《BS-5550-3.9.1-1980.pdf》由会员分享，可在线阅读，更多相关《BS-5550-3.9.1-1980.pdf（8页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS 5550-3.9.1: 1980 Incorporating Amendment No. 1 Cinematography Part 3: 35 mm film Section 3.9 Projector spools Subsection 3.9.1 Specification for 35 mm film spools of 610 m capacity (38 cm size) for release prints UDC 778.533.4:77.068.26 Licensed Copy: sheffieldun sheffieldun, na,
2、 Mon Dec 04 13:22:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5550-3.9.1:1980 This British Standard, having been approved by the Cinematograph Standards Committee and endorsed by the Chairman of the Engineering Divisional Council, was published under the authority of the General Council on 3 Oc
3、tober 1949 as BS 1587 BSI 12-1999 ISBN 0 580 34063 5 Co-operating organizations The Cinematograph Standards Committee, under whose supervision this British Standard was prepared, consisted of representatives of the following Government departments and scientific and industrial organizations: Associa
4、ted Photographic Film Manufacturers* Association of Specialised Film Producers* Board of Trade British Film Institute British Film Producers Association* British Kinematograph Society* Cinematograph Exhibitors Association of Gt. Britain and Ireland* Government Cinematograph Adviser Home Office Illum
5、inating Engineering Society Incorporated Association of Kinematograph Manufacturers Ltd.* Kinematograph Renters Society* Ministry of Education Ministry of Supply Royal Photographic Society 16-mm. Film Exhibitors Guild The scientific and industrial organizations marked with an asterisk in the above l
6、ist, together with the following, were represented on the committee charged with the preparation of this British Standard: Association of Film Laboratory Employers British Railways Kinematograph Projectionists and Engineers Association Individual Manufacturers Amendments issued since publication Amd
7、. No.Date of issueComments 2942September 1980 Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 13:22:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5550-3.9.1:1980 BSI 12-1999i Contents Page Co-operating organizationsInside front cover Forewordii 1Scope1
8、 2Dimensions1 3Hub1 4Flanges1 5Finish1 6Running-balance2 Figure 1 Spools for 2,000 ft., 35-mm. cinematograph release prints3 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 13:22:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5550-3.9.1:1980 ii BSI 12-1999 Foreword BS 1587, published in 194
9、9, was complementary to BS 1492:1948 “35 mm cinematograph release prints in 2 000 ft lengths”. BS 1492 was revised in 1970 and again in 1978 when it became BS 5550-5.5.2, to deal only with leaders and run-out trailers. Since BS 1587 was published, spools of larger capacity have come into common use.
10、 These are under study within Technical Committee 36 of the International Organization for Standardization (ISO). BS 1587 was confirmed in 1978 and, as all British Standards on cinematography are to become Sections or Subsections of BS 5550, it has been renumbered as BS 5550-3.9.1. It should be note
11、d that spools that are in accordance with this specification cannot be used on 12.7 mm (1/2in) diameter spindles used for some of the larger capacity spools. Only one type of spool has been specified, which may be used for either transit or projection. It is realized that it may not always be possib
12、le to meet the provisions of this standard as soon as it is published; the primary purpose of the standard is to provide a basis for future design. At present only spools with metal flanges have been specified, but this standard will be extended, or supplemented, if it becomes desirable in the futur
13、e to take into account the use of other materials. 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 obl
14、igations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 3 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cove
15、r. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 13:22:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5550-3.9.1:1980 BSI 12-19991 1 Scope This British Standard prescribes the requirements for spools with metal flanges, to take standard 2,000 ft. 35-mm. cinematograph release prints and ac
16、commodate the maximum permissible length of 2,050 ft. of film. The standard specifies dimensions, essential points of construction, accuracy of assembly, the materials to be used, and the finish required. The standard also provides for the need to earth the spool and film to permit discharge of any
17、static electricity that may accumulate during use. 2 Dimensions a) The spool shall have an outside flange diameter of 143/4 in. to 15 in., and a hub diameter of 41/2 in. to 5 in. b) The interval width between flanges, measured at the periphery of the hub, shall be 11/2in. + 1/32 in. 0 in. c) The ove
18、rall width of the spool, at any point, shall not exceed 2 in. d) The internal diameter of the centre bushing shall be 0.377 in. + 0.002 in. 0 in. 3 Hub a) The hub may be of any suitable material or construction; the bore shall be of a suitable bearing material. b) Provision shall be made for securin
19、g the end of the film by means of a slit or slits cut across the full width of the hub parallel with its axis. The slits shall have a minimum depth or clearance of 1/2in. and shall be approximately 1/16in. wide. c) The hub shall be designed so that a driving-pin can be inserted through each of the h
20、oles specified in Clause 4 d) and the fingers of an operator can project through the finger-holes specified in Clause 4 e). d) If the hub is made of an electrical insulating material, provision shall be made for each flange to make an electrical connection with the spindle, when in use. e) It is rec
21、ommended that the hub should be finished in a distinctive way, preferably in white, to help a projectionist to distinguish the film from the hub, during operation. 4 Flanges a) The flanges shall be made either: i) Of 20 I.S.W.G. or thicker steel, with rib-heights and rolled edges of the dimensions g
22、iven in Figure 1; or ii) Of a non-corrosive alloy or using a different form of construction, provided that the remaining requirements of this standard are met and that the completed spools are of equivalent rigidity, elasticity and strength to those of spools conforming to i) above and to Figure 1.
23、b) Each flange shall be formed with six radial ribs and six lightening holes. The ribs shall have a sufficient area of flat contact surface to provide adequate bearing surface for the edges of the film. The lightening holes shall be not less than 3 in. wide at their widest points and shall expose th
24、e film down to the hub. The form of the ribs is optional provided that they comply with the dimensions given in Figure 1. The height of the ribs shall be 1/64in. less than the height of the peripheral rolled edge, to allow for stacking. c) The ribbing shall be broken so that there is no continuous c
25、oncentric grooving which would permit layers of film to move laterally (see Figure 1). d) Four holes shall be provided in each flange, at an angle of 90, to engage with a driving-pin of 3/16in. maximum diameter at a centre-distance which may be either 7/16 in. or 1/2 in. from the axis of a 3/8in. sp
26、indle and parallel to it. These holes may conveniently take the form of radial slots. e) Four finger-holes not less than 3/4in. in diameter shall be provided in each flange, at an angle of 90 and at a distance of 11/4 to 11/2in. from the centre of the spool. f) Flanges shall be free from warping or
27、buckling and shall run true to within 1/16in. on each flange, when the reel is spun on a 3/8in. shaft. g) The flanges shall be firmly and rigidly attached to the hub, so that they will not come apart under normal conditions of use. 5 Finish a) The spool shall be free from sharp edges. b) The finish
28、shall protect the spool adequately against corrosion under normal conditions of use. c) The finish shall not prevent the discharge of static electricity from the film to the spindle of the projector or winding machine. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 13:22:47 GMT+00:00 2006, U
29、ncontrolled Copy, (c) BSI BS 5550-3.9.1:1980 2 BSI 12-1999 6 Running-balance The spool, when made up, shall provide a satisfactory running-balance. Conversion table inmm 0.002 0.375 0.377 1/64 1/32 1/16 1/8 3/16 1/4 3/8 7/16 1/2 5/8 3/4 1 0.0508 9.5250 9.5758 0.3969 0.7937 1.5875 3.1750 4.7625 6.350
30、0 9.5250 11.1125 12.7000 15.8750 19.0500 25.4000 ftm 2 000 2 050 609.60 624.84 I.S.W.Gmm 200.914 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 13:22:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5550-3.9.1:1980 BSI 12-19993 Figure 1 Spools for 2,000 ft., 35-mm. cinematograph release prin
31、ts All dimensions in inches Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 13:22:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5550-3.9.1: 1980 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British
32、 Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the
33、 constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cove
34、r. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to
35、 Customer Services. Tel: 020 8996 9001. Fax: 020 8996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of i
36、nformation on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: 020 8996 7111. Fax: 0
37、20 8996 7048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: 020 8996 7002. Fax: 020 8996 7001. Copyright Copyright subsis
38、ts in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any
39、means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other
40、 purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 13:22:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI