickel steel having 3 per cent nickel and 0.45 per cent carbon.
S.A.E. threads. (Auto. Mech.) Of the same form as U.S. Standard, but of finer pitch now known as Nat' Fine Series.
Safe carrying capacity. (Bldg.) Any­ thing so constructed as to carry a certain weight without a break­down. (Elec.) The National Board of Fire Underwriters established a table of safe carrying capacities for all sizes of copper wire. This safe carrying capacity, in amperes,

Safe edge to Salonmay not be exceeded when in­stalling electrical conductors.
Safe edge. (Shopwk.) The uncut edge of a file which makes possible the protection of an adjacent surface when operating in a comer. Safeguard. Something that serves as a protection or defense or that ensure safety.
Safe load. (Engin.) The load that a piece can support without exceed­ing the working unit stress.
Safety beli. A belt strap worn as a safety precaution by persons working at great height.
Safety factors. (Engin.) The allow­ance made for overloads and un­foreseen circumstances in order to insure ample strength in a ma­chine, material, or type of con­struction under all conditions.
Safety lamp. (Min.) An incandes­ cent lamp used by miners.
Safety paper. (Paperrnkg.)A durable writing paper used for negotiable certificates which is so made as to expose alterations. Safety pin. A pin bent back on itself to fom a spring, with a guard to cover the point
Safety switch. (Elec.) A knife-blade switch enclosed in an iron box and operated externally.
Safety valve. (Engin.) A safety de­vice for allowing steam or water to escape from a boiler when the pressure may become dangerous. Usually adjusted to permit not more than 5 pounds of pressure above maximum allowable work­ing pressure of the boiler.

Sag. (I) To dip, bend, or cause to bend downward, a depression, es­pecially in the middle. (2) A de­parture from original shape by its own weight, as the sag of a door.
Sagger.(Pot.) A fire-clay box in which delicate pieces are placed while being baked.
Sail. An area of canvas or other fabric extended to the wind in such a way as to transmit, the force of the wind to an assemblage of spars and riggin~ mounted firmly on a hull, raft, iceboat ctc; so as to drive it along.
Sail boat. A boat having sails as its principal means of propulsion.
Sailplane. (Aero.) A performance­ type glider.
Sal ammoniac. (Chern.) Ammonium chloride (NH4CI.) Obtained as a by-product in gas manufacture. Used as a flux in soldering, in the manufacture of dyestuffs, in calico printing, etc.
Sales engineer. Not a salesman, but a builder of good will. He helps the consumer solve his problems. He reports on the performance of his companys product in the field, aids in developing new markets, and should fully cooperate with the sales department.
Salicyclic acid. A powder prepared from salicon or phenol, used as a food preservative.
Salon. (Arch.) A large and magnifi­cent room; usually a room for holding receptions, or displaying exhibits, as distinguished from an assembly room.