From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Present and proposed anti-dazzle headlight systems and the results of winter tests.
Identifier | ExFiles\Box 167\1\ img314 | |
Date | 10th January 1939 | |
BY.5/B.10.1.39. ANTI-DAZZLE. ----------- Present System :- England - Dip and Switch, i.e. Offside extinguished. Nearside dipped. Continent - Double filament bulbs. Yellow glass - France and Germany. Proposed System :- England - Headlamps and Passlamp, i.e.,- Extinguish headlamps and switch on pass lamp. Pass lamp also has a dipper in it for fog or mist. Winter 1937 - 8. Tests to find best lighting to enable speed to be maintained, and to see cyclists, etc. DERBY. { Pass lamp system satisfactory. Pass lamp system unsatisfactory. Dim filaments of double filament bulbs - unsatisfactory. Dim filaments of double filament bulbs - satisfactory. Cx.{Major Len W. Cox - Advertising Manager} LONDON. { Dim filaments of double filament bulbs with pass lamp - satisfactory. Main filament of double filament bulbs just passable. ---------- | ||