Editing Seat belt (section)

===Three-point===
[[File:Seatbelt.jpg|thumb|upright|A three-point seat belt]]

A three-point belt is a Y-shaped arrangement, similar to the separate lap and sash belts, but unified. Like the separate lap-and-sash belt, in a collision, the three-point belt spreads out the energy of the moving body over the chest, pelvis, and shoulders. Volvo introduced the first production three-point belt in 1959.<ref>{{cite web |url= http://www.volvoclub.org.uk/press/releases/2007/20_years_air_bags.shtml |title=Volvo Cars airbag celebrates 20 years |website=Volvoclub.org.uk |date=2007-05-26 |access-date=2009-08-29}}</ref> The first car with a three-point belt was a [[Volvo PV444/544|Volvo PV 544]] that was delivered to a dealer in [[Kristianstad]] on August 13, 1959. The first car model to have the three-point seat belt as a standard item was the 1959 [[Volvo 122]], first outfitted with a two-point belt at initial delivery in 1958, replaced with the three-point seat belt the following year.<ref name=VolvoLindh>{{cite book |last = Lindh |first = Björn Erik |year = 1986 |title = Volvo The Cars from the 20s to the 80s |chapter = The Amazon/120 - Beauty with Brown |publisher = Förlagshuset Norden, Malmö |page = 134 |quote = The 1959 model (which appeared in August 1958) had a major innovation in the form of front seat safety belts as standard equipment on all the cars, including the export models. Volvo was the world's first automaker to take this step, even though Ford fitted a "lap" belt on one or other of its cars in the middle of the 50s. |isbn = 91-86442-14-7 }}</ref> The three-point belt was developed by [[Nils Bohlin]], who had earlier also worked on [[ejection seat]]s at [[Saab Group|Saab]].<ref>{{cite web |url=http://www.alltommotor.se/artiklar/nyheter/trepunktsbaltet-50-ar-1.14639 |title=Allt om Motor: Trepunktsbältet 50 år |website=Alltommotor.se |access-date=2011-02-02 |archive-date=2009-08-17 |archive-url=https://web.archive.org/web/20090817143721/http://www.alltommotor.se/artiklar/nyheter/trepunktsbaltet-50-ar-1.14639 |url-status=dead }}</ref> Volvo then made the new seat belt design patent open in the interest of safety and made it available to other car manufacturers for free.<ref>{{cite web |title=Three-point seatbelt inventor Nils Bohlin born |url= https://www.history.com/this-day-in-history/three-point-seatbelt-inventor-nils-bohlin-born |website=History.com |date=July 15, 2020 |access-date=January 11, 2021}}</ref><ref>{{cite press release |title=Volvo's Three-Point Safety Belt Celebrates 50 Years of Saving Lives |url= http://www.theautochannel.com/news/2009/08/11/473711.html |website=theautochannel.com |date=August 11, 2009 |access-date=January 11, 2021}}</ref>

====Belt-in-Seat====
The Belt-in-Seat (BIS) is a three-point harness with the shoulder belt attached to the seat itself, rather than to the vehicle structure. The first car using this system was the [[Range Rover Classic]], which offered BIS as standard on the front seats from 1970.<ref>{{cite web |last=Lankard |first=Tom |url= http://editorial.autos.msn.com/article.aspx?cp-documentid=434695 |title=The first seat offered in the US that incorporated a three-point belt—on the 1990 Mercedes-Benz SL |website=Editorial.autos.msn.com |access-date=2011-02-02 |archive-url= https://web.archive.org/web/20140727011325/http://editorial.autos.msn.com/article.aspx?cp-documentid=434695 |archive-date=2014-07-27 |url-status=dead }}</ref> Some cars, like the [[Renault Vel Satis]], use this system for the front seats. A [[General Motors]] assessment concluded seat-mounted three-point belts offer better protection, especially to smaller vehicle occupants,<ref>{{Cite web |url=http://www.khou.com/news/upclose/stories/khou030630_ds_UpCloseConsumerSafetybelts.44b60c63.html |title=Up Close: Seatbelt safety in question |work=KHOU News |date=20 June 2003 |archive-url=https://archive.today/20080612131300/http://www.khou.com/news/upclose/stories/khou030630_ds_UpCloseConsumerSafetybelts.44b60c63.html |archive-date = 12 June 2008}}</ref> though GM did not find a safety performance improvement in vehicles with seat-mounted belts versus belts mounted to the vehicle body.<ref name=MSN>{{cite web |url= http://editorial.autos.msn.com/article.aspx?cp-documentid=434695 |title=In Search of the Perfect Seat Belt |archive-url= https://web.archive.org/web/20140727011325/http://editorial.autos.msn.com/article.aspx?cp-documentid=434695 |archive-date=2014-07-27}}</ref>

Belt-in-Seat type belts have been used by automakers in convertibles and pillarless hardtops, where there is no "B" pillar to affix the upper mount of the belt. Chrysler and Cadillac are well known for using this design. Antique auto enthusiasts sometimes replace original seats in their cars with BIS-equipped front seats, providing a measure of safety not available when these cars were new. However, modern BIS systems typically use electronics that must be installed and connected with the seats and the vehicle's electrical system in order to function properly.{{citation needed |date=August 2013}}