ANSI/PIMA IT7.220:1995(R1997)
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
AUDIOVISUAL SYSTEMS - OVERHEAD PROJECTORS - PROJECTION STAGES - DIMENSIONS
Hardcopy , PDF
23-07-2013
English
Foreword
Introduction
1. Scope and field of application
2. Definitions
3. Dimensions of picture area (with rounded or diagonally cut
corners), location pins and clear area
Figure 1: Part of the construction of overhead projectors to
show the relationship between projection stage
aperture, picture area, projection stage and object
plane
Figure 2: Dimensions of picture area and positions of location
pins on projector stage for type A projector
Figure 3: Dimensions of picture area and positions of location
pins on projector stage for type B projector
Figure 4: Dimensions of clear area on type A overhead projector
Figure 5: Dimensions of clear area on type B overhead projector
Annex A: Bibliography
In order to ensure compatibility between overhead projectors and their transparencies the dimensions of projection stages and location pins are specified in this part of ISO 7943. Two types of overhead projector are specified in this part: Type a (250 mm x 250 mm) and Type B (285 mm x 285mm), the significant difference between them being the size of the picture area.
| DevelopmentNote |
Reaffirmation and redesignation of ANSI/NAPM IT7.220-1995
|
| DocumentType |
Standard
|
| Pages |
15
|
| PublisherName |
American National Standards Institute
|
| Status |
Withdrawn
|
| Supersedes |
| Standards | Relationship |
| ISO 7943-1:1987 | Identical |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.