Document ID: chunk:federal_register_of_legislation:F2023C00165:reg:12v:p1
Version: federal_register_of_legislation:F2023C00165
Segment Type: reg
Provision Reference: reg 12V (pt 1/3)
Character Range: 193325–197951

12V  d +0.4  d +0.8  0.35  6.1  5.2

d = diameter of filament
The filament position is checked solely in directions A and B as shown on sheet HIR1/1.
The beginning of the filament as defined on sheet HIR1/2, note 10/ shall lie between lines Z1 and Z2 and between lines Z3 and Z4.
CATEGORY PY27/7W
Sheet PY27/7W/1

DIMENSIONS in mm                                                 Filament lamps of   Standard
                                                                 normal production   filament lamp

min.                                                             nom.                max.
e                                                                                      27.9                          27.9 +/- 0.3
                                                                                       3/                        9.9 + 0
f                                                                                                                       - 2

                                                                                                    9.9
Lateral deviation 2/                                                                                3/               0.0 +/- 0.4

x 4/                                                                                   5.1 3/                        5.1 +/- 0.5

y 4/                                                                                   0.0 3/                        0.0 +/- 0.5
                                                                                                    3/
beta                                                             75 degrees 3/       90 degrees     105 degrees  90 degrees +/- 5 degrees

Cap WX 2.5x16q in accordance with IEC Publ. 61 (sheet 7004- -1)
ELECTRICAL AND PHOTOMETRIC CHARACTERISTICS
 Rated values                                                    V                        12                     12

W                                                                27                  7                           27                        7
Test voltage                                                     V                        13.5
Objective values
                                                                 Watts
                                                                                     W              29.2         7.7
                                                                                                                                              29.2  7.7

                                                                 at 13.5V
+/-                                                                   10                            10
%
Luminous
Flux                                                             lm                  280            21

+/-                                                                   15
%
Reference luminous flux: Amber bulb: 280 and 21lm
at approx. 13.5V
Clear bulb: 475 and 36lm

    1/ The reference axis is defined with respect to the reference keys and is perpendicular to the reference plane.
    2/ Maximum lateral deviation of major filament centre from two mutually perpendicular planes both containing the reference axis and one containing axis through reference keys.
3/ To be checked by means of a box system, sheets PY27/7W/2 and 3.
    4/ "x" and "y" denote the offset of the axis of the minor (low wattage) filament with respect to the axis of the major (high wattage) filament.
    CATEGORY PY27/7W

Sheet PY27/7W/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 centres of the keys and the reference axis; and
(b)   the whether: 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.

              2. Side elevation

The filament lamp placed with the cap down, the reference axis vertical, the reference key to the right and