ANSI C78.1413-2001 PDF
Name in English:
St ANSI C78.1413-2001
Name in Russian:
Ст ANSI C78.1413-2001
Original standard ANSI C78.1413-2001 in PDF full version. Additional info + preview on request
Full title and description
American National Standard for Dimensions and Centering Systems for Projection Lamps — 51 mm (2 in.) Integral Reflector, Rim Reference Lamps with GX5.3, GY5.3 and GU5.3 Bases (ANSI C78.1413-2001). This standard specifies dimensional limits, centering systems and reference features for 51 mm integral-reflector projection lamps intended to mount by their reflector rims and mate with the GX5.3 / GY5.3 / GU5.3 family of bases to ensure mechanical interchangeability and correct optical alignment.
Abstract
ANSI C78.1413-2001 defines the physical dimensions, rim-reference features and centering systems (both precise and alternate) for 51 mm (2 in.) integral-reflector projection lamps used in projection equipment. The standard establishes tolerances, identification practices, and holding/centering interface details so lamp manufacturers and projector OEMs can achieve repeatable mounting, correct optical centering and safe mechanical interchangeability among lamps meeting the standard.
General information
- Status: Current / Active (listed in standards catalogs and NEMA/ANSI records).
- Publication date: 2001 (ANSI designation; catalog records show the document in NEMA/ANSI collections and later entries/confirmations in the 2000s).
- Publisher: National Electrical Manufacturers Association (NEMA) / ANSI.
- ICS / categories: 29.140 — Lamps and related equipment (incandescent, projection lamps).
- Edition / version: ANSI C78.1413-2001.
- Number of pages: Approximately 10–16 pages (typical for dimensional/centering lamp standards; page counts vary by publisher format).
Scope
This standard applies to 51 mm (2 in.) integral-reflector, rim-reference projection lamps that use GX5.3, GY5.3 or GU5.3 bases. It covers dimensional limits, rim reference datum features, centering-device requirements (precise and alternate centering systems), identification of related components (bases and holding systems), and drawings/figures necessary for manufacture and inspection. The standard does not cover photometric performance, electrical ratings beyond basic base compatibility, nor application-specific projector optical systems.
Key topics and requirements
- Definition of rim-reference datum and dimensional tolerances for 51 mm integral-reflector lamps.
- Specification of centering systems: precise centering and an alternate centering arrangement with dimensional limits.
- Requirements for identification and marking related to base type (GX5.3 / GY5.3 / GU5.3) and rim reference orientation.
- Compatibility and interfacing requirements for lamp bases and holding systems to ensure mechanical interchangeability.
- Figures and schematic drawings that illustrate critical dimensions, centering devices and reference planes.
- Normative references and informative annexes listing related lamp and base standards for cross-reference.
Typical use and users
Primary users include lamp manufacturers, projector OEM mechanical designers, quality and inspection laboratories, test houses, procurement/specification engineers and parts distributors. The standard is used to design and inspect projection lamps so they mount repeatably and align optically in projection equipment that accepts 51 mm rim-reference integral-reflector lamps with GX5.3-family bases.
Related standards
ANSI C78 series standards for projection and integral-reflector lamps (examples include related two-inch/51 mm projection lamp specifications and other C78.x documents covering lamp dimensions, coatings and base specifications), ANSI C78.24 (two-inch integral-reflector lamps with covers and GU5.3/GX5.3 bases), ANSI C78.1420 / C78.1421 (other projection lamp dimension/centering standards), and ANSI C81.61 (guidance for lamp bases and lampholders). Users should consult the broader ANSI C78 family and NEMA publications for related dimensional or photometric requirements.
Keywords
projection lamp, integral reflector, 51 mm, 2 in., rim reference, centering system, GX5.3, GY5.3, GU5.3, NEMA, ANSI, dimensional tolerances, interchangeability
FAQ
Q: What is this standard?
A: ANSI C78.1413-2001 is an American National Standard that specifies dimensions and centering systems for 51 mm (2 in.) integral-reflector, rim-reference projection lamps that use GX5.3 / GY5.3 / GU5.3 family bases.
Q: What does it cover?
A: It covers mechanical and dimensional requirements (rim reference datum, reflector rim geometry), centering systems (precise and alternate), base and holding interface details, identification guidance and figures needed for manufacturing and inspection. It does not set photometric performance tests or detailed electrical performance beyond base compatibility.
Q: Who typically uses it?
A: Lamp manufacturers, projector OEMs and designers, quality/inspection labs, suppliers and procurement/specification engineers use this standard to ensure mechanical interchangeability and correct optical centering in projection lamp assemblies.
Q: Is it current or superseded?
A: The standard is recorded in ANSI/NEMA catalogs as ANSI C78.1413-2001 and appears as an active/current dimensional standard in standards collections. Users should verify with NEMA/ANSI or the official standards publisher for the most recent confirmation, errata or supersession before final specification or procurement.
Q: Is it part of a series?
A: Yes. ANSI C78.1413-2001 is part of the broader ANSI C78 family of standards for electric lamps (projection lamps, integral-reflector lamps and related lamp/base specifications). It is intended to be used alongside other C78.x standards that address related lamp sizes, coatings and base/gauge guidance.
Q: What are the key keywords?
A: Projection lamp, integral reflector, 51 mm, rim reference, centering system, GX5.3, GU5.3, GY5.3, dimensional tolerances, interchangeability, NEMA, ANSI.