Assertion: trip computer | /r/AtLocation | 1950
Facets:
value: to enable the driver
type: PURPOSE
value: as car accessories
type: MANNER
Source sentences:
text: The first, mechanical trip computers, such as the Halda Speedpilot, produced by a Swedish taximeter manufacturer, were made in the 1950s as car accessories to enable the driver to maintain a given time schedule, particularly useful in rallying.