Document ID: chunk:federal_register_of_legislation:F2023C00165:reg:6v:p17
Version: federal_register_of_legislation:F2023C00165
Segment Type: reg
Provision Reference: reg 6V (pt 17/19)
Character Range: 174833–178812

+/- 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
 Rated values                                                   V                   12                                                                  12

W                                                               21                  5                                          21                                    5
 Test voltage                                                   V                   13.5
Objective values
                                                                 Watts              W              25         6
                                                                                                                                                                     25     6

                                                                                    at 13.5V
+/-%                                                            6                   10                                         6                                     10
Luminous flux                                                   lm                  440            35

+/-%                                                            15                  20
 Reference luminous flux: 440 and 35lm at approx. 13.5V

1/ To be checked by means of a box system, sheets W21/5W/2 and 3.
    2/ Maximum lateral deviation of major filament centre from two mutually perpendicular planes both containing the reference axis and one containing axis X-X.
    3/ "x" and "y" denote the offset of the axis of the minor filament with respect to the axis of the major filament.
CATEGORY W21/5W
Sheet W21/5W/2
Screen projection requirements

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

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. The holder is then so rotated that an end view of the major filament is seen on the screen on to which the image of the filament is projected. The end view of that filament shall be obtained within the angular displacement tolerance limits. (+/- 15 degrees).
           2. Side elevation
The filament lamp placed with the cap down, the reference axis vertical, and the major filament seen end-on.
2.1. the projection of the major 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;
2.2. the projection of the minor filament shall lie entirely within a rectangle of width "c" and height "d" having its centre at a distance "u" above the theoretical position of the centre of the major 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 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