Interpretation ID: 1984-2.7

TYPE: INTERPRETATION-NHTSA

DATE: 06/07/84

FROM: AUTHOR UNAVAILABLE; Frank Berndt; NHTSA

TO: Cibie/Marchal -- G. Couffinhal

TITLE: FMVSS INTERPRETATION

TEXT:

Mr. G. Couffinhal Cibie/Marchal 17, rue Henri Gautier 93012 Bobigny Cedex France

This is in reply to your letter of April 19, 1984, to Richard Van Iderstine of this agency. With respect to the standardized light source socket for replaceable bulb headlamps, you have asked whether a bulb socket design with a "bottom view" diameter of 29.7 mm. etc. would be acceptable.

As you have noted, Dimension P of Figure 3-7 and 3-8 of Standard No. 108 specifies a millimeter dimension of "(28.75 to 28.65)". The dimension of your design exceeds this figure, and is therefore noncompliant with requirements intended to insure proper function with standardized replaceable light sources. It is not permitted by Standard No. 108.

Sincerely,

Frank Berndt Chief Counsel

17, rue Henri Gautier 93012 Bobighy Cedex Telephone (1) 843.93.70 - Telex 210 323 F

N.H.T.S.A. Mr. Richard Van IDERSTINE

Office of Vehicle Safety Standards Room 5307 400 Seventh St., SW WASHINGTON DC 20590 - USA -

Le 19 Avril 1984

Dear Richard

CIBIE requests interpretation concerning the interchangability drawing of the headlamp bulb assembly socket (In reflector) figure 3-7 of the Federal Register - Volume 48 Number 191 - Dated Friday September 30, 1983.

We draw your attention to the bottom view dimension "P" which appears to identify a circle of diameter 28,70 +/- ,005 mm. We would request your opinion about the enclosed drawing dated April 13th 1984 showing three arcs of circle with a diameter of: 29,7 + 1 + 0 mm.

The reason for this request is quite simply in order to obtain a better injection gate in the mould.

This design peculiarity has no effect upon the requirements as laid down by the NHTSA for either the correct installation of the bulb nor the hermeticity of the head light unit.

For information please find enclosed a copy of our drawing E 3277-80 which illustrates the nature of our request.

We would appreciate your interpretation of this matter as soon as possible.

Yours sincerely,

G. COUFFINHAL

COPY: 030 - M. GERARD A36 - M. DORLEANS 039 - Mme THAIN 050 - M. J. MARSHALL

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