Document ID: chunk:federal_register_of_legislation:F2023C00165:reg:6v:p16
Version: federal_register_of_legislation:F2023C00165
Segment Type: reg
Provision Reference: reg 6V (pt 16/19)
Character Range: 170695–175285

V                              12                                12

W                                                                                   21                         21
 Test voltage                                                   V                              13.5
Objective values                                                W
                                                                +/-%                           25                                25 at 13.5V

                                                                6                              6
Luminous
flux lm                                                                             460
+/- %
                                                                15

 Reference luminous flux: 460lm at approx. 13.5V

    1/ Maximum lateral deviation of filament centre from two mutually perpendicular planes both containing the reference axis and one containing the axis X-X.
2/ To be checked by means of a box system, sheet W21W/2.
CATEGORY W21W
Sheet W21W/2

Screen projection requirements
This test is used to determine, by checking whether the filament is correctly positioned relative to the reference axis and the reference plane and has an axis perpendicular, within +/- 15 degrees, to the plane through the axis X-X and the reference axis, whether a filament lamp complies with the requirements.

Side elevation Front elevation
Reference  a    b    h    k
Dimension  3.5  3.0  9.5  1.0

Test procedure and requirements

     1. The filament lamp is placed in a holder capable of being rotated about its axis and having either a calibrated scale or fixed stops corresponding to the angular displacement tolerance limits, i.e +/-15 degrees. The holder is then so rotated that an end view of the filament is seen on the screen on to which the image of the filament is projected. The end view of the filament shall be obtained within the angular displacements tolerance limits (+/- 15 degrees)

2.      Side elevation
The filament lamp placed with the cap down, the reference axis vertical and the filament seen end-on, the projection of the filament shall lie entirely within a rectangle of height "a" and width "b", having its centre at the theoretical position of the centre of the filament.

3.      Front elevation
The filament lamp placed with the cap down and the reference axis vertical, the filament lamp being viewed in a direction at right angles to the filament axis:
         3.1.            the projection of the filament shall lie entirely within a rectangle of height "a" and width "h", having its center at the theoretical position of the centre of the filament;
         3.2.              the centre of the filament shall not be offset by more than distance "k" from the reference axis.
CATEGORY W21/5W
Sheet W21/5W/1
a = major (high wattage) filament
b = minor (low wattage) filament

DIMENSIONS in mm                                                Filament lamps of   Standard
                                                                normal production   filament lamp

min.                                                            nom.                max.
e                                                                                                  25.0                                                 25.0
                                                                                                                                                        +/- 0.3
                                                                                                   1/                                                   7.5 + 0
f                                                                                                             7.5                                       - 2

Lateral deviation 2/                                                                                          1/                                        0.3 max

        x                                                                                          2.8 1/                                               2.8 +/- 0.3

        3/                                                                                         0.0 1/                                               0.0 +/- 0.3
        y
        3/                                                      - 15 degrees 1/                    0 degrees  +15 degrees 1/   0 degrees +/- 5 degrees
        beta
Cap W 3x16q in accordance with IEC Publ. 61 (sheet 7004-106-1)
ELECTRICAL AND PHOTOMETRIC CHARACTERISTICS