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).
List of approved headlighting devices, rear lamps, and headlight instructions from the Commonwealth of Massachusetts.
| Identifier | ExFiles\Box 61a\1\ scan0378 | |
| Date | 15th March 1928 | |
| APPROVED HEADLIGHTING DEVICES March 15, 1928 Automobile Headlamps Single Filament Type E & J Type 20 Guide Ray Type A Miro-Tilt Ryan-Lite *Two Filament Type, Tilting Beam Depress Beam Dual Light Glolite Parabeam Tilt Beam Tilt Ray Twin Beam Twolite Automobile Reflectors Brown Universal Flat-Lite Standard *Approved bulbs for above named headlamps G.{Mr Griffiths - Chief Accountant / Mr Gnapp} E.{Mr Elliott - Chief Engineer} Mazda No. 1110 Tung-Sol Bi-focal No. T-1110 Westinghouse Mazda No. 1110 Automobile Lenses Alpheco Bausch & Lomb Bausch & Lomb Star Berger Type A DB{Donald Bastow - Suspensions} (Dodge Bros.) Flintex Ford H (8⅛" only) Holophane No Tilt Hudson (8⅛" only) Johnson Liberty Liberty Type D Lincoln Projector McKeelite Monogram Patterson Parab-O-Lite Type FW Smith Spreadlight Standard Motorcycle Lenses McKeelite Monogram Patterson Spreadlight Standard All Motor Vehicles Acetylene headlamps with 6 inch mirrors, ⅝ foot burners and clear glass fronts APPROVED REAR LAMPS March 15, 1928 NOTE: — Each approved rear lamp has the approved name, as given below, stamped in the top of the lamp shell and must be used with its own number plate holder. This plate holder, if bolted to the lamp, also has the approved lamp name stamped into it. If these two parts are riveted or otherwise permanently fastened together no name need appear on the number plate holder. Electric Ace Actuo Aga D17, E18, G5 Aga Tritail Brown 706 Brown Bi-Lite Brown Duplex Brown Triplite Brown Type A Brown Usalite Buick Type A Buielite Cadillac B Cadilite Chevrolet Superior Chrysler-A, B, C, D, E, F Corcolite 55 and 57 Culver Stearns No. 20 D B Types A, B (Dodge Bros.) Dietz Vigilant Type A Dualite Duolight Erskine Filite Ford E, H Foursome Guide A (includes Reo Truck type) Guide B, C Guideco Halco E-35 Hall A Hallco Handy K-21, KM-1 Hudson Essex Type A Hudson-Essex Twinlite Hupp Type B, Type C Indiana Type A, Type B K D Type 33 Keen-lite La{L. A. Archer} Salle Lincoln B, C Marmon Type A Oakland Type A Oldsmobile Model B, C Ortalon Outlook Prismatic Ovalite Packard A Pierce Arrow Type A Pioneer A, B Rerlite Rerlite Rolls Royce 22 Rosco Type C, Type M Seelite Smith No. 241 Solar Type A, Type B Stalite Staub Stoverlite Studebaker Type D Three Way Trilin Triple Ace Twin Dome Two-Way Universal Vedette Wills M Wills Triplite W. O.{Mr Oldham} Co. Types A, B, C Yankee C, D Motorcycles (Electric) Culver Stearns M.{Mr Moon / Mr Moore} C. Harley Davidson Model 2 Victor Type M.{Mr Moon / Mr Moore} C. Acetylene Adlake Type A Dietz Convoy Type B Holt-Light Victor No. 461 Oil Dietz Convoy Type A Ford O Yankee B (Page 2) E57 30M 3-1-'28-3201. 3-'28. NO. 1670 The Commonwealth of Massachusetts DEPARTMENT OF PUBLIC WORKS WILLIAM F.{Mr Friese} WILLIAMS, COMMISSIONER REGISTRY OF MOTOR VEHICLES COMMONWEALTH PIER, BOSTON, MASS. HEADLIGHT INSTRUCTIONS Compliance with the law necessitates the use of 1. An approved device 2. A 21 candlepower bulb 3. A polished reflector and 4. The proper focusing of the bulb and aiming of the lamp. All of the above requirements must be met to secure a legal headlight beam. Devices are approved only after tests which show that they comply with the intent of the law for illumination of the roadway and freedom from glare. If they are not installed in accordance with the instructions given below they will not give the required results. Bear in mind that the proper equipment properly adjusted will benefit the driver of the car as well as other users of the highway, because better road lighting and freedom from glare are both obtained at the same time by proper adjustment. 1. THE APPROVED DEVICE Approved headlamps must be used as manufactured. No substitution of other types of lenses or reflectors is permissible, for such devices are approved as a unit and must be so used. Approved reflectors must be used with clear glass and must be installed right side up so that the name reads correctly. Approved lenses must be installed right side up so that the name reads correctly. Install them carefully so that they are tight and cannot twist around. They must be used with a parabolic reflector (the ordinary equipment). A complete list of approved devices is given on the last page. Every electric headlight must be equipped with one of these devices. Each device bears the name listed in full. Acetylene headlamps may be used if equipped with 6 inch mirrors, ⅝ ft. burners and clear glass fronts. 2. THE BULB You must use a 21 c.p. gas-filled bulb. This applies to all electric headlamps. Bulbs which show signs of blackening or a whitish discoloration on the inside of the glass are inefficient and should be discarded, — they no longer give 21 c.p. All gas-filled bulbs have a finely coiled V shaped filament. None but clear glass bulbs may be used. Don't drive with only one headlight. Carry spare bulbs and avoid arrest. | ||