1、BRITISH STANDARD BS 5550-1.11.1: 1979 ISO 3653:1978 Cinematography Part 1: 8 mm film Section 1.11 Spindles Subsection 1.11.1 Specification for dimensions of spindles for 8 mm Type S motion-picture projector spools UDC 778.5.068.24:778.533.4.068BS5550-1.11.1:1979 This British Standard, having been pr
2、epared under the directionof the Cinematograph Standards Committee, was published under the authority ofthe Executive Board and comesinto effect on 31August1979 BSI 04-2000 The following BSI references relate to the work on this standard: Committee reference CMS/28 Draft for comment 77/64906 DC ISBN
3、 0 580 10862 7 Cooperating organizations The Cinematograph Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Association of Cinematograph, Television and Al
4、lied Technicians* British Broadcasting Corporation* British Film Institute* British Kinematograph, Sound and Television Society* British Photographic Association Chartered Institution of Building Services Cinematograph Exhibitors Association of Great Britain and Ireland Film Laboratory Association L
5、imited Film Production Association of Great Britain Health and Safety Executive Independent Television Companies Association Royal Photographic Society* The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with
6、 the preparation of this British Standard: Association of Independent Cinemas British Amateur Cinematographers Central Council Department of Education and Science Lighting Industry Federation Limited National Association of Theatrical, Television this is not being reproduced as a dual-numbered Briti
7、sh Standard but can be obtained from BSI. BS 5550 is to encompass eventually all British Standards on cinematography. BSI Sectional List 1, obtainable free from the BSI Sales Department, catalogues the British Standards on cinematography. The latest edition of SL 1 should be referred to particularly
8、 in this developing situation. Terminology and conventions. The text of the International Standard has been approved as suitable for publication, without deviation, as a British Standard. Some terminology and certain conventions are not identical with those used in British Standards; attention is es
9、pecially drawn to the following. Where the words “International Standard” appear, referring to this standard, they should be read as “British Standard”. The comma has been used in some places as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the
10、decimal marker. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Internat
11、ional Standard Corresponding British Standard ISO 1700:1972 BS 5550 Cinematography Subsection 1.1.1:1978 Specification for cutting and perforating dimensions of 8 mm Type S motion-picture raw stock film (Identical) ISO 3639 a BS 5052:1973 Projector spools for 8 mm Type S and 8 mm Type R spools for m
12、otion-picture film a In course of preparation. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 and 2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will b
13、e indicated in the amendment table on the inside front cover.BS5550-1.11.1:1979 BSI 04-2000 1 1 Scope and field of application This International Standard specifies the dimensions for 8 mm Type S motion-picture projector supply and take-up reel/spool spindles. 2 References ISO 1700, Cinematography 8
14、 mm Type S motion-picture raw stock film Cutting and perforating dimensions. ISO 3639, Cinematography Projection reels for 8 mm Type S motion-picture film Dimensions and specifications. 3 Dimensions 3.1 The dimensions shall be as shown in the figuregiven in the table. 3.2 The use of spindles in 8 mm
15、 projection equipment is not necessarily restricted to reels operating in the vertical mode. Because horizontal mode is possible, it is not necessary that the spindle protrude completely through the projection reel. Therefore, a reference dimension is supplied primarily for vertical mode design. Whe
16、n horizontal mode operation is considered, the minimum spindle length shall be governed by the minimum lug protrusion dimension B. 3.3 If the manufacturer desires to round, taper or point the end of the spindle, this may be done at his discretion, using any value needed for aesthetic or other design
17、 considerations; hence dimension E is optional. 3.4 The shape and amount, if any, of the extension of the drive lug beyond dimension B is optional with the manufacturer, provided that it does not exceed dimensions C and D. 3.5 A minimum spindle shoulder diameter is provided by dimension G. Good desi
18、gn practice would place any reel-locking device of the spindle outboard of the width of the projection reel at the spindle hole, possibly forcing the reel against the shoulder. The maximum for dimension G is intentionally less than the minimum diameter of the corresponding surface of the reel, to al
19、low for run-out tolerances of both the spindle and reel, and for a loose fit of the reel on the spindle. 3.6 A radius is permitted on the drive lug equivalent to half its width (dimension F) in order to allow manufacturers to use a variety of construction methods or materials. The dimension D specif
20、ied is for a drive lug with no radius (i.e. flat). Any radius(R 1 ) utilized by the manufacturer may beadded to dimension D, so the maximum overallspanof the spindle plus lug becomes D + R 1 .Thedimension D + R 1should not exceed16,2mm(0.638 in). 3.7 The use of three driving lugs equally spaced at12
21、0 around the spindle is not restricted by this International Standard. However, the width and height tolerances of the lug have not been adequately accounted for if such a design is incorporated. If the manufacturer chooses to utilize this approach, he is referred to 8 mm Type S projector reel speci
22、fications (see ISO 3639) to ensure adequate fit. 3.8 Unique spindle designs are not restricted by this International Standard. The use of three or more bearing surfaces can be allowed provided that they perform the same function as a cylinder of diameterA.BS5550-1.11.1:1979 2 BSI 04-2000 Dimension m
23、m in A (see 3.8) 12,70 0.500 B (see 3.2) 4,0 min. 0.16 min. C (see 3.2) 14.0 ref. 0.55 ref. D (see 3.6) 14,2 0.56 D 1(see 3.6) 16,2 max. 0,638 max. E (see 3.3) Optional Optional F 1,40 max. 0.055 max. G 16,00 min. 0.630 min. 24,50 max. 0.965 max. R 1(see 3.6) 0,7 max. 0.03 max. R 2 0,20 max. 0.008 m
24、ax. 0 0,25 0 0.010 +1,5 0 +0.06 0BS5550-1.11.1:1979 BSI 04-2000 Publications referred to See national foreword.BS 5550-1.11.1: 1979 ISO 3653:1978 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. I
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