A drawing pin (British English) or thumb tack (North American English) is a short nail or pin used to fasten items to a wall or board for display and intended to be inserted by hand, usually using the thumb. A variety of names are used to refer to different designs intended for various purposes. A push pin has a head that allows for easier removal. Map pin or map tack refers to push pins used to mark locations on a map or to hold the map in place. Thumb tack and push pin are both sometimes compounded (thumbtack or pushpin) or hyphenated (thumb-tack or push-pin).
Thumb tacks made of brass, tin or iron may be referred to as brass tacks, brass pins, tin tacks or iron tacks, respectively. These terms are particularly used in the idiomatic expression to come (or get) down to brass (or otherwise) tacks, meaning to consider basic facts of a situation.
Video Drawing pin
History
Edwin Moore invented the "push-pin" in 1900 and founded the Moore Push-Pin Company. Moore described them a pin with a handle. Later, in 1903, in Lychen, German clockmaker Johann Kirsten invented flat-headed pins for use with drawings.
Maps Drawing pin
Design
A drawing pin has two basic components: the head, often made of plastic, metal or wood, and the body, usually made of steel or brass. The head is wide to distribute the force of pushing the pin in, allowing only the hands to be used. Many head designs exist: flat, domed, spherical, cylindrical and a variety of novelty heads such as hearts or stars. Drawing pin heads also come in a variety of colours. These can be particularly useful to mark different locations on a map. Some drawing pin designs have the body cut out of the head and bent downward to produce a pin.
Domed or gripped heads are sometimes preferred over flat heads as dropped flat-headed pins will point upward, posing a hazard. Drawing pins also pose a hazard of ingestion and choking, where they may do serious harm.
References
External links
Source of the article : Wikipedia
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