Document ID: chunk:federal_register_of_legislation:F2023C00165:reg:6v:p3
Version: federal_register_of_legislation:F2023C00165
Segment Type: reg
Provision Reference: reg 6V (pt 3/3)
Character Range: 51745–52900

the filament are defined by the intersections of the outside of the first and the outside of the last light-emitting turn, respectively, with the plane parallel to and 18mm distant from the reference plane (additional instructions for coiled-coil filaments are under consideration).
CATEGORY H3

Sheet H3/5

Screen Projection Requirements
This test is used to determine, by checking whether the filament is correctly positioned relatively to the reference axis and the reference plane, whether a filament lamp complies with the Requirements.

dimensions in millimetres

      a     c     k    g
      1.8d  1.6d  1.0
6 V                    2.0

12 V  2.8
24 V  2.9

d = diameter of the filament
The filament shall lie entirely within the limits shown.
The centre of the filament shall lie within the limits of dimension k.
CATEGORY H3

Sheet H3/6
Screen Projection Requirements
This test is used to determine, by checking whether the filament is correctly positioned relatively to the reference axis and the reference plane, whether a filament lamp complies with the requirements.

dimensions in mm

     a       b       b    c    h
             1 2