IEC 60139:2000 pdf download.Preparation of outline drawings for cathode-ray tubes, their components, connections and gauges
1 Scope
This International Standard gives guidance on the preparation of outline drawings of cathode-
ray tubes (CRTs), tube components, tube sub-assemblies and ancillary components with the
object of encouraging the same practice when publications are prepared in different countries.
These recommendations are contained in the specimen drawings, descriptive text and in the
tables of required dimensions.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this International Standard. For dated references, subsequent
amendments to, or revisions of, any of these publications do not apply. However, parties to
agreements based on this International Standard are encouraged to investigate the possibility
of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of IEC
and ISO maintain registers of currently valid International Standards.
IEC 60027-1 :1 995 , Letter symbols to be used in electrical technology – Part 1 : General
IEC 60050 (all parts), International Electrotechnical Vocabulary (IEV)
IEC 6061 7 (all parts), Graphical symbols for diagrams
ISO 1 000: SI units and recommendations for the use of their multiples and of certain other
units
3 Definitions
3.1 Terms and definitions
For the purpose of this International Standard, the following definitions apply.
3.1 .1 anode button
conductive contact which provides electrical continuity from the outside of the insulating
envelope to the anode electrode inside the tube
3.1 .2 axes of the CRT
3.1 .2.1 principal axis
axis perpendicular to the panel and the phosphor screen which passes through the centre
point of the panel, the funnel, deflection yoke region and the electron gun
3.1 .2.2 major axis
axis in the direction of the longer dimension of the CRT screen which passes through and is
perpendicular to the principal axis, normally the horizontal axis
3.1 .2.3 minor axis
axis along the shorter dimension of the CRT screen which passes through and is
perpendicular to the principal axis, normally the vertical axis
3.1 .2.4 diagonal axis
axis connecting opposite corners of the CRT screen
3.1 .3 band
hardware that surrounds the CRT panel and 1 ) holds the mounting lugs and implosion safety
hardware to the CRT, 2) applies compressive loads to the panel for mechanical safety and 3)
contains the panel glass temporarily in the event of breakage
NOTE This band may be mechanically tensioned and joined at a junction; it may be joined to the CRT with resin,or it may also be a single piece that is thermally shrunk over the panel (so called shrink-fit).
3.1 .4 beam clearance
clearance between the electron beam path and the flare region of the funnel connecting the
CRT neck to the body of the funnel
NOTE Prevention of beam impact on the glass is critical for proper operation.
3.1 .5 centre face thickness (CFT)
thickness of the panel at its centre
3.1 .6 corner angle
angle between the major axis and a diagonal of the nominal screen of the design aspect ratio
3.1 .7 deflection angles
angles subtended by the major axis, minor axis and diagonal dimensions of the screen as
viewed from yoke reference line
3.1 .8 design aspect ratio
design value of the ratio of the long to short dimensions of a rectangular area, typically
expressed as a ratio of whole integers such as “4 by 3” or “1 6 by 9”
3.1 .1 2 integral neck components
devices attached to the neck and/or funnel of the CRT by the manufacturer
3.1 .1 3 lug
mounting hardware that has a blade section generally furnished with a mounting hole to
receive a mounting bolt
3.1 .1 4 magnetic shield
ferromagnetic cone, roughly the shape of the funnel, that excludes external magnetic fields
from the electron beam region
3.1 .1 5 mould-match line
line of maximum dimension of the moulded part, located at the mating plane of the two halves
of a mould
3.1 .1 6 mounting system
hardware attached to the CRT that facilitates mounting the CRT
IEC 60139:2000 pdf download
