Online Encyclopedia

Search over 40,000 articles from the original, classic Encyclopedia Britannica, 11th Edition.

PIN (a doublet with " pen " from Lat....

Online Encyclopedia
Originally appearing in Volume V21, Page 615 of the 1911 Encyclopedia Britannica.
Spread the word: del.icio.us del.icio.us it!

See also:

PIN (a doublet with " See also:pen " from See also:Lat. pinna, See also:feather, See also:pinnacle, which is said to contain the same See also:root as irirvs, See also:pine See also:tree, and properly to mean a See also:sharp point or end)  , a small peg or See also:bolt of See also:metal or See also:wood, not necessarily pointed, employed as a fastening to connect together different parts of an See also:article, as a stop to limit the See also:motion of some moving piece in a See also:machine, as a support on which a small See also:wheel may turn, &c., but most commonly a small metal spike, used for fastening portions of fabrics together, having one end pointed and at the other a bulbed See also:head, or some other arrangement for preventing the spike from passing entirely through the See also:cloth or other material with which it is employed . In one See also:form or another pins of this last See also:kind are of the highest 'antiquity, the earliest form doubtless being a natural See also:thorn . Pins of See also:bronze, and bronze brooches in which the See also:pin is the essential feature, are of See also:common occurrence among the remains of the bronze See also:age . The See also:ordinary domestic pin had become in the 15th See also:century an article of sufficient importance in See also:England to See also:warrant legislative See also:notice, as in 1483 the importation of pins was prohibited by See also:statute . In 1540 See also:Queen See also:Catherine received pins from See also:France, and again in 1543 an See also:act was passed providing that " no See also:person shall put to See also:sale any pinnes but only such as shall be See also:double headed, and have the heads soldered fast to the shank of the pinnes, well smoothed, the shank well shapen, the points well and See also:round filed, canted and sharpened." At that See also:time pins of See also:good quality were made of See also:brass; but a large proportion of those against which the legislative enactment was directed were made of See also:iron See also:wire blanched and passed as brass pins . To a large extent the See also:supply of pins in England was received from France till about 1626, in which See also:year the manufacture was introduced into See also:Gloucestershire by See also:John Tilsby . His business flourished so well that he soon gave employment to 1500 persons, and See also:Stroud pins attained a high reputation . In 1636 the pinmakers of See also:London formed a See also:corporation, and the manufacture was subsequently established at See also:Bristol and See also:Birmingham, the latter See also:town ultimately becoming the See also:principal centre of the See also:industry . So See also:early as 1775 the See also:attention of the enterprising colonists in Carolina was See also:drawn to the manufacture by the offer of prizes for the first native-made pins and needles . At a later date several pin-making See also:machines were invented in the See also:United States . During the See also:war of 1812, when the See also:price of pins See also:rose enormously, the manufacture was actually started, but the industry was not fairly successful till about the year 1836 when the See also:Howe Manufacturing See also:Company was formed at Birmingham, See also:Connecticut . Previous to this an See also:American, Lemuel W .

See also:

Wright, had in 1824 secured in England a patent for a machine to make solid-headed pins, which established the industry on its See also:present basis . The old form of pin consisted of a shank with a See also:separate head of See also:fine wire See also:twisted round and secured to it . Fine wire for heads was first See also:wound on a See also:lathe round a See also:spit the exact circumference of the pin shanks to be headed . In this way a See also:long elastic See also:spiral was produced which had next to be cut into heads, each consisting of two See also:complete turns of the spiral . These heads were softened by See also:annealing and made into a heap for the heading boy, whose See also:duty was to thrust a number of shanks into the heap and let as many as might be See also:fit themselves with heads . Such shanks as came out thus headed were passed to the header, who with a falling See also:block and See also:die arrangement compressed together shank and head of such a number as his die-block was fitted for . All the other operations of straightening the wire, cutting, pointing, &c., were separately performed, and these numerous details connected with the See also:production of a common pin were seized on by See also:Adam See also:Smith as one of the most remarkable illustrations of the advantages of the See also:division of labour . The beautiful automatic machinery by which pins are now made of single pieces of wire is an invention of the 19th century . In 1817 a communication was made at the Patent See also:Office by See also:Seth See also:Hunt, describing a machine for making pins with " head, See also:shaft and point in one entire piece." By this machine a suitable length of wire was cut off and held in a die till a globular head was formed on one end by See also:compression, and the other end was pointed by the revolution around it of a roughened See also:steel wheel . This machine does not appear to have come into use; but in 1824 Wright patented the pin-making apparatus above referred to as the See also:parent form of the machinery now employed . A factory equipped with his machines was established in London, but the company which owned it was not successful . The plant passed into the hands of See also:Daniel See also:Foote-Tayler of Birmingham, who obtained an See also:extension of Wright's patent for five years from 1838, and his See also:firm was the first to carry on the production of machine-made solid-headed pins on a commercial basis .

In a See also:

modern pin-making machine wire of suitable See also:gauge See also:running off a See also:reel is drawn in and straightened by passing between straightening pins or studs set in a table . When a pin length has entered it is caught by lateral jaws, beyond which enough of the end projects to form a pin-head . Against this end a steel See also:punch advances and compresses the metal by a die arrangement into the form of a head . The pin length is immediately cut off and the headed piece drops into a slit sufficiently wide to pass the wire through but retain the head . The pins are consequently suspended by the head while their projecting extremities are held against a revolving cutter, by which they are pointed . They are next cleaned by being boiled in weak See also:beer, and then arranged in a See also:copper See also:pan in layers alternating with layers of grained See also:tin . The contents of the pan are covered with See also:water over which a quantity of See also:argol (bitartrate of potash) is sprinkled, and after boiling for several See also:hours the brass pins are coated with a thin See also:deposit of tin, which gives them their silvery See also:appearance . They are then washed in clean water, and dried and polished by being revolved in a See also:barrel, mixed with dry See also:bran or fine sawdust, from which they are winnowed finished pins . A large proportion of the pins sold are See also:stuck into See also:paper by an automatic machine not less ingenious than the pin-making machine itself . See also:Mourning pins are made of iron wire, finished by immersing in See also:black See also:japan and drying in a See also:stove . A considerable variety of pins, including the ingeniously coiled, See also:bent and twisted nursery safety pin, ladies' hairpins, &c., are also made by automatic machinery . The sizes of ordinary pins range from the 32-in. stout blanket pin down to the finest slender gilt pin used by entomologists, 4500 of which weigh about an See also:ounce .

End of Article: PIN (a doublet with " pen " from Lat. pinna, feather, pinnacle, which is said to contain the same root as irirvs, pine tree, and properly to mean a sharp point or end)
[back]
PIMENTO
[next]
RUY DE PINA (1440-1521)

Additional information and Comments

There are no comments yet for this article.
» Add information or comments to this article.
Please link directly to this article:
Highlight the code below, right click and select "copy." Paste it into a website, email, or other HTML document.