Knife switch, which is used by the community for meetings, social gatherings and parties. History. The parish is first mentioned in a document of 969 setting out the boundaries of Aspley Guise, by its original name of Hysseburnan. Within the Domesday Book which was commissioned by William the Conqueror (1066–1087), found that the parish of Husborne Crawley was divided into two manors. The parish was still considered two areas in the Middle Ages, one called Crawley and the other Husborne Crawley, the first was considered to be in the south part of the parish and the other to be the northern part	Husborne Crawley
19034124	. The parish of covers an area of 1,610½ acres, with a large portion (863 acres) of it being open grassland and also a large amount of arable land (414 acres). Population. Husborne Crawley has a population of 237 according to the 2011 census. Increasing from a population of 217 according to the 2001 census. From the graph, the total population has changed large amounts for a small parish, decreasing more recently possibly due to people moving closer to larger local areas such as Milton Keynes, Leighton-Linslade or Dunstable as they are the larger settlements in the area. There are 	Husborne Crawley
19034125	some gaps in the information as none was available, however clearly there has been a general decrease until very recently where the population has increased again. The changes have not been large enough and are more gradual to be from an event that might alter populations rapidly. Economy. The population and their occupations have changed vastly over time, as land use has changed and as the demographic of the population has changed also. From the occupations shown in the graph of 1881, they were mostly employed in agriculture and manufacturing, with very few of the occupants having jobs with professional 	Husborne Crawley
19034126	titles, or working in offices or commercial companies. The population as of 2011 had occupations that are more professional, office workers, and managers. The occupations that require manual labour still exist but are often more skilled trades or machine operators. Throughout the history of the parish its main industry has been agriculture, yields crops of wheat, barley and beans come from the areas very rich soil base. Transport. The M1 Motorway is Husborne Crawley's main transport infrastructure, and is about one mile north-east on the Bedford Road heading eastbound from a roundabout due north of the village, accessible 	Husborne Crawley
19034127	via the roundabout system at junction 13. Here, the Bedford Road also goes north to meet the A421 at a roundabout, which goes north to reach Milton Keynes, and east to reach Bedford, the centres of which are about away, and away respectively. Husborne Crawley is served by Ridgmont railway station which is located away on the other side of the M1 Motorway at Junction 13. London Midland trains serve the station, which also acts as a transport route for workers at an Amazon.com warehouse which is located on the other side of the M1. There are 7 local bus 	Husborne Crawley
19034128	services that run from Husborne Crawley, the largest operator is Centrebus which operates three of the seven main services. Geology. The geology of Husborne Crawley is made up of greensand sandstone, although there are areas of mudstone layered within the sandstone which is part of the Oxford Clay Formation. The soil is therefore mostly sandy and partially clay, with some smaller areas of mixed soil including; sand, alluvium, gravel, clay and silt. Husborne Crawley Husborne Crawley is a small village and civil parish in Bedfordshire, England, located close to Junction 13 of the M1 motorway. The village touches the borders 	Husborne Crawley
19034129	Knife switch Knife switch A knife switch is a type of switch used to control the flow of electricity in a circuit. It is composed of a hinge which allows a metal lever, or knife, to be lifted from or inserted into a slot or jaw. The hinge and jaw are both fixed to an insulated base, and the knife has an insulated handle to grip at one end. Current flows through the switch when the knife is pushed into the jaw. Knife switches can take several forms, including single throw, in which the knife" engages with only a single slot, and  double throw, in which the knife hinge is placed between two slots and can engage with either one. Also, multiple knives may be attached to a single handle and can be used to activate more than one circuit simultaneously. Current uses. Though used commonly in the past, knife switches are now rare, finding use largely in science experiments where the position of the switch may be plainly seen in demonstration. The knife switch is extremely simple in construction and use, but its exposed metal parts present a great risk of electric shock, and the switch is subject to arcing when  opened at higher voltages, which poses a further risk of shock or burns to the operator and can cause fires or explosions under certain conditions. Open knife switches were supplanted by safety switches with current carrying contacts inside a metal enclosure which can only be opened by switching off the power. In modern applications, automatic switches (such as contactors or relays), and manual switches such as circuit breakers are used. These devices use a snap action mechanism which opens the switch contacts rapidly, and feature an arc chute where the arc caused by opening the switch is quenched. These devices  also prevent injury due to accidental contact, as all of the current carrying metal parts of the switch are hidden within or surrounded by insulating guards. Knife switch A knife switch is a type of switch used to control the flow of electricity in a circuit. It is composed of a hinge which allows a metal lever, or knife, to be lifted from or inserted into a slot or jaw. The hinge and jaw are both fixed to an insulated base, and the knife has an insulated handle to grip at one end. Current flows through the switch when the