Entries starting with S

604 entries.

sacrificial anode

A piece of corrodible metal, attached to a metallic surface to be protected, that is preferentially consumed by electrolytic action

saddle

To cut a saddle-shaped notch in (a log or other piece of wood) so it can fit together with other such logs or pieces; also, to fit (logs or other pieces of wood) together with this method.

safety

A safety lock or safety catch: a mechanism on a weapon or dangerous equipment designed to prevent accidental firing or operation.

safety pin

A pin in the form of a clasp, which has a guard to cover the sharp point; used to join two pieces of fabric, etc., together temporarily.

saloon

the part of a rail carriage or multiple unit containing seating for passengers.

sand jack

A type of jack from which sand can be released gradually in small quantities when lowering something into position.

sandwich shell

A structure consisting of a core (which can be foam or solid, honeycomb, web, corrugated or truss) sandwiched between two thinner outer layers, often made of metal or composite.

sandwich theory

A theory describing the behaviour of a beam, plate, or shell consisting of three layers: two facesheets and one core.

SARMO

Abbreviation of sense and react to military objects; A technology methodology for automated weapons response.

SCADA

Acronym of supervisory control and data acquisition, an electrical network typically containing at least IED's, RTU's, and a master station equipped with an HMI; used to monitor and control process automation systems, such as those used by electrical and water utilities.

scaff tag

A label affixed to scaffolding to certify that it has been erected correctly and is safe to use.

scaffold

An accumulation of adherent, partly fused material forming a shelf or dome-shaped obstruction above the tuyeres in a blast furnace.

scalable

adjectiveManufacturing

Suitable to provide accurate dimensions to manufacturing staff by being measured and having the measurements multiplied by the scale factor.

scale

To take measurements from (an engineering drawing), treating them as (or as if) reliable dimensional instructions.

scary sharp

adjectiveWoodworking

Of tools: sharpened with sandpaper instead of the conventional oilstone or waterstone, etc.

schlich

The finer portion of crushed ore, as of gold, lead, or tin, separated by the water in certain wet processes.

Schmitt trigger

A comparator circuit with hysteresis implemented by applying positive feedback to the non-inverting input of a comparator or differential amplifier. It converts an analog signal to a digital one.

school bus

An informal approximate unit of measure, from the length of a typical public school bus, approximately 30 feet or 9 metres.

scooper

nounIndustrial safetyinformal

A type of air tanker waterbomber airplane, which is capable of landing on water, and directly scooping up water to fill its tanks, by skimming the water's surface with scoops delopyed.

scoria

The slag or dross that remains after the smelting of metal from an ore.

screeding

The process of producing a smooth flat layer of concrete or similar material.

screen

A material woven from fine wires intended to block animals or large particles from passing while allowing gasses, liquids and finer particles to pass.

screen wall

a nonstructural wall erected around units or curbs on a roof. Typically the framing consists of girts with a wood or metal covering attached to the frame.

screen-print

To apply ink or another material onto a surface through a prepared screen, in order to create a picture, design, or pattern.

screw theory

The algebraic calculation of pairs of vectors, such as linear and angular velocity, that arise in the kinematics of rigid bodies.

scribe

To cut (something) in order to fit it closely to an irregular surface, as a baseboard to a floor which is out of level, a board to the curves of a moulding, etc.

scribing block

A device for scribing (marking) lines at a specific height from the base of an object, prior to machining.

scrivet

A type of fastener made of plastic, comprising a screw and a captive nut, made for one-sided access in fastening body panels, fairings, splash shields, and so on; an instance thereof.

scroll

A spiral waterway placed round a turbine to regulate the flow.

scuttle

A hatch that provides access to the roof from the interior of a building.