header

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header

1. a reservoir, tank, or hopper that maintains a gravity feed or a static fluid pressure in an apparatus
2. a manifold for distributing a fluid supply amongst a number of passages
3. a machine that trims the heads from castings, forgings, etc., or one that forms heads, as in wire, to make nails
4. a person who operates such a machine
5. the action of striking a ball with the head
6. Computing a block of data on a tape or disk providing information about the size, location, etc., of a file

Header

A masonry unit laid so that its short end is parallel to the face, overlapping two adjacent widths of masonry; a framing member supporting the ends of joists, transferring the weight of the latter to parallel joists and rafters.

Header

 

the cutting unit of a grain-harvesting combine. It cuts the stalks and feeds them on a conveyor to the thresher.

header

[′hed·ər]
(building construction)
A framing beam positioned between trimmers and supported at each end by a tail beam.
(civil engineering)
Brick or stone laid in a wall with its narrow end facing the wall.
(communications)
The first section of a message, which contains information such as the addressee, routing, data, and origination time.
(computer science)
(electricity)
A mounting plate through which the insulated terminals or leads are brought out from a hermetically sealed relay, transformer, transistor, tube, or other device.
(engineering)
A pipe, conduit, or chamber which distributes fluid from a series of smaller pipes or conduits; an example is a manifold.
(graphic arts)
Text that is printed at the top of every page of a document or report; may contain the page number.
(mechanical engineering)
A machine used for gathering or upsetting materials; used for screw, rivet, and bolt heads.
(mining engineering)
An entry-boring machine that bores the entire section of the entry in one operation.
A rock that heads off or delays progress.
A blasthole at or above the head.

header

1. A masonry unit, laid so that its ends are exposed, overlapping two or more adjacent withes of masonry and tying them together; a bondstone; a bonder.
3. A framing member which crosses and supports the ends of joists, rafters, etc., transferring the weight of the latter to parallel joists, rafters, etc.
4. In plumbing, a pipe having many outlets which are parallel and frequently at 90° to the center line of the pipe.
5. A chamber into which a number of pipes open.
7. A transverse raceway for electrical conductors which provides access to a cellular floor, thereby permitting the convenient installation of electrical conductors.
8. The structural member immediately over a door opening.

header joist, header, lintel, trimmer joist

header joist
header, 3
header, 1
A short structural member (as used in framing an opening) which is fastened between parallel full-length framing members at right angles to

header

(1)
The portion of a packet, preceding the actual data, containing source and destination addresses, error checking and other fields.

header

(2)
The part of an electronic mail message or news article that precedes the body of a message and contains, among other things, the sender's name and e-mail address and the date and time the message was sent.

header

(1) In a disk or tape file, a set of data that resides permanently at the beginning. It may be used for identification only (type of file, date of last update, etc.), or it may describe the structural layout of the contents, as is common with many document and database formats.

(2) In a document or report, common text printed at the top of every page.

(3) Any caption or description used as a headline.

(4) In communications and networking, a group of fields added to the beginning of the message or packet. The fields typically include source and destination addresses as well as data that describe the message content. See HTTP header, e-mail header and header file.
References in periodicals archive ?
Connection to the On-Shore Contract Works at the four (three for Phase I and one for the future Phase) flanged stub ends exiting the Header Tank.
The pumps transfer the fillings from a hopper, which gives the pumps a flooded suction into a header tank over the filling lines.
AtvDairy Crest, the bottles are filled from a rotating header tank which rotates with the filler carousel.
The Festo solution uses a pump-style piston assembly which first draws product from a hopper or header tank, switches a valve to redirect the flowpath, then dispenses the product through nozzles into containers on a process line.
The supply network that exploits ATLL CGC SA is the Ter-Llobregat network and is composed of three production plants: red adduction from reservoir Pasteral (Girona), underground pipes of various diameters and features, header tanks supplied to municipalities and pumping stations.
Escape of water, caused through sudden and unforeseen circumstances such as bursts from pipes or header tanks, is one of the most common reasons for home insurance claims.
Empty water completely from the safety shower header tanks and internally clean inside to remove any build up of algae.
Dorman CHP packages include header tanks, vent valves and pressure safety valves making Dorman CHP systems not only one of the most technically advanced but also one of the safest.
Greater Nancy wishes to entrust to the operator the operation and management of all facilities and equipment constituting the plant Edouard Imbeaux, with the header tanks attached to factories located in Vandoeuvre and the facilities and equipment of decision water right bank of Moselle Mereville, with pretreatments.
At Tarporley High School, around 1,000 pupils will have to stay at home today while the school's header tanks are purged.
The council-run Temple Park Leisure Centre in South Shields will shut its doors to enable contractors to investigate and repair the problems with the hot water header tanks.
Rainwater collected from the roof of the visitor centre is stored in a 22,500-litre underground tank and then pumped into two linked header tanks by a submersible pump, powered by wind and solar- generated electricity.