Document ID: chunk:federal_register_of_legislation:F2023C00165:reg:6v:p18
Version: federal_register_of_legislation:F2023C00165
Segment Type: reg
Provision Reference: reg 6V (pt 18/19)
Character Range: 178584–182316

lamp being viewed in a direction at right angles to the axis of the major filament:
3.1. the projection of the major filament shall lie entirely within a rectangle of height "a" and width "h", centred on the theoretical position of the centre of the filament;
3.2. the centre of the major filament shall not be offset by more than distance "k" from the reference axis;
3.3.  the centre of the minor filament shall not be offset from the reference axis by more than +/- 2mm (+/- 0.4mm for standard lamps).
CATEGORY W21/5W

Sheet W21/5W/3

Side elevation

Reference   a    b    c    d    u
Dimensions  3.5  3.0  4.8  2.8

Front elevation

Reference   a    h    k
Dimensions  3.5  9.5  1.0

CATEGORY W2.3W

Sheet W2.3W/1

                                                                  Filament lamps of   Standard
DIMENSIONS in mm                                                  normal production   filament
                                                                  min.                nom.       max.         lamp
e                                                                 10.3                10.8       11.3         10.8 +/- 0.3
Lateral deviation 1/                                                                             1.0          0.5 max.
beta                                                              -15 degrees         0 degrees  +15 degrees  0 degrees +/- 5 degrees
Cap W 2 x 4.6d in accordance with IEC Publ. 61 (sheet 7004-94-2)
ELECTRICAL AND PHOTOMETRIC CHARACTERISTICS
 Rated values                                                     V                              12                                    12

W                                                                                     2.3                     2.3
 Test voltage                                                     V                              13.5
Objective
values                                                            W                              2.5 max.                              2.5 max. at 13.5V

Luminous
flux lm                                                                               18.6
+/- %
                                                                  20

 Reference luminous flux : 18.6lm at approx. 13.5V

    1/ Maximum lateral deviation of filament centre from two mutually perpendicular planes both containing the reference axis and one containing axis X-X.
2/ See paragraph 3.5.3.
CATEGORY H8

Sheet H8/1

The drawings are intended only to illustrate the essential dimensions of the filament lamp.

Figure 1 – Main drawing

Figure 2
Maxiimum lamp outline 3/

    1/ The reference plane is the plane formed by the underside of the beveled lead-in flange of the cap.
    2/ The reference axis is perpendicular to the reference plane and passing through the centre of the 19mm cap diameter.
    3/ Glass bulb and supports shall not exceed the envelope as indicated in figure 2. The envelope is concentric to the reference axis.
4/ The bulb shall be colourless or yellow.
5/ Notes concerning the filament diameter.
         - No actual diameter restrictions apply but the objective for future developments is to have dmax.=1.2mm
         - For the same manufacturer, the design diameter of standard (etalon) filament lamp and filament lamp of normal production shall be the same.
CATEGORY H8

Sheet H8/2

    6/ Glass bulb shall be optically distortion free within the angles gamma 1 and gamma 2. This requirement applies to the whole bulb circumference within the angles gamma1 and gamma 2.
    7/ The obscuration shall extend at least to angle gamma 3 and shall extend at least to the cylindrical part of the bulb on the whole bulb top circumference.
    8/ The