Editing Headlamp (section)

==== Rabinow dimmer ====
Though the systems based on photoresistors evolved, growing more compact and moving from the dashboard to a less conspicuous location behind the radiator grill, they were still unable to reliably distinguish headlamps from non-vehicular light sources such as streetlights. They also did not dip to low beam when the driver approached a vehicle from behind, and they would spuriously dip to low beam in response to road sign reflections of the vehicle's own high beam headlamps. American inventor [[Jacob Rabinow]] devised and refined a scanning automatic dimmer system impervious to streetlights and reflections,<ref>{{cite web |url=http://museum.nist.gov/exhibits/rabinow/patents.html |title=Jacob Rabinow - patent 2917664 |website=Museum.nist.gov |access-date=20 May 2014 |archive-url= https://web.archive.org/web/20140530000016/http://museum.nist.gov/exhibits/rabinow/patents.html |archive-date=30 May 2014 |url-status=dead}}</ref> but no automaker purchased the rights, and the problematic photoresistor type remained on the market through the late 1980s.<ref>{{cite book |last=Rabinow |first=Jacob |author-link=Jacob Rabinow |title=Inventing for Fun and Profit |publisher=San Francisco Press |date=May 1990 |isbn=978-0-911302-64-6 |url-access=registration |url= https://archive.org/details/inventingforfunp00rabi }}</ref>