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  1. A switch, or relay group system, which finds the telephone line being called as a result of digits being dialed; it also causes interrupted ringing voltage to be placed on the called line or of returning a busy tone to the calling party if the line is busy. 2. A detachable device for connecting electrical conductors. 3. A metal part for joining timbers. 4. A symbol on a flowchart indicating that the flow jumps to a different location on the chart.


Related Terms

FORMING

  1. Application of voltage to an electrolytic capacitor, electrolytic rectifier, or semiconductor device to produce a desired permanent change in electrical characteristics as a part of the manufacturing process. 2. A process for shaping or molding sheets, rods, or other pieces of hot glass, ceramic ware, plastic, or metal by the application of pressure.

RESTRICTOR

A device for producing a deliberate pressure drop or resistance in a line by reducing the cross-sectional flow area.

DISCHARGE TUBE

  1. An evacuated enclosure containing a gas at low pressure, through which current can flow when sufficient voltage is applied between metal electrodes in the tube. Also known as electric-discharge tube. 2. A tube through which steam and water are released into a boiler drum.

FLANGING

A forming process in which the edge of a metal part is bent over to make a flange at a sharp angle to the body of the part.

MOLD

  1. A pattern or template used as a guide in construction. 2. A cavity which imparts its form to a fluid or malleable substance. 3. The metal part derived from the master by electroforming in reproducing disk recordings; has grooves similar to those of the recording.

BULLET

  1. A conical-nosed cylindrical weight, attached to a wire rope or line, either notched or seated to engage and attach itself to the upper end of a wire line core barrel or other retrievable or retractable device that has been placed in a borehole. Also known as bug; godevil; overshot. 2. A scraper with self-adjusting spring blades, inserted in a pipeline and carried forward by the fluid pressure, clearing away accumulations or debris from the walls of a pipe. Also known as go-devil. 3. A bullet-shaped weight or small explosive charge dropped to explode a charge of nitroglycerin placed in a borehole. Also known as go-devil. 4. An electric lamp covered by a conical metal case, usually at the end of a flexible metal shaft. 5. See torpedo.

ZERO GOVERNOR

A regulating device that is normally adjusted to deliver gas at atmospheric pressure within its flow rating.

FUEL VALVE CONTROL

An automatically or manually operated device consisting essentially of a regulating valve and an operating mechanism. It is used to regulate fuel flow and is usually in addition to the safety shut-off valve. Such valve may be of the automatic or manually opened type.

COMPRESSOR

A device which converts mechanical force and motion into pneumatic flow power.

PURGE INTERLOCK

A device so arranged that an air flow to the furnace above a minimum must exist for a definite time interval before the interlocking system will permit an automatic ignition torch to be placed in operation.

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